/* Глобальный сброс и шрифты */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* Заголовки */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.25;
}

h1 {
    font-size: var(--text-4xl);
}

h2 {
    font-size: var(--text-3xl);
}

h3 {
    font-size: var(--text-2xl);
}

h4 {
    font-size: var(--text-xl);
}

/* Контейнеры */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-4);
    width: 100%;
}

.content-width {
    max-width: 1100px;
    margin: 0 auto;
}

.form-container {
    max-width: 480px;
    margin: var(--space-12) auto;
    background: var(--color-surface);
    padding: var(--space-8);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
}

/* Сетка и разметка */
.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.align-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.justify-center {
    justify-content: center;
}

.gap-2 {
    gap: var(--space-2);
}

.gap-4 {
    gap: var(--space-4);
}

.gap-6 {
    gap: var(--space-6);
}

.grid {
    display: grid;
    gap: var(--space-6);
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 768px) {

    .grid-2,
    .grid-3 {
        grid-template-columns: 1fr;
    }
}

/* Кнопки */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 40px;
    padding: 0 var(--space-4);
    font-size: var(--text-sm);
    font-weight: 700;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
    border: 1px solid transparent;
    text-decoration: none;
    gap: var(--space-2);
}

.btn-primary {
    background-color: var(--color-primary-600);
    color: var(--color-on-primary);
}

.btn-primary:hover {
    background-color: var(--color-primary-700);
    box-shadow: var(--shadow-sm);
}

.btn-primary:active { box-shadow: none; }

.btn-secondary {
    background-color: var(--color-surface);
    border-color: var(--color-border);
    color: var(--color-text-soft);
}

.btn-secondary:hover {
    background-color: var(--color-surface-soft);
    border-color: var(--color-border-strong);
}

.btn-student {
    background-color: var(--color-secondary-600);
    color: var(--color-on-primary);
    font-family: 'Outfit', sans-serif;
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 6px rgb(var(--vibe-shadow-rgb) / 0.1);
}

.btn-student:hover {
    background-color: var(--color-secondary-500);
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 8px 20px rgb(var(--vibe-shadow-rgb) / 0.3);
}

.btn-danger {
    background-color: var(--color-danger-500);
    color: var(--color-on-primary);
}

.btn-danger:hover {
    background-color: var(--color-danger-500);
    opacity: 0.9;
}

/* Shared accessible states. Pages compose these primitives; they do not copy a shell. */
.ui-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); }
.ui-empty, .ui-error { padding: var(--space-8); text-align: center; color: var(--color-text-muted); }
.ui-error { color: var(--color-danger-500); border: 1px solid var(--color-danger-400); background: var(--color-danger-50); }
.ui-sr-only { position: absolute; left: 0; top: 0; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); clip-path: inset(50%); white-space: nowrap; border: 0; }
.btn:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible { outline: 2px solid var(--ui-focus-ring); outline-offset: 2px; box-shadow: var(--shadow-focus); }
.btn[aria-disabled="true"], .btn:disabled { cursor: not-allowed; opacity: .55; transform: none; box-shadow: none; }

/* Forms and data-display primitives.  Behaviour is native HTML/HTMX; no onclick API. */
.ui-input,
.ui-select,
.ui-textarea {
    width: 100%;
    min-height: 40px;
    padding: 0 var(--space-3);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface);
    color: var(--color-text);
    font: inherit;
    font-size: var(--text-sm);
    transition: border-color 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}
.ui-select { appearance: auto; }
.ui-textarea { min-height: 96px; padding-block: var(--space-3); resize: vertical; }
.ui-input::placeholder,
.ui-textarea::placeholder { color: var(--color-text-muted); opacity: .75; }
.ui-input:hover,
.ui-select:hover,
.ui-textarea:hover { border-color: var(--color-border-strong); }
.ui-input:focus,
.ui-select:focus,
.ui-textarea:focus { border-color: var(--color-primary-600); outline: 0; box-shadow: 0 0 0 3px rgb(var(--vibe-palm-rgb) / 0.15); }
.ui-input:disabled,
.ui-select:disabled,
.ui-textarea:disabled { cursor: not-allowed; background: var(--color-surface-soft); color: var(--color-disabled); }
.ui-input-error { border-color: var(--color-danger-500); }
.ui-input-error:focus { border-color: var(--color-danger-500); box-shadow: var(--shadow-danger-focus); }
.ui-help { display: block; margin-top: var(--space-1); color: var(--color-text-muted); font-size: var(--text-sm); }
.ui-help-error { color: var(--color-danger-500); }
.ui-table-wrap { overflow-x: auto; border: 1px solid var(--color-border); border-radius: var(--radius-lg); background: var(--color-surface); }
.ui-table { width: 100%; border-collapse: collapse; font-size: var(--text-sm); }
.ui-table th, .ui-table td { height: 60px; padding: var(--space-3) var(--space-4); text-align: left; border-bottom: 1px solid var(--color-border); vertical-align: middle; }
.ui-table th { height: 44px; color: var(--color-text-soft); background: var(--color-surface-soft); font-size: var(--text-xs); font-weight: 750; }
.ui-table tbody tr { transition: background-color 0.12s ease; }
.ui-table tbody tr:hover { background: color-mix(in srgb, var(--backoffice-primary-soft, var(--color-primary-50)) 45%, var(--color-surface)); }
.ui-table tbody tr[aria-selected="true"], .ui-table tbody tr.is-selected { background: var(--backoffice-primary-soft, var(--color-primary-50)); }
.ui-table tr:last-child td { border-bottom: 0; }
.ui-table__primary-link { color: var(--color-primary-600); font-weight: 700; text-decoration: none; }
.ui-table__primary-link:hover { text-decoration: underline; }
.ui-table__meta { margin-top: var(--space-1); color: var(--color-text-muted); font-size: var(--text-xs); }
.ui-filter-bar { display: flex; align-items: end; gap: var(--space-3); padding: var(--space-4); flex-wrap: wrap; }
.ui-filter-bar > div { display: grid; gap: var(--space-1); }
.ui-filter-bar label { font-size: var(--text-sm); font-weight: 700; }
.ui-filter-bar__actions { display: flex !important; gap: var(--space-2); }

/* User notification center shared by parent, child and backoffice shells. */
.portal-notification-center { display: grid; gap: var(--space-5); width: min(100%, 920px); margin: 0 auto; }
.portal-notification-center__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-5);
    padding: var(--space-6);
    border: 1px solid var(--learner-border, var(--color-border));
    border-radius: var(--radius-xl);
    background: linear-gradient(135deg, var(--learner-surface, var(--color-surface)) 0%, var(--learner-paper, var(--color-surface-soft)) 100%);
    box-shadow: var(--shadow-sm);
}
.portal-notification-center__heading { display: flex; align-items: center; gap: var(--space-4); min-width: 0; }
.portal-notification-center__heading-icon,
.portal-notification-item__icon,
.portal-notification-empty__icon { display: inline-flex; flex: 0 0 auto; align-items: center; justify-content: center; color: var(--learner-palm, var(--color-primary-600)); }
.portal-notification-center__heading-icon { width: 48px; height: 48px; border-radius: 16px; background: var(--learner-palm-lite, var(--color-primary-50)); }
.portal-notification-center__heading-icon i { width: 24px; height: 24px; }
.portal-notification-center__header h1 { margin: 0; color: var(--learner-ink, var(--color-text)); font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 900; letter-spacing: -.03em; }
.portal-notification-center__header p { margin: var(--space-1) 0 0; color: var(--learner-muted, var(--color-text-muted)); font-size: var(--text-sm); font-weight: 600; }
.portal-notification-center__mark-all { white-space: nowrap; }
.portal-notification-center__mark-all i { width: 17px; height: 17px; }
.portal-notification-center__backoffice-action { display: flex; justify-content: flex-end; }
.portal-notification-list { display: grid; gap: var(--space-3); }
.portal-notification-item {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: var(--space-4);
    padding: var(--space-5);
    border: 1px solid var(--learner-border, var(--color-border));
    border-radius: var(--radius-lg);
    background: var(--learner-surface, var(--color-surface));
    box-shadow: var(--shadow-sm);
}
.portal-notification-item.is-unread { border-color: var(--learner-palm, var(--color-primary-500)); background: color-mix(in srgb, var(--learner-palm-lite, var(--color-primary-50)) 42%, var(--learner-surface, var(--color-surface))); box-shadow: 0 6px 18px rgb(var(--vibe-palm-rgb) / .08); }
.portal-notification-item__icon { width: 40px; height: 40px; border-radius: 13px; background: var(--learner-sand, var(--color-surface-soft)); }
.portal-notification-item.is-unread .portal-notification-item__icon { background: var(--learner-palm, var(--color-primary-600)); color: var(--color-on-primary); }
.portal-notification-item__icon i { width: 19px; height: 19px; }
.portal-notification-item__content { min-width: 0; }
.portal-notification-item__header { display: flex; align-items: baseline; justify-content: space-between; gap: var(--space-4); }
.portal-notification-item__header h2 { margin: 0; color: var(--learner-ink, var(--color-text)); font-size: var(--text-base); font-weight: 850; overflow-wrap: anywhere; }
.portal-notification-item__header time { flex: 0 0 auto; color: var(--learner-muted, var(--color-text-muted)); font-size: var(--text-xs); font-weight: 650; }
.portal-notification-item__content > p { margin: var(--space-2) 0 0; color: var(--learner-muted, var(--color-text-soft)); font-size: var(--text-sm); line-height: 1.55; overflow-wrap: anywhere; }
.portal-notification-item__actions { display: flex; align-items: center; flex-wrap: wrap; gap: var(--space-2); margin-top: var(--space-4); }
.portal-notification-item__actions form { margin: 0; }
.portal-notification-item__actions .btn { min-height: 38px; height: auto; }
.portal-notification-empty { padding: clamp(2.5rem, 8vw, 5rem) var(--space-5); border: 1px dashed var(--learner-border-strong, var(--color-border-strong)); border-radius: var(--radius-xl); background: var(--learner-surface, var(--color-surface)); text-align: center; }
.portal-notification-empty__icon { width: 64px; height: 64px; margin-bottom: var(--space-4); border-radius: 22px; background: var(--learner-sand, var(--color-surface-soft)); color: var(--learner-muted, var(--color-text-muted)); }
.portal-notification-empty__icon i { width: 28px; height: 28px; }
.portal-notification-empty h2 { margin: 0; color: var(--learner-ink, var(--color-text)); font-size: var(--text-xl); font-weight: 850; }
.portal-notification-empty p { margin: var(--space-2) 0 0; color: var(--learner-muted, var(--color-text-muted)); font-size: var(--text-sm); font-weight: 600; }
@media (max-width: 640px) {
    .portal-notification-center { gap: var(--space-4); }
    .portal-notification-center__header { align-items: stretch; flex-direction: column; padding: var(--space-5); }
    .portal-notification-center__header form,
    .portal-notification-center__mark-all { width: 100%; }
    .portal-notification-center__mark-all { justify-content: center; }
    .portal-notification-item { gap: var(--space-3); padding: var(--space-4); }
    .portal-notification-item__header { align-items: flex-start; flex-direction: column; gap: var(--space-1); }
    .portal-notification-item__actions { align-items: stretch; flex-direction: column; }
    .portal-notification-item__actions form,
    .portal-notification-item__actions .btn { width: 100%; }
    .portal-notification-item__actions .btn { justify-content: center; }
}

/* Notification center: self-contained backoffice form/layout components. */
.notification-panel { padding: var(--space-6); }
.notification-panel > :first-child { margin-top: 0; }
.notification-panel > :last-child { margin-bottom: 0; }
.notification-panel h2 { margin: 0 0 var(--space-2); color: var(--backoffice-text, var(--color-text)); font-size: var(--text-lg); }
.notification-panel p { margin: 0; color: var(--backoffice-text-muted, var(--color-text-muted)); line-height: 1.6; }
.notification-form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-5); }
.notification-field { display: grid; align-content: start; gap: var(--space-2); min-width: 0; }
.notification-field--wide { grid-column: 1 / -1; }
.notification-field > label,
.notification-field__label { color: var(--backoffice-text, var(--color-text)); font-size: var(--text-sm); font-weight: 700; }
.app-layout .notification-field .ui-textarea {
    width: 100%;
    min-height: 112px;
    padding: var(--space-3) var(--space-4);
    resize: vertical;
    border: 1px solid var(--backoffice-border);
    border-radius: var(--radius-md);
    background: var(--backoffice-surface);
    color: var(--backoffice-text);
    font: inherit;
    font-size: var(--text-sm);
    line-height: 1.55;
}
.app-layout .notification-field .ui-textarea:focus {
    border-color: var(--backoffice-primary);
    outline: 2px solid transparent;
    box-shadow: 0 0 0 3px rgb(var(--vibe-palm-rgb) / 0.15);
}
.notification-check {
    display: inline-flex !important;
    grid-template-columns: none !important;
    align-items: center;
    justify-self: start;
    gap: var(--space-2) !important;
    min-height: 36px;
    cursor: pointer;
    color: var(--backoffice-text, var(--color-text));
    font-size: var(--text-sm);
    font-weight: 700;
}
.notification-check input[type="checkbox"] { width: 18px !important; height: 18px; margin: 0; accent-color: var(--backoffice-primary); }
.notification-channel-card { padding: 0; overflow: hidden; }
.notification-channel-card > summary {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-6);
    cursor: pointer;
    color: var(--backoffice-text, var(--color-text));
    font-weight: 800;
    list-style: none;
}
.notification-channel-card > summary::-webkit-details-marker { display: none; }
.notification-channel-card > summary::before { content: "›"; color: var(--backoffice-primary); font-size: 1.4em; line-height: 1; transform: rotate(0); transition: transform .15s ease; }
.notification-channel-card[open] > summary::before { transform: rotate(90deg); }
.notification-channel-card[open] > summary { border-bottom: 1px solid var(--backoffice-border); background: var(--backoffice-surface-soft); }
.notification-channel-card__body { padding: var(--space-6); }
.notification-channel-code { margin-left: auto; color: var(--backoffice-text-muted, var(--color-text-muted)); font-size: var(--text-xs); font-weight: 600; }
.notification-actions { position: sticky; bottom: var(--space-3); z-index: 5; display: flex; gap: var(--space-3); padding: var(--space-4); border: 1px solid var(--backoffice-border); border-radius: var(--radius-lg); background: color-mix(in srgb, var(--backoffice-surface) 92%, transparent); box-shadow: var(--shadow-md); backdrop-filter: blur(10px); }
.notification-visual-editor { grid-column: 1 / -1; overflow: hidden; border: 1px solid var(--backoffice-border); border-radius: var(--radius-md); background: #0f172a; }
.notification-visual-editor__toolbar { display: flex; align-items: center; gap: var(--space-2); min-height: 52px; padding: var(--space-2) var(--space-3); border-bottom: 1px solid #334155; background: #111827; }
.notification-visual-editor__toolbar strong { margin-right: auto; color: #f8fafc; font-size: var(--text-sm); }
.notification-visual-editor__status { color: #94a3b8; font-size: var(--text-xs); font-variant-numeric: tabular-nums; }
.notification-visual-editor__mode { display: flex; gap: 2px; padding: 2px; border-radius: var(--radius-sm); background: #0f172a; }
.notification-visual-editor__button { min-height: 32px; padding: 0 var(--space-3); border: 1px solid #334155; border-radius: var(--radius-sm); background: #1e293b; color: #cbd5e1; font: inherit; font-size: var(--text-xs); font-weight: 700; cursor: pointer; }
.notification-visual-editor__button:hover { border-color: #64748b; background: #334155; color: #fff; }
.notification-visual-editor__button[aria-pressed="true"] { border-color: var(--backoffice-primary); background: var(--backoffice-primary); color: #fff; }
.notification-visual-editor__canvas { display: none; width: 100%; height: min(68vh, 720px); min-height: 520px; }
.notification-visual-editor__source { min-height: 520px; border: 0; border-radius: 0; background: #fff; font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; font-size: 13px; line-height: 1.55; resize: vertical; }
.notification-visual-editor.is-ready.is-visual .notification-visual-editor__canvas { display: block; }
.notification-visual-editor.is-ready.is-visual .notification-visual-editor__source { display: none; }
.notification-visual-editor.is-source .notification-visual-editor__canvas { display: none; }
.notification-visual-editor.is-source .notification-visual-editor__source { display: block; }
.notification-visual-editor.is-expanded { position: fixed; z-index: 2500; inset: var(--space-4); display: flex; flex-direction: column; border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); }
.notification-visual-editor.is-expanded .notification-visual-editor__canvas,
.notification-visual-editor.is-expanded .notification-visual-editor__source { flex: 1; height: auto; min-height: 0; }
.notification-visual-editor .gjs-editor { height: 100%; }
.notification-visual-editor .gjs-one-bg { background-color: #111827; }
.notification-visual-editor .gjs-two-color { color: #cbd5e1; }
.notification-visual-editor .gjs-three-bg { background-color: var(--backoffice-primary); color: #fff; }
.notification-visual-editor .gjs-four-color,
.notification-visual-editor .gjs-four-color-h:hover { color: #5eead4; }
body.notification-editor-expanded { overflow: hidden; }
@media (max-width: 720px) {
    .notification-panel,
    .notification-channel-card__body { padding: var(--space-4); }
    .notification-form-grid { grid-template-columns: 1fr; }
    .notification-field--wide { grid-column: auto; }
    .notification-channel-card > summary { padding: var(--space-4); }
    .notification-actions > * { flex: 1; justify-content: center; }
    .notification-visual-editor__toolbar { flex-wrap: wrap; }
    .notification-visual-editor__toolbar strong { width: 100%; }
    .notification-visual-editor__status { margin-right: auto; }
    .notification-visual-editor__canvas,
    .notification-visual-editor__source { min-height: 420px; }
}
.backoffice-tabs { display: flex; align-items: center; gap: var(--space-2); margin-bottom: var(--space-6); padding-bottom: var(--space-3); overflow-x: auto; border-bottom: 1px solid var(--backoffice-border); }
.backoffice-tab { display: inline-flex; flex-shrink: 0; align-items: center; gap: 6px; padding: var(--space-2) var(--space-4); border-radius: var(--radius-lg); color: var(--backoffice-text); font-size: var(--text-xs); font-weight: 800; text-decoration: none; transition: background-color .2s ease, color .2s ease, box-shadow .2s ease; }
.backoffice-tab:hover { background: var(--backoffice-surface-soft); }
.backoffice-tab[aria-current="page"] { background: var(--backoffice-primary); color: var(--color-on-primary); box-shadow: 0 6px 16px rgb(var(--vibe-palm-rgb) / .25); }
.backoffice-tab i { width: 14px; height: 14px; }
.backoffice-brand-subtitle { color: var(--backoffice-primary-soft); }
.backoffice-card-accent { border-left: 4px solid var(--backoffice-primary); }
.backoffice-card-success { border-left: 4px solid var(--color-success-500); }
.backoffice-card-secondary { border-left: 4px solid var(--color-secondary-500); }
.backoffice-text { color: var(--color-text); }
.backoffice-text-soft { color: var(--color-text-soft); }
.backoffice-text-muted { color: var(--color-text-muted); }
.backoffice-text-disabled { color: var(--color-disabled); }
.backoffice-chip { background: var(--color-surface-soft); color: var(--color-text-soft); }
.backoffice-chip:hover { background: var(--backoffice-primary-soft); color: var(--backoffice-primary); }
.backoffice-border-top { border-top: 1px solid var(--color-border); }
.backoffice-filter-span-2 { grid-column: auto; }
@media (min-width: 640px) { .backoffice-filter-span-2 { grid-column: span 2; } }
.btn-sm { min-height: 32px; height: 32px; padding: 0 var(--space-3); font-size: var(--text-xs); }
.ui-priority { font-size: var(--text-sm); font-weight: 700; }
.ui-priority--high { color: var(--color-danger-500); }
.ui-priority--medium { color: var(--color-warning-700); }
.ui-priority--low { color: var(--color-text-muted); }
.ui-stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: var(--space-4); }
.ui-stat { display: grid; gap: var(--space-1); padding: var(--space-4); border-left: 4px solid var(--color-primary-500); }
.ui-stat span { color: var(--color-text-muted); font-size: var(--text-sm); font-weight: 700; }
.ui-stat strong { color: var(--color-text); font-size: var(--text-2xl); }
.ui-stat--danger { border-left-color: var(--color-danger-500); }
.ui-tabs a.ui-tab { display: inline-flex; align-items: center; text-decoration: none; }
.ui-tabs a.ui-tab[aria-current="page"] { color: var(--ui-primary); border-bottom-color: var(--ui-primary); }
.ui-inline-form { display: inline-block; margin-left: var(--space-2); }
.ui-code-block { max-width: min(600px, 70vw); max-height: 22rem; overflow: auto; margin: var(--space-2) 0 0; padding: var(--space-3); border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface-soft); font-size: var(--text-xs); white-space: pre-wrap; overflow-wrap: anywhere; }
.ui-grid { display: grid; gap: var(--space-4); }
.ui-grid--two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.ui-stack--compact { gap: var(--space-2); }
.ui-split { display: flex; justify-content: space-between; gap: var(--space-3); align-items: baseline; }
.ui-progress { height: 8px; overflow: hidden; border-radius: var(--radius-pill); background: var(--color-surface-soft); }
.ui-progress > span { display: block; height: 100%; border-radius: inherit; background: var(--color-primary-600); }
.ui-progress-native {
    display: block;
    width: 100%;
    height: 8px;
    overflow: hidden;
    appearance: none;
    border: 0;
    border-radius: var(--radius-pill);
    background: var(--color-surface-soft);
}
.ui-progress-native::-webkit-progress-bar { background: var(--color-surface-soft); }
.ui-progress-native::-webkit-progress-value { border-radius: inherit; background: var(--color-primary-600); }
.ui-progress-native::-moz-progress-bar { border-radius: inherit; background: var(--color-primary-600); }
.ui-definition-list { display: grid; gap: var(--space-2); margin: var(--space-3) 0 0; font-size: var(--text-sm); }
.ui-definition-list div { display: grid; grid-template-columns: minmax(6rem, 0.35fr) 1fr; gap: var(--space-2); }
.ui-definition-list dt { color: var(--color-text-muted); }
.ui-definition-list dd { margin: 0; }
@media (max-width: 768px) { .ui-grid--two { grid-template-columns: 1fr; } .ui-definition-list div { grid-template-columns: 1fr; gap: 0; } }
.ui-badge { display: inline-flex; align-items: center; min-height: 24px; padding: 0 var(--space-2); border-radius: var(--radius-pill); background: var(--color-surface-soft); color: var(--color-text-soft); font-size: var(--text-xs); font-weight: 700; }
.ui-badge-success { background: var(--color-success-100); color: var(--color-success-800); }
.ui-badge-warning { background: var(--color-warning-100); color: var(--color-warning-800); }
.ui-badge-danger { background: var(--color-danger-100); color: var(--color-danger-800); }
.ui-tabs { display: flex; gap: var(--space-1); border-bottom: 1px solid var(--color-border); overflow-x: auto; white-space: nowrap; scrollbar-width: thin; }
.ui-tab { flex-shrink: 0; border: 0; border-bottom: 2px solid transparent; padding: var(--space-3) var(--space-4); background: transparent; color: var(--color-text-muted); font: inherit; font-size: var(--text-sm); font-weight: 700; white-space: nowrap; cursor: pointer; }
.ui-tab:hover { color: var(--color-primary-700); }
.ui-tab[aria-selected="true"] { color: var(--ui-primary); border-bottom-color: var(--ui-primary); }
.ui-pagination { display: flex; align-items: center; gap: var(--space-2); }
.ui-pagination a, .ui-pagination span { min-width: 36px; min-height: 36px; display: inline-grid; place-items: center; border-radius: var(--radius-sm); }
.ui-pagination a { color: var(--color-primary-600); text-decoration: none; }
.ui-pagination [aria-current="page"] { background: var(--color-primary-600); color: var(--color-on-primary); }
.ui-skeleton { border-radius: var(--radius-sm); background: linear-gradient(90deg, var(--color-surface-soft), var(--color-border), var(--color-surface-soft)); background-size: 200% 100%; animation: ui-shimmer 1.4s ease-in-out infinite; }
.shell-messages {
    position: fixed;
    z-index: 2100;
    top: max(var(--space-4), env(safe-area-inset-top));
    right: max(var(--space-4), env(safe-area-inset-right));
    display: grid;
    width: min(400px, calc(100vw - (2 * var(--space-4))));
    gap: var(--space-3);
    pointer-events: none;
}

/* The selector deliberately includes the region. It wins over the legacy
   compiled Tailwind .ui-toast rule while keeping all colours theme-driven. */
.shell-messages .ui-toast {
    position: relative;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: start;
    gap: var(--space-3);
    width: 100%;
    padding: var(--space-4);
    border: 1px solid var(--color-info-300);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    color: var(--color-text);
    box-shadow: var(--shadow-lg);
    font-size: var(--text-sm);
    line-height: 1.45;
    pointer-events: auto;
    animation: ui-toast-enter 180ms ease-out both;
}

.shell-messages .ui-toast--success { border-color: var(--color-success-300); }
.shell-messages .ui-toast--warning { border-color: var(--color-warning-200); }
.shell-messages .ui-toast--error { border-color: var(--color-danger-300); }
.shell-messages .ui-toast.is-leaving {
    animation: ui-toast-leave 180ms ease-in both;
    pointer-events: none;
}
.ui-toast__marker {
    width: 10px;
    height: 10px;
    margin-top: 5px;
    border-radius: var(--radius-pill);
    background: var(--color-info-600);
}
.ui-toast--success .ui-toast__marker { background: var(--color-success-500); }
.ui-toast--warning .ui-toast__marker { background: var(--color-warning-500); }
.ui-toast--error .ui-toast__marker { background: var(--color-danger-500); }
.ui-toast__message { min-width: 0; overflow-wrap: anywhere; }
.ui-toast__close {
    display: inline-grid;
    place-items: center;
    width: 28px;
    height: 28px;
    margin: -5px -5px -5px 0;
    padding: 0;
    border: 0;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--color-text-muted);
    cursor: pointer;
    font: inherit;
    font-size: var(--text-xl);
    line-height: 1;
}
.ui-toast__close:hover { background: var(--color-surface-soft); color: var(--color-text); }
.ui-toast__close:focus-visible { outline: 2px solid var(--ui-focus-ring); outline-offset: 2px; }

@keyframes ui-toast-enter {
    from { opacity: 0; transform: translate3d(16px, -4px, 0); }
    to { opacity: 1; transform: translate3d(0, 0, 0); }
}
@keyframes ui-toast-leave {
    from { opacity: 1; transform: translate3d(0, 0, 0); }
    to { opacity: 0; transform: translate3d(16px, 0, 0); }
}

@media (max-width: 480px) {
    .shell-messages {
        top: max(var(--space-2), env(safe-area-inset-top));
        right: var(--space-2);
        left: var(--space-2);
        width: auto;
    }
}

@media (prefers-reduced-motion: reduce) {
    .shell-messages .ui-toast,
    .shell-messages .ui-toast.is-leaving { animation-duration: 1ms; }
}
.ui-modal[hidden] { display: none; }
.ui-modal { position: fixed; z-index: 1000; inset: 0; display: grid; place-items: center; padding: var(--space-4); background: var(--overlay-medium); }
.ui-modal__dialog { max-width: 560px; width: 100%; padding: var(--space-6); border-radius: var(--radius-lg); background: var(--color-surface); box-shadow: var(--shadow-lg); }
.ui-stack { display: grid; gap: var(--space-5); }

/* Shared backoffice content composition. Keep feature templates focused on
   domain markup while preserving one visual rhythm across operational screens. */
.backoffice-section { padding: var(--space-5); }
.backoffice-section--flush { padding: 0; overflow: hidden; }
.backoffice-section__header { display: flex; align-items: flex-start; justify-content: space-between; gap: var(--space-4); margin-bottom: var(--space-4); }
.backoffice-section__heading { display: grid; gap: var(--space-1); min-width: 0; }
.backoffice-section__heading h2,
.backoffice-section__heading h3 { margin: 0; color: var(--color-text); font-size: var(--text-lg); font-weight: 750; line-height: 1.25; }
.backoffice-section__heading p { margin: 0; color: var(--color-text-muted); font-size: var(--text-sm); }
.backoffice-section__meta { flex: 0 0 auto; color: var(--color-text-muted); font-size: var(--text-sm); }
.backoffice-actions { display: flex; align-items: center; gap: var(--space-2); flex-wrap: wrap; }
.backoffice-form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-4); }
.backoffice-form-grid--three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.backoffice-form-grid > label,
.backoffice-field { display: grid; align-content: start; gap: var(--space-2); min-width: 0; color: var(--color-text); font-size: var(--text-sm); font-weight: 700; }
.backoffice-form-grid__wide { grid-column: 1 / -1; }
.backoffice-form-actions { display: flex; align-items: center; gap: var(--space-2); flex-wrap: wrap; grid-column: 1 / -1; }
.backoffice-details { padding: 0; overflow: hidden; }
.backoffice-details > summary { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); min-height: 58px; padding: 0 var(--space-5); cursor: pointer; color: var(--color-text); font-weight: 750; list-style: none; }
.backoffice-details > summary::-webkit-details-marker { display: none; }
.backoffice-details > summary::after { content: '+'; color: var(--backoffice-primary); font-size: var(--text-xl); line-height: 1; }
.backoffice-details[open] > summary { border-bottom: 1px solid var(--color-border); }
.backoffice-details[open] > summary::after { content: '\2212'; }
.backoffice-details__body { padding: var(--space-5); }
.backoffice-note { padding: var(--space-4); border: 1px solid var(--backoffice-border); border-left: 4px solid var(--backoffice-primary); border-radius: var(--radius-md); background: var(--backoffice-surface-soft); color: var(--color-text-soft); }
.backoffice-note h2,
.backoffice-note h3 { margin: 0 0 var(--space-2); color: var(--color-text); font-size: var(--text-base); font-weight: 750; }
.backoffice-note p { margin: 0; }
.backoffice-note p + p { margin-top: var(--space-2); }
.backoffice-divider { height: 1px; margin: var(--space-5) 0; border: 0; background: var(--color-border); }

@media (max-width: 850px) {
    .backoffice-section { padding: var(--space-4); }
    .backoffice-section__header { align-items: stretch; flex-direction: column; }
    .backoffice-section__header .btn { width: 100%; }
    .backoffice-form-grid,
    .backoffice-form-grid--three { grid-template-columns: 1fr; }
    .backoffice-form-grid__wide,
    .backoffice-form-actions { grid-column: auto; }
    .backoffice-form-actions { align-items: stretch; flex-direction: column; }
    .backoffice-form-actions .btn { width: 100%; }
}
.ui-page-heading { margin-bottom: var(--space-6); }
.ui-page-heading h1, .ui-course-card h2, .ui-curriculum-section h3, .ui-curriculum-section h4 { margin: 0; color: var(--color-text); }
.ui-page-heading p, .ui-course-card__header p { color: var(--color-text-muted); }
.ui-course-card { padding: var(--space-6); }
.ui-course-card__header, .ui-lesson-row { display: flex; gap: var(--space-4); justify-content: space-between; align-items: center; }
.ui-course-card .ui-progress { margin: var(--space-4) 0 var(--space-2); }
.ui-course-card .ui-progress > span { background: var(--color-success-500); }
.ui-curriculum-section { padding-top: var(--space-5); }
.ui-curriculum-section h4 { margin: var(--space-4) 0 var(--space-2); font-size: var(--text-base); }
.ui-lesson-list { display: grid; gap: var(--space-2); margin: 0; padding: 0; list-style: none; }
.ui-lesson-row { padding: var(--space-3); border: 1px solid var(--color-border); border-radius: var(--radius-md); }
.ui-lesson-row strong { display: block; }
.ui-lesson-element { padding: var(--space-6); overflow: hidden; }
.ui-lesson-element h2 { margin-top: 0; }
.ui-lesson-element video, .ui-lesson-element audio { width: 100%; }
.ui-embed { width: 100%; min-height: min(60vw, 540px); border: 0; border-radius: var(--radius-md); }
.ui-gallery { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: var(--space-3); }
.ui-gallery img { width: 100%; height: auto; border-radius: var(--radius-md); }
.ui-lesson-runtime textarea, .ui-lesson-runtime input, .ui-card textarea, .ui-card input { width: 100%; }
.ui-card label { display: grid; gap: var(--space-2); font-weight: 600; }
.ui-choice { grid-template-columns: auto 1fr !important; align-items: center; padding: var(--space-2) 0; }
.ui-choice input { width: auto; }
@media (max-width: 575px) { .ui-course-card { padding: var(--space-4); } .ui-course-card__header, .ui-lesson-row { align-items: flex-start; flex-direction: column; } .ui-lesson-row .btn { width: 100%; } }
@keyframes ui-shimmer { to { background-position: -200% 0; } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; } }

.ui-skip-link { position: absolute; left: var(--space-4); top: -64px; z-index: 2000; padding: var(--space-3); background: var(--color-surface); color: var(--color-primary-700); border-radius: var(--radius-sm); box-shadow: var(--shadow-md); }
.ui-skip-link:focus { top: var(--space-4); }
.ui-drawer-toggle, .ui-drawer-close { border: 0; background: transparent; color: inherit; padding: var(--space-2); cursor: pointer; }
.ui-drawer-overlay { display: none; }
.legacy-confirm { position: fixed; z-index: 2000; inset: 0; display: grid; place-items: center; padding: var(--space-4); background: var(--overlay-strong); }
.legacy-confirm[hidden] { display: none; }
.legacy-confirm__dialog { width: min(420px, 100%); padding: var(--space-8); text-align: center; border: 3px solid var(--color-border); border-radius: var(--radius-xl); background: var(--color-surface); box-shadow: var(--shadow-lg); }
.legacy-confirm__actions { display: flex; gap: var(--space-3); }
.legacy-confirm__actions > * { flex: 1; }
@media (max-width: 768px) {
  .ui-drawer { position: fixed; z-index: 1500; inset: 0 auto 0 0; width: min(320px, 85vw); transform: translateX(-105%); transition: transform .2s ease; }
  .ui-drawer-overlay { position: fixed; z-index: 1400; inset: 0; background: var(--overlay-medium); }
  .ui-drawer-open .ui-drawer { transform: translateX(0); }
  .ui-drawer-open .ui-drawer-overlay { display: block; }
  .ui-drawer-open { overflow: hidden; }
}

/* Формы */
.form-group {
    margin-bottom: var(--space-5);
}

.form-label {
    display: block;
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text-soft);
    margin-bottom: var(--space-2);
}

.form-control {
    width: 100%;
    height: 40px;
    padding: 0 var(--space-3);
    font-size: var(--text-sm);
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    transition: all 0.15s ease-in-out;
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary-500);
    box-shadow: var(--shadow-primary-focus);
}

/* Карточки */
.card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    box-shadow: none;
}

.card:hover { border-color: var(--color-border-strong); }

/* Student-specific Cards */
.card-student {
    border-radius: var(--radius-xl);
    border: 2px solid var(--color-border);
    box-shadow: 0 8px 0 var(--color-border);
    transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.card-student:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 0 var(--color-border-strong);
    border-color: var(--color-border-strong);
}

/* Бейджи */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
    font-weight: 600;
    border-radius: var(--radius-pill);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-info {
    background-color: var(--color-info-sky-100);
    color: var(--color-info-sky-700);
}

.badge-success {
    background-color: var(--color-success-100);
    color: var(--color-success-700);
}

.badge-warning {
    background-color: var(--color-warning-100);
    color: var(--color-warning-700);
}

.badge-danger {
    background-color: var(--color-danger-100);
    color: var(--color-danger-700);
}

/* Навигационные панели */
.navbar {
    height: 72px;
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
}

.brand {
    font-family: 'Outfit', sans-serif;
    font-size: var(--text-2xl);
    font-weight: 800;
    color: var(--color-primary-600);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.brand-student {
    color: var(--color-secondary-600);
}



/* Лендинг */
.hero {
    padding: var(--space-16) 0;
    text-align: center;
    background: radial-gradient(circle at 50% 50%, var(--color-primary-50) 0%, transparent 60%);
}

.hero-title {
    font-family: 'Outfit', sans-serif;
    font-size: 54px;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-4);
    background: linear-gradient(135deg, var(--color-primary-700) 0%, var(--color-secondary-600) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: var(--text-xl);
    color: var(--color-text-soft);
    max-width: 600px;
    margin: 0 auto var(--space-8) auto;
}


/* Утилиты нового дизайна (референс html_version/styles.css) */
.glass-card {
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.glass-panel {
    background-color: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow-sm);
}

.glass-button {
    background-color: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: background-color 0.15s ease-in-out;
}
.glass-button:hover {
    background-color: rgba(255, 255, 255, 0.3);
}

.hover-lift {
    transition: transform 0.3s ease-in-out;
}
.hover-lift:hover {
    transform: translateY(-4px);
}

.animate-fade-in {
    animation: fade-in 0.3s ease-out;
}

@keyframes fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}



/* Backoffice Training Builder Active Component */
.builder-layout {
    display: grid;
    grid-template-columns: 320px minmax(0, 1fr);
    gap: 20px;
    align-items: start;
  }
  @media (max-width: 900px) {
    .builder-layout {
      grid-template-columns: 1fr;
    }
  }

  /* Top Toolbar */
  .builder-topbar {
    padding: 14px 20px;
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 20px;
    position: sticky;
    top: 8px;
    z-index: 10;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
  }

  /* Tree Navigation Sidebar */
  .builder-tree-panel {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 16px;
    max-height: calc(100vh - 140px);
    overflow-y: auto;
    position: sticky;
    top: 82px;
  }
  .tree-search-box {
    margin-bottom: 14px;
  }
  .tree-section {
    margin-bottom: 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-neutral-50);
    overflow: hidden;
  }
  .tree-section-header {
    padding: 10px 12px;
    background: var(--color-surface-soft);
    font-weight: 700;
    font-size: 13px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    user-select: none;
  }
  .tree-block {
    margin: 6px 8px;
    border-left: 2px solid var(--color-primary-300);
    padding-left: 8px;
  }
  .tree-block-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--color-text-muted);
    padding: 4px 6px;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  .tree-lesson-item {
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    transition: all 0.15s ease;
    margin-top: 2px;
    border: 1px solid transparent;
  }
  .tree-lesson-item:hover {
    background: var(--color-border);
  }
  .tree-lesson-item.active {
    background: var(--backoffice-primary);
    color: var(--color-on-primary);
    font-weight: 600;
    box-shadow: 0 2px 6px rgb(var(--vibe-palm-rgb) / 0.3);
  }
  .tree-lesson-item.active .badge-sub {
    background: rgb(var(--vibe-white-rgb) / 0.2);
    color: var(--color-on-primary);
  }

  /* Main Workspace */
  .builder-workspace {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    min-height: 600px;
  }
  .workspace-header {
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 16px;
    margin-bottom: 20px;
  }
  .workspace-tabs {
    display: flex;
    gap: 8px;
    border-bottom: 2px solid var(--color-border);
    margin-bottom: 20px;
  }
  .workspace-tab-btn {
    padding: 10px 18px;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-muted);
    border: none;
    background: none;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all 0.2s;
  }
  .workspace-tab-btn.active {
    color: var(--backoffice-primary);
    border-bottom-color: var(--backoffice-primary);
  }

  /* Human-readable element cards */
  .element-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 14px;
    box-shadow: var(--shadow-sm);
    transition: border-color 0.2s, box-shadow 0.2s;
  }
  .element-card:hover {
    border-color: var(--backoffice-primary);
    box-shadow: 0 4px 12px rgb(var(--vibe-palm-rgb) / 0.08);
  }
  .element-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
  }
  .element-type-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
  }
  .type-rich_text { background: var(--backoffice-primary-soft); color: var(--backoffice-primary); }
  .type-video { background: var(--color-danger-100); color: var(--color-danger-700); }
  .type-audio { background: var(--color-warning-100); color: var(--color-warning-700); }
  .type-image { background: var(--color-success-100); color: var(--color-success-700); }
  .type-file { background: var(--color-secondary-100); color: var(--color-secondary-600); }
  .type-other { background: var(--color-surface-soft); color: var(--color-neutral-600); }

  /* Human-readable test questions */
  .question-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 14px;
  }
  .option-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 13px;
    margin: 3px;
    background: var(--color-surface);
    border: 1px solid var(--color-border-strong);
  }
  .option-pill.correct {
    background: var(--color-success-100);
    border-color: var(--color-success-300);
    color: var(--color-success-800);
    font-weight: 600;
  }

  /* Modals */
  .human-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: var(--overlay-builder);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
  }
  .human-modal.active {
    display: flex;
  }
  .human-modal-dialog {
    background: var(--color-surface);
    border-radius: 16px;
    width: min(640px, 92vw);
    max-height: 85vh;
    overflow-y: auto;
    padding: 24px;
    box-shadow: 0 20px 60px rgb(var(--vibe-ink-rgb) / 0.3);
  }
/* A domain logo reuses the shell's existing brand-mark geometry. */
.site-brand-image {
    object-fit: contain;
    background: transparent;
}