/* The Academy of Alexandria — executive / futuristic theme */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Playfair+Display:wght@600;700&display=swap');

:root {
    --bg-deep: #070b12;
    --bg-main: #0c1220;
    --bg-glass: rgba(18, 26, 46, 0.72);
    --border-subtle: rgba(201, 162, 39, 0.22);
    --border-glow: rgba(61, 214, 198, 0.35);
    --text-primary: #eef2f8;
    --text-muted: #8b97ad;
    --gold: #c9a227;
    --gold-light: #e4c65a;
    --cyan: #3dd6c6;
    --cyan-dim: rgba(61, 214, 198, 0.12);
    --shadow-lg: 0 24px 48px rgba(0, 0, 0, 0.45);
    --radius: 14px;
    --font-sans: 'Inter', system-ui, sans-serif;
    --font-display: 'Playfair Display', Georgia, serif;
}

* { box-sizing: border-box; }

body {
    font-family: var(--font-sans);
    background-color: var(--bg-main);
    background-image:
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(61, 214, 198, 0.08), transparent),
        radial-gradient(ellipse 60% 40% at 100% 0%, rgba(201, 162, 39, 0.06), transparent),
        linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-main) 40%, #0a101c 100%);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    margin: 0;
    line-height: 1.6;
}

.navbar {
    background: rgba(7, 11, 18, 0.85) !important;
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-subtle);
    flex-shrink: 0;
    padding: 0.85rem 0;
}

.navbar-brand {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: 0.02em;
    background: linear-gradient(135deg, var(--gold-light), var(--gold));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar-brand .brand-sub {
    display: block;
    font-family: var(--font-sans);
    font-size: 0.62rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    -webkit-text-fill-color: var(--text-muted);
    margin-top: 2px;
}

.nav-link {
    color: var(--text-muted) !important;
    font-weight: 500;
    font-size: 0.9rem;
    transition: color 0.2s ease;
}

.nav-link:hover { color: var(--cyan) !important; }

.navbar-toggler {
    border: 1px solid rgba(61, 214, 198, 0.45);
    background: rgba(61, 214, 198, 0.12);
    padding: 0.35rem 0.55rem;
    min-height: 2.5rem;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.navbar-toggler:focus {
    box-shadow: 0 0 0 0.2rem rgba(61, 214, 198, 0.25);
}

.navbar-toggler-icon {
    width: 1.25rem;
    height: 1.25rem;
    filter: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%23eef2f8' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

.navbar-toggler-text {
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    color: var(--text-primary);
    text-transform: uppercase;
}

.nav-mobile-btn {
    font-size: 0.78rem;
    font-weight: 600;
    padding: 0.35rem 0.65rem;
    white-space: nowrap;
}

.page-main {
    flex: 1 0 auto;
    padding-top: 2rem;
    padding-bottom: 3rem;
}

.page-header h1 {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    background: linear-gradient(135deg, #fff 0%, var(--gold-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-label {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--cyan);
    margin-bottom: 0.75rem;
}

.card {
    background: var(--bg-glass);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    color: var(--text-primary);
}

.card-header {
    background: linear-gradient(135deg, rgba(201, 162, 39, 0.15), rgba(61, 214, 198, 0.08));
    border-bottom: 1px solid var(--border-subtle);
    color: var(--text-primary);
    font-weight: 600;
}

.card-text { color: var(--text-muted); }

.course-card {
    transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
    height: 100%;
}

.course-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-glow);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5), 0 0 0 1px var(--border-glow);
}

.course-card-soon {
    border-color: rgba(201, 162, 39, 0.25);
    opacity: 0.95;
}

.course-card-soon:hover {
    border-color: rgba(201, 162, 39, 0.45);
}

.badge-coming-soon {
    background: rgba(201, 162, 39, 0.2);
    color: var(--gold-light);
    border: 1px solid rgba(201, 162, 39, 0.4);
    font-weight: 600;
}

.catalog-coming-soon {
    border-left: 3px solid var(--gold);
}

.btn-primary {
    background: linear-gradient(135deg, var(--gold) 0%, #a88620 100%);
    border: none;
    color: #0a0e14;
    font-weight: 600;
    border-radius: 8px;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--gold-light) 0%, var(--gold) 100%);
    color: #0a0e14;
    box-shadow: 0 8px 24px rgba(201, 162, 39, 0.35);
}

.btn-success {
    background: linear-gradient(135deg, #2ecc71, #27ae60);
    border: none;
    font-weight: 600;
}

.form-label { color: var(--text-muted); font-size: 0.85rem; font-weight: 500; }

.form-control {
    background: rgba(7, 11, 18, 0.6);
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
    border-radius: 8px;
}

.form-control:focus {
    background: rgba(7, 11, 18, 0.85);
    border-color: var(--cyan);
    color: var(--text-primary);
    box-shadow: 0 0 0 3px var(--cyan-dim);
}

.list-group-item {
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    border-radius: 10px !important;
}

.list-group-item-action:hover {
    background: rgba(61, 214, 198, 0.06);
    border-color: var(--border-glow);
    color: var(--text-primary);
}

.list-group-item h5 a { color: var(--text-primary); text-decoration: none; font-weight: 600; }
.list-group-item h5 a:hover { color: var(--cyan); }

.progress {
    background: rgba(7, 11, 18, 0.8);
    border-radius: 999px;
    height: 10px;
    border: 1px solid var(--border-subtle);
}

.progress-bar {
    background: linear-gradient(90deg, var(--cyan), var(--gold));
}

.badge.bg-secondary {
    background: rgba(139, 151, 173, 0.15) !important;
    color: var(--text-muted) !important;
}

.badge.bg-success {
    background: rgba(46, 204, 113, 0.15) !important;
    color: #5ddea8 !important;
}

.badge.bg-warning {
    background: rgba(201, 162, 39, 0.15) !important;
    color: var(--gold-light) !important;
}

.markdown-body {
    background: rgba(7, 11, 18, 0.5);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    padding: 2rem;
    color: var(--text-primary);
    line-height: 1.75;
}

.markdown-body h1, .markdown-body h2, .markdown-body h3 {
    font-family: var(--font-display);
    color: var(--gold-light);
}

.markdown-body p { color: #c8d0de; }

/* Data tables — lessons, cards, previews (site-wide, not faint cell boxes) */
.table-scroll-wrap {
    overflow-x: auto;
    margin: 1.25rem 0 1.5rem;
    border-radius: var(--radius);
    border: 1px solid rgba(201, 162, 39, 0.35);
}

.page-main table,
.markdown-body table,
.academy-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.25rem 0 1.5rem;
    font-size: 0.92rem;
    border: 1px solid rgba(201, 162, 39, 0.35);
    border-radius: var(--radius);
    overflow: hidden;
}

.table-scroll-wrap table {
    margin: 0;
    border: none;
    border-radius: 0;
    min-width: 36rem;
}

.page-main table thead th,
.markdown-body table thead th,
.academy-table thead th {
    background: rgba(201, 162, 39, 0.16);
    color: var(--gold-light);
    font-weight: 600;
    text-align: left;
    padding: 0.7rem 0.9rem;
    border-bottom: 2px solid rgba(201, 162, 39, 0.45);
    border-right: 1px solid rgba(201, 162, 39, 0.25);
}

.page-main table thead th:last-child,
.markdown-body table thead th:last-child,
.academy-table thead th:last-child {
    border-right: none;
}

.page-main table tbody td,
.page-main table tbody th,
.markdown-body table tbody td,
.markdown-body table tbody th,
.academy-table tbody td,
.academy-table tbody th {
    padding: 0.65rem 0.9rem;
    vertical-align: top;
    color: #c8d0de;
    border-bottom: 1px solid rgba(201, 162, 39, 0.28);
    border-right: 1px solid rgba(201, 162, 39, 0.22);
    background: rgba(7, 11, 18, 0.35);
}

.page-main table tbody tr:last-child td,
.page-main table tbody tr:last-child th,
.markdown-body table tbody tr:last-child td,
.markdown-body table tbody tr:last-child th,
.academy-table tbody tr:last-child td,
.academy-table tbody tr:last-child th {
    border-bottom: none;
}

.page-main table tbody td:last-child,
.page-main table tbody th:last-child,
.markdown-body table tbody td:last-child,
.markdown-body table tbody th:last-child,
.academy-table tbody td:last-child,
.academy-table tbody th:last-child {
    border-right: none;
}

.page-main table tbody tr:nth-child(even) td,
.page-main table tbody tr:nth-child(even) th,
.markdown-body table tbody tr:nth-child(even) td,
.markdown-body table tbody tr:nth-child(even) th,
.academy-table tbody tr:nth-child(even) td,
.academy-table tbody tr:nth-child(even) th {
    background: rgba(255, 255, 255, 0.03);
}

.page-main table tbody tr:hover td,
.page-main table tbody tr:hover th,
.markdown-body table tbody tr:hover td,
.markdown-body table tbody tr:hover th,
.academy-table tbody tr:hover td,
.academy-table tbody tr:hover th {
    background: rgba(61, 214, 198, 0.06);
}

.page-main table strong,
.markdown-body table strong,
.academy-table strong {
    color: var(--text-primary);
}

/* Lesson callout boxes — labs (cyan), job tips (gold), practice (green) */
.markdown-body .lab-box,
.markdown-body .job-box,
.markdown-body .practice-box {
    border-radius: 10px;
    padding: 1.25rem 1.5rem;
    margin: 1.5rem 0;
    border: 1px solid var(--border-subtle);
}

.markdown-body .lab-box {
    background: rgba(0, 180, 200, 0.08);
    border-left: 4px solid var(--cyan);
}

.markdown-body .job-box {
    background: rgba(201, 162, 39, 0.08);
    border-left: 4px solid var(--gold);
}

.markdown-body .practice-box {
    background: rgba(46, 204, 113, 0.06);
    border-left: 4px solid #2ecc71;
}

.markdown-body .lab-box h3,
.markdown-body .job-box h3,
.markdown-body .practice-box h3 {
    font-size: 1.1rem;
    margin-top: 0;
}

#ai-chat-history {
    background: rgba(7, 11, 18, 0.6) !important;
    border: 1px solid var(--border-subtle) !important;
    border-radius: 10px !important;
    color: var(--text-muted);
    max-height: 300px;
    overflow-y: auto;
    padding: 10px;
}

.auth-wrap { max-width: 440px; margin: 2rem auto 4rem; }

.footer {
    width: 100%;
    padding: 1.25rem 0;
    margin-top: auto;
    text-align: center;
    background: rgba(7, 11, 18, 0.9);
    border-top: 1px solid var(--border-subtle);
    color: var(--text-muted);
    font-size: 0.8rem;
    flex-shrink: 0;
}

.alert-danger {
    background: rgba(220, 53, 69, 0.12);
    border-color: rgba(220, 53, 69, 0.35);
    color: #f5a5ad;
}

.text-muted { color: var(--text-muted) !important; }
hr { border-color: var(--border-subtle); opacity: 1; }
a { color: var(--cyan); }
a:hover { color: var(--gold-light); }
h1, h2, h3, h4, h5, h6 { color: var(--text-primary); }

.hero-welcome { text-align: center; padding: 1rem 0 2.5rem; }
.hero-welcome h2 { font-family: var(--font-display); font-size: clamp(1.5rem, 3vw, 2rem); }
.hero-welcome p { color: var(--text-muted); }

.tutor-panel .card-header h3 {
    font-family: var(--font-display);
    font-size: 1.15rem;
    margin: 0;
}

/* The Librarian — home entry */
.librarian-panel {
    border-color: var(--border-glow);
    box-shadow: 0 0 24px rgba(61, 214, 198, 0.08);
}

.librarian-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    color: var(--gold-light);
}

.librarian-chat {
    max-height: 220px;
    overflow-y: auto;
    padding: 0.5rem;
    background: rgba(7, 11, 18, 0.5);
    border-radius: var(--radius);
    border: 1px solid var(--border-subtle);
}

.librarian-msg {
    padding: 0.5rem 0.75rem;
    margin-bottom: 0.5rem;
    border-radius: 10px;
    font-size: 0.92rem;
    line-height: 1.5;
}

.librarian-user {
    background: var(--cyan-dim);
    border: 1px solid var(--border-glow);
    margin-left: 2rem;
    text-align: right;
}

.librarian-bot {
    background: rgba(201, 162, 39, 0.08);
    border: 1px solid var(--border-subtle);
    margin-right: 1rem;
}

.librarian-actions .btn { font-size: 0.85rem; }

/* Floating Alexandria Assistant (Librarian + Alexis) */
.aa-root { position: fixed; z-index: 1050; bottom: 1.25rem; right: 1.25rem; }

.aa-fab {
    width: 3.25rem;
    height: 3.25rem;
    border-radius: 50%;
    border: 1px solid var(--border-glow);
    background: linear-gradient(145deg, rgba(61, 214, 198, 0.25), rgba(201, 162, 39, 0.2));
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    font-size: 1.35rem;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.aa-fab:hover { transform: scale(1.06); }
.aa-fab.aa-hidden { opacity: 0; pointer-events: none; transform: scale(0.8); }

.aa-panel {
    display: none;
    width: min(380px, calc(100vw - 2rem));
    max-height: min(520px, calc(100vh - 6rem));
    flex-direction: column;
    background: var(--bg-glass);
    backdrop-filter: blur(14px);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.aa-panel.aa-open { display: flex; }

.aa-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--border-subtle);
}

.aa-title {
    font-family: var(--font-display);
    font-size: 1.1rem;
    color: var(--gold-light);
}

.aa-tabs {
    display: flex;
    gap: 0.35rem;
    padding: 0.5rem 0.75rem 0;
    flex-wrap: wrap;
}

.aa-tab {
    flex: 1;
    min-width: 0;
    font-size: 0.72rem;
    padding: 0.35rem 0.5rem;
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
}

.aa-tab.active {
    border-color: var(--border-glow);
    color: var(--cyan);
    background: var(--cyan-dim);
}

.aa-hint { padding: 0.5rem 1rem 0; margin: 0; }

.aa-chat {
    flex: 1;
    overflow-y: auto;
    padding: 0.75rem 1rem;
    min-height: 120px;
    max-height: 260px;
}

.aa-msg {
    padding: 0.5rem 0.7rem;
    margin-bottom: 0.45rem;
    border-radius: 10px;
    font-size: 0.88rem;
    line-height: 1.45;
}

.aa-user {
    background: var(--cyan-dim);
    border: 1px solid var(--border-glow);
    margin-left: 1.5rem;
    text-align: right;
}

.aa-bot {
    background: rgba(201, 162, 39, 0.08);
    border: 1px solid var(--border-subtle);
    margin-right: 0.5rem;
}

.aa-thinking { opacity: 0.7; font-style: italic; }

.aa-actions { padding: 0 1rem 0.5rem; }

.aa-input-row { padding: 0 0.75rem 0.5rem; }

.aa-footer-note { padding: 0 1rem 0.75rem; }

@media (min-width: 992px) {
    body.aa-lesson-page .page-main { padding-right: 1rem; }
}

/* Learning path — step progression */
.breadcrumb-nav a { color: var(--cyan); text-decoration: none; }
.breadcrumb-nav a:hover { color: var(--gold-light); }

.step-number {
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--cyan);
}

.path-step.step-done {
    border-color: rgba(46, 204, 113, 0.35);
}

.path-step.step-active {
    border-color: var(--border-glow);
    box-shadow: 0 0 0 1px var(--border-glow);
}

.path-step.step-locked {
    opacity: 0.65;
    border-style: dashed;
}

.lesson-path .path-step { margin-left: 0; }

.lesson-footer {
    border-color: var(--gold);
    background: linear-gradient(135deg, rgba(201, 162, 39, 0.08), transparent);
}

.btn-outline-accent {
    border: 1px solid var(--cyan);
    color: var(--cyan);
    background: transparent;
    font-weight: 600;
    border-radius: 8px;
    padding: 0.55rem 1.35rem;
}

.btn-outline-accent:hover {
    background: var(--cyan-dim);
    color: var(--cyan);
}

a.btn.disabled { pointer-events: none; opacity: 0.5; }

/* =============================================================================
   Responsive layout — phone, tablet, laptop, desktop
   Breakpoints: 575 (phone), 768 (tablet), 992 (laptop), 1200 (wide)
   ============================================================================= */

html {
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

.page-main.container {
    padding-left: max(1rem, env(safe-area-inset-left, 0px));
    padding-right: max(1rem, env(safe-area-inset-right, 0px));
}

/* Readable line length on large monitors */
@media (min-width: 1200px) {
    .page-main.container {
        max-width: 1140px;
    }

    .markdown-body {
        max-width: 52rem;
    }
}

/* Laptop — comfortable reading, assistant stays corner dock */
@media (min-width: 992px) and (max-width: 1199px) {
    .page-main {
        padding-top: 1.75rem;
        padding-bottom: 2.5rem;
    }
}

/* Tablet */
@media (max-width: 991px) {
    .page-main {
        padding-top: 1.5rem;
        padding-bottom: 2rem;
    }

    .navbar .container-fluid {
        flex-wrap: wrap;
        align-items: center;
    }

    .navbar-collapse {
        flex-basis: 100%;
        margin-top: 0.65rem;
        padding: 0.65rem 0.85rem 0.85rem;
        background: rgba(10, 16, 28, 0.98);
        border: 1px solid var(--border-subtle);
        border-radius: var(--radius);
    }

    .navbar-collapse .nav-link {
        color: var(--text-primary) !important;
        padding: 0.65rem 0.5rem !important;
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }

    .navbar-collapse .nav-item:last-child .nav-link {
        border-bottom: none;
    }

    .navbar-brand {
        font-size: 1.1rem;
        max-width: calc(100% - 11rem);
    }

    .course-card:hover {
        transform: none;
    }

    .markdown-body {
        padding: 1.35rem 1.25rem;
    }

    .table-scroll-wrap table {
        min-width: 32rem;
    }

    .lesson-footer .card-body {
        flex-direction: column;
        align-items: stretch !important;
        text-align: center;
    }

    .lesson-footer .btn,
    #continue-banner .btn,
    #quiz-step .btn {
        width: 100%;
    }
}

/* Phone */
@media (max-width: 575px) {
    .page-main {
        padding-top: 1rem;
        padding-bottom: 1.75rem;
    }

    .navbar {
        padding: 0.65rem 0;
    }

    .navbar-brand {
        font-size: 0.95rem;
        line-height: 1.2;
    }

    .navbar-brand .brand-sub {
        font-size: 0.52rem;
        letter-spacing: 0.14em;
    }

    .nav-link {
        font-size: 1rem;
        padding: 0.55rem 0.75rem !important;
    }

    .hero-welcome {
        padding: 0.5rem 0 1.5rem;
    }

    .page-header h1 {
        font-size: clamp(1.45rem, 7vw, 1.85rem);
    }

    .page-header .lead,
    .hero-welcome p {
        font-size: 0.95rem;
    }

    .markdown-body {
        padding: 1rem 0.85rem;
        font-size: 0.95rem;
        line-height: 1.65;
    }

    .markdown-body h2 { font-size: 1.25rem; }
    .markdown-body h3 { font-size: 1.1rem; }

    .markdown-body .lab-box,
    .markdown-body .job-box,
    .markdown-body .practice-box {
        padding: 1rem 0.9rem;
        margin: 1rem 0;
    }

    .page-main table,
    .markdown-body table,
    .academy-table {
        font-size: 0.82rem;
    }

    .page-main table thead th,
    .markdown-body table thead th,
    .academy-table thead th,
    .page-main table tbody td,
    .markdown-body table tbody td,
    .academy-table tbody td {
        padding: 0.5rem 0.6rem;
    }

    .table-scroll-wrap {
        margin: 1rem 0 1.25rem;
    }

    .table-scroll-wrap table {
        min-width: 28rem;
    }

    .table-scroll-wrap::after {
        content: "Swipe sideways for more columns →";
        display: block;
        font-size: 0.7rem;
        color: var(--text-muted);
        text-align: center;
        padding: 0.35rem 0.5rem 0.5rem;
        letter-spacing: 0.04em;
    }

    .breadcrumb-nav {
        word-break: break-word;
        line-height: 1.5;
    }

    .btn-primary,
    .btn-success,
    .btn-outline-accent,
    #quizForm button[type="submit"],
    .auth-wrap .btn-primary {
        width: 100%;
        min-height: 2.75rem;
    }

    .d-flex.justify-content-between.align-items-center.mb-3 {
        flex-direction: column;
        align-items: stretch !important;
        gap: 0.65rem;
    }

    #mark-complete-btn {
        width: 100%;
    }

    .auth-wrap,
    .page-main > .container.mt-5 {
        margin-top: 1rem !important;
    }

    .card-body {
        padding: 1rem;
    }

    .footer {
        font-size: 0.72rem;
        padding: 1rem max(1rem, env(safe-area-inset-left, 0px));
    }
}

/* Code blocks — scroll on narrow screens instead of breaking layout */
.markdown-body pre,
.markdown-body code {
    word-break: break-word;
}

.markdown-body pre {
    overflow-x: auto;
    padding: 0.85rem 1rem;
    border-radius: 8px;
    border: 1px solid var(--border-subtle);
    background: rgba(7, 11, 18, 0.85);
    font-size: 0.82rem;
    -webkit-overflow-scrolling: touch;
}

.markdown-body :not(pre) > code {
    padding: 0.12rem 0.35rem;
    border-radius: 4px;
    background: rgba(7, 11, 18, 0.7);
    font-size: 0.88em;
}

/* Touch devices — bigger tap targets, no iOS input zoom */
@media (hover: none) and (pointer: coarse) {
    .form-control,
    .form-select {
        font-size: 16px;
        min-height: 2.75rem;
    }

    .aa-fab {
        width: 3.5rem;
        height: 3.5rem;
    }

    .aa-tab,
    .aa-send,
    #aa-send {
        min-height: 2.5rem;
    }

    .list-group-item-action {
        min-height: 2.75rem;
    }
}

/* Assistant — full-width bottom sheet on phones; corner panel on larger screens */
@media (max-width: 767px) {
    .aa-root {
        left: 0;
        right: 0;
        bottom: 0;
        padding: 0 max(0.5rem, env(safe-area-inset-right, 0px))
                 max(0.5rem, env(safe-area-inset-bottom, 0px))
                 max(0.5rem, env(safe-area-inset-left, 0px));
    }

    .aa-fab {
        position: fixed;
        right: max(1rem, env(safe-area-inset-right, 0px));
        bottom: max(1rem, env(safe-area-inset-bottom, 0px));
    }

    .aa-panel {
        width: 100%;
        max-height: min(88vh, calc(100dvh - 5rem));
        border-radius: var(--radius) var(--radius) 0 0;
    }

    .aa-panel.aa-open {
        box-shadow: 0 -12px 40px rgba(0, 0, 0, 0.55);
    }

    .aa-chat {
        max-height: min(42vh, 320px);
    }

    .aa-input-row .form-control {
        font-size: 16px;
    }

    .aa-input-row .btn {
        min-width: 4.5rem;
    }
}

@media (min-width: 768px) and (max-width: 991px) {
    .aa-panel {
        width: min(420px, calc(100vw - 2rem));
        max-height: min(560px, calc(100vh - 5rem));
    }
}