:root {
    --color-bg: #f5f3ef;
    --color-surface: #ffffff;
    --color-primary: #2c4a6e;
    --color-primary-hover: #1e3a5f;
    --color-text: #1a1a2e;
    --color-text-primary: #1a1a2e;
    --color-text-secondary: #5c6370;
    --color-text-tertiary: #8b919a;
    --color-border: #d8d4ce;
    --color-success: #2d8659;
    --color-warning: #c58c27;
    --color-error: #c0392b;
    --color-info: #2c6fbb;
    --radius: 0.375rem;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.08);
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-serif: 'Noto Serif', 'Georgia', 'Times New Roman', serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', monospace;
    --color-accent: #6b4c8a;
    --color-accent-light: #f0ebf5;
    --nav-h: 3.5rem;
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

[hidden] {
    display: none !important;
}

html {
    height: 100%;
}

body {
    font-family: var(--font-sans);
    background: #ecebe4;
    color: var(--color-text);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100%;
    height: 100%;
    overflow: hidden;
}

/* Navigation */
.nav {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 0.875rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    min-height: 3.5rem;
    flex-shrink: 0;
    z-index: 100;
}

.nav__brand {
    color: var(--color-primary);
    margin-right: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    cursor: pointer;
    transition: opacity 0.15s;
    flex-shrink: 0;
}

.nav__brand:hover {
    opacity: 0.85;
}

.nav__brand-stack {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    min-width: 0;
    line-height: 1.1;
}

.nav__brand-text {
    font-family: var(--font-serif);
    font-size: 15px;
    font-weight: 500;
    color: #1F3864;
    letter-spacing: -0.005em;
    line-height: 1.15;
    white-space: nowrap;
}

.nav__brand-subtitle {
    font-family: var(--font-sans);
    font-size: 11px;
    font-weight: 400;
    color: var(--color-text-tertiary);
    letter-spacing: 0;
    line-height: 1.25;
    margin-top: 0.125rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 26rem;
}

.nav__brand-subtitle[hidden] {
    display: none;
}

.nav__logo {
    width: 2rem;
    height: 2rem;
    object-fit: contain;
    flex-shrink: 0;
    transition: width 0.2s, height 0.2s;
}

.nav__logo--custom {
    width: auto;
    height: 2.25rem;
    max-width: 10rem;
}

.nav__links {
    display: flex;
    align-items: center;
    gap: 0.125rem;
    margin-left: auto;
}

.nav__link {
    position: relative;
    padding: 0.4375rem 0.875rem;
    text-decoration: none;
    color: var(--color-text-secondary);
    border-radius: var(--radius);
    font-family: var(--font-sans);
    font-size: 13px;
    font-weight: 400;
    letter-spacing: 0;
    transition: background 0.15s, color 0.15s;
}

.nav__link:hover {
    background: transparent;
    color: var(--color-text);
}

.nav__link--active {
    background: transparent;
    color: var(--color-text-primary);
    font-weight: 500;
    padding-bottom: 2px;
    border-bottom: 2px solid #1F3864;
    border-radius: 0;
}

.nav__link--active:hover {
    background: transparent;
    color: var(--color-text-primary);
}

/* ─── Nav "More" dropdown ────────────────────────────────────── */

.nav__more {
    position: relative;
}

.nav__more-toggle {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.4375rem 0.75rem;
    background: transparent;
    border: none;
    border-radius: var(--radius);
    font-family: var(--font-sans);
    font-size: 13px;
    font-weight: 400;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
    white-space: nowrap;
}

.nav__more-toggle:hover {
    background: transparent;
    color: var(--color-text);
}

.nav__more-toggle--active {
    background: transparent;
    color: var(--color-text);
    font-weight: 600;
}

.nav__more-toggle--active::after {
    content: "";
    position: absolute;
    left: 0.75rem;
    right: 0.75rem;
    bottom: -0.1875rem;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
}

.nav__more-toggle--active:hover {
    background: transparent;
    color: var(--color-text);
}

.nav__more-toggle--active .nav__more-chevron {
    color: var(--color-text);
}

.nav__more-chevron {
    transition: transform 0.2s;
}

.nav__more--open .nav__more-chevron {
    transform: rotate(180deg);
}

.nav__more-dropdown {
    display: none;
    position: absolute;
    top: calc(100% + 0.375rem);
    right: 0;
    min-width: 10rem;
    background: var(--color-surface, #fff);
    border: 1px solid var(--color-border, #e5e7eb);
    border-radius: 0.5rem;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12), 0 2px 8px rgba(0, 0, 0, 0.08);
    padding: 0.375rem;
    z-index: 200;
    animation: navMoreIn 0.15s ease-out;
}

.nav__more--open .nav__more-dropdown {
    display: flex;
    flex-direction: column;
}

@keyframes navMoreIn {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}

.nav__more-item {
    display: block;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius);
    white-space: nowrap;
}

/* Main content */
.main {
    flex: 1;
    min-height: 0;
    max-width: 72rem;
    margin: 0 auto;
    padding: 2rem 1.5rem 2rem;
    overflow-y: auto;
    width: 100%;
}

/* ─── Global app footer ───────────────────────────────────────── */

.app-footer {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.25rem 1rem;
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    font-size: 0.6875rem;
    color: var(--color-text-secondary);
    z-index: 90;
}

.app-footer__text {
    text-align: center;
    line-height: 1.4;
}

@media (max-width: 32rem) {
    .app-footer {
        font-size: 0.625rem;
        padding: 0.25rem 0.75rem;
    }
}

/* Upload view */
.upload {
    max-width: 40rem;
    margin: 0 auto;
}

.upload__title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.upload__dropzone {
    border: 2px dashed var(--color-border);
    border-radius: var(--radius);
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s;
    background: var(--color-surface);
}

.upload__dropzone:hover,
.upload__dropzone--active {
    border-color: var(--color-primary);
    background: color-mix(in srgb, var(--color-primary) 5%, white);
}

.upload__dropzone-text {
    color: var(--color-text-secondary);
    margin-bottom: 0.5rem;
}

.upload__dropzone-hint {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
}

.upload__input {
    display: none;
}

.upload__status {
    margin-top: 1.5rem;
}

.upload__file {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1rem;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.upload__file-name {
    font-weight: 500;
    font-size: 0.875rem;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.125rem 0.5rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.badge--pending { background: #fef3c7; color: #92400e; }
.badge--processing { background: #dbeafe; color: #1e40af; }
.badge--ready { background: #d1fae5; color: #065f46; }
.badge--error { background: #fee2e2; color: #991b1b; }

/* Library view */
.library {
    max-width: 100%;
    margin: 0 auto;
}

.library__header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 2rem;
    gap: 2rem;
}

.library__title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.375rem;
    color: var(--color-text);
}

.library__subtitle {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
}

.library__header-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.library__upload-btn {
    text-decoration: none;
    white-space: nowrap;
}

.library__stats {
    display: flex;
    gap: 1.5rem;
}

.library__stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem 1.5rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    min-width: 7rem;
}

.library__stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
}

.library__stat-label {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--color-text-secondary);
    margin-top: 0.375rem;
}

.library__content {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.library__table-wrapper {
    overflow-x: hidden;
}

.library__loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

.library__empty {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

.library__table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
    table-layout: fixed;
}

.library__table thead {
    background: var(--color-bg);
    border-bottom: 2px solid var(--color-border);
}

.library__th {
    padding: 0.875rem 1rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--color-text-secondary);
    white-space: nowrap;
}

.library__th--filename {
    width: auto;
}

.library__th--status {
    width: 6.5rem;
}

.library__th--pr {
    width: 3rem;
    text-align: center;
}

.library__td--pr {
    text-align: center;
    vertical-align: middle;
}

.peer-reviewed-check {
    width: 1rem;
    height: 1rem;
    margin: 0;
    cursor: pointer;
    accent-color: #059669;
}

.peer-reviewed-check:disabled,
.peer-reviewed-check--readonly {
    cursor: default;
    opacity: 0.85;
}

.library__th--pages {
    width: 4.5rem;
    text-align: center;
}

.library__th--size {
    width: 5.5rem;
}

.library__th--date {
    width: 7rem;
}

.library__th--actions {
    width: 10rem;
    text-align: center;
}

.library__row {
    border-bottom: 1px solid var(--color-border);
    transition: background 0.1s;
}

.library__row:last-child {
    border-bottom: none;
}

.library__row:hover {
    background: var(--color-bg);
}

.library__td {
    padding: 0.875rem 1rem;
    color: var(--color-text);
    vertical-align: middle;
}

.library__td--filename {
    font-weight: 500;
    overflow: hidden;
}

.library__td--pages,
.library__td--actions {
    text-align: center;
}

.library__doc-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 0;
}

.library__doc-icon {
    color: var(--color-primary);
    flex-shrink: 0;
    opacity: 0.7;
}

.library__doc-details {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    min-width: 0;
    overflow: hidden;
}

.library__doc-name {
    font-weight: 500;
    color: var(--color-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.library__doc-name--hoverable {
    cursor: help;
    text-decoration: underline;
    text-decoration-style: dotted;
    text-decoration-color: var(--color-primary);
    text-underline-offset: 2px;
}

.library__doc-authors {
    font-size: 0.75rem;
    line-height: 1.3;
    color: var(--color-primary);
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.library__doc-clickable {
    cursor: pointer;
    transition: color 0.15s;
}

.library__doc-clickable:hover {
    color: var(--color-primary);
}

.library__doc-summary {
    font-size: 0.75rem;
    line-height: 1.4;
    color: var(--color-text-secondary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

.library__doc-title-row {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    min-width: 0;
}

.library__edit-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.25rem;
    height: 1.25rem;
    padding: 0;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 0.25rem;
    color: var(--color-text-secondary);
    cursor: pointer;
    opacity: 0;
    transition: all 0.15s;
    flex-shrink: 0;
}

.library__row:hover .library__edit-btn {
    opacity: 0.6;
}

.library__edit-btn:hover {
    opacity: 1 !important;
    color: var(--color-primary);
    border-color: var(--color-primary);
    background: var(--color-bg);
}

/* ── Peer-reviewed indicator & toggle ───────────────────────────── */

.peer-reviewed-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    margin-top: 0.25rem;
    font-size: 0.7rem;
    font-weight: 500;
    color: #059669;
    letter-spacing: 0.01em;
}

.peer-reviewed-badge__dot {
    display: inline-block;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background-color: #059669;
    flex-shrink: 0;
}

.peer-reviewed-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    margin-top: 0.25rem;
    padding: 0.15rem 0.4rem;
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    background: transparent;
    border: 1px solid var(--color-border, #e5e7eb);
    border-radius: 9999px;
    cursor: pointer;
    transition: all 0.15s;
    letter-spacing: 0.01em;
    opacity: 0.5;
}

.library__row:hover .peer-reviewed-toggle {
    opacity: 1;
}

.peer-reviewed-toggle__dot {
    display: inline-block;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background-color: var(--color-border, #d1d5db);
    flex-shrink: 0;
    transition: background-color 0.15s;
}

.peer-reviewed-toggle:hover {
    color: #059669;
    border-color: #059669;
    background: #ecfdf5;
    opacity: 1;
}

.peer-reviewed-toggle:hover .peer-reviewed-toggle__dot {
    background-color: #059669;
}

.peer-reviewed-toggle--active {
    color: #059669;
    border-color: #059669;
    background: #ecfdf5;
    opacity: 1;
}

.peer-reviewed-toggle--active .peer-reviewed-toggle__dot {
    background-color: #059669;
}

.peer-reviewed-toggle--active:hover {
    color: #dc2626;
    border-color: #dc2626;
    background: #fef2f2;
}

.peer-reviewed-toggle--active:hover .peer-reviewed-toggle__dot {
    background-color: #dc2626;
}

.peer-reviewed-toggle--active:hover .peer-reviewed-toggle__label::before {
    content: 'Remove ';
}

.library__meta-backdrop {
    position: fixed;
    inset: 0;
    z-index: 999;
    background: rgba(0, 0, 0, 0.35);
    backdrop-filter: blur(2px);
}

.library__meta-popover {
    position: fixed;
    z-index: 1000;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: min(640px, calc(100vw - 3rem));
    height: min(520px, calc(100vh - 4rem));
    padding: 1.5rem;
    background: var(--color-surface, #fff);
    border: 1px solid var(--color-border);
    border-radius: 0.75rem;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15), 0 4px 16px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
}

.library__meta-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--color-border);
}

.library__meta-heading {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
}

.library__meta-close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: 0.375rem;
    color: var(--color-text-secondary);
    font-size: 1.25rem;
    line-height: 1;
    cursor: pointer;
    transition: all 0.15s;
}

.library__meta-close:hover {
    background: var(--color-bg);
    color: var(--color-text);
}

.library__meta-label {
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    flex-shrink: 0;
}

.library__meta-input,
.library__meta-textarea {
    width: 100%;
    padding: 0.5rem 0.625rem;
    font-size: 0.875rem;
    font-family: inherit;
    border: 1px solid var(--color-border);
    border-radius: 0.375rem;
    background: var(--color-bg, #f9fafb);
    color: var(--color-text);
    transition: border-color 0.15s;
    box-sizing: border-box;
    flex-shrink: 0;
}

.library__meta-textarea {
    flex: 1;
    flex-shrink: 1;
    min-height: 6rem;
    resize: none;
}

.library__meta-input:focus,
.library__meta-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.1);
}

.library__meta-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
    flex-shrink: 0;
    padding-top: 0.75rem;
    border-top: 1px solid var(--color-border);
}

.library__meta-btn {
    padding: 0.5rem 1.25rem;
    font-size: 0.8125rem;
    font-weight: 500;
    border-radius: 0.375rem;
    cursor: pointer;
    transition: all 0.15s;
    border: 1px solid transparent;
}

.library__meta-btn--save {
    background: var(--color-primary);
    color: white;
}

.library__meta-btn--save:hover {
    background: var(--color-primary-hover);
}

.library__meta-btn--save:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.library__meta-btn--cancel {
    background: transparent;
    color: var(--color-text-secondary);
    border-color: var(--color-border);
}

.library__meta-btn--cancel:hover {
    background: var(--color-bg);
    color: var(--color-text);
}

.library__actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.375rem;
}

.library__action-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    padding: 0;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: 0.375rem;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all 0.15s;
}

.library__action-btn:hover {
    background: var(--color-bg);
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-1px);
}

.library__action-btn--view:hover {
    background: #dbeafe;
    border-color: #3b82f6;
    color: #3b82f6;
}

.library__action-btn--info:hover {
    background: color-mix(in srgb, var(--color-primary) 6%, white);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.library__action-btn--download:hover {
    background: #d1fae5;
    border-color: #10b981;
    color: #10b981;
}

.library__action-btn--delete:hover {
    background: #fee2e2;
    border-color: var(--color-error);
    color: var(--color-error);
}

.library__action-btn:active {
    transform: translateY(0);
}

/* Full-width modifier for chat view */
.main--fullwidth {
    max-width: none;
    padding: 0;
    overflow: hidden;
}

.main--login-bg {
    max-width: none;
    padding: 0;
    overflow-y: auto;
    overflow-x: hidden;
}

/* ─── Chat layout ─────────────────────────────────────────────── */

.chat {
    display: grid;
    grid-template-columns: 1fr 20rem;
    gap: 0;
    height: 100%;
}

.chat__main {
    display: flex;
    flex-direction: column;
    background: var(--color-bg);
    overflow: hidden;
    min-width: 0;
    min-height: 0;
}

.chat--welcome-state .chat__main {
    justify-content: flex-start;
    padding-top: 2.25rem;
    overflow-y: auto;
}

.chat__messages {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem 1.5rem 1rem;
    scroll-behavior: smooth;
}

.chat--welcome-state .chat__messages {
    flex: 0 0 auto;
    overflow-y: visible;
    padding: 0 3rem 0;
}

.chat--welcome-state .chat__form {
    border-top: none;
    background: transparent;
}

/* ─── Disclaimer bar ──────────────────────────────────────────── */

.chat__disclaimer {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.7rem;
    color: var(--color-text-muted, #9ca3af);
    white-space: nowrap;
    margin-left: auto;
}

.chat__disclaimer svg {
    flex-shrink: 0;
    color: var(--color-text-muted, #9ca3af);
}

/* ─── Welcome state ───────────────────────────────────────────── */

.chat__welcome {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    text-align: left;
    padding: 0.5rem 0 0.75rem;
    animation: fadeInUp 0.4s ease-out;
    width: 100%;
    max-width: 45rem;
    margin: 0 auto;
    box-sizing: border-box;
}

.chat__welcome-icon {
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    background: var(--color-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0.625rem;
    box-shadow: 0 2px 8px rgba(44, 74, 110, 0.2);
}

.chat__welcome-icon svg {
    width: 20px;
    height: 20px;
}

.chat__welcome-title {
    font-family: var(--font-serif);
    font-size: 1.625rem;
    font-weight: 500;
    color: var(--color-primary);
    margin: 0 0 0.875rem;
    line-height: 1.2;
    letter-spacing: -0.005em;
}

.chat__welcome-subtitle {
    font-family: var(--font-sans, inherit);
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0 0 1rem;
    /* Admins can now enter multi-line subtitles; preserve line breaks
       while still collapsing runs of spaces like regular prose. */
    white-space: pre-line;
}

.chat__welcome-drawing {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.4rem 0.5rem;
    margin: 0.25rem 0 1rem;
}

.chat__welcome-drawing-label {
    font-family: var(--font-sans, inherit);
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    margin-right: 0.1rem;
}

.chat__welcome-drawing-chips {
    display: inline-flex;
    flex-wrap: wrap;
    gap: 0.375rem;
    align-items: center;
}

.tag-chip.chat__welcome-drawing-chip .chat__welcome-drawing-count {
    font-weight: 700;
}

.tag-chip.chat__welcome-drawing-chip .chat__welcome-drawing-name {
    font-weight: 400;
}

.chat__suggestions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    max-width: 36rem;
}

.chat__suggestion {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-family: var(--font-sans);
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.chat__suggestion:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: color-mix(in srgb, var(--color-primary) 4%, white);
}

.chat__suggestion svg {
    flex-shrink: 0;
    opacity: 0.6;
}

.chat__suggestion:hover svg {
    opacity: 1;
}

/* ─── Input area ──────────────────────────────────────────────── */

.chat__form {
    position: relative;
    padding: 0.75rem 1.5rem 0.875rem;
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    gap: 0.375rem;
    border-top: 1px solid var(--color-border);
    background: var(--color-surface);
}

.chat--welcome-state .chat__form {
    max-width: 45rem;
    margin: 0 auto;
    padding: 0.25rem 0 0.875rem;
    background: transparent;
    border-top: none;
    width: 100%;
    box-sizing: border-box;
}

.chat__input-wrapper {
    display: flex;
    align-items: center;
    gap: 0;
    background: var(--color-surface);
    border: 1px solid var(--color-primary);
    border-radius: 0.75rem;
    padding: 0.25rem 0.25rem 0.25rem 0.875rem;
    box-shadow: 0 0 0 4px rgba(44, 74, 110, 0.06);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.chat__input-wrapper:focus-within {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(44, 74, 110, 0.12);
    background: var(--color-surface);
}

.chat__input {
    flex: 1;
    min-width: 0;
    padding: 0.4375rem 0;
    border: none;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    resize: none;
    outline: none;
    background: transparent;
    color: var(--color-text);
    line-height: 1.5;
    max-height: 12.5rem;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat__input::placeholder {
    color: var(--color-text-secondary);
    opacity: 0.55;
}

.chat__char-counter {
    font-size: 0.7rem;
    color: var(--color-text-secondary);
    white-space: nowrap;
    padding: 0 0.375rem;
    flex-shrink: 0;
    opacity: 0.7;
    transition: color 0.2s, opacity 0.2s;
}

.chat__char-counter--warn {
    color: #d97706;
    opacity: 1;
}

.chat__char-counter--limit {
    color: #dc2626;
    font-weight: 600;
    opacity: 1;
}

.chat__send-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 3.5rem;
    height: 2.125rem;
    padding: 0 0.875rem;
    border: none;
    border-radius: var(--radius);
    background: var(--color-primary);
    color: white;
    font-family: var(--font-sans);
    font-size: 0.8125rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
    flex-shrink: 0;
}

.chat__send-btn:hover:not(:disabled) {
    background: var(--color-primary-hover);
}

.chat__send-btn:active:not(:disabled) {
    transform: scale(0.95);
}

.chat__send-btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

.chat__model-select {
    appearance: none;
    -webkit-appearance: none;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 0.25rem 1.25rem 0.25rem 0.5rem;
    font-family: var(--font-sans);
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    cursor: pointer;
    outline: none;
    flex-shrink: 0;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 24 24' fill='none' stroke='%235c6370' stroke-width='2.5'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.25rem center;
    transition: border-color 0.15s, color 0.15s;
}

.chat__model-select:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.chat__model-select:focus {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.chat__hints-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.3125rem;
    padding: 0.25rem 0.625rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-family: var(--font-sans);
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    cursor: pointer;
    outline: none;
    flex-shrink: 0;
    letter-spacing: 0.03em;
    transition: border-color 0.15s, color 0.15s, background 0.15s;
    white-space: nowrap;
}

.chat__hints-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.chat__hints-btn--active {
    background: color-mix(in srgb, var(--color-primary) 10%, var(--color-surface));
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.chat__hints-btn svg {
    flex-shrink: 0;
}

.chat__input-divider {
    width: 1px;
    height: 1.25rem;
    background: var(--color-border);
    flex-shrink: 0;
    margin: 0 0.125rem;
}

.chat__form-hint {
    font-size: 0.6875rem;
    color: var(--color-text-secondary);
    opacity: 0.45;
    text-align: center;
    letter-spacing: 0.01em;
}

/* ─── Messages ────────────────────────────────────────────────── */

.message {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    max-width: 48rem;
    animation: fadeIn 0.3s ease-out;
}

.message--user {
    margin-left: auto;
    flex-direction: row-reverse;
}

.message__avatar {
    width: 1.75rem;
    height: 1.75rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-top: 0.25rem;
    font-size: 0.625rem;
}

.message__avatar--user {
    background: var(--color-primary);
    color: white;
}

.message__avatar--assistant {
    background: var(--color-accent);
    color: white;
}

.message__content {
    min-width: 0;
    max-width: calc(100% - 3rem);
}

.message__role {
    font-size: 0.625rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-text-secondary);
    margin-bottom: 0.25rem;
}

.message--user .message__role {
    text-align: right;
}

.message__bubble {
    display: inline-block;
    max-width: 100%;
    padding: 0.875rem 1.125rem;
    border-radius: var(--radius);
    text-align: left;
    font-size: 0.875rem;
    line-height: 1.75;
    word-break: break-word;
}

.message--user .message__bubble {
    background: var(--color-primary);
    color: white;
    border-bottom-right-radius: 2px;
}

.message--assistant .message__bubble {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-bottom-left-radius: 2px;
    box-shadow: var(--shadow);
}

.message__bubble pre,
.history__detail-text pre {
    overflow-x: auto;
    max-width: 100%;
}

.message__bubble code,
.history__detail-text code {
    word-break: break-all;
}

.message__bubble pre code,
.history__detail-text pre code {
    word-break: normal;
}

.message__copy-wrapper {
    margin-top: 0.5rem;
    display: flex;
    justify-content: flex-start;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.message__copy-btn-bottom {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.75rem;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.message__copy-btn-bottom:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.message__copy-btn-bottom:active {
    transform: translateY(0);
}

.message__copy-btn-bottom--copied {
    background: var(--color-success);
    color: white;
    border-color: var(--color-success);
}

.message__share-btn,
.message__email-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.75rem;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.message__share-btn:hover,
.message__email-btn:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.message__share-btn:active,
.message__email-btn:active {
    transform: translateY(0);
}

.message__share-btn--copied {
    background: var(--color-success);
    color: white;
    border-color: var(--color-success);
}

.message__latex-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.75rem;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.message__latex-btn:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.message__latex-btn:active {
    transform: translateY(0);
}

.message__latex-btn--copied {
    background: var(--color-success);
    color: white;
    border-color: var(--color-success);
}

.message--assistant .message__bubble h2,
.message--assistant .message__bubble h3,
.message--assistant .message__bubble h4 {
    font-family: var(--font-serif);
    margin: 1rem 0 0.375rem;
    line-height: 1.35;
    font-weight: 600;
}

.message--assistant .message__bubble h2:first-child,
.message--assistant .message__bubble h3:first-child,
.message--assistant .message__bubble h4:first-child {
    margin-top: 0;
}

.message--assistant .message__bubble h2 { font-size: 1.0625rem; }
.message--assistant .message__bubble h3 { font-size: 0.9375rem; }
.message--assistant .message__bubble h4 { font-size: 0.875rem; font-style: italic; }

.message--assistant .message__bubble p {
    margin: 0.5rem 0;
}

.message--assistant .message__bubble ul,
.message--assistant .message__bubble ol {
    margin: 0.5rem 0;
    padding-left: 1.5rem;
}

.message--assistant .message__bubble li {
    margin-bottom: 0.375rem;
}

.message__timing {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    margin-top: 0.5rem;
    font-size: 0.6875rem;
    color: var(--color-text-secondary);
    opacity: 0.75;
}

.message__timing svg {
    flex-shrink: 0;
}

.message__routing-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    margin-top: 0.35rem;
    font-size: 0.6875rem;
    color: var(--color-primary);
    opacity: 0.8;
    cursor: default;
    background: rgba(44, 74, 110, 0.06);
    padding: 0.15rem 0.5rem;
    border-radius: 10px;
}

.message__routing-badge svg {
    flex-shrink: 0;
}

.message__routing-label {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.message__routing-inspect {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    padding: 0;
    margin-left: 0.125rem;
    cursor: pointer;
    color: var(--color-primary);
    opacity: 0.5;
    transition: opacity 0.15s;
    border-radius: 50%;
}

.message__routing-inspect:hover {
    opacity: 1;
}

/* ─── Guiding Principle inspect modal ────────────────────────── */

.gp-inspect-modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 2000;
    background: rgba(0, 0, 0, 0.45);
}

.gp-inspect-modal--open {
    display: flex;
    align-items: center;
    justify-content: center;
}

.gp-inspect-modal__content {
    background: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    width: min(640px, 90vw);
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.gp-inspect-modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--color-border);
}

.gp-inspect-modal__title {
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--color-text);
}

.gp-inspect-modal__close {
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.25rem;
    border-radius: var(--radius);
    color: var(--color-text-secondary);
    transition: background 0.15s, color 0.15s;
}

.gp-inspect-modal__close:hover {
    background: var(--color-bg);
    color: var(--color-text);
}

.gp-inspect-modal__meta {
    padding: 0.75rem 1.25rem;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.gp-inspect-modal__meta-row strong {
    color: var(--color-text);
}

.gp-inspect-modal__score {
    display: inline-block;
    padding: 0.0625rem 0.375rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    margin-right: 0.25rem;
    background: rgba(0, 0, 0, 0.05);
    color: var(--color-text-secondary);
}

.gp-inspect-modal__score--selected {
    background: rgba(44, 74, 110, 0.1);
    color: var(--color-primary);
    font-weight: 600;
}

.gp-inspect-modal__body {
    flex: 1;
    overflow-y: auto;
    padding: 1.25rem;
    margin: 0;
    font-family: 'SFMono-Regular', 'Consolas', 'Liberation Mono', 'Menlo', monospace;
    font-size: 0.8125rem;
    line-height: 1.65;
    color: var(--color-text);
    white-space: pre-wrap;
    word-break: break-word;
    background: var(--color-surface);
}

.message__sources {
    margin-top: 0.75rem;
    padding-top: 0.625rem;
    border-top: 1px solid var(--color-border);
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    padding-left: 0;
}

.message__source {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    background: #f9f7f4;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 0.1875rem 0.625rem;
    margin: 0.1875rem 0.125rem;
    font-size: 0.6875rem;
    font-weight: 500;
    transition: all 0.15s;
}

/* ─── Report download button ─────────────────────────────────── */

.message__download {
    margin-top: 0.75rem;
}

.message__download-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.125rem;
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius);
    font-family: var(--font-sans);
    font-size: 0.8125rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: var(--shadow);
}

.message__download-btn:hover {
    background: var(--color-primary-hover);
    color: white;
}

.message__download-btn:active {
    transform: translateY(0);
}

.message__download-btn svg {
    flex-shrink: 0;
}

/* ─── Sidebar hidden (admin setting) ───────────────────────────── */

.chat--sidebar-hidden {
    grid-template-columns: 1fr;
}

/* ─── Viewer panel ─────────────────────────────────────────────── */

.chat--viewer-open {
    grid-template-columns: minmax(22rem, 32rem) 1fr;
}

.chat--viewer-open .chat__sidebar {
    display: none;
}

.chat__viewer {
    display: none;
    flex-direction: column;
    background: var(--color-surface);
    overflow: hidden;
    border-left: 1px solid var(--color-border);
    animation: slideInRight 0.25s ease-out;
}

.chat--viewer-open .chat__viewer {
    display: flex;
}

.chat__viewer-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1rem;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-surface);
    min-height: 2.75rem;
}

.chat__viewer-icon {
    color: var(--color-primary);
    flex-shrink: 0;
}

.chat__viewer-filename {
    font-size: 0.8125rem;
    font-weight: 600;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
    min-width: 0;
}

.chat__viewer-page {
    font-size: 0.6875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    white-space: nowrap;
    flex-shrink: 0;
    background: var(--color-bg);
    padding: 0.125rem 0.5rem;
    border-radius: 1rem;
}

.chat__viewer-close {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    padding: 0.25rem 0.375rem;
    line-height: 1;
    border-radius: 0.375rem;
    flex-shrink: 0;
    transition: all 0.15s;
}

.chat__viewer-close:hover {
    background: var(--color-error);
    color: white;
}

.chat__viewer-content {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    background: #1a1a2e;
    min-height: 0;
}

.chat__viewer-content canvas {
    display: block;
    margin: 0 auto;
    max-width: 100%;
    height: auto;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
    border-radius: 4px;
}

.chat__viewer-status {
    padding: 0.75rem;
    font-size: 0.8125rem;
    text-align: center;
    color: #999;
}

.chat__viewer-snippet {
    font-size: 0.75rem;
    line-height: 1.5;
    padding: 0.625rem 1rem;
    background: #fffbeb;
    border-top: 1px solid #fde68a;
    border-left: 3px solid #f59e0b;
    color: #92400e;
    max-height: 5rem;
    overflow-y: auto;
}

.chat__viewer-snippet:empty {
    display: none;
}

/* ─── Clickable source badges ──────────────────────────────────── */

.message__source--clickable {
    cursor: pointer;
    transition: all 0.15s;
}

.message__source--clickable:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: color-mix(in srgb, var(--color-primary) 6%, white);
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(44, 74, 110, 0.15);
}

.message__source--clickable:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 1px;
}

.message__source--active {
    border-color: var(--color-primary);
    background: var(--color-primary);
    color: white;
    box-shadow: 0 2px 8px rgba(44, 74, 110, 0.3);
}

/* ─── Inline [Source N] links ──────────────────────────────────── */

.source-ref {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    cursor: pointer;
    border-bottom: 1px dashed var(--color-primary);
    padding: 0 0.125rem;
    border-radius: 2px;
    transition: background 0.15s, color 0.15s;
}

.source-ref:hover {
    background: var(--color-primary);
    color: white;
    border-bottom-color: transparent;
}

.source-ref:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 1px;
}

/* ─── Sidebar ─────────────────────────────────────────────────── */

.chat__sidebar {
    background: var(--color-surface);
    border-left: 1px solid var(--color-border);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.chat__sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.875rem 1rem 0.625rem;
    border-bottom: 1px solid var(--color-border);
}

.chat__sidebar-title {
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.chat__sidebar-title svg {
    opacity: 0.5;
}

.chat__sidebar-count {
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--color-primary);
    background: color-mix(in srgb, var(--color-primary) 6%, white);
    padding: 0.0625rem 0.5rem;
    border-radius: 1rem;
    min-width: 1.25rem;
    text-align: center;
}

.chat__sidebar-count:empty {
    display: none;
}

.chat__sidebar-controls {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid var(--color-border);
    background: #fafafa;
}

.chat__author-multiselect {
    flex: 1;
    min-width: 0;
    position: relative;
}

.chat__author-multiselect-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    font-size: 0.6875rem;
    padding: 0.3rem 0.5rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
    color: var(--color-text);
    cursor: pointer;
    text-align: left;
    gap: 0.25rem;
}

.chat__author-multiselect-toggle:hover {
    border-color: var(--color-primary);
}

.chat__author-multiselect--open .chat__author-multiselect-toggle {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(44, 74, 110, 0.15);
}

.chat__author-multiselect-label {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
    min-width: 0;
}

.chat__author-multiselect-chevron {
    flex-shrink: 0;
    transition: transform 0.2s;
    opacity: 0.5;
}

.chat__author-multiselect--open .chat__author-multiselect-chevron {
    transform: rotate(180deg);
}

.chat__author-dropdown {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    right: 0;
    min-width: 200px;
    max-height: 280px;
    display: flex;
    flex-direction: column;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
    z-index: 50;
    overflow: hidden;
}

.chat__author-dropdown-actions {
    display: flex;
    gap: 0.25rem;
    padding: 0.375rem 0.5rem;
    border-bottom: 1px solid var(--color-border);
    background: #fafafa;
}

.chat__author-action-btn {
    flex: 1;
    font-size: 0.625rem;
    font-weight: 500;
    padding: 0.2rem 0.375rem;
    border: 1px solid var(--color-border);
    border-radius: 3px;
    background: var(--color-surface);
    color: var(--color-primary);
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
}

.chat__author-action-btn:hover {
    background: color-mix(in srgb, var(--color-primary) 6%, white);
    border-color: var(--color-primary);
}

.chat__author-dropdown-list {
    overflow-y: auto;
    flex: 1;
    padding: 0.25rem 0;
}

.chat__author-dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.3rem 0.5rem;
    cursor: pointer;
    font-size: 0.6875rem;
    color: var(--color-text);
    transition: background 0.1s;
}

.chat__author-dropdown-item:hover {
    background: color-mix(in srgb, var(--color-primary) 5%, white);
}

.chat__author-checkbox {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
    cursor: pointer;
    accent-color: var(--color-primary);
}

.chat__author-dropdown-name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
    min-width: 0;
}

.chat__author-dropdown-count {
    flex-shrink: 0;
    font-size: 0.6rem;
    font-weight: 600;
    min-width: 18px;
    height: 18px;
    line-height: 18px;
    text-align: center;
    border-radius: 9px;
    background: color-mix(in srgb, var(--color-primary) 10%, white);
    color: var(--color-primary);
}

.chat__select-all-btn {
    flex-shrink: 0;
    font-size: 0.6875rem;
    font-weight: 500;
    padding: 0.3rem 0.625rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
    color: var(--color-primary);
    cursor: pointer;
    white-space: nowrap;
    transition: background 0.15s, border-color 0.15s;
}

.chat__select-all-btn:hover {
    background: color-mix(in srgb, var(--color-primary) 6%, white);
    border-color: var(--color-primary);
}

.chat__doc-list {
    flex: 1;
    overflow-y: auto;
    padding: 0.5rem;
}

.chat__doc-loading {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem;
    font-size: 0.75rem;
    color: var(--color-text-secondary);
}

.chat__doc-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.375rem;
    padding: 2rem 1rem;
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 0.75rem;
}

.chat__doc-upload-link {
    font-size: 0.75rem;
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
}

.chat__doc-upload-link:hover {
    text-decoration: underline;
}

.chat__doc-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    padding: 0.4375rem 0.5rem;
    border-radius: 0.375rem;
    font-size: 0.8125rem;
    margin-bottom: 0.125rem;
    transition: background 0.1s;
}

.chat__doc-item:hover {
    background: var(--color-bg);
}

.chat__doc-item-label {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    flex: 1;
    min-width: 0;
    cursor: pointer;
}

.chat__doc-item input[type="checkbox"] {
    accent-color: var(--color-primary);
    width: 0.875rem;
    height: 0.875rem;
    flex-shrink: 0;
    margin-top: 0.125rem;
}

.chat__doc-text {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    flex: 1;
    min-width: 0;
}

.chat__doc-view-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 1.5rem;
    height: 1.5rem;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: 0.25rem;
    color: var(--color-text-secondary);
    cursor: pointer;
    flex-shrink: 0;
    opacity: 0;
    transition: all 0.15s;
}

.chat__doc-item:hover .chat__doc-view-btn {
    opacity: 1;
}

.chat__doc-view-btn:hover {
    background: var(--color-primary);
    color: white;
    transform: scale(1.1);
}

.chat__doc-view-btn:active {
    transform: scale(0.95);
}

.chat__doc-icon {
    color: var(--color-text-secondary);
    opacity: 0.5;
    flex-shrink: 0;
}

.chat__doc-name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    min-width: 0;
}

.chat__doc-name--hoverable {
    cursor: help;
    text-decoration: underline;
    text-decoration-style: dotted;
    text-decoration-color: var(--color-primary);
    text-underline-offset: 2px;
    text-decoration-thickness: 1px;
}

.chat__doc-summary {
    font-size: 0.6875rem;
    line-height: 1.3;
    color: var(--color-text-secondary);
    opacity: 0.8;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    word-break: break-word;
}

/* Document card layout */
.chat__doc-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 0.5rem;
    padding: 0.625rem 0.625rem 0.5rem;
    margin-bottom: 0.375rem;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.chat__doc-card:hover {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 1px rgba(124, 58, 237, 0.08);
}

.chat__doc-card-header {
    display: flex;
    align-items: flex-start;
    gap: 0.375rem;
}

.chat__doc-card-check {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    padding-top: 0.125rem;
    cursor: pointer;
}

.chat__doc-card-check input[type="checkbox"] {
    accent-color: var(--color-primary);
    width: 0.875rem;
    height: 0.875rem;
}

/* When the Peer-reviewed toggle is on, non-peer-reviewed doc cards lock:
 * the card dims and the checkbox is disabled so the user cannot re-include
 * them in a peer-reviewed-only query. Toggling the switch off restores the
 * previous selection state. */
.chat__doc-card--pr-disabled {
    opacity: 0.55;
}

.chat__doc-card--pr-disabled .chat__doc-card-check,
.chat__doc-card--pr-disabled .chat__doc-card-check input[type="checkbox"] {
    cursor: not-allowed;
}

.chat__doc-card--pr-disabled .chat__doc-card-check input[type="checkbox"]:disabled {
    accent-color: var(--color-text-secondary, #6b7280);
}

.chat__doc-card--pr-disabled:hover {
    border-color: var(--color-border);
    box-shadow: none;
}

.chat__doc-card-title-area {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
}

.chat__doc-card-title {
    font-size: 0.8125rem;
    font-weight: 600;
    line-height: 1.35;
    color: var(--color-text);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    word-break: break-word;
}

.chat__doc-card-filename {
    font-size: 0.6875rem;
    color: var(--color-text-secondary);
    opacity: 0.7;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.chat__doc-card-desc {
    font-size: 0.75rem;
    line-height: 1.45;
    color: var(--color-text-secondary);
    margin: 0.375rem 0 0;
    padding: 0;
    display: -webkit-box;
    -webkit-line-clamp: 6;
    -webkit-box-orient: vertical;
    overflow: hidden;
    word-break: break-word;
}

.chat__doc-card-authors {
    font-size: 0.6875rem;
    line-height: 1.3;
    color: var(--color-accent);
    margin: 0.25rem 0 0;
    padding: 0;
    display: flex;
    align-items: baseline;
    gap: 0.25rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-weight: 500;
}

.chat__doc-card-authors svg {
    flex-shrink: 0;
    position: relative;
    top: 1px;
    opacity: 0.7;
    stroke: var(--color-accent);
}

.chat__doc-card-peer-reviewed {
    font-size: 0.6rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    color: #059669;
    margin: 0.2rem 0 0;
    padding: 0;
    text-transform: uppercase;
}

.chat__doc-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.375rem;
    padding-top: 0.375rem;
    border-top: 1px solid var(--color-border);
}

.chat__doc-card-meta-item {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.625rem;
    color: var(--color-text-secondary);
    opacity: 0.75;
}

.chat__doc-card-meta-item svg {
    opacity: 0.6;
    flex-shrink: 0;
}

.chat__doc-card .chat__doc-view-btn,
.chat__doc-card .chat__doc-download-btn {
    opacity: 0;
    flex-shrink: 0;
}

.chat__doc-card .chat__doc-download-btn {
    margin-left: auto;
}

.chat__doc-card:hover .chat__doc-view-btn,
.chat__doc-card:hover .chat__doc-download-btn {
    opacity: 1;
}

.chat__doc-download-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 1.5rem;
    height: 1.5rem;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: 0.25rem;
    color: var(--color-text-secondary);
    cursor: pointer;
    flex-shrink: 0;
    transition: all 0.15s;
}

.chat__doc-download-btn:hover {
    background: #059669;
    color: white;
    transform: scale(1.1);
}

/* Document detail view */
.doc-detail {
    max-width: 48rem;
    margin: 0 auto;
}

.doc-detail__header {
    margin-bottom: 1.5rem;
}

.doc-detail__title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.doc-detail__meta {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.doc-detail__actions {
    margin: 1.5rem 0;
    display: flex;
    gap: 0.75rem;
}

.doc-detail__chunks {
    margin-top: 1.5rem;
}

.doc-detail__chunk {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1rem;
    margin-bottom: 0.75rem;
}

.doc-detail__chunk-header {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.doc-detail__chunk-text {
    font-size: 0.8125rem;
    line-height: 1.6;
    white-space: pre-wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: var(--radius);
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s, opacity 0.15s;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn--primary {
    background: var(--color-primary);
    color: white;
}

.btn--primary:hover:not(:disabled) {
    background: var(--color-primary-hover);
}

.btn--danger {
    background: var(--color-error);
    color: white;
}

.btn--danger:hover:not(:disabled) {
    background: #dc2626;
}

.btn--ghost {
    background: transparent;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
}

.btn--ghost:hover:not(:disabled) {
    background: var(--color-bg);
}

.btn--danger {
    background: #dc2626;
    color: white;
    border: 1px solid #dc2626;
}

.btn--danger:hover:not(:disabled) {
    background: #b91c1c;
    border-color: #b91c1c;
}

.btn--icon {
    background: transparent;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    padding: 0.5rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn--icon:hover:not(:disabled) {
    background: var(--color-bg);
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn--small {
    padding: 0.375rem 0.75rem;
    font-size: 0.8125rem;
}

/* PDF Viewer Modal */
.pdf-viewer-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    animation: fadeIn 0.2s ease-out;
}

.pdf-viewer-modal--open {
    display: flex;
    align-items: center;
    justify-content: center;
}

.pdf-viewer-modal__content {
    background: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    width: 90vw;
    height: 90vh;
    max-width: 1200px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: slideUp 0.3s ease-out;
}

.pdf-viewer-modal__header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-surface);
}

.pdf-viewer-modal__title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
    min-width: 0;
}

.pdf-viewer-modal__header-actions {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.pdf-viewer-modal__download {
    background: transparent;
    border: none;
    color: var(--color-text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
    transition: background 0.15s, color 0.15s;
}

.pdf-viewer-modal__download:hover {
    background: #059669;
    color: white;
}

.pdf-viewer-modal__close {
    background: transparent;
    border: none;
    color: var(--color-text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
    transition: background 0.15s, color 0.15s;
}

.pdf-viewer-modal__close:hover {
    background: var(--color-bg);
    color: var(--color-text);
}

.pdf-viewer-modal__iframe {
    flex: 1;
    border: none;
    width: 100%;
    height: 100%;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* PDF Preview Popup */
.pdf-preview-popup {
    position: fixed;
    z-index: 999;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    padding: 0.5rem;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, visibility 0.2s;
    pointer-events: none;
    max-width: 300px;
}

.pdf-preview-popup--visible {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.pdf-preview-popup canvas {
    display: block;
    width: 100%;
    height: auto;
    border-radius: calc(var(--radius) - 0.25rem);
}


/* Spinner */
.spinner {
    display: inline-block;
    width: 1rem;
    height: 1rem;
    border: 2px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ─── Animations ──────────────────────────────────────────────── */

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(1rem); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(1rem); }
    to { opacity: 1; transform: translateX(0); }
}

/* ─── Custom scrollbar ────────────────────────────────────────── */

.chat__messages::-webkit-scrollbar,
.chat__doc-list::-webkit-scrollbar,
.chat__viewer-content::-webkit-scrollbar {
    width: 6px;
}

.chat__messages::-webkit-scrollbar-track,
.chat__doc-list::-webkit-scrollbar-track {
    background: transparent;
}

.chat__messages::-webkit-scrollbar-thumb,
.chat__doc-list::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 3px;
}

.chat__messages::-webkit-scrollbar-thumb:hover,
.chat__doc-list::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-secondary);
}

.chat__viewer-content::-webkit-scrollbar-track {
    background: #111;
}

.chat__viewer-content::-webkit-scrollbar-thumb {
    background: #444;
    border-radius: 3px;
}

/* ─── Responsive ──────────────────────────────────────────────── */

@media (max-width: 64rem) {
    .chat--viewer-open {
        grid-template-columns: minmax(18rem, 24rem) 1fr;
    }

    .chat__welcome-title {
        font-size: 1.25rem;
    }

    .chat__suggestions {
        flex-direction: column;
        align-items: center;
    }
}

/* ─── Feedback nav button ────────────────────────────────────── */

.nav__feedback {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.125rem 0.75rem;
    background: #e6edfb;
    border: 1px solid transparent;
    border-radius: 999px;
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 400;
    letter-spacing: 0;
    color: #0f3d8a;
    cursor: pointer;
    white-space: nowrap;
    line-height: 1.2;
    transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.nav__feedback:hover {
    background: #d8e3f7;
    color: #0b2f6b;
}

.nav__feedback-icon,
.nav__feedback svg {
    width: 12px;
    height: 12px;
    flex-shrink: 0;
    color: currentColor;
}

/* ─── Feedback modal ─────────────────────────────────────────── */

.feedback-modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.feedback-modal--open {
    display: flex;
}

.feedback-modal__overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
}

.feedback-modal__content {
    position: relative;
    width: 90%;
    max-width: 520px;
    background: var(--color-surface, #fff);
    border-radius: 0.75rem;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
    overflow: hidden;
    animation: feedbackModalIn 0.2s ease-out;
}

@keyframes feedbackModalIn {
    from { opacity: 0; transform: translateY(10px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.feedback-modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--color-border, #e5e7eb);
}

.feedback-modal__title {
    font-family: var(--font-sans);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text, #1f2937);
    margin: 0;
}

.feedback-modal__close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    background: transparent;
    border: none;
    border-radius: 0.375rem;
    color: var(--color-text-secondary, #6b7280);
    cursor: pointer;
    transition: background 0.15s;
}

.feedback-modal__close:hover {
    background: var(--color-bg-hover, #f3f4f6);
}

.feedback-modal__body {
    padding: 1.5rem;
}

.feedback-modal__label {
    display: block;
    font-family: var(--font-sans);
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-text-secondary, #6b7280);
    margin-bottom: 0.5rem;
}

.feedback-modal__textarea {
    width: 100%;
    min-height: 120px;
    padding: 0.75rem;
    background: var(--color-bg, #f9fafb);
    border: 1px solid var(--color-border, #e5e7eb);
    border-radius: 0.5rem;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    color: var(--color-text, #1f2937);
    resize: vertical;
    transition: border-color 0.15s;
    box-sizing: border-box;
}

.feedback-modal__textarea:focus {
    outline: none;
    border-color: var(--color-primary, #3a6a8a);
    box-shadow: 0 0 0 3px rgba(58, 106, 138, 0.1);
}

.feedback-modal__char-count {
    text-align: right;
    font-size: 0.75rem;
    color: var(--color-text-secondary, #9ca3af);
    margin-top: 0.25rem;
}

.feedback-modal__checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
    font-family: var(--font-sans);
    font-size: 0.8125rem;
    color: var(--color-text-secondary, #6b7280);
    cursor: pointer;
}

.feedback-modal__checkbox {
    width: 1rem;
    height: 1rem;
    accent-color: var(--color-primary, #3a6a8a);
    cursor: pointer;
}

.feedback-modal__footer {
    padding: 1rem 1.5rem 1.25rem;
    border-top: 1px solid var(--color-border, #e5e7eb);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 1rem;
}

.feedback-modal__submit {
    flex-shrink: 0;
}

.feedback-modal__status {
    font-size: 0.8125rem;
    font-family: var(--font-sans);
}

.feedback-modal__status--success {
    color: var(--color-success, #059669);
}

.feedback-modal__status--error {
    color: var(--color-error, #dc2626);
}

/* ─── Feedback table in analytics ────────────────────────────── */

.feedback-table__col--date { width: 110px; }
.feedback-table__col--email { width: 180px; }
.feedback-table__col--message { }
.feedback-table__col--contact { width: 70px; text-align: center; }
.feedback-table__col--actions { width: 80px; text-align: right; }

.feedback-table__date {
    white-space: nowrap;
}

.feedback-table__date-primary {
    display: block;
    font-size: 0.8125rem;
    font-weight: 500;
}

.feedback-table__date-secondary {
    display: block;
    font-size: 0.75rem;
    color: var(--color-text-secondary, #9ca3af);
}

.feedback-table__message {
    max-width: 400px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-size: 0.8125rem;
}

.feedback-table__row {
    cursor: pointer;
    transition: background-color 0.15s;
}

.feedback-table__row:hover {
    background-color: rgba(44, 74, 110, 0.04);
}

.feedback-table__detail-row td {
    padding: 0 !important;
}

.feedback-table__detail-content {
    padding: 1rem 1.25rem;
    background: var(--color-bg, #f9fafb);
    border-top: 1px solid var(--color-border, #e5e7eb);
    font-size: 0.8125rem;
    line-height: 1.6;
    color: var(--color-text, #374151);
    white-space: pre-wrap;
    word-break: break-word;
}

.feedback-table__actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.25rem;
}

.feedback-table__expand-btn,
.feedback-table__delete-btn {
    padding: 0.35rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.375rem;
    flex-shrink: 0;
}

/* ─── Analytics pagination ───────────────────────────────────── */

.analytics__pagination {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 0;
    justify-content: center;
}

.analytics__pagination-info {
    font-size: 0.8125rem;
    color: var(--color-text-secondary, #6b7280);
}

/* ─── Logout button ───────────────────────────────────────────── */

.nav__logout {
    display: inline-flex;
    align-items: center;
    padding: 0.4375rem 0.5rem;
    background: transparent;
    border: none;
    border-radius: var(--radius);
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: color 0.15s;
    flex-shrink: 0;
}

/* ─── Admin "view as user" toggle ────────────────────────────── */

.nav__view-as {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.25rem 0.75rem;
    background: var(--color-accent-light);
    border: 1px solid color-mix(in srgb, var(--color-accent) 30%, transparent);
    border-radius: 999px;
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-accent);
    cursor: pointer;
    white-space: nowrap;
    line-height: 1.2;
    transition: background 0.15s, color 0.15s, border-color 0.15s;
    flex-shrink: 0;
}

.nav__view-as:hover {
    background: color-mix(in srgb, var(--color-accent) 15%, white);
    border-color: var(--color-accent);
}

.nav__view-as:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.nav__view-as--active {
    background: var(--color-accent);
    color: #fff;
    border-color: var(--color-accent);
}

.nav__view-as--active:hover {
    background: color-mix(in srgb, var(--color-accent) 85%, black);
    color: #fff;
}

.nav__view-as svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

/* Impersonation banner that sits directly under the nav while an admin
   is viewing the app as a regular user. */
.view-as-banner {
    flex-shrink: 0;
    z-index: 99;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    padding: 0.5rem 1rem;
    background: color-mix(in srgb, var(--color-accent) 12%, white);
    border-bottom: 1px solid color-mix(in srgb, var(--color-accent) 35%, transparent);
    color: color-mix(in srgb, var(--color-accent) 70%, black);
    font-size: 0.8125rem;
    font-weight: 500;
}

.view-as-banner__text {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.view-as-banner__text svg {
    flex-shrink: 0;
}

.view-as-banner__exit {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    background: var(--color-accent);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s;
}

.view-as-banner__exit:hover {
    background: color-mix(in srgb, var(--color-accent) 85%, black);
}

@media (max-width: 32rem) {
    .nav__view-as span {
        display: none;
    }
    .nav__view-as {
        padding: 0.25rem 0.5rem;
    }
    .view-as-banner {
        font-size: 0.75rem;
        padding: 0.375rem 0.75rem;
    }
}

.nav__logout:hover {
    background: transparent;
    color: var(--color-text);
}

.nav__logout svg {
    display: none;
}

/* ─── Login page ──────────────────────────────────────────────── */

.login {
    min-height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
    background: var(--color-bg);
}

.login--with-bg {
    width: 100%;
    min-height: 100%;
    position: relative;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    box-sizing: border-box;
}

.login--with-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.35);
    z-index: 0;
}

.login--with-bg > .login__card {
    position: relative;
    z-index: 1;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

@media (prefers-color-scheme: dark) {
    .login--with-bg > .login__card {
        background: rgba(30, 30, 35, 0.92);
    }
}

.login__card {
    width: 100%;
    max-width: 22rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 1rem;
    padding: 1.75rem 1.75rem;
    box-shadow: var(--shadow-lg);
    animation: fadeInUp 0.3s ease-out;
}

.login__header {
    text-align: center;
    margin-bottom: 1.25rem;
}

.login__logo {
    width: 3.5rem;
    height: 3.5rem;
    object-fit: contain;
    margin-bottom: 0.625rem;
}

.login__logo--custom {
    width: auto;
    height: auto;
    max-width: 14rem;
    max-height: 4.5rem;
}

.login__title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 0.125rem;
}

.login__subtitle {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

.login__form {
    display: flex;
    flex-direction: column;
    gap: 0.875rem;
}

.login__field {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.login__label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-text);
}

.login__input {
    padding: 0.5rem 0.75rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    font-family: var(--font-sans);
    font-size: 0.875rem;
    color: var(--color-text);
    background: var(--color-surface);
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
}

.login__input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(44, 74, 110, 0.1);
}

.login__input::placeholder {
    color: var(--color-text-secondary);
    opacity: 0.6;
}

.login__error {
    padding: 0.625rem 0.875rem;
    background: #fee2e2;
    border: 1px solid #fca5a5;
    border-radius: var(--radius);
    font-size: 0.8125rem;
    color: #991b1b;
}

.login__btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem;
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius);
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
}

.login__btn:hover:not(:disabled) {
    background: var(--color-primary-hover);
}

.login__btn:active:not(:disabled) {
    transform: scale(0.98);
}

.login__btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.login__footer {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.login__toggle {
    background: none;
    border: none;
    color: var(--color-primary);
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    transition: opacity 0.15s;
}

.login__toggle:hover {
    opacity: 0.7;
}

.login__toggle:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.login__email-sent {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    margin-top: 0.5rem;
}

/* ---- Google SSO button ------------------------------------------------ */
/* Official Google sign-in guidance: white background, 1px #747775 border,
   Roboto / system font, min 44px tap target. Keeps the look neutral so it
   sits on top of the (often branded) coloured login background. */
.login__sso-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.5rem 0.875rem;
    margin-bottom: 0.5rem;
    background: #ffffff;
    color: #1f1f1f;
    border: 1px solid #747775;
    border-radius: 0.375rem;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.login__sso-btn:hover {
    background: #f8f9fa;
    box-shadow: 0 1px 2px rgba(60, 64, 67, 0.15);
}

.login__sso-btn:active {
    background: #f1f3f4;
    transform: scale(0.99);
}

.login__sso-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.login__sso-icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.login__divider {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 0.25rem 0 0.625rem;
    color: var(--color-text-secondary);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.login__divider::before,
.login__divider::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--color-border);
}

.login__sso-hint {
    margin: 0.5rem 0 0;
    font-size: 0.6875rem;
    line-height: 1.4;
    color: var(--color-text-secondary);
    text-align: center;
}

.login__email-sent strong {
    color: var(--color-text);
}

.login__terms {
    margin: 1rem 0;
    padding: 0.875rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 0.375rem;
}

.login__terms-label {
    display: flex;
    align-items: flex-start;
    gap: 0.625rem;
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--color-text);
    cursor: pointer;
}

.login__terms-checkbox {
    margin-top: 0.125rem;
    width: 1rem;
    height: 1rem;
    cursor: pointer;
    flex-shrink: 0;
}

.login__terms-link {
    background: none;
    border: none;
    color: var(--color-primary);
    font-family: inherit;
    font-size: inherit;
    font-weight: 500;
    text-decoration: underline;
    cursor: pointer;
    padding: 0;
}

.login__terms-link:hover {
    color: var(--color-primary-hover);
}

.login__input--otp {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    text-align: center;
    letter-spacing: 0.5rem;
    padding: 1rem;
}

.terms-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.terms-modal__backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.terms-modal__content {
    position: relative;
    background: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    max-width: 42rem;
    width: 100%;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
}

.terms-modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.terms-modal__title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0;
}

.terms-modal__close {
    background: none;
    border: none;
    color: var(--color-text-secondary);
    cursor: pointer;
    padding: 0.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.25rem;
    transition: background 0.15s, color 0.15s;
}

.terms-modal__close:hover {
    background: var(--color-bg);
    color: var(--color-text);
}

.terms-modal__body {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    font-size: 0.9375rem;
    line-height: 1.6;
    color: var(--color-text);
}

.terms-modal__body h3 {
    font-size: 1rem;
    font-weight: 600;
    margin: 1.5rem 0 0.75rem 0;
    color: var(--color-text);
}

.terms-modal__body h3:first-child {
    margin-top: 0;
}

.terms-modal__body p {
    margin: 0.75rem 0;
}

.terms-modal__body ul {
    margin: 0.75rem 0;
    padding-left: 1.5rem;
}

.terms-modal__body li {
    margin: 0.5rem 0;
}

.terms-modal__body strong {
    font-weight: 600;
    color: var(--color-text);
}

.terms-modal__version {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

.terms-modal__footer {
    padding: 1.5rem;
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: flex-end;
}

.login__turnstile {
    display: flex;
    justify-content: center;
    min-height: 65px;
}

@media (max-width: 48rem) {
    .chat {
        grid-template-columns: 1fr;
    }

    .chat--viewer-open {
        grid-template-columns: 1fr;
    }

    .chat__sidebar {
        display: none;
    }

    .chat--viewer-open .chat__viewer {
        position: fixed;
        top: var(--nav-h);
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 50;
    }

    .chat__welcome {
        padding: 0.5rem 0 0.375rem;
    }

    .chat__messages {
        padding: 1rem 0.75rem 0.5rem;
    }

    .chat__qbank {
        margin-left: 0.75rem;
        margin-right: 0.75rem;
    }

    .chat__welcome-icon {
        width: 2.5rem;
        height: 2.5rem;
        border-radius: 50%;
    }

    .chat__welcome-icon svg {
        width: 18px;
        height: 18px;
    }

    .chat__welcome-title {
        font-size: 1.0625rem;
    }

    .chat__welcome-subtitle {
        font-size: 0.75rem;
    }

    .chat__form {
        padding: 0.5rem 0.75rem 0.75rem;
    }

    .chat__autocomplete {
        left: 0.75rem;
        right: 0.75rem;
    }

    .message {
        max-width: 100%;
    }

    .message__avatar {
        width: 1.75rem;
        height: 1.75rem;
    }

    .library__header {
        flex-direction: column;
        gap: 1rem;
    }

    .library__header-right {
        flex-direction: column;
        width: 100%;
        gap: 1rem;
    }

    .library__upload-btn {
        width: 100%;
        justify-content: center;
    }

    .library__stats {
        width: 100%;
        justify-content: space-between;
    }

    .library__stat {
        flex: 1;
        min-width: 0;
        padding: 0.75rem 1rem;
    }

    .library__stat-value {
        font-size: 1.5rem;
    }

    .library__table {
        font-size: 0.8125rem;
    }

    .library__th,
    .library__td {
        padding: 0.625rem 0.5rem;
    }

    .library__th--pages,
    .library__th--size,
    .library__th--date {
        display: none;
    }

    .library__td--pages,
    .library__td--size,
    .library__td--date {
        display: none;
    }

    .library__th--status {
        width: 5.5rem;
    }

    .library__th--actions {
        width: 7rem;
    }

    .library__doc-authors,
    .library__doc-summary {
        display: none;
    }

    .library__actions {
        gap: 0.25rem;
    }

    .library__action-btn {
        width: 1.75rem;
        height: 1.75rem;
    }

    .library__action-btn svg {
        width: 14px;
        height: 14px;
    }
}

/* ─── History view (email browser style) ─────────────────────────── */

.history {
    display: grid;
    grid-template-columns: 24rem 1fr;
    height: 100%;
    background: var(--color-bg);
}

.history__sidebar {
    background: var(--color-surface);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.history__sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-surface);
}

.history__sidebar-title {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.history__sidebar-title svg {
    color: var(--color-primary);
}

.history__count {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-primary);
    background: color-mix(in srgb, var(--color-primary) 6%, white);
    padding: 0.125rem 0.625rem;
    border-radius: 1rem;
    min-width: 1.5rem;
    text-align: center;
}

.history__actions {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--color-border);
}

.history__export-row {
    display: flex;
    gap: 0.5rem;
}

.history__export-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.375rem;
    flex: 1;
    padding: 0.5rem 0.75rem;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-family: var(--font-sans);
    font-size: 0.8125rem;
    color: var(--color-text);
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.history__export-btn--csv:hover {
    background: #dbeafe;
    color: #2563eb;
    border-color: #2563eb;
}

.history__export-btn--pdf:hover {
    background: #fce7f3;
    color: #db2777;
    border-color: #db2777;
}

.history__delete-all-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.375rem;
    width: 100%;
    padding: 0.5rem 0.75rem;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all 0.15s;
}

.history__delete-all-btn:hover:not(:disabled) {
    background: #fee2e2;
    color: var(--color-error);
    border-color: var(--color-error);
}

.history__delete-all-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.history__list {
    flex: 1;
    overflow-y: auto;
    padding: 0.5rem;
}

.history__loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 2rem 1rem;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.history__empty-list {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    padding: 3rem 1.5rem;
    text-align: center;
    color: var(--color-text-secondary);
}

.history__empty-list p {
    font-size: 0.875rem;
}

.history__chat-link {
    font-size: 0.8125rem;
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    border: 1px solid var(--color-primary);
    transition: all 0.2s;
}

.history__chat-link:hover {
    background: var(--color-primary);
    color: white;
}

.history__error {
    padding: 1.5rem 1rem;
    text-align: center;
    color: var(--color-error);
}

.history__error-message {
    font-size: 0.75rem;
    margin-top: 0.5rem;
    color: var(--color-text-secondary);
}

.history__item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 0.75rem;
    margin-bottom: 0.5rem;
    cursor: pointer;
    transition: all 0.15s;
}

.history__item:hover {
    border-color: var(--color-primary);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.history__item--active {
    background: color-mix(in srgb, var(--color-primary) 6%, white);
    border-color: var(--color-primary);
    box-shadow: 0 2px 8px rgba(44, 74, 110, 0.15);
}

.history__item-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.375rem;
}

.history__item-user {
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--color-primary);
}

.history__item-time {
    font-size: 0.6875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.history__item-question {
    font-size: 0.8125rem;
    line-height: 1.4;
    color: var(--color-text);
    margin-bottom: 0.375rem;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.history__item-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 0.25rem;
}

.history__item-footer-left {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    min-width: 0;
    overflow: hidden;
}

.history__item-date {
    font-size: 0.6875rem;
    color: var(--color-text-secondary);
}

.history__item-delete {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.25rem;
    background: transparent;
    border: none;
    border-radius: 0.25rem;
    color: var(--color-text-secondary);
    cursor: pointer;
    opacity: 0;
    transition: all 0.15s;
}

.history__item:hover .history__item-delete {
    opacity: 1;
}

.history__item-delete:hover {
    background: #fee2e2;
    color: var(--color-error);
}

.history__item-delete:active {
    transform: scale(0.9);
}

.history__item--deleted {
    opacity: 0.6;
    background: #fef2f2;
    border-color: #fecaca;
}

.history__item--deleted:hover {
    border-color: var(--color-error);
}

.history__item--deleted.history__item--active {
    background: #fef2f2;
    border-color: var(--color-error);
}

.history__item-deleted-badge {
    font-size: 0.625rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--color-error);
    background: #fee2e2;
    padding: 0.125rem 0.375rem;
    border-radius: 0.25rem;
    margin-left: 0.375rem;
}

.history__content {
    background: var(--color-bg);
    overflow-y: auto;
    padding: 2rem;
}

.history__empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    color: var(--color-text-secondary);
    gap: 1rem;
}

.history__empty p {
    font-size: 0.9375rem;
}

.history__detail {
    max-width: 56rem;
    margin: 0 auto;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
    animation: fadeInUp 0.3s ease-out;
}

.history__detail--deleted {
    border-color: #fecaca;
    background: #fefefe;
}

.history__detail-deleted {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.75rem;
    padding: 0.625rem 0.875rem;
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: 0.375rem;
    color: var(--color-error);
    font-size: 0.8125rem;
}

.history__detail-deleted svg {
    flex-shrink: 0;
}

.history__detail-header {
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--color-border);
}

.history__detail-meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8125rem;
}

.history__detail-user {
    font-weight: 700;
    color: var(--color-primary);
}

.history__detail-separator {
    color: var(--color-text-secondary);
    opacity: 0.5;
}

.history__detail-date {
    color: var(--color-text-secondary);
}

.history__detail-location {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    margin-top: 0.5rem;
}

.history__detail-location svg {
    flex-shrink: 0;
    opacity: 0.6;
}

.history__detail-ip {
    font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
    padding: 0.125rem 0.375rem;
    background: var(--color-bg-secondary);
    border-radius: 0.25rem;
    font-size: 0.6875rem;
}

.history__detail-question,
.history__detail-answer {
    margin-bottom: 1.5rem;
}

.history__detail-label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-text-secondary);
    margin-bottom: 0.5rem;
}

.history__detail-text {
    font-size: 0.9375rem;
    line-height: 1.7;
    color: var(--color-text);
}

.history__detail-question .history__detail-text {
    font-weight: 500;
    color: var(--color-text);
}

.history__detail-answer .history__detail-text h2,
.history__detail-answer .history__detail-text h3,
.history__detail-answer .history__detail-text h4 {
    margin: 1rem 0 0.5rem;
    line-height: 1.3;
}

.history__detail-answer .history__detail-text h2:first-child,
.history__detail-answer .history__detail-text h3:first-child,
.history__detail-answer .history__detail-text h4:first-child {
    margin-top: 0;
}

.history__detail-answer .history__detail-text h2 { font-size: 1.25rem; }
.history__detail-answer .history__detail-text h3 { font-size: 1.0625rem; }
.history__detail-answer .history__detail-text h4 { font-size: 0.9375rem; }

.history__detail-answer .history__detail-text p {
    margin: 0.5rem 0;
}

.history__detail-answer .history__detail-text ul,
.history__detail-answer .history__detail-text ol {
    margin: 0.5rem 0;
    padding-left: 1.5rem;
}

.history__detail-answer .history__detail-text li {
    margin-bottom: 0.375rem;
}

.history__detail-label-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.history__detail-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.history__copy-btn,
.history__continue-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.75rem;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.history__copy-btn:hover,
.history__continue-btn:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(44, 74, 110, 0.15);
}

.history__copy-btn:active,
.history__continue-btn:active {
    transform: translateY(0);
}

.history__copy-btn--copied {
    background: var(--color-success);
    color: white;
    border-color: var(--color-success);
}

.history__share-btn,
.history__email-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.75rem;
    font-size: 0.8125rem;
    font-weight: 500;
    border: 1px solid var(--color-border);
    border-radius: 0.375rem;
    background: white;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all 0.15s ease;
}

.history__share-btn:hover,
.history__email-btn:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.history__share-btn:active,
.history__email-btn:active {
    transform: translateY(0);
}

.history__share-btn--copied {
    background: var(--color-success);
    color: white;
    border-color: var(--color-success);
}

.history__latex-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.75rem;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.history__latex-btn:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(44, 74, 110, 0.15);
}

.history__latex-btn:active {
    transform: translateY(0);
}

.history__latex-btn--copied {
    background: var(--color-success);
    color: white;
    border-color: var(--color-success);
}

/* Share Email Modal */
.share-email-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.share-email-modal__backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.share-email-modal__content {
    position: relative;
    background: white;
    border-radius: 0.75rem;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
    width: 100%;
    max-width: 480px;
    margin: 1rem;
    animation: modalSlideIn 0.2s ease-out;
}

@keyframes modalSlideIn {
    from { opacity: 0; transform: translateY(-10px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.share-email-modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.share-email-modal__title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0;
}

.share-email-modal__close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-text-secondary);
    cursor: pointer;
    padding: 0.25rem;
    line-height: 1;
    border-radius: 0.25rem;
    transition: background 0.15s;
}

.share-email-modal__close:hover {
    background: var(--color-bg-secondary);
}

.share-email-modal__body {
    padding: 1.5rem;
}

.share-email-modal__description {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    margin: 0 0 1rem;
}

.share-email-modal__preview {
    background: var(--color-bg-secondary);
    border-left: 3px solid var(--color-primary);
    padding: 0.75rem 1rem;
    border-radius: 0 0.375rem 0.375rem 0;
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    margin-bottom: 1.25rem;
    line-height: 1.5;
}

.share-email-modal__label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.share-email-modal__input {
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-size: 0.9375rem;
    border: 1px solid var(--color-border);
    border-radius: 0.5rem;
    outline: none;
    transition: border-color 0.15s, box-shadow 0.15s;
    box-sizing: border-box;
}

.share-email-modal__input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.share-email-modal__error {
    margin-top: 0.5rem;
    font-size: 0.8125rem;
    color: var(--color-danger, #dc2626);
}

.share-email-modal__footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--color-border);
}

.share-email-modal__cancel-btn {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid var(--color-border);
    border-radius: 0.5rem;
    background: white;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: background 0.15s;
}

.share-email-modal__cancel-btn:hover {
    background: var(--color-bg-secondary);
}

.share-email-modal__send-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 600;
    border: none;
    border-radius: 0.5rem;
    background: var(--color-primary);
    color: white;
    cursor: pointer;
    transition: background 0.15s, transform 0.1s;
}

.share-email-modal__send-btn:hover {
    background: var(--color-primary-dark, #1d4ed8);
}

.share-email-modal__send-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.share-email-modal__send-btn--sent {
    background: var(--color-success);
}

/* Shared Q&A View */
.shared {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 2rem 1rem 6rem;
    min-height: 400px;
}

.shared__loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 3rem;
    color: var(--color-text-secondary);
}

.shared__error {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 0.75rem;
    padding: 3rem;
    max-width: 420px;
}

.shared__error h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0.5rem 0 0;
}

.shared__error p {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0;
}

.shared__back-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
    padding: 0.625rem 1.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    background: var(--color-primary);
    color: white;
    border-radius: 0.5rem;
    text-decoration: none;
    transition: background 0.15s;
}

.shared__back-btn:hover {
    background: var(--color-primary-dark, #1d4ed8);
}

.shared__card {
    width: 100%;
    max-width: 800px;
    background: white;
    border: 1px solid var(--color-border);
    border-radius: 0.75rem;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.shared__header {
    padding: 1.25rem 1.5rem;
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
}

.shared__badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-primary);
    background: rgba(37, 99, 235, 0.08);
    padding: 0.375rem 0.75rem;
    border-radius: 2rem;
}

.shared__meta {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    margin: 0.75rem 0 0;
}

.shared__question,
.shared__answer,
.shared__sources {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.shared__label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
    margin-bottom: 0.75rem;
}

.shared__text {
    font-size: 0.9375rem;
    color: var(--color-text);
    line-height: 1.7;
}

.shared__source {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    padding: 0.375rem 0;
}

.shared__source-badge {
    font-weight: 600;
    color: var(--color-primary);
    font-size: 0.75rem;
}

.shared__source-name {
    font-weight: 500;
}

.shared__source-pages {
    color: var(--color-text-secondary);
    opacity: 0.7;
}

.shared__actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1.25rem 1.5rem;
}

.shared__claim-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 600;
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: background 0.15s;
}

.shared__claim-btn:hover {
    background: var(--color-primary-dark, #1d4ed8);
}

.shared__claim-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.shared__claim-btn--saved {
    background: var(--color-success);
}

.shared__chat-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    background: white;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    border-radius: 0.5rem;
    text-decoration: none;
    transition: all 0.15s;
}

.shared__chat-btn:hover {
    background: var(--color-bg-secondary);
    color: var(--color-text);
}

.shared__continue-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    background: white;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.15s;
}

.shared__continue-btn:hover {
    background: var(--color-primary);
    color: white;
}

.shared__continue-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.shared__signin-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: #3a6a8a;
    box-shadow: 0 -2px 12px rgba(0, 0, 0, 0.15);
    padding: 1rem 1.5rem;
}

.shared__signin-bar-inner {
    display: flex;
    align-items: center;
    gap: 1rem;
    max-width: 900px;
    margin: 0 auto;
}

.shared__signin-bar .shared__signin-icon {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    cursor: pointer;
    animation: signin-icon-pulse 2.5s ease-in-out infinite;
}

@keyframes signin-icon-pulse {
    0%, 100% {
        background: rgba(255, 255, 255, 0.2);
        box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.3);
    }
    50% {
        background: rgba(255, 255, 255, 0.35);
        box-shadow: 0 0 0 8px rgba(255, 255, 255, 0);
    }
}

.shared__signin-bar .shared__signin-text {
    flex: 1;
    min-width: 0;
}

.shared__signin-bar .shared__signin-title {
    font-weight: 600;
    font-size: 0.9375rem;
    color: #ffffff;
    margin: 0 0 0.25rem;
}

.shared__signin-bar .shared__signin-desc {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.85);
    margin: 0;
    line-height: 1.5;
}

.shared__signin-btn {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.25rem;
    background: #ffffff;
    color: #3a6a8a;
    border: none;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s, transform 0.1s;
    white-space: nowrap;
}

.shared__signin-btn:hover {
    background: #e8f0f5;
    transform: translateY(-1px);
}

@media (max-width: 600px) {
    .shared__signin-bar {
        padding: 0.875rem 1rem;
    }

    .shared__signin-bar-inner {
        flex-wrap: wrap;
        gap: 0.75rem;
    }

    .shared__signin-bar .shared__signin-icon {
        display: none;
    }

    .shared__signin-btn {
        width: 100%;
        justify-content: center;
        padding: 0.625rem 1rem;
    }
}

.history__sources {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
}

.history__sources-title {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-text-secondary);
    margin-bottom: 0.75rem;
}

.history__source {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    margin-bottom: 0.5rem;
    font-size: 0.8125rem;
}

.history__source-badge {
    font-weight: 700;
    color: var(--color-primary);
    flex-shrink: 0;
}

.history__source-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--color-text);
}

.history__source-pages {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    flex-shrink: 0;
}

.history__download {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
}

.history__download-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: white;
    border: none;
    border-radius: 2rem;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 2px 8px rgba(44, 74, 110, 0.2);
}

.history__download-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(44, 74, 110, 0.3);
    color: white;
}

.history__download-btn:active {
    transform: translateY(0);
}

.history__download-btn svg {
    flex-shrink: 0;
}

.history__list::-webkit-scrollbar,
.history__content::-webkit-scrollbar {
    width: 6px;
}

.history__list::-webkit-scrollbar-track,
.history__content::-webkit-scrollbar-track {
    background: transparent;
}

.history__list::-webkit-scrollbar-thumb,
.history__content::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 3px;
}

.history__list::-webkit-scrollbar-thumb:hover,
.history__content::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-secondary);
}

@media (max-width: 64rem) {
    .history {
        grid-template-columns: 20rem 1fr;
    }
}

@media (max-width: 48rem) {
    .history {
        grid-template-columns: 1fr;
    }

    .history__sidebar {
        display: flex;
    }

    .history__content {
        display: none;
        padding: 1rem;
    }

    .history--detail-visible .history__sidebar {
        display: none;
    }

    .history--detail-visible .history__content {
        display: block;
    }

    .history__back-btn {
        display: flex;
    }

    .history__detail {
        padding: 1.25rem;
    }
}

/* ─── Admin view ──────────────────────────────────────────────── */

.admin {
    max-width: 56rem;
    margin: 0 auto;
}

.admin__header {
    margin-bottom: 2rem;
}

.admin__title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.admin__subtitle {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
}

.admin__sections {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.admin__section {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.75rem;
    box-shadow: var(--shadow);
}

.admin__section-header {
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--color-border);
}

.admin__section-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 0.375rem;
}

.admin__section-description {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

.admin__field {
    margin-bottom: 1.5rem;
}

.admin__label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.admin__input-row {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.admin__input-row .admin__input {
    flex: 1;
    min-width: 0;
}

.admin__input-row .btn--sm {
    flex-shrink: 0;
    white-space: nowrap;
    height: 46px;
}

.admin__input {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    color: var(--color-text);
    background: var(--color-surface);
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
}

.admin__input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(44, 74, 110, 0.1);
}

.admin__input::placeholder {
    color: var(--color-text-secondary);
    opacity: 0.6;
}

.admin__textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    color: var(--color-text);
    background: var(--color-surface);
    resize: vertical;
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
    line-height: 1.6;
}

.admin__textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(44, 74, 110, 0.1);
}

.admin__textarea::placeholder {
    color: var(--color-text-secondary);
    opacity: 0.6;
}

.admin__hint {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    margin-top: 0.5rem;
    line-height: 1.5;
}

.admin__label--toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    cursor: pointer;
    margin-bottom: 0;
}

.admin__toggle-text {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text);
}

.admin__toggle-wrapper {
    position: relative;
    display: inline-flex;
    flex-shrink: 0;
}

.admin__toggle-checkbox {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.admin__toggle-track {
    display: block;
    width: 40px;
    height: 22px;
    background: var(--color-border);
    border-radius: 999px;
    transition: background 0.2s;
    cursor: pointer;
}

.admin__toggle-track::after {
    content: '';
    position: absolute;
    top: 3px;
    left: 3px;
    width: 16px;
    height: 16px;
    background: #fff;
    border-radius: 50%;
    transition: transform 0.2s;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
}

.admin__toggle-checkbox:checked + .admin__toggle-track {
    background: var(--color-primary);
}

.admin__toggle-checkbox:checked + .admin__toggle-track::after {
    transform: translateX(18px);
}

.admin__toggle-checkbox:focus-visible + .admin__toggle-track {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.admin__actions {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.admin__status {
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 500;
    margin-top: 1rem;
}

.admin__status--success {
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #6ee7b7;
}

.admin__status--error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fca5a5;
}

.admin__status--info {
    background: #dbeafe;
    color: #1e40af;
    border: 1px solid #93c5fd;
}

/* Branding upload */
.branding__preview {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}

.branding__preview-img {
    width: 4rem;
    height: 4rem;
    object-fit: contain;
    border-radius: 0.375rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: 0.25rem;
}

.branding__preview-label {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    font-weight: 500;
}

.branding__bg-preview {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 1rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}

.branding__bg-preview-img {
    width: 100%;
    max-height: 12rem;
    object-fit: cover;
    border-radius: 0.375rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
}

.branding__upload-area {
    position: relative;
    border: 2px dashed var(--color-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s;
    background: var(--color-surface);
}

.branding__upload-area:hover,
.branding__upload-area--active {
    border-color: var(--color-primary);
    background: #f0f0ff;
}

.branding__upload-input {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.branding__upload-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-secondary);
    pointer-events: none;
}

.branding__upload-content svg {
    opacity: 0.5;
}

.branding__upload-hint {
    font-size: 0.75rem;
    opacity: 0.7;
}

.admin__section--placeholder {
    background: var(--color-bg);
    border-style: dashed;
}

.admin__placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 2rem;
    text-align: center;
    color: var(--color-text-secondary);
}

.admin__placeholder svg {
    opacity: 0.3;
}

.admin__placeholder p {
    font-size: 0.875rem;
}

@media (max-width: 48rem) {
    .admin {
        padding: 1rem;
    }

    .admin__section {
        padding: 1.25rem;
    }

    .admin__actions {
        flex-direction: column;
        align-items: stretch;
    }

    .admin__actions .btn {
        width: 100%;
        justify-content: center;
    }
}

/* ─── Users Modal ──────────────────────────────────────────────── */

.users-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.users-modal__backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.2s ease-out;
}

.users-modal__content {
    position: relative;
    background: var(--color-surface);
    border-radius: 0.75rem;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    width: 100%;
    max-width: 56rem;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: slideUp 0.3s ease-out;
}

.users-modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-surface);
}

.users-modal__title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: 0.625rem;
}

.users-modal__title svg {
    color: var(--color-primary);
}

.users-modal__close {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.375rem;
    background: transparent;
    border: none;
    border-radius: 0.375rem;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all 0.15s;
}

.users-modal__close:hover {
    background: var(--color-error);
    color: white;
}

.users-modal__body {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
}

.users-modal__loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 3rem;
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

.users-modal__stats {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.users-modal__stat {
    display: flex;
    flex-direction: column;
    padding: 1rem 1.5rem;
    background: var(--color-bg);
    border-radius: 0.5rem;
    border: 1px solid var(--color-border);
}

.users-modal__stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
}

.users-modal__stat-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-top: 0.375rem;
}

.users-modal__table-wrapper {
    overflow-x: auto;
    border: 1px solid var(--color-border);
    border-radius: 0.5rem;
}

.users-modal__table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.users-modal__table thead {
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
}

.users-modal__table th {
    padding: 0.75rem 1rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--color-text-secondary);
    white-space: nowrap;
}

.users-modal__table tbody tr {
    border-bottom: 1px solid var(--color-border);
    transition: background 0.1s;
}

.users-modal__table tbody tr:last-child {
    border-bottom: none;
}

.users-modal__table tbody tr:hover {
    background: var(--color-bg);
}

.users-modal__table td {
    padding: 0.75rem 1rem;
    color: var(--color-text);
}

.users-modal__email {
    font-weight: 500;
}

.users-modal__role {
    display: inline-block;
    padding: 0.125rem 0.5rem;
    border-radius: 1rem;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.025em;
    background: #e5e7eb;
    color: #374151;
}

.users-modal__role--admin {
    background: #dbeafe;
    color: #1e40af;
}

.users-modal__date {
    color: var(--color-text-secondary);
    font-size: 0.8125rem;
    white-space: nowrap;
}

.users-modal__count {
    font-weight: 600;
    color: var(--color-primary);
    text-align: center;
}

.users-modal__empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 3rem;
    text-align: center;
    color: var(--color-text-secondary);
}

.users-modal__empty svg {
    opacity: 0.3;
}

.users-modal__empty p {
    font-size: 0.9375rem;
}

.users-modal__footer {
    display: flex;
    justify-content: flex-end;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--color-border);
    background: var(--color-bg);
}

.users-modal__footer .btn {
    text-decoration: none;
}

@media (max-width: 48rem) {
    .users-modal__content {
        max-height: 90vh;
    }

    .users-modal__stats {
        flex-direction: column;
        gap: 0.75rem;
    }

    .users-modal__table th,
    .users-modal__table td {
        padding: 0.625rem 0.75rem;
    }
}

/* ─── Users view ─────────────────────────────────────────────── */

.users-view {
    max-width: none;
    margin: 0 auto;
    padding: 2rem 2rem;
}

.users-view__header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.users-view__title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: 0.625rem;
    margin: 0;
}

.users-view__title svg {
    color: var(--color-primary);
}

.users-view__subtitle {
    margin: 0.375rem 0 0;
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

.users-view__actions {
    display: flex;
    gap: 0.75rem;
    flex-shrink: 0;
}

.users-view__actions .btn {
    text-decoration: none;
}

.users-view__stats {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.users-view__stat {
    display: flex;
    flex-direction: column;
    padding: 1rem 1.5rem;
    background: var(--color-surface);
    border-radius: 0.5rem;
    border: 1px solid var(--color-border);
}

.users-view__stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
}

.users-view__stat-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-top: 0.375rem;
}

.users-view__loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 3rem;
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

.users-view__table-wrapper {
    overflow-x: auto;
    border: 1px solid var(--color-border);
    border-radius: 0.5rem;
    background: var(--color-surface);
}

.users-view__table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.users-view__table thead {
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
}

.users-view__table th {
    padding: 0.75rem 1rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--color-text-secondary);
    white-space: nowrap;
}

.users-view__table tbody tr {
    border-bottom: 1px solid var(--color-border);
    transition: background 0.1s;
}

.users-view__table tbody tr:last-child {
    border-bottom: none;
}

.users-view__table tbody tr:hover {
    background: var(--color-bg);
}

.users-view__table td {
    padding: 0.75rem 1rem;
    color: var(--color-text);
}

.users-view__email {
    font-weight: 500;
}

.users-view__role {
    display: inline-block;
    padding: 0.125rem 0.5rem;
    border-radius: 1rem;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.025em;
    background: #e5e7eb;
    color: #374151;
    min-width: 3.5rem;
    text-align: center;
}

.users-view__role--admin {
    background: #dbeafe;
    color: #1e40af;
}

.users-view__role-cell {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.users-view__role-toggle {
    display: inline-flex;
    align-items: center;
    padding: 0.1875rem 0.5rem;
    border-radius: 0.375rem;
    border: 1px solid #d1d5db;
    background: #ffffff;
    color: #374151;
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
    white-space: nowrap;
}

.users-view__role-toggle:hover:not(:disabled) {
    background: #eff6ff;
    border-color: #93c5fd;
    color: #1e40af;
}

.users-view__role-toggle:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.users-view__role-locked {
    display: inline-flex;
    align-items: center;
    color: #9ca3af;
    cursor: help;
}

.users-view__date {
    color: var(--color-text-secondary);
    font-size: 0.8125rem;
    white-space: nowrap;
}

.users-view__count {
    font-weight: 600;
    color: var(--color-primary);
    text-align: center;
}

.users-view__empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 3rem;
    text-align: center;
    color: var(--color-text-secondary);
}

.users-view__empty svg {
    opacity: 0.3;
}

.users-view__empty p {
    font-size: 0.9375rem;
}

@media (max-width: 48rem) {
    .users-view__header {
        flex-direction: column;
    }

    .users-view__actions {
        flex-wrap: wrap;
    }

    .users-view__stats {
        flex-direction: column;
        gap: 0.75rem;
    }

    .users-view__table th,
    .users-view__table td {
        padding: 0.625rem 0.75rem;
    }
}

.users-view__user-row--expandable {
    cursor: pointer;
}

.users-view__user-row--expandable:hover {
    background: rgba(44, 74, 110, 0.04);
}

.users-view__user-row--expanded {
    background: rgba(44, 74, 110, 0.04);
    border-bottom-color: transparent;
}

.users-view__expand-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-primary);
    background: rgba(44, 74, 110, 0.08);
    border: 1px solid rgba(44, 74, 110, 0.2);
    border-radius: 1rem;
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
}

.users-view__expand-pill:hover {
    background: rgba(44, 74, 110, 0.15);
    border-color: rgba(44, 74, 110, 0.35);
}

.users-view__expand-pill--open {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.users-view__expand-pill--open:hover {
    background: var(--color-primary);
    opacity: 0.9;
}

.users-view__expand-chevron {
    transition: transform 0.2s;
    flex-shrink: 0;
}

.users-view__expand-pill--open .users-view__expand-chevron {
    transform: rotate(90deg);
}

.users-view__count-zero {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.users-view__detail-row td {
    padding: 0 !important;
    background: var(--color-bg);
}

.users-view__queries {
    padding: 0;
}

.users-view__queries-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1.5rem;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.users-view__queries-error {
    padding: 1.5rem;
    color: var(--color-error);
    font-size: 0.875rem;
    text-align: center;
}

.users-view__queries-empty {
    padding: 1.5rem;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    text-align: center;
}

.users-view__queries-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-surface);
}

.users-view__queries-count {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-text-secondary);
}

.users-view__queries-export {
    display: flex;
    gap: 0.5rem;
}

.users-view__export-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.25rem 0.625rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-primary);
    background: transparent;
    border: 1px solid var(--color-primary);
    border-radius: 0.375rem;
    text-decoration: none;
    transition: all 0.15s;
    cursor: pointer;
}

.users-view__export-btn:hover {
    background: var(--color-primary);
    color: white;
}

.users-view__queries-list {
    max-height: 32rem;
    overflow-y: auto;
}

.users-view__qa-item {
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--color-border);
    transition: background 0.1s;
}

.users-view__qa-item:last-child {
    border-bottom: none;
}

.users-view__qa-item:hover {
    background: var(--color-surface);
}

.users-view__qa-meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.375rem;
}

.users-view__qa-date {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
}

.users-view__qa-model {
    display: inline-block;
    padding: 0.0625rem 0.375rem;
    border-radius: 0.75rem;
    font-size: 0.625rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.025em;
    background: #dbeafe;
    color: #1e40af;
}

.users-view__qa-question {
    font-size: 0.8125rem;
    color: var(--color-text);
    margin-bottom: 0.25rem;
    line-height: 1.5;
}

.users-view__qa-answer {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

.users-view__qa-label {
    display: inline-block;
    font-weight: 700;
    color: var(--color-primary);
    margin-right: 0.25rem;
    font-size: 0.75rem;
}

.users-view__qa-sources {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
    margin-top: 0.375rem;
}

.users-view__qa-source {
    display: inline-block;
    padding: 0.125rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.6875rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
}

@media (max-width: 48rem) {
    .users-view__queries-header {
        flex-direction: column;
        gap: 0.5rem;
        align-items: flex-start;
    }

    .users-view__qa-item {
        padding: 0.75rem;
    }
}

.users-view__qa-item[role="button"] {
    cursor: pointer;
}

.users-view__qa-item[role="button"]:hover {
    background: rgba(44, 74, 110, 0.04);
}

/* ─── Users Q&A detail modal ─────────────────────────────────── */

.users-qa-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.users-qa-modal__backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.users-qa-modal__content {
    position: relative;
    background: var(--color-surface, white);
    border-radius: 0.75rem;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
    width: 100%;
    max-width: 56rem;
    max-height: 85vh;
    margin: 1rem;
    display: flex;
    flex-direction: column;
    animation: modalSlideIn 0.2s ease-out;
}

.users-qa-modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--color-border);
    flex-shrink: 0;
}

.users-qa-modal__meta {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    flex-wrap: wrap;
}

.users-qa-modal__date {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

.users-qa-modal__model {
    display: inline-block;
    padding: 0.0625rem 0.5rem;
    border-radius: 0.75rem;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.025em;
    background: #dbeafe;
    color: #1e40af;
}

.users-qa-modal__user {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-text);
}

.users-qa-modal__close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-text-secondary);
    cursor: pointer;
    padding: 0.25rem;
    line-height: 1;
    border-radius: 0.25rem;
    transition: background 0.15s;
    flex-shrink: 0;
}

.users-qa-modal__close:hover {
    background: var(--color-bg-secondary, #f3f4f6);
}

.users-qa-modal__body {
    padding: 1.5rem;
    overflow-y: auto;
    flex: 1;
    min-height: 0;
}

.users-qa-modal__question-section {
    margin-bottom: 1.5rem;
}

.users-qa-modal__label {
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
    margin-bottom: 0.5rem;
}

.users-qa-modal__question-text {
    font-size: 0.9375rem;
    color: var(--color-text);
    line-height: 1.6;
    background: var(--color-bg, #f9fafb);
    border-left: 3px solid var(--color-primary);
    padding: 0.75rem 1rem;
    border-radius: 0 0.375rem 0.375rem 0;
}

.users-qa-modal__answer-section {
    margin-bottom: 1.5rem;
}

.users-qa-modal__label-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.users-qa-modal__actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.users-qa-modal__copy-btn,
.users-qa-modal__continue-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    border: 1px solid var(--color-border);
    border-radius: 0.375rem;
    background: var(--color-surface, white);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
}

.users-qa-modal__copy-btn:hover,
.users-qa-modal__continue-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: rgba(44, 74, 110, 0.04);
}

.users-qa-modal__copy-btn--copied {
    border-color: var(--color-success, #22c55e);
    color: var(--color-success, #22c55e);
    background: rgba(34, 197, 94, 0.06);
}

.users-qa-modal__continue-btn {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: rgba(44, 74, 110, 0.04);
}

.users-qa-modal__continue-btn:hover {
    background: var(--color-primary);
    color: white;
}

.users-qa-modal__answer-text {
    font-size: 0.9375rem;
    color: var(--color-text);
    line-height: 1.7;
}

.users-qa-modal__answer-text h2 {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 1.25rem 0 0.625rem;
    color: var(--color-text);
}

.users-qa-modal__answer-text h3 {
    font-size: 1.0625rem;
    font-weight: 600;
    margin: 1rem 0 0.5rem;
    color: var(--color-text);
}

.users-qa-modal__answer-text h4 {
    font-size: 0.9375rem;
    font-weight: 600;
    margin: 0.875rem 0 0.375rem;
    color: var(--color-text);
}

.users-qa-modal__answer-text p {
    margin: 0 0 0.75rem;
}

.users-qa-modal__answer-text ol,
.users-qa-modal__answer-text ul {
    margin: 0 0 0.75rem;
    padding-left: 1.5rem;
}

.users-qa-modal__answer-text li {
    margin-bottom: 0.375rem;
}

.users-qa-modal__sources {
    border-top: 1px solid var(--color-border);
    padding-top: 1rem;
}

.users-qa-modal__sources-title {
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
    margin: 0 0 0.625rem;
}

.users-qa-modal__source {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0;
    font-size: 0.8125rem;
}

.users-qa-modal__source-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 1.5rem;
    height: 1.5rem;
    border-radius: 0.25rem;
    background: var(--color-bg, #f3f4f6);
    color: var(--color-primary);
    font-size: 0.6875rem;
    font-weight: 700;
}

.users-qa-modal__source-name {
    color: var(--color-text);
    font-weight: 500;
}

.users-qa-modal__source-pages {
    color: var(--color-text-secondary);
    font-size: 0.75rem;
}

@media (max-width: 48rem) {
    .users-qa-modal__content {
        max-width: 100%;
        max-height: 95vh;
        margin: 0.5rem;
        border-radius: 0.5rem;
    }

    .users-qa-modal__label-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
}

/* ─── Analytics view ──────────────────────────────────────────── */

.analytics {
    max-width: 72rem;
    margin: 0 auto;
}

.analytics__header {
    margin-bottom: 2rem;
}

.analytics__title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 0.375rem;
    display: flex;
    align-items: center;
    gap: 0.625rem;
}

.analytics__title svg {
    color: var(--color-primary);
}

.analytics__subtitle {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
}

.analytics__loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 4rem 2rem;
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

.analytics__error {
    padding: 1rem 1.25rem;
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fca5a5;
    border-radius: var(--radius);
    font-size: 0.875rem;
}

.analytics__summary {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.analytics__stat {
    display: flex;
    flex-direction: column;
    padding: 1.25rem 1.25rem;
    background: var(--color-surface);
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow);
}

.analytics__stat--primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    border-color: transparent;
}

.analytics__stat--primary .analytics__stat-value {
    color: white;
}

.analytics__stat--primary .analytics__stat-label {
    color: rgba(255, 255, 255, 0.8);
}

.analytics__stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.2;
}

.analytics__stat-label {
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-top: 0.375rem;
}

.analytics__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.analytics__card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.analytics__card--full {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.analytics__section-divider {
    margin-top: 2.5rem;
    padding-top: 2rem;
    border-top: 2px solid var(--color-border);
}

.analytics__section-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.analytics__section-title svg {
    color: var(--color-primary);
}

.analytics__card-title {
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.analytics__card-title svg {
    color: var(--color-primary);
    flex-shrink: 0;
}

.analytics__table-wrapper {
    overflow-x: auto;
    border: 1px solid var(--color-border);
    border-radius: 0.5rem;
}

.analytics__table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8125rem;
}

.analytics__table thead {
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
}

.analytics__table th {
    padding: 0.625rem 0.875rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--color-text-secondary);
    white-space: nowrap;
}

.analytics__table tbody tr {
    border-bottom: 1px solid var(--color-border);
    transition: background 0.1s;
}

.analytics__table tbody tr:last-child {
    border-bottom: none;
}

.analytics__table tbody tr:hover {
    background: var(--color-bg);
}

.analytics__table td {
    padding: 0.625rem 0.875rem;
    color: var(--color-text);
}

.analytics__model-name {
    font-weight: 600;
}

.analytics__doc-link {
    color: var(--color-primary, #6366f1);
    text-decoration: none;
    cursor: pointer;
    transition: color 0.15s ease;
}

.analytics__doc-link:hover {
    color: var(--color-primary-dark, #4f46e5);
    text-decoration: underline;
}

.analytics__user-email {
    font-weight: 500;
}

.analytics__cost {
    font-weight: 700;
    color: var(--color-primary);
    font-family: var(--font-mono);
    font-size: 0.8125rem;
}

.analytics__bar-wrapper {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 6rem;
}

.analytics__bar-wrapper .analytics__bar {
    height: 0.5rem;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    border-radius: 0.25rem;
    transition: width 0.3s ease;
}

.analytics__bar-wrapper span {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    white-space: nowrap;
}

.analytics__bars {
    display: flex;
    align-items: flex-end;
    gap: 0.25rem;
    height: 12rem;
    padding: 0.5rem 0;
    overflow-x: auto;
}

.analytics__bar-col {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
    min-width: 1.5rem;
    max-width: 3rem;
    height: 100%;
    justify-content: flex-end;
    cursor: default;
}

.analytics__bar-fill {
    width: 100%;
    background: linear-gradient(180deg, var(--color-primary), var(--color-accent));
    border-radius: 0.25rem 0.25rem 0 0;
    min-height: 2px;
    transition: height 0.3s ease;
}

.analytics__bar-col:hover .analytics__bar-fill {
    background: linear-gradient(180deg, var(--color-primary-hover), var(--color-accent));
    box-shadow: 0 0 8px rgba(44, 74, 110, 0.3);
}

.analytics__bar-fill--downloads {
    background: linear-gradient(180deg, #059669, #10b981);
}

.analytics__bar-col:hover .analytics__bar-fill--downloads {
    background: linear-gradient(180deg, #047857, #059669);
    box-shadow: 0 0 8px rgba(5, 150, 105, 0.3);
}

.analytics__bar-fill--shares {
    background: linear-gradient(180deg, var(--color-accent), var(--color-accent-light));
}

.analytics__bar-col:hover .analytics__bar-fill--shares {
    background: linear-gradient(180deg, var(--color-accent), var(--color-accent));
    box-shadow: 0 0 8px rgba(124, 58, 237, 0.3);
}

.analytics__bar-label {
    font-size: 0.5625rem;
    color: var(--color-text-secondary);
    margin-top: 0.375rem;
    white-space: nowrap;
}

.analytics__empty {
    padding: 1.5rem;
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

/* ─── Viral Funnel ─────────────────────────────────────── */

.analytics__funnel {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding: 1rem 0;
}

.analytics__funnel-stage {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.analytics__funnel-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8125rem;
}

.analytics__funnel-name {
    color: var(--color-text-secondary);
    min-width: 7rem;
}

.analytics__funnel-value {
    font-weight: 600;
    color: var(--color-text);
    min-width: 2.5rem;
}

.analytics__funnel-conv {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    background: var(--color-bg-secondary);
    padding: 0.125rem 0.375rem;
    border-radius: 4px;
}

.analytics__funnel-bar-bg {
    background: var(--color-bg-secondary);
    border-radius: 4px;
    height: 1.25rem;
    overflow: hidden;
}

.analytics__funnel-bar {
    height: 100%;
    border-radius: 4px;
    transition: width 0.4s ease;
}

/* ─── Share Badges ─────────────────────────────────────── */

.analytics__badge {
    display: inline-block;
    padding: 0.125rem 0.5rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
}

.analytics__badge--yes {
    background: rgba(16, 185, 129, 0.15);
    color: #059669;
}

.analytics__badge--no {
    background: rgba(156, 163, 175, 0.15);
    color: #6b7280;
}

/* ─── Card header with action button ─────────────────────────── */

.analytics__card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.analytics__card-header .analytics__card-title {
    margin-bottom: 0;
}

.btn--sm {
    padding: 0.25rem 0.625rem;
    font-size: 0.75rem;
    gap: 0.375rem;
}

.btn--outline {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    border: 1px solid var(--color-border);
    background: transparent;
    color: var(--color-text-secondary);
    border-radius: 6px;
    cursor: pointer;
    white-space: nowrap;
    transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.btn--outline:hover {
    background: var(--color-bg-secondary);
    color: var(--color-text);
    border-color: var(--color-text-secondary);
}

/* ─── Social Graph Modal ─────────────────────────────────────── */

.graph-modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.6);
    align-items: center;
    justify-content: center;
}

.graph-modal--open {
    display: flex;
}

.graph-modal__content {
    position: relative;
    background: var(--color-bg);
    border-radius: 12px;
    width: 90vw;
    max-width: 1000px;
    height: 70vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
    overflow: hidden;
}

.graph-modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--color-border);
}

.graph-modal__title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
}

.graph-modal__close {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text-secondary);
    padding: 0.25rem;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s, color 0.15s;
}

.graph-modal__close:hover {
    background: var(--color-bg-secondary);
    color: var(--color-text);
}

.graph-modal__legend {
    display: flex;
    gap: 1rem;
    padding: 0.5rem 1.25rem;
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    border-bottom: 1px solid var(--color-border);
}

.graph-modal__legend-item {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
}

.graph-modal__dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.graph-modal__dot--sharer   { background: #3a6a8a; }
.graph-modal__dot--recipient { background: #9ca3af; }
.graph-modal__dot--opened   { background: #f59e0b; }
.graph-modal__dot--claimed  { background: #10b981; }

.graph-modal__canvas-wrap {
    flex: 1;
    overflow: hidden;
    position: relative;
}

.graph-modal__canvas-wrap canvas {
    display: block;
    width: 100%;
    height: 100%;
}

.graph-modal__tooltip {
    display: none;
    position: absolute;
    background: var(--color-bg-secondary);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    padding: 0.25rem 0.5rem;
    border-radius: 6px;
    font-size: 0.75rem;
    pointer-events: none;
    white-space: nowrap;
    z-index: 10;
}

/* ─── History model badge ─────────────────────────────────────── */

.history__item-model {
    font-size: 0.5625rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--color-accent);
    background: #ede9fe;
    padding: 0.0625rem 0.375rem;
    border-radius: 0.25rem;
    margin-left: 0.25rem;
}

.history__item-route {
    display: inline-flex;
    align-items: center;
    gap: 0.15rem;
    font-size: 0.5625rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    color: var(--color-primary);
    background: rgba(44, 74, 110, 0.08);
    padding: 0.125rem 0.375rem;
    border-radius: 0.25rem;
    margin-left: 0.375rem;
    max-width: 10rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    cursor: default;
}

.history__item-route svg {
    flex-shrink: 0;
}

.history__detail-model {
    font-weight: 600;
    color: var(--color-accent);
    font-size: 0.8125rem;
}

.history__detail-route {
    display: inline-flex;
    align-items: center;
    gap: 0.2rem;
    font-weight: 600;
    color: var(--color-primary);
    font-size: 0.8125rem;
}

.history__detail-route svg {
    flex-shrink: 0;
}

/* ─── History cost badge ──────────────────────────────────────── */

.history__item-cost {
    font-size: 0.625rem;
    font-weight: 600;
    font-family: var(--font-mono);
    color: var(--color-success);
    background: #d1fae5;
    padding: 0.0625rem 0.375rem;
    border-radius: 0.25rem;
    margin-left: 0.25rem;
}

.history__detail-cost {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    margin-top: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    border-radius: 0.375rem;
}

.history__detail-cost svg {
    flex-shrink: 0;
    color: var(--color-success);
}

.history__detail-cost-model {
    font-weight: 600;
    color: var(--color-text);
}

.history__detail-cost-tokens {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    color: var(--color-text-secondary);
}

.history__detail-cost-amount {
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--color-primary);
    margin-left: auto;
}

.history__detail-timing {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    margin-top: 0.375rem;
}

.history__detail-timing svg {
    flex-shrink: 0;
    opacity: 0.6;
}

@media (max-width: 64rem) {
    .analytics__summary {
        grid-template-columns: repeat(3, 1fr);
    }

    .analytics__grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 48rem) {
    .analytics {
        padding: 1rem;
    }

    .analytics__summary {
        grid-template-columns: repeat(2, 1fr);
    }

    .analytics__bars {
        height: 8rem;
    }
}

/* ─── Question Bank Admin ────────────────────────────────────────── */

.qbank {
    max-width: 80rem;
    margin: 0 auto;
    padding: 2rem;
}

.qbank__header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.5rem;
    gap: 1rem;
    flex-wrap: wrap;
}

.qbank__title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
}

.qbank__subtitle {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

.qbank__header-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.qbank__import-btn {
    cursor: pointer;
}

.qbank__status {
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
    font-size: 0.875rem;
    font-weight: 500;
}

.qbank__status--success {
    background: #ecfdf5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.qbank__status--error {
    background: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.qbank__status--info {
    background: #eff6ff;
    color: #1e40af;
    border: 1px solid #bfdbfe;
}

.qbank__toolbar {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.qbank__level-order {
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
    margin-bottom: 1rem;
    padding: 0.75rem 1rem 1rem;
}

.qbank__level-order-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    color: var(--color-text);
    flex-wrap: wrap;
}

.qbank__level-order-title {
    font-weight: 600;
    font-size: 0.875rem;
}

.qbank__level-order-hint {
    font-weight: 400;
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

.qbank__level-order-status {
    margin-left: auto;
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    min-height: 1rem;
}

.qbank__level-order-status--success { color: #16a34a; }
.qbank__level-order-status--error { color: #dc2626; }
.qbank__level-order-status--pending { color: #b45309; }

.qbank__level-order-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.qbank__level-order-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-bg, #fff);
    cursor: grab;
    user-select: none;
    transition: background 0.15s ease, border-color 0.15s ease, transform 0.1s ease, box-shadow 0.15s ease;
}

.qbank__level-order-item:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.qbank__level-order-item:hover {
    border-color: color-mix(in srgb, var(--color-primary) 40%, var(--color-border));
}

.qbank__level-order-item:active {
    cursor: grabbing;
}

.qbank__level-order-item--dragging {
    opacity: 0.5;
    cursor: grabbing;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.qbank__level-order-item--drop-target {
    position: relative;
}

.qbank__level-order-item--drop-before::before,
.qbank__level-order-item--drop-after::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-primary, #2563eb);
    border-radius: 2px;
    pointer-events: none;
}

.qbank__level-order-item--drop-before::before { top: -3px; }
.qbank__level-order-item--drop-after::after { bottom: -3px; }

.qbank__level-order-handle {
    color: var(--color-text-secondary);
    display: inline-flex;
    align-items: center;
    cursor: grab;
}

.qbank__level-order-item--dragging .qbank__level-order-handle,
.qbank__level-order-handle:active {
    cursor: grabbing;
}

.qbank__level-order-position {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 1.5rem;
    height: 1.5rem;
    padding: 0 0.375rem;
    border-radius: 999px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-secondary);
}

.qbank__level-order-empty {
    padding: 0.5rem 0.75rem;
    color: var(--color-text-secondary);
    font-size: 0.8125rem;
    font-style: italic;
}

.qbank__search-wrapper {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 0.5rem 0.75rem;
    flex: 1;
    min-width: 12rem;
}

.qbank__search-wrapper svg {
    color: var(--color-text-secondary);
    flex-shrink: 0;
}

.qbank__search {
    border: none;
    outline: none;
    background: transparent;
    font-size: 0.875rem;
    width: 100%;
    color: var(--color-text);
}

.qbank__filter {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
    font-size: 0.875rem;
    color: var(--color-text);
    cursor: pointer;
}

.qbank__count {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    white-space: nowrap;
}

.qbank__table-wrapper {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    overflow-x: auto;
    box-shadow: var(--shadow);
}

.qbank__table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.qbank__th {
    text-align: left;
    padding: 0.75rem 1rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 2px solid var(--color-border);
    background: var(--color-bg);
    white-space: nowrap;
}

.qbank__th--level { width: 10rem; }
.qbank__th--audience { width: 12rem; }
.qbank__th--question { }
.qbank__th--actions { width: 6rem; text-align: center; }

.qbank__td {
    padding: 0.625rem 1rem;
    border-bottom: 1px solid var(--color-border);
    vertical-align: middle;
}

.qbank__td--actions {
    text-align: center;
    white-space: nowrap;
}

.qbank__level-badge {
    display: inline-block;
    padding: 0.125rem 0.5rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--level-color);
    background: color-mix(in srgb, var(--level-color) 12%, transparent);
    border: 1px solid color-mix(in srgb, var(--level-color) 30%, transparent);
}

.qbank__route-badge {
    display: inline-block;
    margin-left: 0.5rem;
    padding: 0.0625rem 0.375rem;
    border-radius: 999px;
    font-size: 0.675rem;
    font-weight: 500;
    color: var(--color-primary);
    background: color-mix(in srgb, var(--color-primary) 10%, transparent);
    border: 1px solid color-mix(in srgb, var(--color-primary) 25%, transparent);
    vertical-align: middle;
}

.qbank__row--editing {
    background: #fefce8;
}

.qbank__edit-input {
    width: 100%;
    padding: 0.375rem 0.5rem;
    border: 1px solid var(--color-primary);
    border-radius: 0.25rem;
    font-size: 0.875rem;
    background: var(--color-surface);
    color: var(--color-text);
    outline: none;
}

.qbank__edit-input:focus {
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--color-primary) 25%, transparent);
}

.qbank__action-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    border: none;
    border-radius: 0.25rem;
    cursor: pointer;
    background: transparent;
    color: var(--color-text-secondary);
    transition: all 0.15s;
}

.qbank__action-btn:hover {
    background: var(--color-bg);
}

.qbank__action-btn--edit:hover {
    color: var(--color-primary);
}

.qbank__action-btn--delete:hover {
    color: var(--color-error);
}

.qbank__action-btn--save {
    color: var(--color-success);
}

.qbank__action-btn--save:hover {
    background: #ecfdf5;
}

.qbank__action-btn--cancel:hover {
    color: var(--color-error);
    background: #fef2f2;
}

/* Expanded editor */
.qbank__td--editor {
    padding: 0 !important;
}

.qbank__editor {
    padding: 1.25rem;
    background: #fefce8;
    border-left: 3px solid var(--color-primary);
}

.qbank__editor-fields {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.qbank__editor-meta {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.qbank__editor-field {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.qbank__editor-field--full {
    position: relative;
}

.qbank__editor-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.qbank__edit-textarea {
    width: 100%;
    padding: 0.625rem 0.75rem;
    border: 1px solid var(--color-primary);
    border-radius: 0.25rem;
    font-size: 0.9375rem;
    font-family: var(--font-sans);
    background: var(--color-surface);
    color: var(--color-text);
    outline: none;
    resize: vertical;
    min-height: 4.5rem;
    line-height: 1.5;
}

.qbank__edit-textarea:focus {
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--color-primary) 25%, transparent);
}

.qbank__ai-btn {
    position: absolute;
    bottom: 0.5rem;
    right: 0.5rem;
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.3rem 0.625rem;
    border: 1px solid #c084fc;
    border-radius: 0.375rem;
    background: var(--color-accent-light);
    color: var(--color-accent);
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s, transform 0.1s;
}

.qbank__ai-btn:hover {
    background: #f3e8ff;
    border-color: #a855f7;
}

.qbank__ai-btn:active {
    transform: scale(0.97);
}

.qbank__ai-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.qbank__ai-btn--loading {
    animation: qbank-pulse 1.2s ease-in-out infinite;
}

@keyframes qbank-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.qbank__editor-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
}

@media (max-width: 48rem) {
    .qbank__editor-meta {
        grid-template-columns: 1fr;
    }
}

.qbank__loading,
.qbank__no-results {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--color-text-secondary);
}

.qbank__empty {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--color-text-secondary);
}

.qbank__empty svg {
    margin-bottom: 1rem;
}

.qbank__empty-hint {
    font-size: 0.8125rem;
    margin-top: 0.5rem;
    opacity: 0.7;
}

/* ─── Chat Question Bank Panel ───────────────────────────────────── */

.chat__qbank {
    width: 100%;
    max-width: 53.75rem;
    align-self: center;
    margin: 0.5rem auto 1.5rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 0.75rem;
    box-shadow: var(--shadow);
    overflow: hidden;
    overflow-y: auto;
    max-height: 40vh;
    animation: fadeInUp 0.3s ease-out both;
}

.chat__qbank-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.875rem 1.25rem;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-surface);
    flex-wrap: wrap;
}

.chat__qbank-title-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 0;
}

.chat__qbank-title {
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-text);
    letter-spacing: 0;
}

.chat__qbank-badge {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    background: #edeae4;
    padding: 0.125rem 0.5rem;
    border-radius: 999px;
    min-width: 1.25rem;
    text-align: center;
    line-height: 1.4;
}

.chat__qbank-badge:empty {
    display: none;
}

.chat__qbank-tabs {
    display: inline-flex;
    align-items: center;
    gap: 0.125rem;
    padding: 0.1875rem;
    background: #f2efe9;
    border-radius: 0.5rem;
    flex-wrap: nowrap;
}

.chat__qbank-tab {
    padding: 0.375rem 0.75rem;
    border: 1px solid transparent;
    border-radius: 0.375rem;
    background: transparent;
    color: var(--color-text-secondary);
    font-family: var(--font-sans);
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    text-transform: none;
    letter-spacing: 0;
    white-space: nowrap;
}

.chat__qbank-tab:hover {
    color: var(--color-text);
}

.chat__qbank-tab--active {
    background: #ffffff;
    border-color: rgba(15, 32, 68, 0.08);
    color: var(--color-text);
    box-shadow: 0 1px 2px rgba(15, 32, 68, 0.08);
}

.chat__qbank-tab--active:hover {
    background: #ffffff;
    color: var(--color-text);
}

.chat__qbank-tab[style*="--tab-color"].chat__qbank-tab--active {
    background: #ffffff;
    border-color: rgba(15, 32, 68, 0.08);
    color: var(--color-text);
}

.chat__qbank-audience-select {
    display: none !important;
}

.chat__qbank-list {
    overflow-y: auto;
    scrollbar-width: thin;
    padding: 0.75rem 1rem 1rem;
}

.chat__qbank-list::-webkit-scrollbar {
    width: 5px;
}

.chat__qbank-list::-webkit-scrollbar-track {
    background: transparent;
}

.chat__qbank-list::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 3px;
}

.chat__qbank-list::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-secondary);
}

.chat__qbank-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 2rem 1rem;
    color: var(--color-text-secondary);
    font-size: 0.8125rem;
}

.chat__qbank-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.625rem;
    padding: 2.5rem 1rem;
    color: var(--color-text-secondary);
    font-size: 0.8125rem;
    text-align: center;
}

.chat__qbank-empty p {
    margin: 0;
}

.chat__qbank-group {
    margin-bottom: 0.375rem;
}

.chat__qbank-group:last-child {
    margin-bottom: 0;
}

.chat__qbank-group-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem 0.25rem;
}

.chat__qbank-group-title {
    font-size: 0.625rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-secondary);
}

.chat__qbank-group-count {
    font-size: 0.5625rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    background: var(--color-bg);
    padding: 0.0625rem 0.375rem;
    border-radius: 999px;
    opacity: 0.7;
}

.chat__qbank-group-items {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.chat__qbank-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border: 1px solid transparent;
    border-radius: 0.5rem;
    background: #f3f0ea;
    cursor: pointer;
    text-align: left;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    color: var(--color-text);
    transition: all 0.15s ease;
    line-height: 1.5;
}

.chat__qbank-item:hover {
    background: #ebe7df;
    border-color: rgba(15, 32, 68, 0.08);
}

.chat__qbank-item:hover .chat__qbank-item-arrow {
    opacity: 1;
    transform: translateX(2px);
}

.chat__qbank-item:active {
    background: #e3dfd5;
    border-color: rgba(15, 32, 68, 0.14);
}

.chat__qbank-item-level {
    display: inline-flex;
    align-items: center;
    padding: 0.1875rem 0.5rem;
    border-radius: 0.375rem;
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 500;
    color: #3b5bdb;
    background: #eaf0ff;
    border: 1px solid transparent;
    white-space: nowrap;
    flex-shrink: 0;
    text-transform: none;
    letter-spacing: 0;
    line-height: 1.35;
}

.chat__qbank-item-text {
    flex: 1;
    min-width: 0;
}

.chat__qbank-item-arrow {
    flex-shrink: 0;
    color: var(--color-text-secondary);
    opacity: 0;
    transition: opacity 0.15s, transform 0.15s;
}

/* ─── Autocomplete Dropdown ──────────────────────────────────────── */

.chat__autocomplete {
    position: absolute;
    bottom: 100%;
    left: 1.5rem;
    right: 1.5rem;
    background: #fffdf8;
    border: 1.5px solid var(--color-primary);
    border-radius: var(--radius);
    box-shadow: 0 -6px 24px rgba(44, 74, 110, 0.12), 0 -2px 6px rgba(44, 74, 110, 0.06);
    max-height: 24rem;
    overflow-y: auto;
    z-index: 50;
    margin-bottom: 0.375rem;
}

.chat--welcome-state .chat__autocomplete {
    bottom: auto;
    top: 100%;
    margin-bottom: 0;
    margin-top: 0.375rem;
    box-shadow: 0 6px 24px rgba(44, 74, 110, 0.12), 0 2px 6px rgba(44, 74, 110, 0.06);
}

.chat__autocomplete-header {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 0.875rem;
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border-bottom: 1px solid color-mix(in srgb, var(--color-primary) 15%, transparent);
    background: #f9f6f1;
    position: sticky;
    top: 0;
    z-index: 1;
}

.chat__autocomplete-header svg {
    flex-shrink: 0;
    opacity: 0.7;
}

.chat__autocomplete-item {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    padding: 0.625rem 0.875rem;
    cursor: pointer;
    font-size: 0.8125rem;
    color: var(--color-text);
    border-bottom: 1px solid var(--color-border);
    transition: background 0.1s;
    line-height: 1.5;
}

.chat__autocomplete-item:last-child {
    border-bottom: none;
}

.chat__autocomplete-item:hover,
.chat__autocomplete-item--active {
    background: color-mix(in srgb, var(--color-primary) 6%, transparent);
}

.chat__autocomplete-level {
    display: inline-block;
    padding: 0.0625rem 0.375rem;
    border-radius: 999px;
    font-size: 0.625rem;
    font-weight: 600;
    color: var(--level-color);
    background: color-mix(in srgb, var(--level-color) 12%, transparent);
    border: 1px solid color-mix(in srgb, var(--level-color) 30%, transparent);
    white-space: nowrap;
    flex-shrink: 0;
    margin-top: 0.125rem;
}

.chat__autocomplete-text {
    flex: 1;
    line-height: 1.4;
}

.chat__autocomplete-text mark {
    background: #f5e6c8;
    color: inherit;
    border-radius: 2px;
    padding: 0 2px;
}

@media (max-width: 48rem) {
    .qbank__header {
        flex-direction: column;
    }

    .qbank__header-actions {
        width: 100%;
        flex-wrap: wrap;
    }

    .qbank__toolbar {
        flex-direction: column;
        align-items: stretch;
    }

    .chat__qbank-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* ── Cookie Consent Banner (modal overlay on login page) ───────────────── */

.cookie-banner-overlay {
    position: fixed;
    inset: 0;
    z-index: 900;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.5);
    animation: cookieFadeIn 0.25s ease-out;
}

@keyframes cookieFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.cookie-banner {
    position: relative;
    width: 100%;
    max-width: 24rem;
    margin: 1rem;
    padding: 1.5rem 1.5rem;
    background: var(--color-surface);
    border-radius: var(--radius-lg, 0.75rem);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.18);
    animation: cookieSlideUp 0.3s ease-out;
}

@keyframes cookieSlideUp {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (prefers-color-scheme: dark) {
    .cookie-banner {
        background: rgba(30, 30, 35, 0.98);
    }
}

.cookie-banner__inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    text-align: center;
}

.cookie-banner__icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.cookie-banner__text {
    flex: 1;
}

.cookie-banner__text strong {
    display: block;
    font-size: 0.875rem;
    color: var(--color-text);
    margin-bottom: 0.25rem;
}

.cookie-banner__text p {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    margin: 0;
}

.cookie-banner__policy-link {
    background: none;
    border: none;
    color: var(--color-primary);
    cursor: pointer;
    font-size: inherit;
    padding: 0;
    text-decoration: underline;
    text-underline-offset: 2px;
}

.cookie-banner__policy-link:hover {
    color: var(--color-primary-hover);
}

.cookie-banner__actions {
    display: flex;
    gap: 0.5rem;
    flex-shrink: 0;
    width: 100%;
}

.cookie-banner__accept {
    flex: 1;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    padding: 0.5rem 1rem;
    font-size: 0.8125rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s;
    white-space: nowrap;
}

.cookie-banner__accept:hover {
    background: var(--color-primary-hover);
}

.cookie-banner__decline {
    flex: 1;
    background: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    color: var(--color-text-secondary);
    padding: 0.5rem 1rem;
    font-size: 0.8125rem;
    cursor: pointer;
    transition: border-color 0.15s, color 0.15s;
    white-space: nowrap;
}

.cookie-banner__decline:hover {
    border-color: var(--color-error);
    color: var(--color-error);
}

.cookie-banner__declined {
    width: 100%;
    padding: 0.625rem 0.75rem;
    background: color-mix(in srgb, var(--color-error) 8%, transparent);
    border: 1px solid color-mix(in srgb, var(--color-error) 30%, transparent);
    border-radius: var(--radius);
    color: var(--color-error);
    font-size: 0.75rem;
    line-height: 1.4;
    text-align: center;
}

.cookie-banner__retry {
    background: none;
    border: none;
    color: var(--color-primary);
    cursor: pointer;
    font-size: 0.75rem;
    margin-left: 0.25rem;
    padding: 0;
    text-decoration: underline;
    text-underline-offset: 2px;
}

.cookie-banner__retry:hover {
    color: var(--color-primary-hover);
}

/* Cookie Policy Modal */

.cookie-policy-modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

.cookie-policy-modal__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
}

.cookie-policy-modal__content {
    position: relative;
    background: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
    max-width: 38rem;
    width: 100%;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
}

.cookie-policy-modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--color-border);
    flex-shrink: 0;
}

.cookie-policy-modal__title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text);
}

.cookie-policy-modal__close {
    background: none;
    border: none;
    color: var(--color-text-secondary);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 4px;
    display: flex;
    align-items: center;
    transition: color 0.15s;
}

.cookie-policy-modal__close:hover {
    color: var(--color-text);
}

.cookie-policy-modal__body {
    overflow-y: auto;
    overflow-x: auto;
    padding: 1.5rem;
    flex: 1;
    font-size: 0.9375rem;
    line-height: 1.7;
    color: var(--color-text);
}

.cookie-policy-modal__body h3 {
    font-size: 0.9375rem;
    font-weight: 700;
    margin: 1.25rem 0 0.5rem;
    color: var(--color-text);
}

.cookie-policy-modal__body h3:first-child {
    margin-top: 0;
}

.cookie-policy-modal__body p {
    color: var(--color-text-secondary);
    margin-bottom: 0.5rem;
}

.cookie-policy-modal__body table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
    margin: 0.75rem 0 1rem;
}

.cookie-policy-modal__body th {
    background: var(--color-bg);
    padding: 0.5rem 0.75rem;
    text-align: left;
    font-weight: 600;
    border: 1px solid var(--color-border);
    color: var(--color-text);
}

.cookie-policy-modal__body td {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    vertical-align: top;
}

.cookie-policy-modal__footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: flex-end;
    flex-shrink: 0;
}

@media (max-width: 32rem) {
    .cookie-policy-modal__content {
        max-height: 92vh;
    }
}

/* ─── Profile view ──────────────────────────────────────────────── */

.profile {
    max-width: 32rem;
    margin: 3rem auto;
    padding: 0 1rem;
}

.profile__card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
}

.profile__header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.profile__avatar {
    width: 3.5rem;
    height: 3.5rem;
    border-radius: 50%;
    background: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    flex-shrink: 0;
}

.profile__title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
}

.profile__loading {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    padding: 1rem 0;
}

.profile__details {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.profile__field {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.profile__label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
}

.profile__value {
    font-size: 0.9375rem;
    color: var(--color-text);
    background: var(--color-bg);
    padding: 0.625rem 0.75rem;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    word-break: break-all;
}

.profile__error {
    color: var(--color-error);
    font-size: 0.875rem;
    padding: 1rem 0;
}

.profile__divider {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: 1.5rem 0;
}

.profile__success-banner {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    background: #f0fdf4;
    border: 1px solid #86efac;
    border-radius: var(--radius);
    padding: 0.875rem 1rem;
    margin-bottom: 1.25rem;
    color: #15803d;
    font-size: 0.9375rem;
    font-weight: 500;
}

.profile__success-banner svg {
    flex-shrink: 0;
    color: #16a34a;
}

.profile__info-banner {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    background: #eff6ff;
    border: 1px solid #93c5fd;
    border-radius: var(--radius);
    padding: 0.875rem 1rem;
    margin-bottom: 1.25rem;
    color: #1d4ed8;
    font-size: 0.9375rem;
    font-weight: 500;
}

.profile__info-banner svg {
    flex-shrink: 0;
}

.profile__sub-status {
    display: inline-block;
    font-size: 0.8125rem;
    font-weight: 500;
    padding: 0.2rem 0.6rem;
    border-radius: 999px;
    margin-top: 0.5rem;
}

.profile__sub-status--active {
    background: #dcfce7;
    color: #15803d;
}

.profile__sub-status--cancelling {
    background: #fef3c7;
    color: #92400e;
}

.profile__cancellation-notice {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    background: #fffbeb;
    border: 1px solid #fcd34d;
    border-radius: var(--radius);
    padding: 0.625rem 0.875rem;
    font-size: 0.875rem;
    color: #78350f;
    line-height: 1.4;
}

.profile__cancellation-notice svg {
    flex-shrink: 0;
    margin-top: 1px;
    color: #d97706;
}

.profile__danger {
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: var(--radius);
    padding: 1.25rem;
}

.profile__danger-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-error);
    margin-bottom: 0.5rem;
}

.profile__danger-text {
    font-size: 0.8125rem;
    color: #991b1b;
    line-height: 1.5;
    margin-bottom: 1rem;
}

.profile__delete-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--color-error);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s;
}

.profile__delete-btn:hover {
    background: #dc2626;
}

.profile__delete-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.profile__confirm {
    margin-top: 1rem;
    padding: 1rem;
    background: #fff;
    border: 1px solid #fca5a5;
    border-radius: var(--radius);
}

.profile__confirm-text {
    font-size: 0.8125rem;
    color: #991b1b;
    line-height: 1.5;
    margin-bottom: 0.75rem;
}

.profile__confirm-input {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-family: var(--font-mono);
    letter-spacing: 0.05em;
    margin-bottom: 0.75rem;
    outline: none;
    transition: border-color 0.15s;
}

.profile__confirm-input:focus {
    border-color: var(--color-error);
    box-shadow: 0 0 0 2px rgba(239, 68, 68, 0.15);
}

.profile__confirm-actions {
    display: flex;
    gap: 0.5rem;
    justify-content: flex-end;
}

.profile__confirm-cancel {
    padding: 0.5rem 1rem;
    background: var(--color-surface);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s;
}

.profile__confirm-cancel:hover {
    background: var(--color-bg);
}

.profile__confirm-submit {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--color-error);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s, opacity 0.15s;
}

.profile__confirm-submit:hover:not(:disabled) {
    background: #dc2626;
}

.profile__confirm-submit:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.spinner--small {
    width: 1rem;
    height: 1rem;
    border-width: 2px;
}

/* ─── Welcome Popup (first-time users) ───────────────────────── */

.welcome-popup {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.welcome-popup--visible {
    opacity: 1;
    pointer-events: auto;
}

.welcome-popup__backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(4px);
}

.welcome-popup__card {
    position: relative;
    background: var(--color-surface);
    border-radius: 1rem;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15), 0 4px 20px rgba(0, 0, 0, 0.08);
    max-width: 540px;
    width: 90%;
    max-height: 80vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2.5rem 2rem 2rem;
    animation: welcomeSlideUp 0.4s ease;
}

@keyframes welcomeSlideUp {
    from {
        transform: translateY(24px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.welcome-popup__icon {
    width: 3.5rem;
    height: 3.5rem;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent, #6b4c8a));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    margin-bottom: 1.25rem;
    box-shadow: 0 4px 12px rgba(44, 74, 110, 0.25);
    flex-shrink: 0;
}

.welcome-popup__body {
    font-family: var(--font-serif);
    font-size: 0.9375rem;
    line-height: 1.75;
    color: var(--color-text);
    text-align: left;
    margin-bottom: 1.75rem;
    max-width: 460px;
    overflow-y: auto;
    flex: 1 1 auto;
    min-height: 0;
}

.welcome-popup__body p {
    margin-bottom: 0.75rem;
}

.welcome-popup__body p:last-child {
    margin-bottom: 0;
}

.welcome-popup__body h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.welcome-popup__body h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.welcome-popup__body h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.welcome-popup__body ul,
.welcome-popup__body ol {
    text-align: left;
    padding-left: 1.5rem;
    margin-bottom: 0.75rem;
}

.welcome-popup__body li {
    margin-bottom: 0.35rem;
}

.welcome-popup__body strong {
    font-weight: 600;
    color: var(--color-primary);
}

.welcome-popup__body em {
    font-style: italic;
}

.welcome-popup__body code {
    font-family: var(--font-mono);
    font-size: 0.85em;
    background: var(--color-bg);
    padding: 0.1em 0.35em;
    border-radius: 3px;
}

.welcome-popup__body a {
    color: var(--color-primary);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.welcome-popup__body a:hover {
    color: var(--color-primary-hover);
}

.welcome-popup__close-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.75rem;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: 0.5rem;
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
    box-shadow: 0 2px 8px rgba(44, 74, 110, 0.2);
    flex-shrink: 0;
}

.welcome-popup__close-btn:hover {
    background: var(--color-primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(44, 74, 110, 0.3);
}

.welcome-popup__close-btn:active {
    transform: translateY(0);
}

/* ─── Welcome popup action buttons (3-button layout) ─────────────── */

.welcome-popup__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.625rem;
    justify-content: center;
    width: 100%;
    flex-shrink: 0;
}

.welcome-popup__btn {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.625rem 1.125rem;
    border-radius: 0.5rem;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s, color 0.15s, border-color 0.15s, transform 0.12s, box-shadow 0.15s;
    white-space: nowrap;
}

.welcome-popup__btn--dismiss {
    background: transparent;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
}

.welcome-popup__btn--dismiss:hover {
    background: var(--color-bg);
    color: var(--color-text);
    border-color: var(--color-text-secondary);
}

.welcome-popup__btn--onboarding {
    background: var(--color-primary);
    color: #fff;
    border: 1px solid transparent;
    box-shadow: 0 2px 8px rgba(44, 74, 110, 0.2);
}

.welcome-popup__btn--onboarding:hover {
    background: var(--color-primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(44, 74, 110, 0.3);
}

.welcome-popup__btn--onboarding:active {
    transform: translateY(0);
}

/* ─── Nav help (?) button ─────────────────────────────────────────── */

.nav__help {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.375rem;
    height: 1.375rem;
    padding: 0;
    margin-left: 0.375rem;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: 50%;
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: background 0.15s, color 0.15s, border-color 0.15s;
    flex-shrink: 0;
}

.nav__help:hover {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.nav__help-icon {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
    color: currentColor;
    display: block;
}

.admin__textarea--markdown {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    line-height: 1.7;
    min-height: 8rem;
    resize: vertical;
}

@media (max-width: 600px) {
    .welcome-popup__card {
        padding: 2rem 1.25rem 1.5rem;
        border-radius: 0.75rem;
        max-width: 95%;
        max-height: 90vh;
    }

    .welcome-popup__body {
        font-size: 0.875rem;
    }

    .welcome-popup__btn {
        white-space: normal;
        text-align: center;
        justify-content: center;
        flex: 1 1 auto;
        min-width: 0;
    }

    .welcome-popup__actions {
        gap: 0.5rem;
    }
}

/* ─── Billing Admin ──────────────────────────────────────────────── */

.billing-admin {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem 1.5rem 3rem;
}

.billing-admin__header { margin-bottom: 2rem; }

.billing-admin__title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: 0.625rem;
}

.billing-admin__title svg { color: var(--color-primary); flex-shrink: 0; }

.billing-admin__subtitle {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-top: 0.25rem;
    padding-left: 2.125rem;
}

/* Summary stat strip */
.billing-admin__summary {
    display: flex;
    gap: 1px;
    background: var(--color-border);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
}

.billing-admin__summary-loading {
    padding: 1.25rem;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    width: 100%;
    text-align: center;
    background: var(--color-surface);
}

.billing-admin__stat {
    flex: 1;
    padding: 1.125rem 1.25rem;
    background: var(--color-surface);
    text-align: center;
}

.billing-admin__stat--primary { background: var(--color-surface); }

.billing-admin__stat-value {
    display: block;
    font-size: 1.625rem;
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.2;
}

.billing-admin__stat-label {
    display: block;
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-text-secondary);
    margin-top: 0.25rem;
}

/* Cards grid */
.billing-admin__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
    margin-bottom: 1.25rem;
}

.billing-admin__card {
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.billing-admin__card--full { grid-column: 1 / -1; }

.billing-admin__card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.875rem 1.25rem;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-bg);
}

.billing-admin__card-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0;
}

.billing-admin__card-title svg { color: var(--color-text-secondary); flex-shrink: 0; }

.billing-admin__card-body { padding: 1.25rem; }

.billing-admin__card-desc {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    margin: 0 0 1rem;
    line-height: 1.5;
}

/* Free tier inline field */
.billing-admin__inline-field { display: flex; flex-direction: column; gap: 0.5rem; }

.billing-admin__field-label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.billing-admin__inline-input {
    display: flex;
    align-items: center;
    gap: 0.625rem;
}

.billing-admin__input {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.875rem;
    width: 100%;
    background: var(--color-surface);
    color: var(--color-text);
    transition: border-color 0.15s;
}

.billing-admin__input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(44, 74, 110, 0.12);
}

.billing-admin__input--compact { width: 80px; text-align: center; font-weight: 600; font-size: 1rem; }

.billing-admin__textarea { resize: vertical; min-height: 3rem; font-family: inherit; }

.billing-admin__field-hint { font-size: 0.75rem; color: var(--color-text-secondary); font-weight: 400; }

/* Revenue breakdown bars */
.billing-admin__dist-row { padding: 0.625rem 0; }
.billing-admin__dist-row + .billing-admin__dist-row { border-top: 1px solid var(--color-border); }

.billing-admin__dist-info { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 0.375rem; }
.billing-admin__dist-name { font-size: 0.8125rem; font-weight: 600; color: var(--color-text); }
.billing-admin__dist-detail { font-size: 0.75rem; color: var(--color-text-secondary); }

.billing-admin__dist-bar-bg {
    height: 6px;
    background: var(--color-bg);
    border-radius: 999px;
    overflow: hidden;
}

.billing-admin__dist-bar {
    height: 100%;
    background: var(--color-primary);
    border-radius: 999px;
    transition: width 0.3s ease;
}

/* Badges */
.billing-admin__badge {
    display: inline-block;
    padding: 0.125rem 0.5rem;
    border-radius: 999px;
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.billing-admin__badge--active { background: #dcfce7; color: #166534; }
.billing-admin__badge--inactive { background: #e5e7eb; color: #4b5563; }
.billing-admin__badge--student { background: #ede9fe; color: #5b21b6; }
.billing-admin__badge--warn { background: #fef3c7; color: #92400e; }

/* Buttons */
.billing-admin__btn {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.4375rem 0.875rem;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text);
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
}

.billing-admin__btn:hover { background: var(--color-bg); }
.billing-admin__btn:disabled { opacity: 0.5; cursor: not-allowed; }

.billing-admin__btn--primary { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.billing-admin__btn--primary:hover { background: var(--color-primary-hover); border-color: var(--color-primary-hover); }

.billing-admin__btn--compact { padding: 0.375rem 0.75rem; }

.billing-admin__btn--ghost { background: transparent; border-color: transparent; color: var(--color-text-secondary); }
.billing-admin__btn--ghost:hover { background: var(--color-bg); color: var(--color-text); }

.billing-admin__btn--sm { padding: 0.25rem 0.625rem; font-size: 0.75rem; border-radius: var(--radius); }

.billing-admin__btn--outline { background: transparent; color: var(--color-text); }
.billing-admin__btn--outline:hover { background: var(--color-bg); }

.billing-admin__btn--secondary { background: var(--color-surface); color: var(--color-text); border-color: var(--color-border); }
.billing-admin__btn--secondary:hover { background: var(--color-bg); }

.billing-admin__btn--danger { background: #dc2626; color: #fff; border-color: #dc2626; }
.billing-admin__btn--danger:hover { background: #b91c1c; border-color: #b91c1c; }

.billing-admin__btn--danger-outline { background: transparent; color: var(--color-error); border-color: #f5c6cb; }
.billing-admin__btn--danger-outline:hover { background: #fef2f2; }

/* Save status */
.billing-admin__save-status { font-size: 0.8125rem; font-weight: 500; transition: opacity 0.2s; }
.billing-admin__save-status--ok { color: var(--color-success); }
.billing-admin__save-status--err { color: var(--color-error); }

/* Loading / empty states */
.billing-admin__loading {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    padding: 1.5rem;
    text-align: center;
}

.billing-admin__empty {
    color: var(--color-text-secondary);
    font-size: 0.8125rem;
    padding: 0.5rem 0;
    line-height: 1.5;
}

.billing-admin__empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    padding: 2.5rem 1rem;
    text-align: center;
    color: var(--color-text-secondary);
}

.billing-admin__empty-state svg { opacity: 0.35; }
.billing-admin__empty-state h4 { font-size: 1rem; font-weight: 600; color: var(--color-text); margin: 0; }
.billing-admin__empty-state p { font-size: 0.875rem; margin: 0; max-width: 320px; }
.billing-admin__empty-state--compact { padding: 1.5rem 1rem; }
.billing-admin__empty-state--compact svg { width: 28px; height: 28px; }

/* Plans grid (card layout) */
.billing-admin__plans-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1rem;
}

.billing-admin__plan-card {
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
    display: flex;
    flex-direction: column;
    transition: border-color 0.15s, box-shadow 0.15s;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.billing-admin__plan-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
}

.billing-admin__plan-card--inactive { opacity: 0.6; }
.billing-admin__plan-card--student { border-left: 3px solid #8b5cf6; }

.billing-admin__plan-card-top { padding: 1.25rem 1.25rem 0.75rem; flex: 1; }

.billing-admin__plan-card-badges { display: flex; gap: 0.375rem; margin-bottom: 0.625rem; }

.billing-admin__plan-card-name {
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--color-text);
    margin: 0 0 0.375rem;
}

.billing-admin__plan-card-price {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--color-text);
    line-height: 1.1;
    margin-bottom: 0.375rem;
}

.billing-admin__plan-card-period {
    font-size: 0.8125rem;
    font-weight: 400;
    color: var(--color-text-secondary);
}

/* Multi-currency prices display */
.billing-admin__plan-card-prices {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
    margin-bottom: 0.5rem;
}

.billing-admin__plan-card-currency-tag {
    display: inline-block;
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-text);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    padding: 0.1875rem 0.5rem;
    border-radius: var(--radius);
}

.billing-admin__plan-card-currency-tag small {
    font-size: 0.6875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-left: 0.125rem;
}

/* Modal pricing grid */
.billing-admin__prices-grid {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 0.375rem;
}

.billing-admin__price-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.billing-admin__price-currency {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-text);
    min-width: 48px;
    text-align: right;
}

.billing-admin__plan-card-limit {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    margin-bottom: 0.5rem;
}

.billing-admin__plan-card-limit svg { flex-shrink: 0; }

.billing-admin__plan-card-desc {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    line-height: 1.4;
    margin-bottom: 0.5rem;
}

.billing-admin__plan-card-features {
    list-style: none;
    padding: 0;
    margin: 0.25rem 0 0;
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

.billing-admin__plan-card-features li {
    padding: 0.1875rem 0;
}

.billing-admin__plan-card-features li::before {
    content: "\2713  ";
    color: var(--color-success);
    font-weight: 700;
}

.billing-admin__plan-card-actions {
    display: flex;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    border-top: 1px solid var(--color-border);
    background: var(--color-bg);
}

.billing-admin__plan-card-meta {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.5rem 1.25rem;
    border-top: 1px solid var(--color-border);
    font-size: 0.75rem;
}

.billing-admin__plan-card-meta code {
    background: var(--color-bg);
    padding: 0.0625rem 0.375rem;
    border-radius: var(--radius);
    font-size: 0.6875rem;
    color: var(--color-text-secondary);
}

.billing-admin__stripe-connected {
    color: var(--color-success);
    font-weight: 600;
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.billing-admin__stripe-missing {
    color: var(--color-text-secondary);
    font-size: 0.6875rem;
    font-style: italic;
}

/* Subscriptions table */
.billing-admin__table-wrap { overflow-x: auto; }

.billing-admin__table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8125rem;
}

.billing-admin__table th {
    text-align: left;
    padding: 0.625rem 0.75rem;
    font-weight: 600;
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
    border-bottom: 2px solid var(--color-border);
    white-space: nowrap;
}

.billing-admin__table td {
    padding: 0.625rem 0.75rem;
    border-bottom: 1px solid var(--color-border);
    vertical-align: middle;
}

.billing-admin__table tbody tr:hover { background: var(--color-bg); }

.billing-admin__cell-email { font-weight: 500; }
.billing-admin__cell-price { font-weight: 600; font-variant-numeric: tabular-nums; }
.billing-admin__cell-date { color: var(--color-text-secondary); white-space: nowrap; }
.billing-admin__cell-muted { color: var(--color-text-secondary); }

.billing-admin__plan-tag {
    display: inline-block;
    padding: 0.125rem 0.5rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-weight: 500;
    font-size: 0.75rem;
}

/* Modal */
.billing-admin__modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: billing-modal-fade 0.15s ease;
}

@keyframes billing-modal-fade {
    from { opacity: 0; }
    to { opacity: 1; }
}

.billing-admin__modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(2px);
}

.billing-admin__modal-content {
    position: relative;
    background: var(--color-surface);
    border-radius: var(--radius);
    width: 100%;
    max-width: 540px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.18);
    animation: billing-modal-slide 0.2s ease;
}

@keyframes billing-modal-slide {
    from { transform: translateY(16px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.billing-admin__modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.billing-admin__modal-title {
    font-size: 1.0625rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0;
}

.billing-admin__modal-title svg { color: var(--color-primary); }

.billing-admin__modal-close {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text-secondary);
    padding: 0.25rem;
    border-radius: var(--radius);
    transition: background 0.15s;
}

.billing-admin__modal-close:hover { background: var(--color-bg); color: var(--color-text); }

.billing-admin__form { padding: 1.25rem 1.5rem 1.5rem; }

.billing-admin__form-group { margin-bottom: 1rem; }

.billing-admin__form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}

/* Toggle switches */
.billing-admin__form-toggles {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
    padding: 1rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}

.billing-admin__toggle {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    font-size: 0.8125rem;
}

.billing-admin__toggle input { display: none; }

.billing-admin__toggle-slider {
    position: relative;
    width: 36px;
    height: 20px;
    background: var(--color-border);
    border-radius: 999px;
    transition: background 0.2s;
    flex-shrink: 0;
}

.billing-admin__toggle-slider::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 16px;
    height: 16px;
    background: #fff;
    border-radius: 50%;
    transition: transform 0.2s;
    box-shadow: 0 1px 3px rgba(0,0,0,0.15);
}

.billing-admin__toggle input:checked + .billing-admin__toggle-slider {
    background: var(--color-primary);
}

.billing-admin__toggle input:checked + .billing-admin__toggle-slider::after {
    transform: translateX(16px);
}

.billing-admin__toggle-label { color: var(--color-text); font-weight: 500; }

.billing-admin__form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
}

@media (max-width: 640px) {
    .billing-admin__grid { grid-template-columns: 1fr; }
    .billing-admin__summary { flex-direction: column; }
    .billing-admin__plans-grid { grid-template-columns: 1fr; }
    .billing-admin__form-row { grid-template-columns: 1fr; }
}

/* ─── Profile Subscription Section ───────────────────────────────── */

.profile__subscription {
    margin-bottom: 1.5rem;
}

.profile__subtitle {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.75rem;
}

.profile__sub-loading {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    padding: 0.5rem 0;
}

.profile__muted {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.profile__sub-content {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.profile__sub-plan-card {
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
    padding: 0.875rem 1rem;
    background: var(--color-bg);
    border-radius: 8px;
    border: 1px solid var(--color-border);
}

.profile__sub-plan-card-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.profile__plan-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: 0.875rem;
    font-weight: 600;
}

.profile__plan-badge--free {
    background: #f3f4f6;
    color: #374151;
}

.profile__plan-badge--bronze {
    background: #fef3c7;
    color: #92400e;
}

.profile__plan-badge--gold {
    background: #fef9c3;
    color: #854d0e;
}

.profile__plan-badge--platinum {
    background: linear-gradient(135deg, #e0e7ff, #c7d2fe);
    color: #3730a3;
}

.profile__student-badge {
    display: inline-block;
    margin-left: 0.375rem;
    padding: 0.0625rem 0.375rem;
    background: #ede9fe;
    color: #5b21b6;
    border-radius: 999px;
    font-size: 0.6875rem;
    font-weight: 500;
}

.profile__plan-details {
    display: flex;
    gap: 1rem;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.profile__plan-price {
    font-weight: 600;
    color: var(--color-text);
}

.profile__sub-quota {
    margin-top: 0.25rem;
}

.profile__quota-bar-wrap {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.profile__quota-label {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.profile__quota-bar {
    width: 100%;
    height: 8px;
    background: var(--color-bg);
    border-radius: 999px;
    overflow: hidden;
}

.profile__quota-bar-fill {
    height: 100%;
    background: var(--color-primary);
    border-radius: 999px;
    transition: width 0.3s ease;
}

.profile__quota-bar-fill--warn {
    background: var(--color-warning);
}

.profile__quota-reset {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
}

.profile__sub-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.profile__btn {
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    border: 1px solid transparent;
    transition: background 0.15s;
}

.profile__btn--primary {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.profile__btn--primary:hover {
    background: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
}

.profile__btn--secondary {
    background: var(--color-bg);
    color: var(--color-text);
    border-color: var(--color-border);
}

.profile__btn--secondary:hover {
    background: var(--color-border);
}

.profile__btn--outline {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.profile__btn--outline:hover {
    background: var(--color-bg);
}

.profile__btn--ghost {
    background: transparent;
    color: var(--color-text-secondary);
    border-color: transparent;
}

.profile__btn--ghost:hover {
    background: var(--color-bg);
    color: var(--color-text);
}

.profile__btn--danger {
    background: #dc2626;
    color: #fff;
    border-color: #dc2626;
}

.profile__btn--danger:hover {
    background: #b91c1c;
    border-color: #b91c1c;
}

.profile__btn--danger-outline {
    background: transparent;
    color: #dc2626;
    border-color: #dc2626;
}

.profile__btn--danger-outline:hover {
    background: #fef2f2;
}

.profile__btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.profile__cancel-confirm {
    display: flex;
    flex-direction: column;
    gap: 0.875rem;
    padding: 1rem;
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: var(--radius);
}

.profile__cancel-confirm-text {
    font-size: 0.875rem;
    color: #7f1d1d;
    margin: 0;
    line-height: 1.5;
}

.profile__cancel-confirm-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.profile__action-error {
    font-size: 0.8125rem;
    color: #dc2626;
    margin: 0 0 0.5rem;
}

/* Plans grid */
.profile__plans-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1rem;
    margin-top: 0.75rem;
}

.profile__plan-card {
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.25rem;
    background: var(--color-surface);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    transition: border-color 0.15s, box-shadow 0.15s;
    box-shadow: var(--shadow);
}

.profile__plan-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
}

.profile__plan-card--current {
    border-color: var(--color-primary);
    background: var(--color-bg);
}

.profile__plan-card--student {
    border-color: #c4b5fd;
}

.profile__plan-card-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
}

.profile__plan-card-price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
}

.profile__plan-card-price span {
    font-size: 0.875rem;
    font-weight: 400;
    color: var(--color-text-secondary);
}

.profile__plan-card-limit {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

.profile__plan-card-desc {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    margin-top: 0.25rem;
}

.profile__plan-card-features {
    list-style: none;
    padding: 0;
    margin: 0.375rem 0 0;
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

.profile__plan-card-features li::before {
    content: "\2713 ";
    color: var(--color-success);
    font-weight: 700;
}

.profile__plan-card-current {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.profile__plan-card-btn {
    margin-top: auto;
    width: 100%;
    text-align: center;
}

.profile__plan-card-ineligible {
    font-size: 0.75rem;
    color: #9ca3af;
    font-style: italic;
    margin-top: auto;
}

.profile__currency-selector {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--color-border);
    width: 100%;
}

.profile__currency-label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-text-secondary);
}

.profile__currency-btn {
    padding: 0.375rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
    color: var(--color-text-secondary);
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
}

.profile__currency-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.profile__currency-btn--active {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.profile__currency-btn--active:hover {
    color: #fff;
}

/* ─── Chat Quota Indicator ───────────────────────────────────────── */

.chat__form-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding-right: 0.25rem;
}

.chat__form-footer-left {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem 0.75rem;
    min-width: 0;
}

.chat__footer-divider {
    width: 1px;
    height: 1.25rem;
    background: var(--color-border);
    flex-shrink: 0;
}

/* ── Peer-reviewed sources toggle ──────────────────────────────────── */

.chat__peer-reviewed-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    cursor: pointer;
    user-select: none;
    flex-shrink: 0;
}

.chat__peer-reviewed-toggle__input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
    pointer-events: none;
}

.chat__peer-reviewed-toggle__track {
    position: relative;
    display: inline-block;
    width: 28px;
    height: 16px;
    background: var(--color-border, #d1d5db);
    border-radius: 9999px;
    transition: background 0.2s;
    flex-shrink: 0;
}

.chat__peer-reviewed-toggle__thumb {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 12px;
    height: 12px;
    background: #fff;
    border-radius: 50%;
    transition: transform 0.2s;
    box-shadow: 0 1px 3px rgba(0,0,0,0.18);
}

.chat__peer-reviewed-toggle__input:checked ~ .chat__peer-reviewed-toggle__track {
    background: #059669;
}

.chat__peer-reviewed-toggle__input:checked ~ .chat__peer-reviewed-toggle__track .chat__peer-reviewed-toggle__thumb {
    transform: translateX(12px);
}

.chat__peer-reviewed-toggle__text {
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    letter-spacing: 0.01em;
    white-space: nowrap;
    transition: color 0.2s;
}

.chat__peer-reviewed-toggle:has(.chat__peer-reviewed-toggle__input:checked) .chat__peer-reviewed-toggle__text {
    color: #059669;
}

.chat__quota-indicator {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.125rem 0.625rem;
}

.chat__quota-text {
    font-size: 11px;
    color: var(--color-text-secondary);
    white-space: nowrap;
}

.chat__quota-text--exhausted {
    color: var(--color-error);
    font-weight: 600;
}

.chat__quota-reset {
    font-size: 0.6875rem;
    color: var(--color-text-secondary);
    opacity: 0.7;
    order: 3;
    flex-basis: 100%;
}

.chat__quota-upgrade-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0.65rem;
    font-size: 0.7rem;
    font-weight: 600;
    color: #fff;
    background: var(--color-primary);
    border-radius: 999px;
    text-decoration: none;
    white-space: nowrap;
    transition: background 0.15s ease, transform 0.15s ease;
}

.chat__quota-upgrade-btn:hover {
    background: var(--color-primary-hover, #4338ca);
    transform: translateY(-1px);
}

.chat__quota-upgrade-btn:active {
    transform: translateY(0);
}

.chat__quota-exceeded {
    padding: 0.75rem 1rem;
    background: #fef2f2;
    border: 1px solid #fca5a5;
    border-radius: var(--radius);
    color: #991b1b;
}

.chat__quota-exceeded strong {
    display: block;
    margin-bottom: 0.25rem;
}

.chat__quota-exceeded p {
    margin: 0;
    font-size: 0.875rem;
}

.chat__quota-exceeded a {
    color: var(--color-primary);
    font-weight: 500;
}

/* ─── Admin Provider Badges ─────────────────────────────────────── */

.admin__provider-badge {
    display: inline-block;
    padding: 0.125rem 0.5rem;
    border-radius: 9999px;
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    vertical-align: middle;
    margin-right: 0.375rem;
}

.admin__provider-badge--active {
    background: #dcfce7;
    color: #166534;
}

.admin__provider-badge--inactive {
    background: #f3f4f6;
    color: #6b7280;
}

.admin__provider-badge--pending {
    background: #fef3c7;
    color: #92400e;
}

/* ─── Models Admin Page ─────────────────────────────────────────── */

.models__toolbar {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 0.75rem;
}

.models__search {
    flex: 1 1 200px;
    min-width: 200px;
}

.models__toolbar-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.btn--sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.8125rem;
}

.models__count-badge {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: 0.125rem 0.5rem;
    border-radius: 9999px;
}

.models__list {
    display: flex;
    flex-direction: column;
    gap: 1px;
    max-height: 480px;
    overflow-y: auto;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-border);
}

.models__item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 0.875rem;
    background: var(--color-surface);
    cursor: pointer;
    transition: background 0.1s ease;
    user-select: none;
}

.models__item:hover {
    background: #f9fafb;
}

.models__item--enabled {
    background: #f0fdf4;
}

.models__item--enabled:hover {
    background: #dcfce7;
}

.models__toggle {
    flex-shrink: 0;
    width: 1rem;
    height: 1rem;
    accent-color: var(--color-primary);
    cursor: pointer;
}

.models__item-info {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
    min-width: 0;
}

.models__item-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.models__item-id {
    font-size: 0.6875rem;
    color: var(--color-text-secondary);
    font-family: monospace;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.models__item-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex: 1;
    min-width: 0;
    cursor: pointer;
}

.models__test-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.15s ease;
    flex-shrink: 0;
}

.models__test-btn:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
    background: var(--color-primary-light, #eff6ff);
}

.models__item-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
}

.models__max-tokens-input {
    width: 5.5rem;
    padding: 0.2rem 0.35rem;
    font-size: 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    text-align: right;
    color: var(--color-text);
    background: var(--color-surface);
}

.models__max-tokens-input::placeholder {
    color: var(--color-text-secondary);
    font-style: italic;
}

.models__max-tokens-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.15);
}

.models__item-meta {
    font-size: 0.6875rem;
    color: var(--color-text-secondary);
}

.models__zdr-toggle {
    display: inline-flex;
    align-items: center;
    cursor: pointer;
    flex-shrink: 0;
}

.models__zdr-toggle input {
    display: none;
}

.models__zdr-badge {
    display: inline-block;
    font-size: 0.625rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.1rem 0.35rem;
    border-radius: 3px;
    background: #dbeafe;
    color: #1d4ed8;
    vertical-align: middle;
    margin-left: 0.25rem;
}

.models__zdr-badge--toggleable {
    background: #e5e7eb;
    color: #9ca3af;
    cursor: pointer;
    transition: all 0.15s ease;
    margin-left: 0;
}

.models__zdr-badge--toggleable:hover {
    background: #dbeafe;
    color: #3b82f6;
}

.models__zdr-badge--on {
    background: #1d4ed8;
    color: #fff;
}

/* ─── BYOK row ─── */

.byok__row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.byok__input {
    flex: 1;
    max-width: 22rem;
    font-family: monospace;
    font-size: 0.875rem;
}

/* ─── Test result styles ─── */

.models__test-result {
    border-radius: var(--radius);
    padding: 1rem;
}

.models__test-result--ok {
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
}

.models__test-result--fail {
    background: #fef2f2;
    border: 1px solid #fecaca;
}

.models__test-status {
    font-weight: 600;
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.models__test-result--ok .models__test-status {
    color: #16a34a;
}

.models__test-result--fail .models__test-status {
    color: #dc2626;
}

.models__test-response {
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--color-text);
    word-break: break-word;
    white-space: pre-wrap;
}

.models__test-meta {
    margin-top: 0.5rem;
    font-size: 0.75rem;
    color: var(--color-text-secondary);
}

/* ─── Generic modal ─── */

.modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(2px);
}

.modal-overlay[hidden] {
    display: none;
}

.modal {
    background: var(--color-surface);
    border-radius: 0.75rem;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
}

.modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--color-border);
}

.modal__title {
    font-size: 1rem;
    font-weight: 600;
    margin: 0;
    color: var(--color-text);
}

.modal__close {
    background: none;
    border: none;
    font-size: 1.5rem;
    line-height: 1;
    cursor: pointer;
    color: var(--color-text-secondary);
    padding: 0 0.25rem;
}

.modal__close:hover {
    color: var(--color-text);
}

.modal__body {
    padding: 1.25rem;
}

/* ===== Tag Chips (academic keyword style) ===== */

.tag-chip-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.3rem;
    align-items: center;
}

.tag-chip {
    display: inline-flex;
    align-items: center;
    font-size: 0.68rem;
    font-weight: 500;
    letter-spacing: 0.01em;
    line-height: 1;
    padding: 0.22rem 0.5rem;
    border-radius: 3px;
    border: 1px solid color-mix(in srgb, var(--tag-accent, #555) 40%, transparent);
    border-left: 3px solid var(--tag-accent, #555);
    background: color-mix(in srgb, var(--tag-accent, #555) 8%, var(--color-surface, #fff));
    color: var(--tag-accent, #555);
    white-space: nowrap;
    user-select: none;
}

/* Welcome "Drawing on:" pills — neutral grey oval by default.
 * When the wrapper carries the --peer-reviewed state class (i.e. toggle is
 * on), the chips flip to green to signal that the corpus is restricted to
 * peer-reviewed sources. Colours are driven purely by CSS; the renderer
 * only toggles the wrapper class, so there are no inline styles to fight. */
.tag-chip.chat__welcome-drawing-chip {
    font-size: 0.72rem;
    font-weight: 400;
    line-height: 1.2;
    padding: 0.18rem 0.6rem;
    gap: 0.3rem;
    border-radius: 999px;
    border: 1px solid var(--color-border, #d1d5db);
    border-left: 1px solid var(--color-border, #d1d5db);
    background: transparent;
    color: var(--color-text-secondary, #6b7280);
    letter-spacing: 0;
    transition: color 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
}

.chat__welcome-drawing--peer-reviewed .tag-chip.chat__welcome-drawing-chip {
    border-color: color-mix(in srgb, #16a34a 45%, transparent);
    background: color-mix(in srgb, #16a34a 10%, transparent);
    color: #15803d;
}

.chat__welcome-drawing--peer-reviewed .tag-chip.chat__welcome-drawing-chip .chat__welcome-drawing-count {
    color: #166534;
}

/* Chips with zero peer-reviewed documents dim out when toggle is on so the
 * user can still see the tag exists but knows it contributes nothing to a
 * peer-reviewed-only query. */
.tag-chip.chat__welcome-drawing-chip--dim,
.chat__welcome-drawing--peer-reviewed .tag-chip.chat__welcome-drawing-chip--dim {
    opacity: 0.45;
    border-color: var(--color-border, #d1d5db);
    background: transparent;
    color: var(--color-text-secondary, #6b7280);
}

.chat__welcome-drawing--peer-reviewed .tag-chip.chat__welcome-drawing-chip--dim .chat__welcome-drawing-count {
    color: var(--color-text-secondary, #6b7280);
}

.tag-chip--add {
    cursor: pointer;
    background: transparent;
    border: 1px dashed var(--color-border, #ddd);
    border-left: 1px dashed var(--color-border, #ddd);
    color: var(--color-text-secondary, #888);
    font-size: 0.85rem;
    padding: 0.18rem 0.45rem;
    transition: border-color 0.15s, color 0.15s;
}

.tag-chip--add:hover {
    border-color: var(--color-primary, #3b82f6);
    color: var(--color-primary, #3b82f6);
}

/* Tag column in library table */
.library__th--tags {
    min-width: 140px;
}

.library__td--tags {
    vertical-align: middle;
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
}

/* ===== Tag Picker Popover ===== */

.tag-picker-backdrop {
    position: fixed;
    inset: 0;
    z-index: 300;
    background: transparent;
}

.tag-picker-popover {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 301;
    background: var(--color-surface, #fff);
    border: 1px solid var(--color-border, #e5e7eb);
    border-radius: 8px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.14);
    min-width: 280px;
    max-width: 380px;
    width: 90vw;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.tag-picker__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--color-border, #e5e7eb);
    background: var(--color-surface-2, #f9fafb);
    flex-shrink: 0;
}

.tag-picker__title {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--color-text, #111);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 240px;
}

.tag-picker__close {
    background: none;
    border: none;
    font-size: 1.2rem;
    line-height: 1;
    cursor: pointer;
    color: var(--color-text-secondary, #6b7280);
    padding: 0 0.2rem;
    flex-shrink: 0;
}

.tag-picker__close:hover {
    color: var(--color-text, #111);
}

.tag-picker__list {
    padding: 0.6rem 0.75rem;
    overflow-y: auto;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.tag-picker__item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    padding: 0.25rem 0.3rem;
    border-radius: 4px;
    transition: background 0.1s;
}

.tag-picker__item:hover {
    background: var(--color-surface-2, #f3f4f6);
}

.tag-picker__checkbox {
    flex-shrink: 0;
    accent-color: var(--color-primary, #3b82f6);
    width: 15px;
    height: 15px;
    cursor: pointer;
}

.tag-picker__empty {
    font-size: 0.8rem;
    color: var(--color-text-secondary, #6b7280);
    text-align: center;
    padding: 0.75rem 0;
    margin: 0;
}

.tag-picker__actions {
    display: flex;
    gap: 0.5rem;
    padding: 0.6rem 0.75rem;
    border-top: 1px solid var(--color-border, #e5e7eb);
    background: var(--color-surface-2, #f9fafb);
    flex-shrink: 0;
    justify-content: flex-end;
}

/* ===== Admin — Ontology Tagging Section ===== */

.ontology__add-row {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.ontology__add-input {
    flex: 1;
    min-width: 0;
}

.ontology__add-btn {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.ontology__tag-list {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    margin-top: 1rem;
}

.ontology__empty {
    font-size: 0.85rem;
    color: var(--color-text-secondary, #6b7280);
    padding: 0.5rem 0;
}

.ontology__tag-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.45rem 0.6rem;
    border: 1px solid var(--color-border, #e5e7eb);
    border-radius: 6px;
    background: var(--color-surface, #fff);
    transition: border-color 0.15s;
}

.ontology__tag-item:hover {
    border-color: var(--color-primary, #3b82f6);
}

.ontology__tag-name {
    flex: 1;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text, #111);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.ontology__tag-rename-input {
    flex: 1;
    font-size: 0.875rem;
    padding: 0.2rem 0.4rem;
    border: 1px solid var(--color-primary, #3b82f6);
    border-radius: 4px;
    background: var(--color-surface, #fff);
    color: var(--color-text, #111);
    min-width: 0;
}

.ontology__tag-actions {
    display: flex;
    gap: 0.25rem;
    flex-shrink: 0;
}

.ontology__tag-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 4px;
    border: 1px solid var(--color-border, #e5e7eb);
    background: transparent;
    cursor: pointer;
    color: var(--color-text-secondary, #6b7280);
    transition: background 0.12s, color 0.12s, border-color 0.12s;
}

.ontology__tag-btn--rename:hover {
    background: var(--color-primary, #3b82f6);
    border-color: var(--color-primary, #3b82f6);
    color: #fff;
}

.ontology__tag-btn--delete:hover {
    background: var(--color-error, #ef4444);
    border-color: var(--color-error, #ef4444);
    color: #fff;
}

.ontology__tag-btn--save:hover {
    background: var(--color-success, #22c55e);
    border-color: var(--color-success, #22c55e);
    color: #fff;
}

.ontology__tag-btn--cancel:hover {
    background: var(--color-surface-2, #f3f4f6);
    border-color: var(--color-border, #e5e7eb);
    color: var(--color-text, #111);
}

/* ===== Tag chip — inline remove button ===== */

.tag-chip--removable {
    padding-right: 0.25rem;
    gap: 0.2rem;
    display: inline-flex;
    align-items: center;
}

.tag-chip__remove {
    background: none;
    border: none;
    padding: 0 0.1rem;
    margin-left: 0.15rem;
    font-size: 0.78rem;
    line-height: 1;
    cursor: pointer;
    color: inherit;
    opacity: 0.55;
    border-radius: 2px;
    transition: opacity 0.12s;
    flex-shrink: 0;
}

.tag-chip__remove:hover {
    opacity: 1;
}

/* ===== Tag filter bar ===== */

.library__filter-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.4rem;
    padding: 0.6rem 0.75rem;
    border-bottom: 1px solid var(--color-border, #e5e7eb);
    background: var(--color-surface-2, #f9fafb);
}

.library__filter-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-secondary, #6b7280);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    flex-shrink: 0;
}

.tag-chip--filter {
    cursor: pointer;
    opacity: 0.6;
    transition: opacity 0.15s, box-shadow 0.15s;
}

.tag-chip--filter:hover {
    opacity: 0.85;
}

.tag-chip--filter-active {
    opacity: 1;
    box-shadow: 0 0 0 2px var(--tag-accent, #555);
}

.library__filter-clear {
    font-size: 0.72rem;
    padding: 0.2rem 0.55rem;
    border: 1px solid var(--color-border, #ddd);
    border-radius: 4px;
    background: transparent;
    cursor: pointer;
    color: var(--color-text-secondary, #6b7280);
    transition: background 0.12s, color 0.12s;
    margin-left: 0.25rem;
}

.library__filter-clear:hover {
    background: var(--color-error, #ef4444);
    border-color: var(--color-error, #ef4444);
    color: #fff;
}

/* ===== Guiding Principle — tag slash menu ===== */

.gp-editor-wrap {
    position: relative;
}

.tag-slash-menu {
    position: absolute;
    left: 0;
    top: calc(100% + 4px);
    z-index: 400;
    background: var(--color-surface, #fff);
    border: 1px solid var(--color-border, #e5e7eb);
    border-radius: 8px;
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.12);
    min-width: 220px;
    max-width: 340px;
    max-height: 260px;
    overflow-y: auto;
    padding: 0.3rem;
}

.tag-slash-menu__item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.5rem;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--color-text, #111);
    transition: background 0.1s;
}

.tag-slash-menu__item:hover,
.tag-slash-menu__item--active {
    background: var(--color-surface-2, #f3f4f6);
}

.tag-slash-menu__chip {
    pointer-events: none;
    flex-shrink: 0;
}

/* ===== Guiding Principle — preview strip ===== */

.gp-preview {
    margin-top: 0.5rem;
    padding: 0.65rem 0.85rem;
    border: 1px solid var(--color-border, #e5e7eb);
    border-left: 3px solid var(--color-primary, #3b82f6);
    border-radius: 6px;
    background: var(--color-surface-2, #f9fafb);
    font-size: 0.85rem;
    line-height: 1.7;
    color: var(--color-text, #111);
    white-space: pre-wrap;
    word-break: break-word;
}

.gp-preview::before {
    content: 'Rendered Preview';
    display: block;
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-primary, #3b82f6);
    margin-bottom: 0.5rem;
}

.gp-tag-token {
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    vertical-align: middle;
    margin: 0 0.2rem;
    padding: 0.22rem 0.6rem;
    /* Force opaque white base so color-mix tint is always visible */
    background: color-mix(in srgb, var(--tag-accent, #555) 12%, #ffffff);
    border: 1px solid color-mix(in srgb, var(--tag-accent, #555) 40%, transparent);
    border-left: 3px solid var(--tag-accent, #555);
    color: var(--tag-accent, #555);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
    cursor: default;
    user-select: none;
}

/* ─── Onboarding page ─────────────────────────────────────────────── */

.onboarding {
    max-width: 680px;
    margin: 2rem auto;
    padding: 0 1rem 3rem;
}

.onboarding__header {
    text-align: center;
    margin-bottom: 2.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.onboarding__icon {
    width: 4rem;
    height: 4rem;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent, #6b4c8a));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    box-shadow: 0 4px 16px rgba(44, 74, 110, 0.2);
}

.onboarding__title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-text);
    margin: 0;
}

.onboarding__subtitle {
    font-size: 1rem;
    color: var(--color-text-secondary);
    margin: 0;
    max-width: 480px;
}

.onboarding__steps {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.onboarding__step {
    display: flex;
    gap: 1.25rem;
    align-items: flex-start;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 0.75rem;
    padding: 1.5rem;
    transition: box-shadow 0.15s;
}

.onboarding__step:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.onboarding__step-number {
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 50%;
    background: var(--color-primary);
    color: #fff;
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.onboarding__step-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.onboarding__step-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0;
}

.onboarding__step-desc {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0;
}

.onboarding__step-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    margin-top: 0.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.15s;
}

.onboarding__step-cta:hover {
    color: var(--color-primary-hover);
}

.onboarding__footer {
    margin-top: 2.5rem;
    display: flex;
    justify-content: center;
}

.onboarding__start-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 2rem;
    background: var(--color-primary);
    color: #fff;
    text-decoration: none;
    border-radius: 0.5rem;
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 500;
    box-shadow: 0 2px 8px rgba(44, 74, 110, 0.2);
    transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
}

.onboarding__start-btn:hover {
    background: var(--color-primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(44, 74, 110, 0.3);
}

.onboarding__start-btn:active {
    transform: translateY(0);
}

.onboarding__step-title-row,
.onboarding__step-body-row {
    display: flex;
    align-items: flex-start;
    gap: 0.375rem;
}

.onboarding__step-title-row {
    align-items: center;
}

.onboarding__edit-btn {
    flex-shrink: 0;
    background: none;
    border: 1px solid transparent;
    border-radius: 0.25rem;
    padding: 0.2rem;
    cursor: pointer;
    color: var(--color-text-secondary);
    opacity: 0.5;
    transition: opacity 0.15s, color 0.15s, border-color 0.15s;
    line-height: 1;
}

.onboarding__edit-btn:hover {
    opacity: 1;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.onboarding__edit-input {
    width: 100%;
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg);
    border: 1.5px solid var(--color-primary);
    border-radius: 0.375rem;
    padding: 0.25rem 0.5rem;
    outline: none;
    box-shadow: 0 0 0 3px rgba(44, 74, 110, 0.12);
}

.onboarding__edit-textarea {
    width: 100%;
    font-size: 0.9rem;
    font-family: var(--font-sans);
    color: var(--color-text-secondary);
    background: var(--color-bg);
    border: 1.5px solid var(--color-primary);
    border-radius: 0.375rem;
    padding: 0.5rem;
    outline: none;
    resize: vertical;
    line-height: 1.6;
    min-height: 4rem;
    box-shadow: 0 0 0 3px rgba(44, 74, 110, 0.12);
}

.onboarding__edit-input:focus,
.onboarding__edit-textarea:focus {
    border-color: var(--color-primary-hover);
    box-shadow: 0 0 0 3px rgba(44, 74, 110, 0.18);
}

.onboarding__toast {
    position: absolute;
    bottom: 0.5rem;
    left: 50%;
    transform: translateX(-50%);
    background: #dc3545;
    color: #fff;
    padding: 0.375rem 0.75rem;
    border-radius: 0.375rem;
    font-size: 0.8rem;
    white-space: nowrap;
    animation: onboarding-toast-fade 3s ease forwards;
    z-index: 10;
}

@keyframes onboarding-toast-fade {
    0%, 70% { opacity: 1; }
    100% { opacity: 0; }
}

.onboarding__loading {
    text-align: center;
    color: var(--color-text-secondary);
    padding: 2rem;
    font-size: 0.9rem;
}

.onboarding__edit-icon {
    display: block;
}

/* ═══════════════════════════════════════════════════════════════════
   Mobile-responsive overrides (user-facing views)
   ═══════════════════════════════════════════════════════════════════ */

/* ─── Hamburger toggle button (hidden on desktop) ──────────────── */

.nav__mobile-only {
    display: none;
    background: none;
    border: none;
    font-family: var(--font-sans);
    cursor: pointer;
    text-align: left;
    width: 100%;
}

.nav__hamburger {
    display: none;
    align-items: center;
    justify-content: center;
    width: 2.25rem;
    height: 2.25rem;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    cursor: pointer;
    color: var(--color-text);
    flex-shrink: 0;
    margin-left: auto;
    transition: background 0.15s, color 0.15s;
    -webkit-tap-highlight-color: transparent;
}

.nav__hamburger:hover {
    background: var(--color-bg);
}

.nav__hamburger svg {
    pointer-events: none;
}

/* ─── History mobile back button ───────────────────────────────── */

.history__back-btn {
    display: none;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 0.75rem;
    margin-bottom: 0.75rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-family: var(--font-sans);
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-primary);
    cursor: pointer;
    transition: background 0.15s;
}

.history__back-btn:hover {
    background: var(--color-bg);
}

.history__back-btn svg {
    flex-shrink: 0;
}

/* ─── ≤ 48rem — Primary mobile breakpoint ──────────────────────── */

@media (max-width: 48rem) {

    /* --- Navigation --- */

    .nav {
        padding: 0 0.75rem;
        gap: 0.5rem;
    }

    .nav__brand {
        margin-right: auto;
    }

    .nav__brand-subtitle {
        max-width: 14rem;
    }

    .nav__hamburger {
        display: flex;
    }

    .nav__links {
        display: none;
        position: fixed;
        top: var(--nav-h);
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--color-surface);
        flex-direction: column;
        padding: 0.75rem;
        z-index: 150;
        overflow-y: auto;
        border-top: 1px solid var(--color-border);
        animation: navSlideIn 0.2s ease-out;
    }

    .nav__links--open {
        display: flex;
    }

    @keyframes navSlideIn {
        from { opacity: 0; transform: translateY(-8px); }
        to { opacity: 1; transform: translateY(0); }
    }

    .nav__link {
        padding: 0.75rem 1rem;
        font-size: 1rem;
        border-radius: var(--radius);
    }

    .nav__more {
        width: 100%;
    }

    .nav__more-toggle {
        width: 100%;
        padding: 0.75rem 1rem;
        font-size: 1rem;
        justify-content: space-between;
    }

    .nav__more-dropdown {
        position: static;
        box-shadow: none;
        border: none;
        padding: 0 0 0 1rem;
        animation: none;
    }

    .nav__more--open .nav__more-dropdown {
        border-top: none;
    }

    .nav__more-item {
        padding: 0.625rem 1rem;
        font-size: 0.9375rem;
    }

    .nav__feedback {
        display: none;
    }

    .nav__help {
        display: none;
    }

    .nav__mobile-only {
        display: block;
    }

    .nav__mobile-only[hidden] {
        display: none;
    }

    .nav__logout {
        margin-left: 0;
        padding: 0.5rem 0.5rem;
        font-size: 0.8125rem;
    }

    /* --- Main container --- */

    .main {
        padding: 1rem 0.75rem;
    }

    /* --- Chat view --- */

    .chat--welcome-state .chat__main {
        padding-top: 2vh;
    }

    .chat__form {
        padding: 0.5rem 0.75rem 0.625rem;
    }

    .chat__input-wrapper {
        padding: 0.25rem 0.25rem 0.25rem 0.5rem;
        align-items: center;
    }

    .chat__input {
        overflow: auto;
    }

    .chat__model-select {
        display: none;
    }

    .chat__input-divider:not(.chat__input-divider--hints) {
        display: none;
    }

    .chat__hints-btn #hintsToggleLabel {
        display: none;
    }

    .chat__hints-btn {
        padding: 0.25rem 0.375rem;
    }

    .chat__form-footer {
        flex-wrap: wrap;
        gap: 0.25rem;
    }

    .chat__form-hint {
        display: none;
    }

    .chat__disclaimer {
        font-size: 0.6875rem;
        margin-left: 0;
        white-space: normal;
    }

    .chat__suggestion {
        font-size: 0.75rem;
        padding: 0.375rem 0.75rem;
    }

    .chat__suggestions {
        gap: 0.375rem;
    }

    .chat__qbank-header {
        flex-direction: column;
        gap: 0.5rem;
        align-items: flex-start;
    }

    .chat__qbank-tabs {
        flex-wrap: wrap;
    }

    /* --- Tap targets (>= 44px) --- */

    .chat__send-btn {
        min-width: 3.5rem;
        height: 2.75rem;
        padding: 0 1rem;
    }

    .nav__hamburger {
        width: 2.75rem;
        height: 2.75rem;
    }

    .feedback-modal__close {
        width: 2.75rem;
        height: 2.75rem;
    }

    .message__copy-btn-bottom,
    .message__latex-btn,
    .message__share-btn,
    .message__email-btn {
        padding: 0.625rem 0.875rem;
    }

    .history__copy-btn,
    .history__latex-btn,
    .history__continue-btn,
    .history__share-btn,
    .history__email-btn {
        padding: 0.625rem 0.875rem;
    }

    .login__toggle {
        padding: 0.5rem 0.75rem;
    }

    .cookie-banner__policy-link {
        padding: 0.5rem 0;
    }

    .cookie-banner__retry {
        padding: 0.5rem 0;
    }

    .shared__claim-btn,
    .shared__continue-btn,
    .shared__chat-btn {
        padding: 0.75rem 1.25rem;
        width: 100%;
        justify-content: center;
    }

    .shared__actions {
        flex-wrap: wrap;
        gap: 0.5rem;
        padding: 1rem;
    }

    .history__detail-label-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .history__item-delete {
        padding: 0.5rem;
    }

    .history__back-btn {
        padding: 0.75rem 1rem;
        min-height: 2.75rem;
    }

    /* --- History view (additional mobile tweaks) --- */

    .history__detail-meta {
        flex-wrap: wrap;
    }

    .history__detail-actions {
        flex-wrap: wrap;
        gap: 0.375rem;
    }

    /* --- Profile view --- */

    .profile {
        margin: 1.5rem auto;
    }

    .profile__card {
        padding: 1.25rem;
    }

    .profile__header {
        gap: 0.75rem;
    }

    .profile__title {
        font-size: 1.0625rem;
    }

    .profile__danger {
        padding: 1rem;
    }

    /* --- Login view --- */

    .login {
        padding: 1.5rem 0.75rem;
    }

    /* --- Onboarding view --- */

    .onboarding {
        margin: 1rem auto;
        padding: 0 0.75rem 2rem;
    }

    .onboarding__title {
        font-size: 1.375rem;
    }

    .onboarding__step {
        padding: 1.125rem;
        gap: 1rem;
    }

    .onboarding__step-number {
        width: 2rem;
        height: 2rem;
        font-size: 0.8125rem;
    }

    /* --- Feedback modal --- */

    .feedback-modal__content {
        width: 95%;
        max-height: 90vh;
    }

    .feedback-modal__textarea {
        min-height: 6rem;
    }

    /* --- Welcome popup --- */

    .welcome-popup__card {
        max-width: 95%;
    }
}

/* ─── ≤ 32rem — Very small phones ──────────────────────────────── */

@media (max-width: 32rem) {

    .nav__brand-text,
    #nav-brand-text,
    .nav__brand-subtitle,
    #nav-brand-subtitle {
        display: none;
    }

    .chat__welcome-title {
        font-size: 1rem;
    }

    .chat__welcome-subtitle {
        font-size: 0.75rem;
    }

    .chat__suggestion {
        font-size: 0.6875rem;
        padding: 0.3125rem 0.625rem;
        white-space: normal;
    }

    .message__bubble {
        padding: 0.625rem 0.875rem;
        font-size: 0.8125rem;
    }

    .message__copy-btn-bottom,
    .message__latex-btn {
        font-size: 0.6875rem;
        padding: 0.5rem 0.75rem;
    }

    .profile {
        padding: 0 0.5rem;
    }

    .history__item {
        padding: 0.625rem;
    }

    .history__item-question {
        font-size: 0.75rem;
    }

    .onboarding__step {
        flex-direction: column;
        gap: 0.75rem;
    }
}

/* ─── User Persona Modal ─────────────────────────────────────── */

.persona-modal {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.persona-modal--open {
    opacity: 1;
}

.persona-modal--closing {
    opacity: 0;
}

.persona-modal__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
}

.persona-modal__card {
    position: relative;
    background: var(--surface, #fff);
    border-radius: 1rem;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    padding: 2.5rem;
    max-width: 480px;
    width: 90%;
    text-align: center;
    animation: personaSlideUp 0.4s ease;
}

@keyframes personaSlideUp {
    from {
        opacity: 0;
        transform: translateY(24px) scale(0.96);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.persona-modal__header {
    margin-bottom: 1.5rem;
}

.persona-modal__icon {
    color: var(--primary, #6366f1);
    margin-bottom: 0.75rem;
}

.persona-modal__title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary, #1a1a2e);
    margin: 0;
    line-height: 1.4;
}

.persona-modal__options {
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
    margin-bottom: 1.5rem;
}

.persona-modal__option {
    display: block;
    width: 100%;
    padding: 0.875rem 1.25rem;
    border: 2px solid var(--border, #e2e8f0);
    border-radius: 0.625rem;
    background: var(--surface, #fff);
    color: var(--text-primary, #1a1a2e);
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
}

.persona-modal__option:hover {
    border-color: var(--primary, #6366f1);
    background: var(--primary-light, #eef2ff);
    color: var(--primary, #6366f1);
    transform: translateY(-1px);
}

.persona-modal__option:active {
    transform: translateY(0);
}

.persona-modal__option--selected {
    border-color: var(--primary, #6366f1);
    background: var(--primary, #6366f1);
    color: #fff;
}

.persona-modal__option:disabled {
    opacity: 0.6;
    cursor: default;
    transform: none;
}

.persona-modal__footer {
    border-top: 1px solid var(--border, #e2e8f0);
    padding-top: 1rem;
}

.persona-modal__skip {
    background: none;
    border: none;
    color: var(--text-secondary, #64748b);
    font-size: 0.875rem;
    cursor: pointer;
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    transition: color 0.2s, background 0.2s;
}

.persona-modal__skip:hover {
    color: var(--text-primary, #1a1a2e);
    background: var(--hover-bg, #f1f5f9);
}

.persona-modal__skip:disabled {
    opacity: 0.5;
    cursor: default;
}

/* ─── Persona Admin Section ──────────────────────────────────── */

.persona-admin__list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.persona-admin__item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.25rem 0;
}

.persona-admin__drag-handle {
    color: var(--text-secondary, #94a3b8);
    cursor: grab;
    flex-shrink: 0;
    display: flex;
    align-items: center;
}

.persona-admin__label-input {
    flex: 1;
    min-width: 0;
}

.persona-admin__remove-btn {
    flex-shrink: 0;
    padding: 0.375rem;
}

.persona-admin__add-row {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.persona-admin__add-input {
    flex: 1;
    min-width: 0;
}

.persona-admin__add-btn {
    flex-shrink: 0;
    white-space: nowrap;
}

.persona-admin__empty {
    color: var(--text-secondary, #94a3b8);
    font-size: 0.875rem;
    font-style: italic;
    padding: 0.5rem 0;
    margin: 0;
}

/* ─── Users view persona column ──────────────────────────────── */

.users-view__persona {
    font-size: 0.8125rem;
    color: var(--text-primary, #1a1a2e);
    background: var(--primary-light, #eef2ff);
    padding: 0.125rem 0.5rem;
    border-radius: 0.25rem;
    white-space: nowrap;
}

.users-view__persona--none {
    background: none;
    color: var(--text-secondary, #94a3b8);
}

/* ─── Persona modal responsive ───────────────────────────────── */

@media (max-width: 480px) {
    .persona-modal__card {
        padding: 1.5rem;
        border-radius: 0.75rem;
    }

    .persona-modal__title {
        font-size: 1.125rem;
    }

    .persona-modal__option {
        padding: 0.75rem 1rem;
        font-size: 0.875rem;
    }
}

/* ─── Touch devices — reveal hover-only controls ───────────────── */

@media (hover: none) {
    .history__item-delete {
        opacity: 0.6;
    }

    .chat__doc-card .chat__doc-view-btn,
    .chat__doc-card .chat__doc-download-btn {
        opacity: 1;
    }

    .chat__doc-item .chat__doc-view-btn {
        opacity: 1;
    }

    .library__edit-btn {
        opacity: 0.6;
    }
}

/* ─── Guiding Principles Router ─────────────────────────────────────────────── */

.gp-router {
    max-width: 960px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.gp-router__header {
    margin-bottom: 2rem;
}

.gp-router__title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.gp-router__subtitle {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

.gp-router__section-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.25rem;
}

.gp-router__section-desc {
    color: var(--color-text-secondary);
    font-size: 0.85rem;
    margin-bottom: 1rem;
    line-height: 1.4;
}

.gp-router__settings,
.gp-router__default-section,
.gp-router__routes-section,
.gp-router__test-section {
    background: var(--color-card-bg, #fff);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 1.25rem 1.5rem;
    margin-bottom: 1.5rem;
}

.gp-router__settings-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 1.25rem;
    margin-top: 1rem;
}

@media (max-width: 768px) {
    .gp-router__settings-grid {
        grid-template-columns: 1fr;
    }
}

.gp-router__setting {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.gp-router__slider {
    width: 100%;
    accent-color: var(--color-primary);
}

.gp-router__settings-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
}

.gp-router__inline-status {
    font-size: 0.85rem;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    transition: opacity 0.3s;
}

.gp-router__inline-status--success {
    color: var(--color-success, #2d8659);
}

.gp-router__inline-status--error {
    color: var(--color-danger, #dc3545);
}

.gp-router__card {
    margin-top: 1rem;
}

.gp-router__always-include {
    margin-top: 0.75rem;
    padding: 0.75rem 1rem;
    background: rgba(44, 74, 110, 0.04);
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
}

.gp-router__always-include .admin__hint {
    margin-top: 0.25rem;
}

.gp-router__card--default {
    border-left: 3px solid var(--color-primary);
    padding-left: 1rem;
}

.gp-router__card-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 0.75rem;
}

.gp-router__routes-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.25rem;
}

.gp-router__routes-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.gp-router__empty {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    font-style: italic;
    padding: 1rem 0;
}

.gp-router__route-card {
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: 1rem;
    transition: box-shadow 0.15s;
}

.gp-router__route-card:hover {
    box-shadow: 0 1px 4px rgba(0,0,0,0.08);
}

.gp-router__route-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.gp-router__route-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.gp-router__route-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0;
}

.gp-router__route-priority {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    background: var(--color-bg);
    padding: 0.1rem 0.5rem;
    border-radius: 10px;
}

.gp-router__route-actions {
    display: flex;
    gap: 0.25rem;
}

.gp-router__route-hypothesis,
.gp-router__route-prefix {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    margin-bottom: 0.25rem;
    line-height: 1.4;
}

.gp-router__route-label {
    font-weight: 600;
    color: var(--color-text);
    margin-right: 0.35rem;
}

/* Test panel */

.gp-router__test-input-row {
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.gp-router__test-input-row .admin__textarea {
    flex: 1;
}

.gp-router__test-results {
    border-top: 1px solid var(--color-border);
    padding-top: 1rem;
}

.gp-router__scores-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
}

.gp-router__scores-table th {
    text-align: left;
    padding: 0.5rem;
    border-bottom: 2px solid var(--color-border);
    font-weight: 600;
    color: var(--color-text);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.gp-router__scores-table td {
    padding: 0.5rem;
    border-bottom: 1px solid var(--color-border);
    vertical-align: middle;
}

.gp-router__score-row--selected {
    background: rgba(44, 74, 110, 0.06);
}

.gp-router__score-bar {
    position: relative;
    width: 100%;
    height: 8px;
    background: var(--color-bg);
    border-radius: 4px;
    overflow: visible;
}

.gp-router__score-bar-fill {
    height: 100%;
    border-radius: 4px;
    background: var(--color-text-secondary);
    transition: width 0.3s ease;
}

.gp-router__score-bar-fill--above {
    background: var(--color-success, #2d8659);
}

.gp-router__score-bar-threshold {
    position: absolute;
    top: -2px;
    width: 2px;
    height: 12px;
    background: var(--color-danger, #dc3545);
    border-radius: 1px;
}

.gp-router__check {
    color: var(--color-success, #2d8659);
    font-weight: 700;
    font-size: 1.1rem;
}

.gp-router__test-note {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    margin-top: 0.5rem;
}

.gp-router__test-error {
    color: var(--color-danger, #dc3545);
    font-size: 0.9rem;
}

.gp-router__test-resolved {
    margin-top: 1rem;
}

.gp-router__test-resolved-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.gp-router__test-prefix-pre {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: 0.75rem 1rem;
    font-size: 0.85rem;
    white-space: pre-wrap;
    word-break: break-word;
    max-height: 200px;
    overflow-y: auto;
    color: var(--color-text);
    font-family: inherit;
    line-height: 1.5;
}

/* Modal */

.gp-router__modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.gp-router__modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
}

.gp-router__modal-content {
    position: relative;
    background: var(--color-card-bg, #fff);
    border-radius: 10px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 8px 32px rgba(0,0,0,0.18);
}

.gp-router__modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.gp-router__modal-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0;
}

.gp-router__modal-close {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.25rem;
    color: var(--color-text-secondary);
    border-radius: 4px;
    transition: background 0.15s;
}

.gp-router__modal-close:hover {
    background: var(--color-bg);
}

.gp-router__modal-body {
    padding: 1.25rem 1.5rem;
}

.gp-router__modal-body .admin__field {
    margin-bottom: 1rem;
}

.gp-router__modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--color-border);
}

.btn--sm {
    padding: 0.4rem 0.85rem;
    font-size: 0.85rem;
}

.admin__select {
    width: 100%;
    padding: 0.6rem 0.75rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius, 6px);
    font-family: var(--font-sans, inherit);
    font-size: 0.9rem;
    color: var(--color-text);
    background: var(--color-surface, #fff);
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
    cursor: pointer;
}

.admin__select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(44, 74, 110, 0.1);
}