:root {
    --app-bg: #f5f7fb;
    --app-bg-soft: #fbfcfe;
    --app-surface: #ffffff;
    --app-surface-muted: #f3f6fa;
    --app-border: #d7dee8;
    --app-border-strong: #bcc7d6;
    --app-text: #1b1b1f;
    --app-muted: #605e5c;
    --app-accent: #0f6cbd;
    --app-accent-strong: #115ea3;
    --app-success: #107c10;
    --app-warning: #8a6100;
    --app-danger: #a4262c;
    --app-radius: 18px;
    --app-shadow: 0 10px 30px rgba(9, 30, 66, 0.08);
    --app-shadow-raised: 0 18px 46px rgba(9, 30, 66, 0.12);
    --app-font-body: "Segoe UI Variable Text", "Segoe UI", "Source Sans 3", sans-serif;
    --app-font-display: "Segoe UI Variable Display", "Segoe UI", "Space Grotesk", sans-serif;
}

body {
    font-family: var(--app-font-body);
    background:
        radial-gradient(880px 360px at -8% -10%, rgba(15, 108, 189, 0.09), transparent 72%),
        radial-gradient(620px 280px at 105% 0%, rgba(0, 120, 212, 0.08), transparent 72%),
        var(--app-bg);
}

.app-shell {
    width: min(100%, 1320px);
    margin: 0 auto;
    padding: 1.25rem 1rem 2.4rem;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 1.1rem;
}

.app-shell--auth {
    grid-template-columns: minmax(0, 680px);
    justify-content: center;
}

/* ── Collapsible sidebar ───────────────────────────────────── */
.app-sidebar {
    position: sticky;
    top: 84px;
    align-self: start;
    width: 280px;
    transition: width 0.25s ease;
}

.app-shell--collapsed .app-sidebar {
    width: 48px;
}

.app-sidebar__rail {
    display: flex;
    flex-direction: column;
    height: 100%;
    border-radius: var(--app-radius);
    background: #1b1b1f;
    color: #d1d1d6;
    box-shadow: var(--app-shadow);
    padding: 0.55rem;
    overflow: hidden;
}

.sidebar-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 10px;
    background: transparent;
    color: #d1d1d6;
    cursor: pointer;
    flex-shrink: 0;
    transition: background 0.18s ease;
}

.sidebar-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
}

.app-nav {
    display: grid;
    gap: 0.25rem;
    margin: 0.75rem 0;
    flex: 1;
}

.app-nav__item {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    border-radius: 10px;
    color: #c8c8cc;
    text-decoration: none;
    font-family: var(--app-font-body);
    font-size: 0.88rem;
    font-weight: 600;
    padding: 0.55rem 0.6rem;
    transition: background 0.18s ease, color 0.18s ease;
    border: 1px solid transparent;
    white-space: nowrap;
    overflow: hidden;
}

.app-nav__icon {
    flex-shrink: 0;
}

.app-nav__label {
    opacity: 1;
    transition: opacity 0.2s ease;
    overflow: hidden;
    text-overflow: ellipsis;
}

.app-shell--collapsed .app-nav__label {
    opacity: 0;
    width: 0;
}

.app-nav__item:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #ffffff;
}

.app-nav__item.is-active {
    background: rgba(15, 108, 189, 0.25);
    color: #6db8f2;
    border-color: rgba(15, 108, 189, 0.35);
}

/* Sidebar user area */
.app-sidebar__user {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 0.65rem;
    margin-top: auto;
    overflow: hidden;
}

.app-avatar {
    width: 32px;
    height: 32px;
    border-radius: 999px;
    background: var(--app-accent);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.72rem;
    font-weight: 700;
    flex-shrink: 0;
    letter-spacing: 0.02em;
}

.app-sidebar__user-info {
    overflow: hidden;
    opacity: 1;
    transition: opacity 0.2s ease;
}

.app-shell--collapsed .app-sidebar__user-info {
    opacity: 0;
    width: 0;
}

.app-sidebar__name {
    margin: 0;
    font-size: 0.82rem;
    font-weight: 600;
    color: #e4e4e8;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.app-sidebar__email {
    margin: 0;
    font-size: 0.74rem;
    color: #8e8e93;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.app-role-badge {
    flex-shrink: 0;
    border-radius: 999px;
    padding: 0.15rem 0.5rem;
    background: rgba(15, 108, 189, 0.2);
    color: #6db8f2;
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    white-space: nowrap;
    transition: opacity 0.2s ease;
}

.app-shell--collapsed .app-role-badge {
    position: absolute;
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0;
    width: 8px;
    height: 8px;
    padding: 0;
    background: var(--app-accent);
}

.app-shell--collapsed .app-sidebar__user {
    flex-direction: column;
    position: relative;
}

/* ── Breadcrumbs ───────────────────────────────────────────── */
.app-breadcrumbs {
    margin-bottom: 0.75rem;
}

.app-breadcrumbs ol {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.82rem;
    color: var(--app-muted);
}

.app-breadcrumbs li + li::before {
    content: '\203A';
    margin-right: 0.25rem;
    color: var(--app-border-strong);
}

.app-breadcrumbs a {
    color: var(--app-muted);
    text-decoration: none;
    transition: color 0.15s ease;
}

.app-breadcrumbs a:hover {
    color: var(--app-accent);
}

.app-breadcrumbs li:last-child a {
    color: var(--app-text);
    pointer-events: none;
}

/* ── Tab component (shared) ────────────────────────────────── */
.tab-bar {
    display: flex;
    gap: 0;
    border-bottom: 1px solid var(--app-border);
    margin-bottom: 1rem;
}

.tab-bar__item {
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--app-muted);
    font-family: var(--app-font-body);
    font-size: 0.9rem;
    font-weight: 600;
    padding: 0.7rem 1.1rem;
    cursor: pointer;
    transition: color 0.15s ease, border-color 0.15s ease;
    white-space: nowrap;
}

.tab-bar__item:hover {
    color: var(--app-text);
}

.tab-bar__item[aria-selected="true"] {
    color: var(--app-accent);
    border-bottom-color: var(--app-accent);
}

.tab-panel[hidden] {
    display: none;
}

/* ── View toggle (shared) ──────────────────────────────────── */
.view-toggle {
    display: inline-flex;
    border: 1px solid var(--app-border);
    border-radius: 10px;
    overflow: hidden;
}

.view-toggle button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 32px;
    background: var(--app-surface);
    border: none;
    color: var(--app-muted);
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease;
}

.view-toggle button + button {
    border-left: 1px solid var(--app-border);
}

.view-toggle button:hover {
    background: var(--app-surface-muted);
    color: var(--app-text);
}

.view-toggle button.is-active {
    background: var(--app-accent);
    color: #ffffff;
}

.app-main {
    min-width: 0;
}

.app-header {
    border-radius: var(--app-radius);
    background: linear-gradient(180deg, #ffffff 0%, #f8fbfe 100%);
    border: 1px solid var(--app-border);
    box-shadow: var(--app-shadow);
    padding: 1.2rem 1.25rem;
    margin-bottom: 1.1rem;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.app-header h1 {
    margin: 0;
    color: var(--app-text);
    font-family: var(--app-font-display);
    font-size: clamp(1.65rem, 3.2vw, 2.45rem);
    letter-spacing: -0.03em;
}

.app-intro {
    margin: 0.55rem 0 0;
    max-width: 760px;
    color: var(--app-muted);
}

.app-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
}

.app-section {
    margin-bottom: 1rem;
}

.metric-grid,
.card-grid {
    display: grid;
    gap: 0.85rem;
}

.metric-grid {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.card-grid {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.metric-card {
    padding: 1rem;
    border-radius: 16px;
    background: linear-gradient(145deg, #ffffff 0%, #f1f8ff 100%);
    border: 1px solid var(--app-border);
    box-shadow: 0 10px 24px rgba(8, 20, 41, 0.08);
}

.metric-label,
.muted {
    color: var(--app-muted);
}

.metric-card strong {
    display: block;
    margin-top: 0.35rem;
    font-size: 1.68rem;
    letter-spacing: -0.03em;
    font-family: var(--app-font-display);
    color: var(--app-text);
}

.portal-card {
    border-radius: var(--app-radius);
    border: 1px solid var(--app-border);
    background: var(--app-surface);
    box-shadow: var(--app-shadow);
    padding: 1.05rem;
}

.portal-card h2,
.portal-card h3 {
    margin: 0;
    color: var(--app-text);
    font-family: var(--app-font-display);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.85rem;
}

.progress-bar {
    width: 100%;
    height: 11px;
    border-radius: 999px;
    overflow: hidden;
    background: #deebf8;
}

.progress-bar__fill {
    height: 100%;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--app-accent), var(--app-success));
}

.course-card__meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.75rem;
    color: var(--app-muted);
    font-size: 0.9rem;
}

.course-card h3 {
    margin: 0.65rem 0;
}

.two-column {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.85rem;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.92rem;
}

.data-table th,
.data-table td {
    text-align: left;
    padding: 0.62rem 0.42rem;
    border-bottom: 1px solid var(--app-border);
    vertical-align: top;
}

.data-table th {
    color: var(--app-muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.data-table tbody tr:nth-child(even) {
    background: #fbfcfe;
}

.data-table tbody tr:hover {
    background: #f0f4fa;
}

.feature-list {
    margin: 0;
    padding-left: 1rem;
}

.feature-list li {
    margin: 0.4rem 0;
}

.callout {
    margin-top: 0.85rem;
    border-radius: 14px;
    border: 1px solid #cfe1f4;
    background: #f5f9fd;
    padding: 0.85rem;
}

.auth-panel {
    display: flex;
    justify-content: center;
}

.auth-card {
    width: min(100%, 540px);
    border-radius: 24px;
    border: 1px solid var(--app-border);
    background: linear-gradient(180deg, #ffffff 0%, #f9fbfd 100%);
    box-shadow: var(--app-shadow-raised);
    padding: 1.5rem;
}

.auth-form {
    display: grid;
    gap: 0.75rem;
}

.auth-meta h3 {
    margin-bottom: 0.35rem;
    font-size: 1.03rem;
}

.app-alert {
    border-radius: 12px;
    padding: 0.65rem 0.8rem;
    border: 1px solid transparent;
    margin-bottom: 0.75rem;
}

.app-alert--info {
    background: #eaf6ff;
    border-color: #9fd3fa;
    color: #14537f;
}

.app-alert--error {
    background: #fff0f0;
    border-color: #f1bbbb;
    color: var(--app-danger);
}

.app-alert--warning {
    background: #fff8eb;
    border-color: #f5d39a;
    color: var(--app-warning);
}

.identity-card {
    display: grid;
    gap: 1rem;
}

.identity-card__hero {
    display: grid;
    gap: 0.55rem;
}

.identity-card__hero h2 {
    margin: 0;
    font-size: clamp(1.45rem, 2.4vw, 1.9rem);
}

.identity-card__grid {
    display: grid;
    grid-template-columns: 1.25fr 0.95fr;
    gap: 0.9rem;
}

.identity-panel {
    border-radius: 16px;
    border: 1px solid var(--app-border);
    background: #f8fbfd;
    padding: 1rem;
}

.identity-panel--accent {
    background: linear-gradient(180deg, #f5f9fe 0%, #edf5fd 100%);
    border-color: #c7def4;
}

.identity-panel h3 {
    margin-bottom: 0.45rem;
}

.identity-list {
    margin: 0;
    padding-left: 1.15rem;
    color: var(--app-muted);
}

.identity-list li + li {
    margin-top: 0.45rem;
}

/* Course viewer */
.app-course .course-layout {
    display: grid;
    grid-template-columns: minmax(250px, 290px) minmax(0, 1fr);
    gap: 1rem;
}

.course-sidebar {
    position: sticky;
    top: 84px;
    align-self: start;
}

.course-sidebar__header {
    display: grid;
    gap: 0.5rem;
}

.course-sidebar__header p {
    margin: 0;
    color: var(--app-muted);
}

.course-sidebar__stats {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
    margin: 1rem 0;
}

.course-stat {
    border-radius: 14px;
    border: 1px solid var(--app-border);
    background: var(--app-surface-muted);
    padding: 0.75rem 0.8rem;
}

.course-stat strong {
    display: block;
    margin-top: 0.2rem;
    font-size: 1.15rem;
    font-family: var(--app-font-display);
    color: var(--app-text);
}

.course-stat__label {
    display: block;
    color: var(--app-muted);
    font-size: 0.76rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.module-group + .module-group {
    margin-top: 1rem;
}

.module-group h3 {
    margin: 0 0 0.45rem;
    color: var(--app-muted);
    font-family: var(--app-font-display);
    font-size: 0.77rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.module-lessons {
    display: grid;
    gap: 0.35rem;
}

.lesson-link {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 0.55rem;
    border-radius: 12px;
    border: 1px solid var(--app-border);
    background: #fbfcfe;
    color: var(--app-text);
    text-decoration: none;
    padding: 0.72rem 0.76rem;
    font-size: 0.92rem;
}

.lesson-link:hover {
    border-color: #a8cdee;
    background: #f5f9fd;
}

.lesson-link.is-active {
    background: #edf5fd;
    border-color: #c7def4;
    color: var(--app-accent);
}

.lesson-link__number {
    color: var(--app-muted);
    font-size: 0.8rem;
}

.lesson-link__title {
    min-width: 0;
}

.lesson-link__status,
.pill {
    border-radius: 999px;
    padding: 0.18rem 0.52rem;
    background: #def6dd;
    color: #0f6a0f;
    font-size: 0.73rem;
    font-family: var(--app-font-body);
    font-weight: 600;
}

.pill--neutral {
    background: #edf1f6;
    color: #424242;
}

.course-main {
    display: grid;
    gap: 1rem;
}

.lesson-frame {
    padding: 1.25rem;
}

.lesson-frame__header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--app-border);
}

.lesson-frame__title h2 {
    margin: 0;
    font-size: clamp(1.5rem, 2.4vw, 2rem);
}

.lesson-frame__summary {
    margin: 0.45rem 0 0;
    color: var(--app-muted);
    display: inline-flex;
    gap: 0.45rem;
    flex-wrap: wrap;
}

.lesson-frame__actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.lesson-progress-chip {
    border-radius: 999px;
    border: 1px solid #c7def4;
    background: #edf5fd;
    color: var(--app-accent);
    padding: 0.4rem 0.7rem;
    font-size: 0.84rem;
    font-weight: 600;
}

.lesson-brief {
    display: grid;
    gap: 0.8rem;
    margin-bottom: 1rem;
    border-radius: 16px;
    border: 1px solid var(--app-border);
    background: linear-gradient(180deg, #fafcfe 0%, #f5f8fb 100%);
    padding: 1rem;
}

.lesson-brief__label {
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--app-accent);
}

.lesson-brief__list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 0.7rem 1rem;
    margin: 0;
    padding-left: 1.15rem;
}

.lesson-video {
    overflow: hidden;
    border-radius: 16px;
    border: 1px solid #aeb9ca;
    background: #0f1724;
    margin-bottom: 1rem;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.lesson-video iframe,
.lesson-video video {
    display: block;
    width: 100%;
    min-height: 340px;
    border: 0;
}

.lesson-richtext {
    color: var(--app-text);
}

.lesson-richtext--surface {
    border-radius: 18px;
    border: 1px solid var(--app-border);
    background: #ffffff;
    padding: 1.1rem 1.2rem;
}

.lesson-richtext h1,
.lesson-richtext h2,
.lesson-richtext h3 {
    margin-top: 1.35rem;
    letter-spacing: -0.02em;
}

.lesson-richtext p,
.lesson-richtext li {
    color: #323130;
    line-height: 1.72;
}

.lesson-richtext p + p,
.lesson-richtext ul + p,
.lesson-richtext ol + p {
    margin-top: 0.85rem;
}

.lesson-script {
    white-space: pre-wrap;
    border-radius: 12px;
    border: 1px solid var(--app-border);
    background: #f2f8ff;
    padding: 0.8rem;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 0.88rem;
}

.lesson-empty-state {
    text-align: center;
    padding: 1.8rem 1rem;
}

.lesson-empty-state h3 {
    margin-bottom: 0.45rem;
}

.lesson-footer-nav {
    display: flex;
    justify-content: space-between;
    gap: 0.9rem;
    align-items: center;
    flex-wrap: wrap;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--app-border);
}

.lesson-complete-flag {
    display: inline-flex;
    align-items: center;
    min-height: 46px;
    border-radius: 12px;
    border: 1px solid #b8d8b8;
    background: #eff8ef;
    color: var(--app-success);
    padding: 0 0.95rem;
    font-weight: 600;
}

.course-secondary-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.lesson-status-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.85rem;
    margin-bottom: 0.85rem;
}

.lesson-status-grid strong {
    display: block;
    margin-top: 0.25rem;
    font-family: var(--app-font-display);
    font-size: 1.05rem;
}

.learning-blocks {
    display: grid;
    gap: 0.95rem;
}

.learning-block + .learning-block {
    margin-top: 0.8rem;
}

.learning-block__prompt {
    margin: 0.4rem 0 0;
    color: var(--app-muted);
}

.question-list {
    margin: 0;
    padding-left: 1rem;
}

.question-list li {
    margin: 0.42rem 0;
}

.submission-form {
    margin-top: 0.8rem;
    display: grid;
    gap: 0.65rem;
}

.learning-block__submission-note {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    flex-wrap: wrap;
    margin-top: 0.85rem;
    margin-bottom: 0.2rem;
    color: var(--app-muted);
    font-size: 0.9rem;
}

.submission-status {
    margin: 0;
    font-size: 0.88rem;
}

.empty-card {
    text-align: center;
}

@media (max-width: 1100px) {
    .app-shell {
        grid-template-columns: 1fr;
    }

    .app-sidebar {
        display: none;
    }

    .course-sidebar {
        position: static;
    }

    .app-course .course-layout,
    .two-column,
    .course-secondary-grid,
    .identity-card__grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 760px) {
    .app-shell {
        padding: 1rem 0.7rem 1.6rem;
    }

    .app-header,
    .lesson-frame__header,
    .auth-links,
    .app-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .auth-grid {
        grid-template-columns: 1fr;
    }

    .lesson-video iframe,
    .lesson-video video {
        min-height: 240px;
    }

    .lesson-brief__list,
    .lesson-status-grid,
    .course-sidebar__stats {
        grid-template-columns: 1fr;
    }

    .lesson-frame,
    .portal-card,
    .auth-card {
        padding: 1rem;
    }
}

/* ── Hero continue card ──────────────────────────────────────── */
.hero-continue {
    border-radius: var(--app-radius);
    border: 1px solid var(--app-border);
    border-left: 4px solid var(--app-accent);
    background: linear-gradient(135deg, #ffffff 0%, #f5f9fe 100%);
    box-shadow: var(--app-shadow);
    padding: 1.35rem 1.4rem;
}

.hero-continue__body {
    display: grid;
    gap: 0.55rem;
}

.hero-continue__eyebrow {
    font-size: 0.76rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--app-accent);
}

.hero-continue__title {
    margin: 0;
    font-family: var(--app-font-display);
    font-size: clamp(1.25rem, 2.2vw, 1.65rem);
    letter-spacing: -0.02em;
    color: var(--app-text);
}

.hero-continue__progress-row {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    flex-wrap: wrap;
}

.hero-continue__pct {
    font-weight: 700;
    font-size: 0.92rem;
    color: var(--app-accent);
    min-width: 2.5rem;
}

.hero-continue__bar {
    flex: 1;
    min-width: 120px;
}

.hero-continue__lessons {
    font-size: 0.85rem;
    color: var(--app-muted);
    white-space: nowrap;
}

.hero-continue__cta {
    justify-self: start;
}

/* ── Course card thumbnail placeholder ───────────────────────── */
.course-card__thumb {
    height: 120px;
    border-radius: 14px 14px 0 0;
    margin: -1.05rem -1.05rem 0;
    background: linear-gradient(145deg, #e4ecf5 0%, #d0dced 50%, #c5d4e8 100%);
}

.course-card__content {
    padding-top: 0.85rem;
    display: grid;
    gap: 0.45rem;
}

/* ── Status pills ────────────────────────────────────────────── */
.status-pill {
    display: inline-block;
    border-radius: 999px;
    padding: 0.18rem 0.58rem;
    font-size: 0.73rem;
    font-weight: 600;
    font-family: var(--app-font-body);
    background: #edf1f6;
    color: #424242;
    white-space: nowrap;
}

.status-pill--progress {
    background: #e0edff;
    color: #0f5fbf;
}

.status-pill--complete {
    background: #def6dd;
    color: #0f6a0f;
}

.status-pill--neutral {
    background: #edf1f6;
    color: #424242;
}

.status-pill--warning {
    background: #fff8eb;
    color: #8a6100;
}

.status-pill--danger {
    background: #fff0f0;
    color: #a4262c;
}

/* ── Course card progress row ────────────────────────────────── */
.course-card__progress-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
}

.course-card__pct {
    font-weight: 700;
    color: var(--app-accent);
    min-width: 2rem;
}

.course-card__lesson-count {
    color: var(--app-muted);
    white-space: nowrap;
    font-size: 0.82rem;
}

/* ── Overview mode (all panels visible, tabs hidden) ─────────── */
[data-view="overview"] .tab-bar {
    display: none;
}

[data-view="overview"] [role="tabpanel"] {
    display: block !important;
}

[data-view="overview"] [role="tabpanel"][hidden] {
    display: block !important;
}

[data-view="overview"] [role="tabpanel"] + [role="tabpanel"] {
    margin-top: 1.25rem;
}

/* ── Empty state ─────────────────────────────────────────────── */
.empty-state {
    text-align: center;
    padding: 2.5rem 1.5rem;
    border-radius: var(--app-radius);
    border: 1px solid var(--app-border);
    background: var(--app-surface);
    box-shadow: var(--app-shadow);
}

.empty-state h3 {
    margin: 0 0 0.45rem;
    font-family: var(--app-font-display);
    font-size: 1.25rem;
    color: var(--app-text);
}

.empty-state p {
    margin: 0 auto 1.15rem;
    max-width: 420px;
    color: var(--app-muted);
    line-height: 1.6;
}

.empty-state .app-button {
    display: inline-block;
}

.empty-state__placeholder {
    width: 120px;
    height: 80px;
    background: linear-gradient(135deg, #e8edf4, #d7dee8);
    border-radius: 12px;
    margin: 0 auto 1rem;
}

/* ── Org dashboard toolbar ─────────────────────────────────── */
.org-toolbar {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    margin-bottom: 0.5rem;
}

/* ── Org dashboard divider ─────────────────────────────────── */
.org-divider {
    border: none;
    border-top: 1px solid var(--app-border);
    margin: 1.1rem 0;
}

/* ── Inline form feedback ──────────────────────────────────── */
.form-feedback {
    min-height: 1.4em;
    font-size: 0.88rem;
    color: var(--app-success);
}

.form-feedback--error {
    color: var(--app-danger);
}

/* ── Admin dashboard: org search filter ──────────────────────── */
.admin-filter {
    margin-bottom: 0.85rem;
}

.admin-filter__input {
    width: 100%;
    max-width: 360px;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--app-border);
    border-radius: var(--app-radius);
    font-size: 0.88rem;
    font-family: var(--app-font-body);
    background: var(--app-surface);
    color: var(--app-text);
    transition: border-color 0.15s ease;
}

.admin-filter__input:focus {
    outline: none;
    border-color: var(--app-accent);
    box-shadow: 0 0 0 2px rgba(30, 90, 170, 0.12);
}

/* ── Admin dashboard: integration status dots ────────────────── */
.integration-status {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    font-size: 0.88rem;
}

.integration-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.integration-dot--configured {
    background: #107c10;
}

.integration-dot--pending {
    background: #8a6100;
}

/* ── Admin dashboard: feature card grid ──────────────────────── */
.feature-card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1rem;
}

.feature-card {
    border-radius: var(--app-radius);
    border: 1px solid var(--app-border);
    background: var(--app-surface);
    box-shadow: var(--app-shadow);
    padding: 1.25rem 1.15rem;
    cursor: pointer;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.feature-card:hover {
    border-color: var(--app-accent);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.feature-card h3 {
    margin: 0 0 0.35rem;
    font-family: var(--app-font-display);
    font-size: 1rem;
    color: var(--app-text);
}

.feature-card p {
    margin: 0;
    font-size: 0.85rem;
    color: var(--app-muted);
    line-height: 1.5;
}

/* ── Course viewer v2: dot rail + focus/study modes ──────────── */
.course-sidebar-v2 {
    position: sticky;
    top: 84px;
    align-self: start;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: width 0.25s ease;
}

.course-rail__toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 10px;
    background: transparent;
    color: var(--app-muted);
    cursor: pointer;
    flex-shrink: 0;
    margin-bottom: 6px;
    transition: background 0.18s ease, color 0.15s ease;
}

.course-rail__toggle:hover {
    background: var(--app-surface-muted);
    color: var(--app-text);
}

/* Dot rail */
.course-dot-rail {
    width: 48px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 12px 0;
}

.course-dot {
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.15s ease;
    display: block;
    text-decoration: none;
}

.course-dot:hover {
    transform: scale(1.3);
}

.course-dot--done {
    width: 10px;
    height: 10px;
    background: #107c10;
}

.course-dot--current {
    width: 12px;
    height: 12px;
    background: #0f6cbd;
    box-shadow: 0 0 6px rgba(15, 108, 189, 0.5);
}

.course-dot--pending {
    width: 8px;
    height: 8px;
    background: #bcc7d6;
}

/* Full sidebar (study mode) */
.course-sidebar-full {
    display: none;
    width: 280px;
    border-radius: var(--app-radius);
    border: 1px solid var(--app-border);
    background: var(--app-surface);
    box-shadow: var(--app-shadow);
    padding: 1rem;
    overflow-y: auto;
    max-height: calc(100vh - 120px);
}

.course-sidebar-full__header {
    display: grid;
    gap: 0.35rem;
    margin-bottom: 0.75rem;
}

.course-sidebar-full__header h2 {
    margin: 0;
    font-size: 1.05rem;
}

.course-sidebar-full__pct {
    margin: 0;
    color: var(--app-muted);
    font-size: 0.85rem;
}

/* ── Focus mode (default) ────────────────────────────────────── */
.course-layout--focus .course-sidebar-v2 {
    width: 48px;
}

.course-layout--focus .course-dot-rail {
    display: flex;
}

.course-layout--focus .course-sidebar-full {
    display: none;
}

.course-layout--focus {
    grid-template-columns: 48px minmax(0, 1fr);
}

/* ── Study mode ──────────────────────────────────────────────── */
.course-layout--study .course-sidebar-v2 {
    width: 280px;
    align-items: stretch;
}

.course-layout--study .course-dot-rail {
    display: none;
}

.course-layout--study .course-sidebar-full {
    display: block;
}

.course-layout--study {
    grid-template-columns: 280px minmax(0, 1fr);
}

/* Lesson tabs section spacing */
.lesson-tabs-section {
    margin-top: 1.25rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--app-border);
}

.lesson-tabs-section .learning-blocks {
    margin-top: 0;
}

.lesson-tabs-section .portal-card {
    margin-top: 0;
}

/* Mark complete flash animation */
@keyframes complete-flash {
    0% { background: var(--app-success); }
    100% { background: transparent; }
}

.app-button--complete-flash {
    animation: complete-flash 0.6s ease forwards;
    color: #ffffff;
}

/* ── Course viewer v2 responsive ─────────────────────────────── */
@media (max-width: 1100px) {
    .course-layout--focus,
    .course-layout--study {
        grid-template-columns: 1fr;
    }

    .course-sidebar-v2 {
        position: static;
    }

    .course-layout--focus .course-sidebar-v2,
    .course-layout--study .course-sidebar-v2 {
        width: 100%;
        flex-direction: row;
        flex-wrap: wrap;
    }

    .course-layout--focus .course-dot-rail {
        flex-direction: row;
        width: auto;
        padding: 6px 0;
    }

    .course-layout--study .course-sidebar-full {
        width: 100%;
        max-height: none;
    }
}

/* ── Button hierarchy ──────────────────────────────────────── */
.app-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    min-height: 38px;
    padding: 0.5rem 1.1rem;
    border: 1px solid transparent;
    border-radius: 10px;
    background: var(--app-accent);
    color: #ffffff;
    font-family: var(--app-font-body);
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: background 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.app-button:hover {
    background: var(--app-accent-strong);
}

.app-button--secondary {
    background: transparent;
    border-color: var(--app-accent);
    color: var(--app-accent);
}

.app-button--secondary:hover {
    background: rgba(15, 108, 189, 0.08);
}

.app-button--tertiary {
    background: transparent;
    border-color: transparent;
    color: var(--app-accent);
    padding-left: 0.5rem;
    padding-right: 0.5rem;
}

.app-button--tertiary:hover {
    text-decoration: underline;
}

.app-button--full {
    width: 100%;
}

.app-button:disabled,
.app-button[disabled] {
    opacity: 0.55;
    cursor: not-allowed;
}

/* ── Accessibility: focus-visible outlines ─────────────────── */
.app-nav__item:focus-visible {
    outline: 2px solid rgba(255, 255, 255, 0.6);
    outline-offset: 2px;
}

.tab-bar__item:focus-visible {
    outline: 2px solid var(--app-accent);
    outline-offset: 2px;
}

.sidebar-toggle:focus-visible {
    outline: 2px solid rgba(255, 255, 255, 0.6);
    outline-offset: 2px;
}

.view-toggle button:focus-visible {
    outline: 2px solid var(--app-accent);
    outline-offset: 2px;
}

.app-button:focus-visible {
    outline: 2px solid var(--app-accent);
    outline-offset: 2px;
}

/* ── Form input styling ────────────────────────────────────── */
.app-shell input[type="text"],
.app-shell input[type="email"],
.app-shell input[type="url"],
.app-shell input[type="password"],
.app-shell textarea,
.app-shell select {
    width: 100%;
    padding: 0.6rem 0.75rem;
    border: 1px solid var(--app-border);
    border-radius: 10px;
    font-family: var(--app-font-body);
    font-size: 0.9rem;
    background: var(--app-surface);
    color: var(--app-text);
    transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.app-shell input:focus,
.app-shell textarea:focus,
.app-shell select:focus {
    border-color: var(--app-accent);
    box-shadow: 0 0 0 3px rgba(15, 108, 189, 0.15);
    outline: none;
}

/* ── Reduced motion preference ───────────────────────────── */
@media (prefers-reduced-motion: reduce) {
    .app-sidebar, .app-nav__label, .app-nav__item, .sidebar-toggle,
    .course-dot, .tab-bar__item, .view-toggle button {
        transition: none;
    }
    @keyframes complete-flash { from, to { background: var(--app-success); } }
}

/* ── Preview mode: locked lesson indicators ──────────────── */
.course-dot--locked {
    opacity: 0.3;
    cursor: not-allowed;
    pointer-events: none;
}

.lesson-link--locked {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.75rem;
    font-size: 0.85rem;
    color: var(--app-muted, #6b7280);
}

/* ── Module Quiz: sidebar entry ──────────────────────────── */
.lesson-link--quiz {
    border: 1px dashed rgba(15, 108, 189, 0.35);
    background: rgba(15, 108, 189, 0.04);
    margin-top: 0.15rem;
}
.lesson-link--quiz .lesson-link__number,
.lesson-link--quiz .lesson-link__title {
    color: var(--app-accent);
}
.lesson-link--quiz:hover {
    border-color: var(--app-accent);
    background: rgba(15, 108, 189, 0.08);
}
.lesson-link--quiz.is-active {
    background: rgba(15, 108, 189, 0.12);
    border-color: var(--app-accent);
}
.lesson-link__badge {
    border-radius: 4px;
    padding: 0.12rem 0.44rem;
    background: var(--app-accent);
    color: #fff;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}
.lesson-link__status--score {
    background: #def6dd;
    color: #0f6a0f;
}

/* ── Module Quiz: intro card ─────────────────────────────── */
.quiz-intro {
    text-align: center;
    padding: 2.5rem 1.5rem;
}
.quiz-intro__icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: rgba(15, 108, 189, 0.1);
    color: var(--app-accent);
    font-size: 1.8rem;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}
.quiz-intro__last-score {
    margin-top: 0.5rem;
    font-size: 0.92rem;
}

/* ── Module Quiz: question cards ─────────────────────────── */
.quiz-questions {
    display: grid;
    gap: 1.25rem;
    padding: 0.5rem 0;
}
.quiz-question {
    border: 1px solid var(--app-border);
    border-radius: var(--app-radius);
    padding: 1.1rem;
    background: var(--app-surface);
}
.quiz-question__header {
    display: flex;
    gap: 0.65rem;
    align-items: flex-start;
    margin-bottom: 0.85rem;
}
.quiz-question__num {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--app-accent);
    color: #fff;
    font-size: 0.8rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}
.quiz-question__text {
    margin: 0;
    font-size: 0.95rem;
    line-height: 1.45;
}
.quiz-question__options {
    display: grid;
    gap: 0.4rem;
    padding-left: 0.25rem;
}
.quiz-option {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.6rem 0.75rem;
    border: 1px solid var(--app-border);
    border-radius: 10px;
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s;
}
.quiz-option:hover {
    border-color: #a8cdee;
    background: #f5f9fd;
}
.quiz-option input[type="radio"] {
    display: none;
}
.quiz-option input[type="radio"]:checked + .quiz-option__key {
    background: var(--app-accent);
    color: #fff;
}
.quiz-option input[type="radio"]:checked ~ .quiz-option__text {
    font-weight: 600;
}
.quiz-option__key {
    flex-shrink: 0;
    width: 26px;
    height: 26px;
    border-radius: 6px;
    background: var(--app-surface-muted);
    color: var(--app-muted);
    font-size: 0.75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s, color 0.15s;
}
.quiz-option__text {
    font-size: 0.9rem;
}
.quiz-submit-btn {
    margin-top: 0.5rem;
    justify-self: center;
}
.quiz-submit-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    pointer-events: none;
}

/* Option selected highlight */
.quiz-option--selected {
    border-color: var(--app-accent) !important;
    background: rgba(15, 108, 189, 0.08) !important;
    box-shadow: 0 0 0 2px rgba(15, 108, 189, 0.15);
}
.quiz-option--selected .quiz-option__key {
    background: var(--app-accent);
    color: #fff;
}

/* Progress counter */
.quiz-progress-counter {
    text-align: center;
    font-size: 0.85rem;
    color: var(--app-muted);
    margin-top: 0.35rem;
}

/* Score banner: pass / fail */
.quiz-score-banner {
    text-align: center;
    padding: 2.5rem 1.5rem;
    border-radius: var(--app-radius);
    margin-bottom: 1.25rem;
}
.quiz-score-banner--pass {
    background: #def6dd;
    border: 1px solid #b7e8b5;
}
.quiz-score-banner--fail {
    background: #fde8e8;
    border: 1px solid #f5c6c6;
}
.quiz-score-banner__score {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}
.quiz-pass-label {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--app-success);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}
.quiz-fail-label {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--app-danger);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}
.quiz-score-banner__actions {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

/* Explanation toggle */
.quiz-explain-toggle {
    display: inline-block;
    margin-top: 0.5rem;
    padding: 0.35rem 0.75rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--app-accent);
    background: none;
    border: 1px solid var(--app-accent);
    border-radius: 8px;
    cursor: pointer;
}
.quiz-explain-toggle:hover {
    background: rgba(15, 108, 189, 0.06);
}

/* Result option highlights */
.quiz-result-option--wrong {
    background: #fde8e8;
    border: 1px solid #e8a0a0;
    border-radius: 8px;
}
.quiz-result-option--wrong .quiz-option__key {
    background: var(--app-danger);
    color: #fff;
}
.quiz-result-option--right {
    background: #def6dd;
    border: 1px solid #a8d8a5;
    border-radius: 8px;
}
.quiz-result-option--right .quiz-option__key {
    background: var(--app-success);
    color: #fff;
}

/* ── Module Quiz: results ────────────────────────────────── */
.quiz-results__banner {
    border-radius: var(--app-radius);
    padding: 1.25rem 1.5rem;
    margin-bottom: 1.25rem;
}
.quiz-results__banner h3 {
    margin: 0 0 0.25rem;
}
.quiz-results__banner--pass {
    background: #def6dd;
    color: #0f6a0f;
    border: 1px solid #b7e8b5;
}
.quiz-results__banner--review {
    background: #fff3cd;
    color: #664d00;
    border: 1px solid #ffe69c;
}
.quiz-results__banner ul {
    margin: 0.5rem 0 0 1.2rem;
    padding: 0;
}
.quiz-results__banner a {
    color: inherit;
    font-weight: 600;
}
.quiz-results__questions {
    display: grid;
    gap: 1rem;
}
.quiz-result-card {
    border-radius: var(--app-radius);
    padding: 1rem 1.1rem;
    border: 1px solid var(--app-border);
}
.quiz-result-card--correct {
    border-left: 3px solid var(--app-success);
}
.quiz-result-card--wrong {
    border-left: 3px solid var(--app-danger);
}
.quiz-result-card__header {
    display: flex;
    gap: 0.65rem;
    align-items: flex-start;
    margin-bottom: 0.75rem;
}
.quiz-result-card__header p {
    margin: 0;
    font-weight: 600;
}
.quiz-result-card__options {
    display: grid;
    gap: 0.3rem;
    margin-bottom: 0.75rem;
}
.quiz-result-option {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.45rem 0.6rem;
    border-radius: 8px;
    font-size: 0.88rem;
}
.quiz-result-option--correct {
    background: #def6dd;
    font-weight: 600;
}
.quiz-result-option--correct .quiz-option__key {
    background: var(--app-success);
    color: #fff;
}
.quiz-result-option--selected {
    background: #fde8e8;
}
.quiz-result-option--selected .quiz-option__key {
    background: var(--app-danger);
    color: #fff;
}
.quiz-result-card__explanation {
    font-size: 0.85rem;
    line-height: 1.5;
    color: var(--app-muted);
    padding: 0.65rem 0.75rem;
    background: var(--app-surface-muted);
    border-radius: 8px;
}
.quiz-result-card__explanation a {
    color: var(--app-accent);
}

/* ── Notification bell + dropdown ────────────────────────── */
.notification-badge {
    position: absolute;
    top: 2px;
    right: 2px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--app-danger);
    pointer-events: none;
}

.notification-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    width: 320px;
    max-height: 400px;
    overflow-y: auto;
    background: var(--app-surface);
    border: 1px solid var(--app-border, #e2e8f0);
    border-radius: var(--app-radius, 12px);
    box-shadow: var(--app-shadow);
    z-index: 50;
    padding: 0.25rem;
}

.notification-item {
    display: block;
    padding: 0.65rem 0.75rem;
    border-bottom: 1px solid var(--app-border, #e2e8f0);
    text-decoration: none;
    color: inherit;
    border-radius: 8px;
}

.notification-item:hover {
    background: var(--app-bg-soft);
}

.notification-item:last-child {
    border-bottom: none;
}