/* ================================================================================
   BIBLE INSTITUTE LMS - ADMIN DASHBOARD THEME
   ================================================================================
   
   Design Philosophy: "Calm Tech"
   - Midnight Scholar (Dark Mode): Deep focus for long administrative sessions
   - Lumina Soft (Light Mode): Airy, professional "Paper" feel
   
   Technology Stack: Bootstrap 5 + Alpine.js + HTMX
   ================================================================================ */

/* ================================
   1. CSS CUSTOM PROPERTIES
   ================================ */
:root {
    /* ===== Light Mode Colors (Lumina Soft) ===== */
    --admin-bg-primary: #F4F8FC;            /* Soft academic blue */
    --admin-bg-surface: #FFFFFF;            /* Pure White Cards */
    --admin-bg-sidebar: #1F3A4A;            /* Deep blue-gray sidebar */
    --admin-bg-elevated: #EAF2F8;           /* Slightly elevated surfaces */
    
    --admin-accent-primary: #2F5D73;        /* Calm academic blue */
    --admin-accent-secondary: #6F8FA3;      /* Muted blue-gray */
    --admin-accent-hover: #24495B;          /* Darker blue */
    
    --admin-text-primary: #1E293B;          /* Slate ink */
    --admin-text-secondary: #5F6F7E;        /* Blue-gray */
    --admin-text-muted: #7C8C99;            /* Muted blue-gray */
    --admin-text-on-dark: #FFFFFF;          /* White text on dark backgrounds */
    
    --admin-border: #D6E2EA;
    --admin-border-light: #E4ECF2;
    --admin-border-strong: #AFC3D0;
    
    /* ===== Semantic Colors ===== */
    --admin-success: #28a745;
    --admin-danger: #dc3545;
    --admin-warning: #ffc107;
    --admin-info: #17a2b8;
    
    /* ===== Spacing ===== */
    --admin-sidebar-width: 280px;
    --admin-sidebar-collapsed: 80px;
    --admin-header-height: 60px;
    --admin-spacing-xs: 0.25rem;
    --admin-spacing-sm: 0.5rem;
    --admin-spacing-md: 1rem;
    --admin-spacing-lg: 1.5rem;
    --admin-spacing-xl: 2rem;
    
    /* ===== Transitions ===== */
    --transition-base: 0.18s ease;
    --transition-fast: 0.12s ease;
    --transition-slow: 0.28s ease;
    
    /* ===== Shadows ===== */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.15);
    
    /* ===== Border Radius ===== */
    --radius-xs: 0.25rem;
    --radius-sm: 0.625rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;
    
    /* ===== Z-Index Scale ===== */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* ===== Dark Mode (Midnight Scholar) ===== */
[data-bs-theme="dark"] {
    --admin-bg-primary: #12141D;            /* Deep Ink Background */
    --admin-bg-surface: #1B1F2D;            /* Navy Charcoal Cards */
    --admin-bg-sidebar: #0F111A;            /* Sidebar Base */
    --admin-bg-elevated: #232838;           /* Elevated surfaces */
    
    --admin-accent-primary: #7C4DFF;        /* Electric Lavender */
    --admin-accent-secondary: #00D4FF;      /* Sky Cyan */
    --admin-accent-hover: #9575FF;          /* Lighter Lavender */
    
    --admin-text-primary: #E0E6ED;          /* Soft Silver */
    --admin-text-secondary: #9CA3AF;        /* Gray */
    --admin-text-muted: #6B7280;            /* Darker Gray */
    --admin-text-on-dark: #FFFFFF;          /* White */
    
    --admin-border: rgba(124, 77, 255, 0.2);
    --admin-border-light: rgba(255, 255, 255, 0.05);
    --admin-border-strong: rgba(124, 77, 255, 0.4);
    
    /* Adjust semantic colors for dark mode */
    --admin-success: #00D4FF;
    --admin-danger: #ff5370;
    --admin-warning: #ffcb6b;
    --admin-info: #89ddff;
    
    /* Adjust shadows for dark mode */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.6);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.7);
}

/* ================================
   DARK MODE UTILITY OVERRIDES
   ================================ */

/* bg-light / bg-white look harsh in dark mode */
[data-bs-theme="dark"] .bg-light {
    background-color: var(--admin-bg-elevated) !important;
    color: var(--admin-text-primary) !important;
}
[data-bs-theme="dark"] .bg-white {
    background-color: var(--admin-bg-surface) !important;
    color: var(--admin-text-primary) !important;
}

/* Quiz answer surfaces need stronger dark-mode overrides than Bootstrap defaults */
[data-bs-theme="dark"] .question-card .bg-light,
[data-bs-theme="dark"] .question-card .form-control.bg-light,
[data-bs-theme="dark"] .question-card .form-select.bg-light {
    background-color: var(--admin-bg-elevated) !important;
    border-color: var(--admin-border) !important;
    color: var(--admin-text-primary) !important;
}

[data-bs-theme="dark"] .question-card .correct-answer-section .card.bg-light,
[data-bs-theme="dark"] .question-card .correct-answer-section .card.bg-warning,
[data-bs-theme="dark"] .question-card .correct-answer-section .card.bg-info {
    background-color: var(--admin-bg-elevated) !important;
    border-color: var(--admin-border) !important;
    color: var(--admin-text-primary) !important;
}

[data-bs-theme="dark"] .question-card .correct-answer-section .card.bg-warning.bg-opacity-10,
[data-bs-theme="dark"] .question-card .correct-answer-section .card.bg-info.bg-opacity-10 {
    background-color: var(--admin-bg-elevated) !important;
}

[data-bs-theme="dark"] .question-card .bg-light * {
    color: inherit;
}

.quiz-closed-banner {
    background: #f1f3f1;
    border: 1.5px solid #A5A58D;
    border-radius: 0.75rem;
}

.quiz-closed-banner__icon {
    color: #6B705C;
}

[data-bs-theme="dark"] .quiz-closed-banner {
    background: var(--admin-bg-elevated);
    border-color: var(--admin-border-strong);
    color: var(--admin-text-primary);
}

[data-bs-theme="dark"] .quiz-closed-banner__icon {
    color: var(--admin-accent-secondary);
}

/* Keep quiz answer blocks full width so options do not collapse to content width */
.question-card .answers-section,
.question-card .mcq-choices,
.question-card [data-choice-list],
.question-card [data-structured-list],
.question-card [data-order-item-list],
.question-card [data-order-item-row],
.question-card [data-match-item-row],
.question-card [data-structured-row],
.question-card [data-choice-row] {
    width: 100%;
}

.question-card .answers-section .form-check {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    width: 100%;
}

.question-card .answers-section .form-check-label {
    display: block;
    flex: 1 1 auto;
    width: 100%;
}

.question-card .answers-section .form-control,
.question-card .answers-section .form-select,
.question-card .answers-section textarea,
.question-card .answers-section input[type="text"],
.question-card .answers-section input[type="number"] {
    width: 100%;
}

/* btn-light dark mode fix */
[data-bs-theme="dark"] .btn-light {
    background-color: var(--admin-bg-elevated);
    color: var(--admin-text-primary);
    border-color: var(--admin-border-strong);
}
[data-bs-theme="dark"] .btn-light:hover,
[data-bs-theme="dark"] .btn-light:focus {
    background-color: var(--admin-bg-primary);
    color: var(--admin-text-primary);
    border-color: var(--admin-border-strong);
}

/* Checkbox visibility in dark dropdown menus */
[data-bs-theme="dark"] .dropdown-menu .form-check-input {
    background-color: var(--admin-bg-elevated);
    border-color: var(--admin-border-strong);
}
[data-bs-theme="dark"] .dropdown-menu .form-check-input:checked {
    background-color: var(--admin-accent-primary);
    border-color: var(--admin-accent-primary);
}

/* ================================
   2. GLOBAL STYLES
   ================================ */
body {
    background: var(--admin-bg-primary);
    color: var(--admin-text-primary);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    min-height: 100vh;
    font-size: 14px;
    line-height: 1.5;
}

/* Smooth transitions for theme switching */
body,
.card,
.btn,
.nav-link,
.table,
.form-control,
.form-select,
.modal-content,
.dropdown-menu {
    transition: background-color var(--transition-base), 
                color var(--transition-base), 
                border-color var(--transition-base),
                box-shadow var(--transition-base);
}

/* Prevent flash of unstyled content */
.admin-layout {
    opacity: 0;
    animation: fadeInLayout 0.3s ease forwards;
    animation-delay: 0.1s;
}

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

/* ================================
   3. LAYOUT
   ================================ */
.admin-layout {
    display: flex;
    min-height: 100vh;
}

/* ===== Sidebar ===== */
.admin-sidebar {
    width: var(--admin-sidebar-width);
    background: var(--admin-bg-sidebar);
    transition: width var(--transition-base), transform var(--transition-base);
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: var(--z-fixed);
    box-shadow: var(--shadow-lg);
    overflow-y: auto;
    overflow-x: hidden;
}

.admin-sidebar.sidebar-collapsed {
    width: var(--admin-sidebar-collapsed);
}

.admin-sidebar::-webkit-scrollbar {
    width: 6px;
}

.admin-sidebar::-webkit-scrollbar-track {
    background: transparent;
}

.admin-sidebar::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
}

.admin-sidebar::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* ===== Main Content ===== */
.admin-main-content {
    flex: 1;
    min-width: 0;
    margin-left: var(--admin-sidebar-width);
    padding: var(--admin-spacing-xl);
    background: var(--admin-bg-primary);
    transition: margin-left var(--transition-base);
    min-height: 100vh;
}

.sidebar-collapsed ~ .admin-main-content {
    margin-left: var(--admin-sidebar-collapsed);
}

/* ================================
   4. SIDEBAR COMPONENTS
   ================================ */
.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--admin-spacing-lg) var(--admin-spacing-md);
    border-bottom: 1px solid var(--admin-border-light);
    min-height: var(--admin-header-height);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--admin-text-on-dark);
    text-decoration: none;
    font-size: 1.25rem;
    font-weight: 600;
    transition: opacity var(--transition-base);
    white-space: nowrap;
    overflow: hidden;
}

.sidebar-brand:hover {
    opacity: 0.8;
    color: var(--admin-text-on-dark);
}

.sidebar-brand i {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.sidebar-collapsed .sidebar-brand span {
    opacity: 0;
    width: 0;
}

.btn-sidebar-toggle {
    background: transparent;
    border: none;
    color: var(--admin-text-on-dark);
    padding: 0.5rem;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-base);
}

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

/* ===== Navigation ===== */
.sidebar-nav {
    padding: var(--admin-spacing-md) var(--admin-spacing-sm);
    overflow-y: auto;
    flex: 1;
}

.sidebar-nav .nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem var(--admin-spacing-md);
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    border-radius: var(--radius-md);
    margin-bottom: var(--admin-spacing-xs);
    transition: all var(--transition-base);
    white-space: nowrap;
    overflow: hidden;
    font-size: 0.9375rem;
}

.sidebar-nav .nav-link i {
    font-size: 1.25rem;
    width: 1.5rem;
    text-align: center;
    flex-shrink: 0;
}

.sidebar-nav .nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--admin-text-on-dark);
    transform: translateX(3px);
}

.sidebar-nav .nav-link.active {
    background: var(--admin-accent-primary);
    color: var(--admin-text-on-dark);
}

[data-bs-theme="dark"] .sidebar-nav .nav-link.active {
    background: var(--admin-accent-primary);
    box-shadow: 0 0 20px rgba(124, 77, 255, 0.3);
}

.sidebar-collapsed .sidebar-nav .nav-link span {
    opacity: 0;
    width: 0;
}

.sidebar-collapsed .sidebar-nav .nav-link:hover {
    transform: translateX(0);
}

/* ===== Sidebar Footer ===== */
.sidebar-footer {
    padding: var(--admin-spacing-md);
    border-top: 1px solid var(--admin-border-light);
}

.btn-theme-toggle {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--admin-text-on-dark);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.btn-theme-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    color: var(--admin-text-on-dark);
}

.sidebar-collapsed .btn-theme-toggle span {
    opacity: 0;
    width: 0;
}

/* ================================
   5. CARDS & SURFACES
   ================================ */
.card,
.admin-card {
    background: var(--admin-bg-surface);
    border: 1px solid var(--admin-border-light);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-base), transform var(--transition-base);
    margin-bottom: var(--admin-spacing-md);
}

.card:hover,
.admin-card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    background: transparent;
    border-bottom: 1px solid var(--admin-border-light);
    padding: var(--admin-spacing-md) var(--admin-spacing-lg);
    font-weight: 600;
    color: var(--admin-text-primary);
}

.card-body {
    padding: var(--admin-spacing-lg);
    color: var(--admin-text-primary);
}

.card-footer {
    background: var(--admin-bg-elevated);
    border-top: 1px solid var(--admin-border-light);
    padding: var(--admin-spacing-md) var(--admin-spacing-lg);
}

/* ================================
   6. BUTTONS
   ================================ */
.btn {
    border-radius: var(--radius-md);
    font-weight: 500;
    transition: all var(--transition-base);
    padding: 0.5rem 1rem;
}

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

.btn-primary:hover {
    background: var(--admin-accent-hover);
    border-color: var(--admin-accent-hover);
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

[data-bs-theme="dark"] .btn-primary {
    background: var(--admin-accent-primary);
    border-color: var(--admin-accent-primary);
}

[data-bs-theme="dark"] .btn-primary:hover {
    background: var(--admin-accent-hover);
    border-color: var(--admin-accent-hover);
    box-shadow: 0 4px 12px rgba(124, 77, 255, 0.4);
}

.btn-outline-primary {
    color: var(--admin-accent-primary);
    border-color: var(--admin-accent-primary);
}

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

/* ================================
   7. TABLES
   ================================ */

.bulk-actions {
    display: flex;
    align-items: center;
    gap: var(--admin-spacing-sm);
}

.bulk-count {
    font-weight: 600;
    color: var(--admin-accent-primary);
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.column-controls {
    display: flex;
    gap: var(--admin-spacing-sm);
}

.column-menu {
    min-width: 200px;
    max-height: 400px;
    overflow-y: auto;
}

.column-menu .form-check {
    padding: 0.5rem 1rem;
    margin: 0;
}

.column-menu .form-check:hover {
    background: var(--admin-bg-elevated);
}

/* ===== Column Types ===== */
.column-checkbox {
    width: 40px;
    text-align: center;
}

.column-actions {
    width: auto;
    min-width: 150px;
    white-space: nowrap;
}

/* ===== Sortable Columns ===== */
.sortable-column {
    cursor: pointer;
    user-select: none;
    transition: background-color var(--transition-fast);
}

.sortable-column:hover {
    background: var(--admin-border-light);
}

.sortable-column i {
    opacity: 0.3;
    transition: opacity var(--transition-fast);
}

.sortable-column:hover i {
    opacity: 0.7;
}

.page-info {
    color: var(--admin-text-secondary);
    font-size: 0.875rem;
}

.table-responsive {
    border-radius: var(--radius-lg);
    overflow-x: auto;
}

/* ================================
   8. FORMS
   ================================ */

/* ===== Form Page Layout ===== */
.admin-form-page {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--admin-spacing-lg);
}

.form-back-nav {
    margin-bottom: var(--admin-spacing-lg);
}

.form-container {
    width: 100%;
}

/* ===== Auto-save Indicator ===== */
.auto-save-indicator {
    position: fixed;
    bottom: var(--admin-spacing-lg);
    right: var(--admin-spacing-lg);
    z-index: var(--z-fixed);
    max-width: 300px;
}

.auto-save-indicator .alert {
    margin-bottom: 0;
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(10px);
}

/* ===== Form Structure ===== */
.admin-form {
    display: flex;
    flex-direction: column;
    gap: var(--admin-spacing-lg);
}

.form-fields {
    display: flex;
    flex-direction: column;
    gap: var(--admin-spacing-md);
}

.form-actions {
    display: flex;
    gap: var(--admin-spacing-md);
    padding-top: var(--admin-spacing-lg);
    border-top: 1px solid var(--admin-border-light);
}

.form-actions .btn {
    flex: 1;
    max-width: 200px;
}

.form-actions .btn:first-child {
    flex: 2;
    max-width: none;
}

/* ===== Form Controls ===== */
.form-control,
.form-select {
    background: var(--admin-bg-surface);
    border: 1px solid var(--admin-border);
    color: var(--admin-text-primary);
    border-radius: var(--radius-sm);
    padding: 0.625rem 0.875rem;
    transition: all var(--transition-base);
    font-size: 0.9375rem;
}

.form-control:focus,
.form-select:focus {
    background: var(--admin-bg-surface);
    border-color: var(--admin-accent-primary);
    box-shadow: 0 0 0 0.2rem rgba(107, 112, 92, 0.15);
    color: var(--admin-text-primary);
    outline: none;
}

.form-control:disabled,
.form-select:disabled {
    background: var(--admin-bg-elevated);
    opacity: 0.6;
    cursor: not-allowed;
}

.form-control::placeholder {
    color: var(--admin-text-muted);
}

/* ===== Form Labels ===== */
.form-label {
    color: var(--admin-text-primary);
    font-weight: 600;
    margin-bottom: var(--admin-spacing-sm);
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.form-label .required-indicator {
    color: var(--admin-danger);
}

.form-text {
    color: var(--admin-text-muted);
    font-size: 0.8125rem;
    margin-top: var(--admin-spacing-xs);
}

/* ===== Form Validation ===== */
.was-validated .form-control:valid,
.form-control.is-valid {
    border-color: var(--admin-success);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'%3e%3cpath fill='%2328a745' d='M2.3 6.73L.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
    padding-right: calc(1.5em + 0.75rem);
}

.was-validated .form-control:invalid,
.form-control.is-invalid {
    border-color: var(--admin-danger);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' width='12' height='12' fill='none' stroke='%23dc3545'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/%3e%3ccircle cx='6' cy='8.2' r='.6' fill='%23dc3545' stroke='none'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
    padding-right: calc(1.5em + 0.75rem);
}

.invalid-feedback {
    display: block;
    margin-top: var(--admin-spacing-xs);
    font-size: 0.8125rem;
    color: var(--admin-danger);
}

/* ===== Form Groups ===== */
.form-group {
    margin-bottom: var(--admin-spacing-md);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--admin-spacing-md);
}

/* ===== Checkboxes & Radios ===== */
.form-check {
    padding-left: 1.5em;
    margin-bottom: var(--admin-spacing-sm);
}

.form-check-input {
    border-color: var(--admin-border);
    background-color: var(--admin-bg-surface);
    width: 1.125em;
    height: 1.125em;
    margin-top: 0.125em;
}

.form-check-input:checked {
    background-color: var(--admin-accent-primary);
    border-color: var(--admin-accent-primary);
}

.form-check-input:focus {
    border-color: var(--admin-accent-primary);
    box-shadow: 0 0 0 0.2rem rgba(107, 112, 92, 0.15);
}

.form-check-label {
    color: var(--admin-text-primary);
    font-size: 0.9375rem;
}

/* ===== Dark Mode Adjustments ===== */
[data-bs-theme="dark"] .form-control,
[data-bs-theme="dark"] .form-select {
    background: var(--admin-bg-surface);
    border-color: var(--admin-border);
    color: var(--admin-text-primary);
}

[data-bs-theme="dark"] .form-control:focus,
[data-bs-theme="dark"] .form-select:focus {
    border-color: var(--admin-accent-primary);
    box-shadow: 0 0 0 0.2rem rgba(124, 77, 255, 0.25);
}

[data-bs-theme="dark"] .form-control:disabled,
[data-bs-theme="dark"] .form-select:disabled {
    background: rgba(255, 255, 255, 0.05);
}

[data-bs-theme="dark"] .form-check-input {
    background-color: var(--admin-bg-surface);
    border-color: var(--admin-border);
}

[data-bs-theme="dark"] .form-check-input:checked {
    background-color: var(--admin-accent-primary);
    border-color: var(--admin-accent-primary);
}

.was-validated .form-control:invalid,
.form-control.is-invalid {
    border-color: var(--admin-danger);
}

/* ===== Lesson Form - Video Container ===== */
.video-container {
    position: relative;
    background: var(--admin-bg-surface);
    border: 1px solid var(--admin-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.video-container:hover {
    border-color: var(--admin-accent-primary);
    box-shadow: var(--shadow-sm);
}

.video-container .card-body {
    position: relative;
}

/* Fix text contrast for file names */
.video-container .fw-bold {
    color: var(--admin-text-primary) !important;
    font-size: 0.9375rem;
}

/* Ensure good contrast for card footer */
.video-container .card-footer {
    background: var(--admin-bg-elevated);
    border-top: 1px solid var(--admin-border-light);
}

/* Dark mode specific adjustments */
[data-bs-theme="dark"] .video-container {
    background: var(--admin-bg-surface);
    border-color: var(--admin-border);
}

[data-bs-theme="dark"] .video-container .fw-bold {
    color: var(--admin-text-primary) !important;
}

[data-bs-theme="dark"] .video-container .card-footer {
    background: var(--admin-bg-sidebar);
    border-top-color: var(--admin-border-light);
}

[data-bs-theme="dark"] .video-container .btn-outline-secondary {
    color: var(--admin-text-secondary);
    border-color: var(--admin-border);
}

[data-bs-theme="dark"] .video-container .btn-outline-secondary:hover {
    color: var(--admin-text-primary);
    background: var(--admin-bg-elevated);
    border-color: var(--admin-accent-primary);
}

/* ================================
   9. DASHBOARD COMPONENTS
   ================================ */
.filter-item {
    min-width: 200px;
}

.filter-item .form-control,
.filter-item .form-select {
    min-width: 200px;
}

/* ===== Table Loading Indicator ===== */
.table-loading {
    display: none;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: var(--z-modal);
}

.table-loading.htmx-request {
    display: flex;
}

.table-section {
    position: relative;
    min-height: 200px;
}

/* ================================
   10. MOBILE MENU
   ================================ */
.mobile-menu-toggle {
    position: fixed;
    bottom: var(--admin-spacing-lg);
    right: var(--admin-spacing-lg);
    z-index: calc(var(--z-fixed) - 1);
    border-radius: var(--radius-full);
    width: 56px;
    height: 56px;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ================================
   11. RESPONSIVE DESIGN
   ================================ */
@media (max-width: 991.98px) {
    .admin-sidebar {
        transform: translateX(-100%);
    }
    
    .admin-sidebar.show {
        transform: translateX(0);
    }
    
    .admin-main-content {
        margin-left: 0;
        width: 100%;
        padding: var(--admin-spacing-md);
    }
    
    .sidebar-collapsed ~ .admin-main-content {
        margin-left: 0;
    }
    
    .filter-item {
        width: 100%;
    }
    
    .filter-item .form-control,
    .filter-item .form-select {
        width: 100%;
        min-width: 100%;
    }
}

@media (max-width: 767.98px) {
    .admin-main-content {
        padding: var(--admin-spacing-sm);
    }
    
    .card-body {
        padding: var(--admin-spacing-md);
    }
    
    .page-info {
        order: -1;
        margin-bottom: var(--admin-spacing-sm);
    }
}

/* ================================
   12. RTL SUPPORT
   ================================ */
[dir="rtl"] .admin-sidebar {
    left: auto;
    right: 0;
}

[dir="rtl"] .admin-main-content {
    margin-left: 0;
    margin-right: var(--admin-sidebar-width);
}

[dir="rtl"] .sidebar-collapsed ~ .admin-main-content {
    margin-left: 0;
    margin-right: var(--admin-sidebar-collapsed);
}

[dir="rtl"] .sidebar-nav .nav-link:hover {
    transform: translateX(-3px);
}

[dir="rtl"] .mobile-menu-toggle {
    right: auto;
    left: var(--admin-spacing-lg);
}

@media (max-width: 991.98px) {
    [dir="rtl"] .admin-sidebar {
        transform: translateX(100%);
    }
    
    [dir="rtl"] .admin-sidebar.show {
        transform: translateX(0);
    }
    
    [dir="rtl"] .admin-main-content {
        margin-right: 0;
    }
}

.w-fit {
    width: fit-content !important;
}

/* ================================
   15. HTMX LOADING STATES
   ================================ */
.htmx-indicator {
    display: none;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.htmx-request .htmx-indicator {
    display: block;
}

.htmx-request.htmx-indicator {
    display: block;
}

.htmx-swapping {
    opacity: 0;
    transition: opacity 0.2s ease-out;
}

.htmx-settling {
    opacity: 1;
    transition: opacity 0.2s ease-in;
}

/* Loading overlay for tables */
#table-container {
    position: relative;
    min-height: 200px;
}

#table-container.htmx-request::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(var(--admin-bg-primary), 0.5);
    backdrop-filter: blur(2px);
    z-index: 10;
}

/* ================================
   17. ACCESSIBILITY
   ================================ */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Focus styles */
a:focus,
button:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--admin-accent-primary);
    outline-offset: 2px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ================================
   18. R2 STORAGE MANAGEMENT
   ================================ */

/* Modal Z-Index Fix */
.modal-backdrop {
    z-index: var(--z-modal-backdrop) !important;
}

.modal-backdrop + .modal-backdrop {
    z-index: 1056;
}

.modal {
    z-index: var(--z-modal) !important;
}

.dropdown-menu {
    z-index: var(--z-popover) !important;
}

/* Prevent transform issues with modals */
#content,
.display-page {
    position: static !important;
    transform: none !important;
}

/* R2 Toolbar Responsive */
@media (max-width: 767.98px) {
    .card-body .row {
        gap: var(--admin-spacing-sm);
    }
    
    .card-body .btn-group {
        flex-direction: column;
        width: 100%;
    }
    
    .card-body .btn-group .btn {
        width: 100%;
        margin-bottom: var(--admin-spacing-xs);
    }
}

/* ================================================================================
   USER-FACING COMPONENTS (consolidated from user-theme.css)
   ================================================================================ */
/* ================================================================================
   BIBLE INSTITUTE LMS - USER/STUDENT THEME
   ================================================================================
   Adapted from admin-theme.css  – same colour palette, lighter feel for students.
   Included in user-facing templates (home, courses, profile, quiz).
   ================================================================================ */

:root {
    --user-accent:          #6B705C;   /* Olive Slate – primary interactive colour  */
    --user-accent-hover:    #5A5E4F;   /* Darker Olive on hover                     */
    --user-accent-light:    #A5A58D;   /* Muted Sage – secondary text / badges      */
    --user-accent-soft:     #DDDDC8;   /* Very light sage for backgrounds           */
    --user-bg:              #F8F7F2;   /* Warm Bone background                      */
    --user-surface:         #FFFFFF;   /* Card surface                              */
    --user-border:          rgba(107,112,92,.18);
    --user-border-strong:   rgba(107,112,92,.35);

    --user-shadow-sm: 0 1px 3px rgba(0,0,0,.08);
    --user-shadow-md: 0 4px 12px rgba(0,0,0,.10);
    --user-shadow-lg: 0 10px 28px rgba(0,0,0,.12);

    --user-radius-sm: .375rem;
    --user-radius-md: .75rem;
    --user-radius-lg: 1rem;
    --user-radius-xl: 1.5rem;

    --transition-base: .25s ease;
}

/* ================================
   Global body background
   ================================ */
[data-bs-theme="light"] body {
    background-color: var(--user-bg) !important;
}

/* ================================
   Buttons
   ================================ */
.btn-user-primary {
    background-color: var(--user-accent);
    border-color: var(--user-accent);
    color: #fff;
    border-radius: var(--user-radius-sm);
    transition: background-color var(--transition-base), box-shadow var(--transition-base);
}
.btn-user-primary:hover,
.btn-user-primary:focus {
    background-color: var(--user-accent-hover);
    border-color: var(--user-accent-hover);
    color: #fff;
    box-shadow: 0 4px 12px rgba(107,112,92,.35);
}

/* ================================
   Cards
   ================================ */
.user-card {
    background: var(--user-surface);
    border: 1px solid var(--user-border);
    border-radius: var(--user-radius-md);
    box-shadow: var(--user-shadow-sm);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.user-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--user-shadow-md);
}

/* ================================
   Quiz status badges (sidebar)
   ================================ */
.quiz-badge-open {
    font-size: .72rem;
    background: #d4edda;
    color: #155724;
    border-radius: 20px;
    padding: 2px 8px;
    font-weight: 600;
}
.quiz-badge-closed {
    font-size: .72rem;
    background: #e2e8e0;
    color: #495057;
    border-radius: 20px;
    padding: 2px 8px;
    font-weight: 600;
}
.quiz-badge-done {
    font-size: .72rem;
    background: #cce5ff;
    color: #004085;
    border-radius: 20px;
    padding: 2px 8px;
    font-weight: 600;
}

/* ================================
   Sidebar (course detail)
   ================================ */
.course-sidebar .list-group-item {
    border-radius: .5rem !important;
    margin-bottom: .2rem;
    border: 0;
    font-weight: 500;
    transition: background-color var(--transition-base);
}
.course-sidebar .list-group-item:hover {
    background: var(--user-accent-soft);
}
.course-sidebar .list-group-item.active {
    background: var(--user-accent);
    color: #fff;
    box-shadow: 0 4px 10px rgba(107,112,92,.3);
}

/* ================================
   Dark mode overrides
   ================================ */
[data-bs-theme="dark"] {
    --user-surface:       #1e2128;
    --user-bg:            #121212;
    --user-border:        rgba(165,165,141,.18);
    --user-border-strong: rgba(165,165,141,.32);
    --user-accent-soft:   rgba(107,112,92,.25);
}

[data-bs-theme="dark"] .user-card {
    color: #e0e0e0;
}

[data-bs-theme="dark"] .course-sidebar .list-group-item {
    color: #c8c8c8;
}
[data-bs-theme="dark"] .course-sidebar .list-group-item:hover {
    background: rgba(107,112,92,.25);
    color: #e0e0e0;
}

[data-bs-theme="dark"] .quiz-badge-open {
    background: rgba(25,135,84,.25);
    color: #75c98a;
}
[data-bs-theme="dark"] .quiz-badge-closed {
    background: rgba(108,117,125,.22);
    color: #adb5bd;
}
[data-bs-theme="dark"] .quiz-badge-done {
    background: rgba(13,110,253,.2);
    color: #6ea8fe;
}

[data-bs-theme="dark"] body {
    background-color: var(--user-bg) !important;
}

/* ================================================================================
   ALPINE/HTMX COMPONENTS (consolidated from alpine-components.css)
   ================================================================================ */
/* Alpine Components CSS */

/* Loading Overlay */
.loading-overlay {
    backdrop-filter: blur(4px);
}

/* Column Manager Dropdown */
.dropdown-menu .form-check {
    padding: 0.25rem 0.5rem;
    cursor: pointer;
}

.dropdown-menu .form-check:hover {
    background-color: var(--bs-light);
}

/* Checkbox Selection */
.row-checkbox:checked {
    accent-color: var(--bs-primary);
}

/* Dark Mode Overrides */
[data-bs-theme="dark"] .dropdown-menu {
    background-color: var(--bs-dark);
    border-color: var(--bs-border-color);
}

[data-bs-theme="dark"] .dropdown-menu .form-check:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

[data-bs-theme="dark"] .toast {
    background-color: var(--bs-dark);
    color: var(--bs-light);
}

[dir="rtl"] .position-fixed.end-0 {
    left: 0 !important;
    right: auto !important;
}

/* Responsive Tables */
@media (max-width: 767.98px) {
    .table-responsive {
        font-size: 0.875rem;
    }

    .table th,
    .table td {
        padding: 0.5rem !important;
    }

    .btn-group-vertical .btn {
        font-size: 0.75rem;
        padding: 0.375rem 0.5rem;
    }
}

/* ================================================================================
   APPLICATION DESIGN SYSTEM — single source of truth
   ================================================================================ */
:root {
    --app-bg: #F4F8FC;
    --app-surface: #FFFFFF;
    --app-surface-soft: #EAF2F8;
    --app-primary: #2F5D73;
    --app-primary-hover: #24495B;
    --app-primary-soft: #DCEAF3;
    --app-accent: #A77B35;
    --app-ink: #1E293B;
    --app-muted: #5F6F7E;
    --app-border: #D6E2EA;
    --app-danger: #B54747;
    --app-success: #2F7A5B;
    --app-warning: #A36A1B;
    --app-radius-control: .625rem;
    --app-radius-card: 1rem;
    --app-shadow-sm: 0 2px 10px rgba(31, 58, 74, .06);
    --app-shadow-md: 0 10px 28px rgba(31, 58, 74, .10);
    --app-motion: .18s ease;

    --bs-primary: #2F5D73;
    --bs-primary-rgb: 47, 93, 115;
    --bs-link-color: #2F5D73;
    --bs-link-hover-color: #24495B;

    --user-accent: var(--app-primary);
    --user-accent-hover: var(--app-primary-hover);
    --user-accent-light: #6F8FA3;
    --user-accent-soft: var(--app-primary-soft);
    --user-bg: var(--app-bg);
    --user-surface: var(--app-surface);
    --user-border: var(--app-border);
    --user-border-strong: #AFC3D0;
    --user-radius-sm: var(--app-radius-control);
    --transition-base: var(--app-motion);
}

html {
    background: var(--app-bg);
    scroll-behavior: smooth;
}

body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background: var(--app-bg);
    color: var(--app-ink);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
    font-size: 1rem;
    line-height: 1.6;
}

body > main { flex: 1 0 auto; }

a {
    color: var(--app-primary);
    text-underline-offset: .18em;
    transition: color var(--app-motion), background-color var(--app-motion), box-shadow var(--app-motion);
}

a:hover { color: var(--app-primary-hover); }

.app-navbar,
.navbar {
    width: 100%;
    background: rgba(255, 255, 255, .94);
    border-bottom: 1px solid var(--app-border);
    box-shadow: 0 2px 14px rgba(31, 58, 74, .05);
    backdrop-filter: blur(12px);
}

.navbar-brand img { object-fit: contain; }

.navbar-nav .nav-link,
.sidebar-nav .nav-link,
.dropdown-item,
.page-link {
    border-radius: var(--app-radius-control);
    transition: color var(--app-motion), background-color var(--app-motion), transform var(--app-motion);
}

.navbar-nav .nav-link {
    color: var(--app-ink);
    font-weight: 600;
    padding: .55rem .75rem !important;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link:focus,
.navbar-nav .nav-link.active {
    color: var(--app-primary-hover) !important;
    background: var(--app-primary-soft);
}

.navbar-toggler {
    width: 44px;
    height: 44px;
    border-color: var(--app-border);
    border-radius: var(--app-radius-control);
}

.app-nav-actions {
    display: flex;
    align-items: center;
    gap: .5rem;
}

.btn {
    min-height: 42px;
    border-radius: var(--app-radius-control);
    font-weight: 650;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .4rem;
    transition: color var(--app-motion), background-color var(--app-motion), border-color var(--app-motion), box-shadow var(--app-motion), transform var(--app-motion);
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary,
.btn-user-primary {
    --bs-btn-bg: var(--app-primary);
    --bs-btn-border-color: var(--app-primary);
    --bs-btn-hover-bg: var(--app-primary-hover);
    --bs-btn-hover-border-color: var(--app-primary-hover);
    --bs-btn-active-bg: #193C4D;
    --bs-btn-active-border-color: #193C4D;
    background: var(--app-primary);
    border-color: var(--app-primary);
    color: #fff;
}

.btn-outline-primary {
    --bs-btn-color: var(--app-primary);
    --bs-btn-border-color: var(--app-primary);
    --bs-btn-hover-bg: var(--app-primary);
    --bs-btn-hover-border-color: var(--app-primary);
}

.card,
.admin-card,
.user-card,
.modal-content,
.dropdown-menu {
    background: var(--app-surface);
    border: 1px solid var(--app-border);
    border-radius: var(--app-radius-card);
    box-shadow: var(--app-shadow-sm);
}

.card,
.admin-card,
.user-card {
    transition: border-color var(--app-motion), box-shadow var(--app-motion), transform var(--app-motion);
}

.card:hover,
.admin-card:hover,
.user-card:hover {
    border-color: #B8CCD8;
    box-shadow: var(--app-shadow-md);
}

.card-header,
.card-footer {
    background: var(--app-surface-soft);
    border-color: var(--app-border);
}

.form-control,
.form-select,
.form-check-input,
.input-group-text {
    border-color: var(--app-border);
    border-radius: var(--app-radius-control);
    background-color: var(--app-surface);
    color: var(--app-ink);
    transition: border-color var(--app-motion), box-shadow var(--app-motion), background-color var(--app-motion);
}

.form-control,
.form-select { min-height: 44px; }

.form-control:focus,
.form-select:focus,
.form-check-input:focus {
    border-color: var(--app-primary);
    box-shadow: 0 0 0 .2rem rgba(47, 93, 115, .14);
}

.form-check-input:checked {
    background-color: var(--app-primary);
    border-color: var(--app-primary);
}

.table { --bs-table-bg: transparent; }
.table > :not(caption) > * > * { border-color: var(--app-border); }
.table thead th { background: var(--app-surface-soft); color: var(--app-ink); }

footer {
    flex-shrink: 0;
    background: #1F3A4A;
    color: #F4F8FC;
}

footer a { color: #D9EAF4; }
.footer-bottom { background: #18303E; }

.public-hero,
.public-cta {
    background: linear-gradient(135deg, #24495B 0%, #3D718A 100%);
    color: #fff;
}

.public-hero { min-height: min(76vh, 720px); }

.login-page {
    background: radial-gradient(circle at top, #FFFFFF 0, var(--app-bg) 66%);
}

.login-page { padding: clamp(2rem, 7vw, 5rem) 0; }

.login-card {
    background: var(--app-surface);
    border: 1px solid var(--app-border);
    border-radius: var(--app-radius-card);
    box-shadow: var(--app-shadow-md);
    overflow: hidden;
}

.login-card .card-body { padding: 2rem; }
.login-card .btn-primary { min-height: 50px; width: 100%; }
.login-logo { width: 100%; max-width: 160px; height: auto; }

.loading-overlay { z-index: 9998; background: rgba(18, 37, 48, .34); backdrop-filter: blur(3px); }
.loading-spinner-lg { width: 3rem; height: 3rem; }
.is-clickable { cursor: pointer; }
.min-h-300 { min-height: 300px; }
.action-icon { width: 38px; height: 38px; padding: 0; }
.progress-thin { height: 8px; }
.progress-download { height: 25px; }
.progress-zero { width: 0; }
.min-w-160 { min-width: 160px; }
.sort-icon { opacity: .3; }
.hidden-initially { display: none; }
.file-meta { font-size: .7rem; }
.mobile-fab { bottom: 20px; inset-inline-end: 20px; z-index: 1040; width: 56px; height: 56px; border-radius: 50%; box-shadow: var(--app-shadow-md); }
.mobile-menu-panel { z-index: 1039; max-height: 70vh; overflow-y: auto; }
.mobile-menu-close { width: 32px; height: 32px; padding: 0; }
.text-accent { color: var(--app-primary) !important; }
.badge-soft { background: var(--app-primary-soft); color: var(--app-primary); }
.badge-warning-soft { background: #FFF3D6; color: #7A5419; }
.section-kicker { letter-spacing: .05em; }
.course-sidebar-header { background: var(--app-primary); border-radius: var(--app-radius-card) var(--app-radius-card) 0 0; }
.content-panel { min-height: 85vh; }
.content-empty { min-height: 60vh; }
.carousel-media { max-height: 420px; object-fit: cover; }
.brand-mark { max-height: 160px; opacity: .9; }
.statement-media { max-height: 280px; }
.video-embed { max-width: 600px; margin-inline: auto; }

/* --- Lesson video player: keep the frame inside its card without overflowing --- */
.lesson-video-wrapper {
    width: 100%;
    max-width: 100%;
    min-width: 0;
    box-sizing: border-box;
}

.lesson-video-wrapper .video-js {
    box-sizing: border-box;
    width: 100% !important;
    max-width: 100%;
}

.lesson-video-wrapper .vjs-tech {
    max-width: 100%;
    box-sizing: border-box;
    object-fit: contain !important;
}
/* ------------------------------------------------------------------------- */

.pdf-viewer canvas,
.video-js.vjs-fluid,
.video-js.vjs-16-9 {
    border: 1px solid var(--app-border);
    border-radius: var(--app-radius-control);
    overflow: hidden;
}

progress.app-progress {
    width: 100%;
    height: 1.1rem;
    overflow: hidden;
    border: 0;
    border-radius: 999px;
    background: var(--app-surface-soft);
    accent-color: var(--app-primary);
}

progress.app-progress::-webkit-progress-bar { background: var(--app-surface-soft); }
progress.app-progress::-webkit-progress-value { background: var(--app-primary); border-radius: 999px; }
progress.app-progress::-moz-progress-bar { background: var(--app-primary); border-radius: 999px; }

@media (max-width: 991.98px) {
    .navbar-collapse {
        margin-top: .75rem;
        padding: .75rem;
        background: var(--app-surface);
        border: 1px solid var(--app-border);
        border-radius: var(--app-radius-card);
        box-shadow: var(--app-shadow-md);
    }

    .app-nav-actions {
        align-items: stretch;
        flex-direction: column;
        margin-top: .5rem;
    }

    .app-nav-actions .form-select,
    .app-nav-actions .btn { width: 100%; }
}

@media (max-width: 575.98px) {
    body { font-size: .95rem; }
    .public-hero { min-height: 68vh; }
    .login-card .card-body { padding: 1.25rem !important; }
    .success-card { padding: 2rem 1.25rem; }
    .card-body { padding: 1rem; }
    .btn { min-height: 44px; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
}

.content-narrow {
  max-width: 48rem;
}

.btn-icon-sm {
  width: 38px;
  height: 38px;
  padding: 0;
}

.metric-card {
  background: var(--app-primary-soft);
  border-color: var(--app-border);
  color: var(--app-ink);
}

.metric-card i {
  color: var(--app-primary);
}

/* Column selector dropdown options */
.column-option {
  cursor: pointer;
  white-space: nowrap;
}
.column-option:hover {
  background-color: var(--bs-tertiary-bg, #f0f0f0);
}
.column-option .form-check-input {
  flex-shrink: 0;
  margin-top: 0;
}

/* Inline style replacements */
.scanner-video { max-height: 300px; }
.application-decision-form { display: inline; }

/* ================================================================================
   19. LESSON EDITOR REDESIGN
   ================================================================================
   Responsive grid for the lesson create/update page. Replaces cramped
   Bootstrap row/col with a CSS grid that uses available main-content width.
   ================================================================================ */

/* --- Root override: remove 900px cap for the lesson editor --- */
.lesson-editor.admin-form-page {
    max-width: none;
    padding: var(--admin-spacing-lg);
}

/* --- Responsive Grid --- */
.lesson-editor__grid {
    display: grid;
    grid-template-columns: 1fr 380px;
    grid-template-areas:
        "details sidebar"
        "drive sidebar";
    gap: var(--admin-spacing-lg);
    align-items: start;
}

.lesson-editor__details {
    grid-area: details;
}

.lesson-editor__drive {
    grid-area: drive;
}

.lesson-editor__sidebar {
    grid-area: sidebar;
    position: sticky;
    top: 1rem;
}

/* --- Drive browser: bounded scroll with visible scrollbar --- */
.lesson-editor__drive #drive-files {
    overflow-y: auto;
    max-height: 60vh;
    min-height: 260px;
}

/* Set scrollbar width so it's always visible on Windows */
.lesson-editor__drive #drive-files {
    scrollbar-width: thin;
}

/* --- Selected lectures: bounded scroll list --- */
.lesson-editor__sidebar #lectures-display {
    overflow-y: auto;
    max-height: calc(100vh - 14rem);
    min-height: 200px;
    scrollbar-width: thin;
}

/* --- Form actions below the grid --- */
.lesson-editor__actions {
    display: flex;
    gap: var(--admin-spacing-md);
    padding-top: var(--admin-spacing-lg);
    border-top: 1px solid var(--admin-border-light);
    margin-top: var(--admin-spacing-lg);
}

.lesson-editor__actions .btn {
    flex: 1;
    max-width: 200px;
}

.lesson-editor__actions .btn:first-child {
    flex: 2;
    max-width: none;
}

/* --- Sidebar card: keep header fixed, only body scrolls --- */
.lesson-editor__sidebar .card {
    display: flex;
    flex-direction: column;
    max-height: calc(100vh - 4rem);
}

.lesson-editor__sidebar .card-header {
    flex-shrink: 0;
}

.lesson-editor__sidebar .card-body {
    flex: 1 1 auto;
    overflow-y: auto;
}

/* --- Dark mode consistency --- */
[data-bs-theme="dark"] .lesson-editor__drive #drive-files,
[data-bs-theme="dark"] .lesson-editor__sidebar #lectures-display {
    scrollbar-color: var(--admin-border) transparent;
}

/* --- Tablet/mobile: stack everything in natural order, no sticky --- */
@media (max-width: 991.98px) {
    .lesson-editor.admin-form-page {
        padding: var(--admin-spacing-md);
    }

    .lesson-editor__grid {
        grid-template-columns: 1fr;
        grid-template-areas:
            "details"
            "drive"
            "sidebar";
        gap: var(--admin-spacing-md);
    }

    .lesson-editor__sidebar {
        position: static;
    }

    .lesson-editor__sidebar .card {
        max-height: none;
    }

    .lesson-editor__sidebar .card-body {
        max-height: 50vh;
        overflow-y: auto;
    }

    .lesson-editor__drive #drive-files {
        max-height: 50vh;
    }

    .lesson-editor__actions {
        flex-direction: column;
    }

    .lesson-editor__actions .btn,
    .lesson-editor__actions .btn:first-child {
        max-width: none;
        width: 100%;
    }
}

/* --- Small mobile --- */
@media (max-width: 575.98px) {
    .lesson-editor.admin-form-page {
        padding: var(--admin-spacing-sm);
    }

    .lesson-editor__grid {
        gap: var(--admin-spacing-sm);
    }

    .lesson-editor__drive #drive-files {
        min-height: 200px;
        max-height: 40vh;
    }
}

/* ================================================================================
   20. COURSE LEARNING PAGE — student lesson dashboard
   ================================================================================ */

/* --- Shell: refined container with top padding reduction --- */
.course-learning-shell {
    max-width: 100%;
}

/* --- Course header: polished gradient surface with rounded corners --- */
.course-learning-header {
    background: linear-gradient(135deg, var(--app-surface) 0%, var(--app-primary-soft) 100%);
    border: 1px solid var(--app-border);
    border-radius: var(--app-radius-card);
    box-shadow: var(--app-shadow-sm);
    transition: border-color var(--app-motion), box-shadow var(--app-motion);
}

.course-learning-header:hover {
    border-color: #B8CCD8;
    box-shadow: var(--app-shadow-md);
}

.course-learning-header-icon {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    background: var(--app-primary);
    color: #fff;
    border-radius: var(--app-radius-md);
    font-size: 1.35rem;
}

.course-learning-title {
    color: var(--app-ink);
    line-height: 1.3;
}

.course-learning-meta {
    margin-top: 0.15rem;
}

.course-learning-badge {
    font-weight: 600;
    font-size: 0.78rem;
    padding: 0.3em 0.75em;
}

/* --- Stats pills (lesson/quiz counts) --- */
.course-learning-stats {
    flex-shrink: 0;
    flex-wrap: wrap;
}

.course-learning-stat {
    background: var(--app-surface);
    border: 1px solid var(--app-border);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    color: var(--app-ink);
    white-space: nowrap;
    transition: border-color var(--app-motion), box-shadow var(--app-motion);
}

.course-learning-stat i {
    color: var(--app-primary);
    font-size: 0.85rem;
}

.course-learning-stat:hover {
    border-color: #B8CCD8;
    box-shadow: var(--shadow-xs);
}

/* --- Main content panel: preserve existing height but refine --- */
.course-learning-panel {
    min-height: 70vh;
}

.course-learning-panel .content-empty {
    min-height: 55vh;
}

/* --- Course learning sidebar: scoped refinement --- */
.course-learning-sidebar {
    border-radius: var(--app-radius-card);
    overflow: hidden;
    box-shadow: var(--app-shadow-sm);
    border: 1px solid var(--app-border);
    transition: border-color var(--app-motion), box-shadow var(--app-motion);
}

.course-learning-sidebar:hover {
    border-color: #B8CCD8;
    box-shadow: var(--app-shadow-md);
}

/* -- Header within scoped sidebar -- */
.course-learning-sidebar .course-sidebar-header {
    background: var(--app-primary);
    border-radius: 0;
    padding: 0.9rem 1rem;
}

.course-learning-sidebar .course-sidebar-header h5 {
    font-size: 0.95rem;
}

/* -- Section labels -- */
.course-learning-sidebar .course-learning-sidebar__label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.6rem 0.75rem 0.3rem !important;
    margin-bottom: 0.2rem;
    font-size: 0.73rem;
    letter-spacing: 0.06em;
    color: var(--app-muted);
    border-bottom: 1px solid var(--app-border);
}

/* -- List containers -- */
.course-learning-sidebar .course-learning-sidebar__list {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    padding: 0.25rem 0.5rem;
}

/* -- List items -- */
.course-learning-sidebar .course-learning-sidebar__item {
    border-radius: var(--app-radius-control) !important;
    margin-bottom: 0;
    padding: 0.6rem 0.75rem;
    font-size: 0.88rem;
    font-weight: 500;
    line-height: 1.4;
    color: var(--app-ink);
    border: 0;
    transition: background-color var(--app-motion), color var(--app-motion), box-shadow var(--app-motion);
    word-break: break-word;
    overflow-wrap: anywhere;
}

.course-learning-sidebar .course-learning-sidebar__item i {
    flex-shrink: 0;
    font-size: 0.8rem;
}

.course-learning-sidebar .course-learning-sidebar__item:hover,
.course-learning-sidebar .course-learning-sidebar__item:focus-visible {
    background: var(--app-primary-soft);
    color: var(--app-primary);
    outline: none;
}

.course-learning-sidebar .course-learning-sidebar__item.active {
    background: var(--app-primary);
    color: #fff;
    box-shadow: 0 4px 12px rgba(47, 93, 115, 0.25);
}

/* -- Dark mode -- */
[data-bs-theme="dark"] .course-learning-sidebar {
    border-color: var(--user-border);
}

[data-bs-theme="dark"] .course-learning-sidebar:hover {
    border-color: var(--user-border-strong);
}

[data-bs-theme="dark"] .course-learning-sidebar .course-learning-sidebar__item {
    color: #c8c8c8;
}

[data-bs-theme="dark"] .course-learning-sidebar .course-learning-sidebar__item:hover,
[data-bs-theme="dark"] .course-learning-sidebar .course-learning-sidebar__item:focus-visible {
    background: rgba(165, 165, 141, 0.12);
    color: #e0e0e0;
}

[data-bs-theme="dark"] .course-learning-sidebar .course-learning-sidebar__item.active {
    background: var(--app-primary);
    color: #fff;
    box-shadow: 0 4px 12px rgba(47, 93, 115, 0.4);
}

[data-bs-theme="dark"] .course-learning-sidebar .course-learning-sidebar__label {
    color: #9CA3AF;
    border-bottom-color: var(--user-border);
}

/* --- Lesson media cards: refined look --- */
.lesson-media-card {
    border-radius: var(--app-radius-card);
    border: 1px solid var(--app-border);
    overflow: hidden;
    transition: border-color var(--app-motion), box-shadow var(--app-motion);
}

.lesson-media-card:hover {
    border-color: #B8CCD8;
    box-shadow: var(--app-shadow-sm);
}

.lesson-media-header {
    background: var(--app-surface-soft);
    border-bottom: 1px solid var(--app-border);
    padding: 0.75rem 1rem;
}

.lesson-media-header h6 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--app-ink);
}

/* --- Progress percentage label next to the progress bar --- */
.progress-percent {
    flex-shrink: 0;
    min-width: 3em;
    text-align: end;
    color: var(--app-primary);
    font-variant-numeric: tabular-nums;
}

/* --- RTL awareness for progress percentage --- */
[dir="rtl"] .progress-percent {
    text-align: start;
}

/* --- Dark mode refinements for learning page components --- */
[data-bs-theme="dark"] .course-learning-header {
    background: linear-gradient(135deg, var(--user-surface) 0%, rgba(47, 93, 115, 0.15) 100%);
    border-color: var(--user-border);
}

[data-bs-theme="dark"] .course-learning-header:hover {
    border-color: var(--user-border-strong);
}

[data-bs-theme="dark"] .course-learning-stat {
    background: var(--user-surface);
    border-color: var(--user-border);
}

[data-bs-theme="dark"] .course-learning-stat:hover {
    border-color: var(--user-border-strong);
}

[data-bs-theme="dark"] .lesson-media-card:hover {
    border-color: var(--user-border-strong);
}

[data-bs-theme="dark"] .progress-percent {
    color: var(--user-accent-light);
}

/* --- Responsive: narrow screens --- */
@media (max-width: 767.98px) {
    .course-learning-header {
        flex-direction: column;
        align-items: flex-start !important;
    }

    .course-learning-stats {
        width: 100%;
    }

    .course-learning-stat {
        flex: 1;
        justify-content: center;
    }

    .course-learning-header-icon {
        width: 40px;
        height: 40px;
        font-size: 1.1rem;
    }

    .course-learning-title {
        font-size: 1.15rem !important;
    }
}