/* Main styles for Repaso */

:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --border-radius: 8px;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.15);
    /* Question type colors */
    --question-generated-color: #0d6efd; /* Blue */
    --question-extracted-color: #fd7e14; /* Orange */
}

/* === GLOBAL FOUNDATION === */

/* Base */
* {
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    height: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    /* iOS safe area support */
    padding-top: env(safe-area-inset-top);
    padding-bottom: env(safe-area-inset-bottom);
    padding-left: env(safe-area-inset-left);
    padding-right: env(safe-area-inset-right);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

main {
    flex: 1;
}

/* === NAVIGATION === */
.navbar {
    box-shadow: var(--shadow-sm);
    /* Sticky with safe area offset */
    padding-top: env(safe-area-inset-top);
}

.navbar-brand {
    font-weight: 600;
    font-size: 1.25rem;
    letter-spacing: -0.01em;
}

.navbar-toggler {
    border: none;
    padding: 0.5rem;
    min-width: 44px;
    min-height: 44px;
}

.navbar-toggler:focus {
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.4);
}

/* User avatar in navbar dropdown */
.navbar-avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    font-weight: 600;
    font-size: 0.8rem;
    flex-shrink: 0;
}

/* Mobile nav improvements */
@media (max-width: 991.98px) {
    .navbar-collapse {
        padding-bottom: 0.5rem;
        max-height: 80vh;
        overflow-y: auto;
    }

    .navbar-nav .nav-link {
        padding: 0.75rem 1rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        min-height: 48px;
        display: flex;
        align-items: center;
    }

    .navbar-nav .dropdown-menu {
        background: transparent;
        border: none;
        box-shadow: none;
        padding: 0 0 0 1rem;
    }

    .navbar-nav .dropdown-item {
        color: rgba(255, 255, 255, 0.8);
        padding: 0.625rem 1rem;
        min-height: 44px;
        display: flex;
        align-items: center;
    }

    .navbar-nav .dropdown-item:hover,
    .navbar-nav .dropdown-item:focus {
        background: rgba(255, 255, 255, 0.1);
        color: white;
    }

    .navbar-nav .dropdown-divider {
        border-color: rgba(255, 255, 255, 0.15);
    }
}

/* === FOOTER === */
.site-footer {
    border-top: 1px solid rgba(0, 0, 0, 0.08);
    background: var(--light-color, #f8f9fa);
    padding-bottom: calc(0.75rem + env(safe-area-inset-bottom));
}

/* === LOGIN PAGE === */
.login-container {
    max-width: 440px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

@media (min-width: 768px) {
    .login-container {
        margin-top: 2.5rem;
        padding: 0;
    }
}

.login-card {
    border: none;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08), 0 2px 8px rgba(0, 0, 0, 0.04);
    overflow: hidden;
}

.login-card:hover {
    transform: none;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08), 0 2px 8px rgba(0, 0, 0, 0.04);
}

.login-header {
    background: linear-gradient(135deg, #0d6efd 0%, #0a58ca 100%);
    padding: 2.5rem 2rem;
    text-align: center;
    color: white;
}

.login-header i {
    font-size: 2.75rem;
    margin-bottom: 0.5rem;
    display: block;
}

.login-header h3 {
    font-weight: 700;
    letter-spacing: -0.02em;
}

.login-header p {
    opacity: 0.85;
    font-size: 0.95rem;
}

.login-body {
    padding: 2rem;
}

.provider-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    width: 100%;
    padding: 0.875rem 1.25rem;
    border-radius: 10px;
    font-weight: 500;
    font-size: 1rem;
    transition: all 0.2s ease;
    text-decoration: none;
    border: 1.5px solid #dadce0;
    background: white;
    color: #3c4043;
    min-height: 48px;
}

.provider-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    border-color: #c2c8d0;
    background: #f8f9fa;
    color: #3c4043;
}

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

.provider-btn i {
    font-size: 1.25rem;
    color: #4285f4;
}

.login-info-box {
    background-color: #e7f1ff;
    border: 1px solid #b8d4fe;
    border-radius: 10px;
    padding: 0.875rem 1rem;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.login-info-box i {
    color: #0d6efd;
    font-size: 1.125rem;
    margin-top: 0.125rem;
    flex-shrink: 0;
}

.login-info-box p {
    margin: 0;
    color: #1a3a5c;
    font-size: 0.875rem;
    line-height: 1.5;
}

.login-info-box strong {
    color: #0d3b66;
}

.login-help {
    text-align: center;
    padding: 1rem 0 1.5rem;
}

.login-help p {
    color: #6c757d;
    font-size: 0.8125rem;
    margin: 0;
}

@media (max-width: 767.98px) {
    .login-header {
        padding: 2rem 1.5rem;
    }

    .login-body {
        padding: 1.5rem;
    }

    .login-header i {
        font-size: 2.25rem;
    }

    .login-header h3 {
        font-size: 1.5rem;
    }
}

/* === PRACTICE HOME === */
.practice-home h1 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.practice-home .stat-card .card-body {
    padding: 1rem 0.75rem;
}

.practice-home .stat-card h5 {
    font-size: 0.8125rem;
    margin-bottom: 0.25rem;
}

.practice-home .stat-card h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0;
}

@media (max-width: 767.98px) {
    .practice-home {
        padding-left: 0.75rem;
        padding-right: 0.75rem;
    }

    .practice-home h1 {
        font-size: 1.375rem;
        margin-bottom: 1rem;
    }

    .practice-home .stats-row {
        margin-bottom: 0.75rem !important;
    }

    .practice-home .stat-card {
        margin-bottom: 0.5rem;
    }

    .practice-home .stat-card:hover {
        transform: none;
        box-shadow: var(--shadow);
    }

    .practice-home .stat-card .card-body {
        padding: 0.75rem 0.5rem;
    }

    .practice-home .stat-card h2 {
        font-size: 1.5rem;
    }

    .practice-home .action-btn {
        width: 100%;
        min-height: 52px;
        font-size: 1.0625rem;
    }

    .practice-home .sidebar-section {
        margin-top: 1.5rem;
    }
}

/* Cards */
.card {
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: transform 0.2s, box-shadow 0.2s;
    border: 1px solid rgba(0, 0, 0, 0.08);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.card-header {
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    background-color: rgba(0, 0, 0, 0.02);
    font-weight: 600;
}

/* Buttons */
.btn {
    border-radius: 6px;
    padding: 0.625rem 1.25rem;
    font-weight: 500;
    transition: all 0.2s ease;
    min-height: 44px; /* Touch target minimum for mobile */
}

.btn:active {
    transform: scale(0.98);
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    min-height: 48px;
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    min-height: 36px;
}

/* Forms */
.form-control, .form-select {
    border-radius: 6px;
    border: 1px solid #dee2e6;
    padding: 0.625rem 0.75rem;
    min-height: 44px; /* Touch target minimum for mobile */
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.15);
}

.form-label {
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--dark-color);
}

.form-check-input {
    width: 1.25rem;
    height: 1.25rem;
    margin-top: 0.15rem;
}

/* Status badges */
.badge {
    padding: 0.4em 0.7em;
    font-weight: 500;
    border-radius: 4px;
}

/* Progress bars */
.progress {
    height: 8px;
    border-radius: 4px;
    background-color: #e9ecef;
}

.progress-bar {
    transition: width 0.3s ease;
}

/* List groups */
.list-group-item {
    border: 1px solid rgba(0, 0, 0, 0.08);
    padding: 1rem;
    transition: background-color 0.15s ease;
}

.list-group-item-action {
    cursor: pointer;
    min-height: 44px; /* Touch target for list items */
    display: flex;
    align-items: center;
}

.list-group-item-action:hover {
    background-color: rgba(0, 0, 0, 0.02);
}

/* Loading States */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-spinner {
    width: 3rem;
    height: 3rem;
    border-width: 0.3em;
}

.loading-inline {
    display: inline-block;
    width: 1rem;
    height: 1rem;
    border-width: 0.15em;
    vertical-align: middle;
    margin-left: 0.5rem;
}

.btn-loading {
    position: relative;
    pointer-events: none;
    color: transparent !important;
}

.btn-loading::after {
    content: "";
    position: absolute;
    width: 1rem;
    height: 1rem;
    top: 50%;
    left: 50%;
    margin-left: -0.5rem;
    margin-top: -0.5rem;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spinner-border 0.75s linear infinite;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 9999;
    max-width: 350px;
}

.toast {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(0, 0, 0, 0.08);
    margin-bottom: 0.75rem;
    opacity: 0;
    transform: translateX(100%);
    transition: all 0.3s ease;
}

.toast.show {
    opacity: 1;
    transform: translateX(0);
}

.toast-header {
    background: transparent;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    padding: 0.75rem 1rem;
    font-weight: 600;
}

.toast-body {
    padding: 0.75rem 1rem;
}

.toast-success {
    border-left: 4px solid var(--success-color);
}

.toast-error {
    border-left: 4px solid var(--danger-color);
}

.toast-warning {
    border-left: 4px solid var(--warning-color);
}

.toast-info {
    border-left: 4px solid var(--info-color);
}

/* Error States */
.error-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
}

.error-card {
    text-align: center;
    padding: 3rem 2rem;
}

.error-code {
    font-size: 6rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.error-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.error-description {
    color: var(--secondary-color);
    margin-bottom: 2rem;
}

/* Alerts */
.alert {
    border-radius: var(--border-radius);
    border: none;
    padding: 1rem 1.25rem;
}

.alert-success {
    background-color: rgba(25, 135, 84, 0.1);
    color: var(--success-color);
}

.alert-danger {
    background-color: rgba(220, 53, 69, 0.1);
    color: var(--danger-color);
}

.alert-warning {
    background-color: rgba(255, 193, 7, 0.1);
    color: #997404;
}

.alert-info {
    background-color: rgba(13, 202, 240, 0.1);
    color: #055160;
}

/* Footer */
footer {
    margin-top: auto;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
}

/* Empty States */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
}

.empty-state-icon {
    font-size: 4rem;
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
    opacity: 0.5;
}

.empty-state-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.empty-state-description {
    color: var(--secondary-color);
    margin-bottom: 2rem;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* Utility classes */
.text-truncate-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.text-truncate-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.cursor-pointer {
    cursor: pointer;
}

.no-decoration {
    text-decoration: none;
}

.no-decoration:hover {
    text-decoration: none;
}

/* === RESPONSIVE DESIGN === */

/* Large Desktop (1920px+) */
@media (min-width: 1920px) {
    .container {
        max-width: 1400px;
    }

    .card {
        margin-bottom: 1.5rem;
    }

    .navbar-brand {
        font-size: 1.5rem;
    }

    .btn {
        padding: 0.75rem 1.5rem;
    }
}

/* Desktop (1200px - 1919px) */
@media (min-width: 1200px) and (max-width: 1919px) {
    .container {
        max-width: 1140px;
    }
}

/* Tablet (768px - 1199px) */
@media (min-width: 768px) and (max-width: 1199px) {
    .container {
        max-width: 960px;
    }

    .card {
        margin-bottom: 1rem;
    }

    .toast-container {
        max-width: 300px;
    }
}

/* Mobile (<768px) */
@media (max-width: 767.98px) {
    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    /* Stack columns on mobile */
    .row > .col-md-4,
    .row > .col-md-6,
    .row > .col-md-8 {
        width: 100%;
        margin-bottom: 1rem;
    }

    /* Cards on mobile */
    .card {
        margin-bottom: 1rem;
        border-radius: 6px;
    }

    .card-body {
        padding: 1rem;
    }

    /* Typography on mobile */
    h1 {
        font-size: 1.75rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    h3 {
        font-size: 1.25rem;
    }

    h4 {
        font-size: 1.125rem;
    }

    h5 {
        font-size: 1rem;
    }

    /* Buttons on mobile - full width for primary actions */
    .btn-block-mobile {
        width: 100%;
        margin-bottom: 0.5rem;
    }

    /* Forms on mobile */
    .form-control,
    .form-select {
        font-size: 16px; /* Prevent auto-zoom on iOS */
    }

    /* Navbar on mobile */
    .navbar-collapse {
        background: var(--primary-color);
        padding: 1rem;
        margin-top: 0.5rem;
        border-radius: var(--border-radius);
        box-shadow: var(--shadow);
    }

    .navbar-collapse .nav-link {
        color: white !important;
        padding: 0.75rem 1rem;
        border-radius: 6px;
        margin-bottom: 0.25rem;
    }

    .navbar-collapse .nav-link:hover,
    .navbar-collapse .nav-link:active {
        background-color: rgba(255, 255, 255, 0.15);
    }

    .navbar-nav .nav-item {
        margin-bottom: 0.25rem;
    }

    .dropdown-menu {
        position: static !important;
        transform: none !important;
        border: none;
        box-shadow: none;
        padding-left: 1rem;
    }

    /* Stats cards stack on mobile */
    .stats-row .col-md-4 {
        width: 100%;
        margin-bottom: 0.75rem;
    }

    /* List groups on mobile */
    .list-group-item {
        padding: 0.75rem;
        flex-direction: column;
        align-items: flex-start;
    }

    .list-group-item .d-flex {
        flex-direction: column;
        align-items: flex-start;
    }

    /* Toast notifications on mobile */
    .toast-container {
        left: 1rem;
        right: 1rem;
        max-width: none;
    }

    /* Practice test interface on mobile */
    .progress-bar-container {
        position: sticky;
        top: 0;
        z-index: 100;
        background: white;
        padding: 0.75rem;
        box-shadow: var(--shadow-sm);
    }

    /* Question options on mobile - ensure large touch targets */
    .list-group-item-action {
        padding: 1rem;
        min-height: 48px;
    }

    .form-check-input {
        width: 1.5rem;
        height: 1.5rem;
    }
}

/* Extra Small Mobile (<375px) */
@media (max-width: 374.98px) {
    .container {
        padding-left: 0.75rem;
        padding-right: 0.75rem;
    }

    h1 {
        font-size: 1.5rem;
    }

    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }

    .card-body {
        padding: 0.75rem;
    }
}

/* Touch device optimizations */
@media (hover: none) and (pointer: coarse) {
    /* Increase touch targets for touch devices */
    .btn,
    .list-group-item-action,
    .nav-link {
        min-height: 44px;
        min-width: 44px;
    }

    /* Remove hover effects on touch devices */
    .btn:hover {
        transform: none;
    }

    .card:hover {
        transform: none;
        box-shadow: var(--shadow);
    }
}

/* Print styles */
@media print {
    .navbar,
    footer,
    .btn,
    .toast-container {
        display: none;
    }

    .card {
        box-shadow: none;
        border: 1px solid #dee2e6;
        page-break-inside: avoid;
    }

    body {
        background: white;
    }
}

/* Dark mode support */
[data-bs-theme="dark"] {
    --light-color: #212529;
    --dark-color: #f8f9fa;
}

[data-bs-theme="dark"] .provider-btn {
    background: #2b3035;
    color: #dee2e6;
    border-color: #495057;
}

[data-bs-theme="dark"] .provider-btn:hover {
    background: #343a40;
    color: #dee2e6;
    border-color: #6c757d;
}

[data-bs-theme="dark"] .provider-btn i {
    color: #6ea8fe;
}

[data-bs-theme="dark"] .login-info-box {
    background-color: #0d2137;
    border-color: #1a3a5c;
}

[data-bs-theme="dark"] .login-info-box p {
    color: #b8d4fe;
}

[data-bs-theme="dark"] .login-info-box strong {
    color: #8cb9ff;
}

[data-bs-theme="dark"] .login-info-box i {
    color: #6ea8fe;
}

[data-bs-theme="dark"] .login-help p {
    color: #adb5bd;
}

[data-bs-theme="dark"] .site-footer {
    background: #1a1d20;
    border-top-color: rgba(255, 255, 255, 0.1);
}

[data-bs-theme="dark"] .toast {
    background: #2b3035;
    border-color: rgba(255, 255, 255, 0.1);
    color: #dee2e6;
}

[data-bs-theme="dark"] .toast-header {
    border-bottom-color: rgba(255, 255, 255, 0.1);
    color: #dee2e6;
}

[data-bs-theme="dark"] .review-stat-card {
    background: #2b3035;
}

[data-bs-theme="dark"] .review-option {
    background: #2b3035;
    border-color: #495057;
}

[data-bs-theme="dark"] .review-option-letter {
    background-color: #495057;
    color: #dee2e6;
}

[data-bs-theme="dark"] .review-all-header {
    background: #1a1d20;
    border-bottom-color: #495057;
}

[data-bs-theme="dark"] .review-all-option {
    background: #2b3035;
    border-color: #495057;
}

[data-bs-theme="dark"] .review-all-option-letter {
    background-color: #495057;
    color: #dee2e6;
}

[data-bs-theme="dark"] .floating-action-bar {
    background: #1a1d20;
    box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.4);
    border-top-color: rgba(255, 255, 255, 0.1);
}

[data-bs-theme="dark"] .feedback-details-card {
    background: #2b3035;
    border-color: #495057;
}

[data-bs-theme="dark"] .feedback-detail-row {
    border-bottom-color: #495057;
}

[data-bs-theme="dark"] .feedback-detail-label {
    color: #adb5bd;
}

[data-bs-theme="dark"] .feedback-detail-value {
    color: #dee2e6;
}

[data-bs-theme="dark"] .feedback-success-title {
    color: #dee2e6;
}

[data-bs-theme="dark"] .feedback-success-text {
    color: #adb5bd;
}

[data-bs-theme="dark"] .theme-toggle {
    color: rgba(255, 255, 255, 0.85);
    font-size: 1.15rem;
}

[data-bs-theme="dark"] .theme-toggle:hover {
    color: #ffffff;
}

/* Light mode theme toggle styling */
.theme-toggle {
    color: rgba(255, 255, 255, 0.85);
    font-size: 1.15rem;
    padding: 0.375rem 0.5rem;
    border: none;
    text-decoration: none;
}

.theme-toggle:hover {
    color: #ffffff;
}

.theme-toggle:focus {
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.4);
    border-radius: 4px;
}

/* Delete button in dropdown menu */
.delete-form {
    margin: 0;
}

.delete-form button {
    width: 100%;
    text-align: left;
    border: none;
    background: transparent;
    cursor: pointer;
}

.dropdown-item.text-danger:hover {
    background-color: rgba(220, 53, 69, 0.1);
}

/* Three-dot menu button styling */
.btn-link.text-body-secondary {
    opacity: 0.6;
    transition: opacity 0.2s;
}

.btn-link.text-body-secondary:hover {
    opacity: 1;
}

/* === QUESTION BANK STYLES === */

/* Question type colors added to main :root block above */

/* Question card type differentiation */
.question-card-generated {
    border-left: 4px solid var(--question-generated-color) !important;
}

.question-card-extracted {
    border-left: 4px solid var(--question-extracted-color) !important;
}

/* Question type badges */
.badge-question-generated {
    background-color: var(--question-generated-color);
    color: white;
}

.badge-question-extracted {
    background-color: var(--question-extracted-color);
    color: white;
}

/* Multi-select mode */
.question-card-checkbox {
    display: none;
    position: absolute;
    top: 1rem;
    left: 1rem;
    width: 1.5rem;
    height: 1.5rem;
    cursor: pointer;
    z-index: 10;
}

.question-card-checkbox input[type="checkbox"] {
    width: 1.5rem;
    height: 1.5rem;
    cursor: pointer;
}

/* Multi-select mode active */
.select-mode .question-card-checkbox {
    display: block;
}

.select-mode .question-card-generated .card-body {
    padding-left: 3.5rem; /* Make room for checkbox */
}

/* Lock icon for protected questions */
.question-card-lock {
    display: none;
    position: absolute;
    top: 1rem;
    left: 1rem;
    color: var(--secondary-color);
    opacity: 0.7;
    z-index: 10;
}

.select-mode .question-card-lock {
    display: block;
}

.select-mode .question-card-extracted .card-body {
    padding-left: 3.5rem; /* Make room for lock icon */
}

/* Floating action bar */
.floating-action-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: white;
    box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.15);
    border-top: 1px solid rgba(0, 0, 0, 0.08);
    padding: 1rem;
    z-index: 1000;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.floating-action-bar.show {
    transform: translateY(0);
}

.floating-action-bar .action-bar-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.floating-action-bar .selected-count {
    font-weight: 600;
    color: var(--dark-color);
    flex: 1;
    min-width: 150px;
}

.floating-action-bar .action-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.floating-action-bar .btn {
    min-width: 120px;
}

/* Question bank mobile styles */
@media (max-width: 767.98px) {
    /* Stats cards - 2x2 grid on mobile */
    .question-bank-stats .col-6 {
        margin-bottom: 0.75rem;
    }

    .question-bank-stats .card-body {
        padding: 0.75rem;
    }

    .question-bank-stats h3 {
        font-size: 1.5rem;
    }

    .question-bank-stats .card-text {
        font-size: 0.875rem;
    }

    /* Filter form - collapsible on mobile */
    .filter-toggle-btn {
        width: 100%;
        margin-bottom: 1rem;
    }

    /* Question cards - full width on mobile */
    .question-card {
        margin-bottom: 1rem;
    }

    .question-card .card-body {
        padding: 0.875rem;
    }

    .question-card .card-title {
        font-size: 1rem;
        margin-bottom: 0.5rem;
    }

    .question-card .btn {
        width: 100%;
        margin-top: 0.5rem;
    }

    /* Pagination - larger touch targets */
    .pagination .page-link {
        min-width: 44px;
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .pagination .page-item {
        margin: 0 2px;
    }

    /* Multi-select on mobile */
    .question-card-checkbox {
        width: 1.75rem;
        height: 1.75rem;
    }

    .question-card-checkbox input[type="checkbox"] {
        width: 1.75rem;
        height: 1.75rem;
    }

    /* Floating action bar on mobile */
    .floating-action-bar {
        padding: 0.75rem;
    }

    .floating-action-bar .action-bar-content {
        flex-direction: column;
        gap: 0.75rem;
    }

    .floating-action-bar .selected-count {
        text-align: center;
        min-width: 100%;
    }

    .floating-action-bar .action-buttons {
        width: 100%;
        flex-direction: column;
    }

    .floating-action-bar .btn {
        width: 100%;
        min-width: 100%;
    }
}

/* === PRACTICE TEST STYLES === */

/* Start Test - Topic Tree */
.topic-tree-container {
    max-height: 300px;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

/* Start Test - Topic control buttons row */
.topic-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
    align-items: center;
}

/* Start Test - Topic tree checkboxes need proper touch targets */
.topic-tree-container .form-check {
    min-height: 48px;
    display: flex;
    align-items: center;
}

/* Start Test - Topic tree group titles */
.topic-tree-container > div > strong:first-child,
.topic-tree-container .ms-3 + strong {
    display: block;
    padding-top: 0.5rem;
    margin-top: 0.5rem;
    border-top: 1px solid #e9ecef;
    color: var(--dark-color);
    font-size: 0.9375rem;
}

/* Take Test - Answer options: override global mobile column layout
   The global .list-group-item mobile rule sets flex-direction: column which
   breaks answer options that need radio + text inline */
.take-test-options .list-group-item-action {
    flex-direction: row !important;
    align-items: center;
    gap: 0.75rem;
}

/* Take Test - Question text readability */
.take-test-question-text {
    font-size: 1.125rem;
    line-height: 1.7;
}

/* Take Test - Progress card (sticky behavior added in mobile breakpoint) */
.take-test-progress-card {
    position: static;
}

/* Take Test - Progress card: disable card hover transform so sticky works */
.take-test-progress-card:hover {
    transform: none;
    box-shadow: var(--shadow);
}

/* Mobile Adjustments */
@media (max-width: 767.98px) {
    /* Start Test - Topic tree: use viewport-relative max-height on mobile */
    .topic-tree-container {
        max-height: 50vh;
        max-height: 50dvh;
    }

    /* Start Test - Better spacing between form groups */
    .start-test-form .mb-3,
    .start-test-form .mb-4 {
        margin-bottom: 1.25rem;
    }

    /* Start Test - Topic tree select/deselect buttons full width on small screens */
    .topic-controls .btn-sm {
        flex: 1;
        min-width: 0;
    }

    /* Take Test - Sticky progress bar at top of viewport */
    .take-test-progress-card {
        position: sticky;
        top: 0;
        z-index: 100;
        border-radius: 0;
        border-left: none;
        border-right: none;
        margin-bottom: 0 !important;
        box-shadow: var(--shadow-sm);
    }

    /* Take Test - Answer options: enforce 48px minimum touch target */
    .take-test-options .list-group-item-action {
        min-height: 48px;
        padding: 0.875rem 1rem;
    }

    /* Take Test - Larger radio buttons for answer options on mobile */
    .take-test-options .form-check-input {
        width: 1.375rem;
        height: 1.375rem;
        flex-shrink: 0;
        margin-top: 0;
    }

    /* Take Test - Keep answer letter bold text from wrapping alone */
    .take-test-options .list-group-item-action strong {
        flex-shrink: 0;
    }

    /* Take Test - Submit button top spacing */
    .take-test-submit {
        margin-top: 0.75rem;
    }

    /* Take Test - Info card below question */
    .take-test-info-card {
        margin-top: 0.5rem;
    }
}

/* === REVIEW PAGE STYLES === */

/* Score Ring */
.review-score-card {
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
}

.review-score-ring {
    position: relative;
    width: 160px;
    height: 160px;
    margin: 0 auto;
}

.review-score-value {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    z-index: 2;
}

.review-score-number {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1;
}

.review-score-percent {
    font-size: 1.5rem;
    font-weight: 600;
    opacity: 0.7;
}

.review-score-circle {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.review-score-circle-bg {
    fill: none;
    stroke: #e9ecef;
    stroke-width: 8;
}

.review-score-circle-progress {
    fill: none;
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: 339.292; /* 2 * PI * 54 */
    stroke-dashoffset: calc(339.292 * (1 - var(--score) / 100));
    transition: stroke-dashoffset 1s ease-in-out;
}

/* Score colors */
.review-score-excellent .review-score-number {
    color: #198754;
}

.review-score-excellent .review-score-circle-progress {
    stroke: #198754;
}

.review-score-good .review-score-number {
    color: #0d6efd;
}

.review-score-good .review-score-circle-progress {
    stroke: #0d6efd;
}

.review-score-fair .review-score-number {
    color: #ffc107;
}

.review-score-fair .review-score-circle-progress {
    stroke: #ffc107;
}

.review-score-poor .review-score-number {
    color: #dc3545;
}

.review-score-poor .review-score-circle-progress {
    stroke: #dc3545;
}

/* Stat Cards */
.review-stat-card {
    border: none;
    background: white;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.review-stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.review-stat-card .card-body {
    padding: 1.25rem;
}

.review-stat-icon {
    font-size: 2.5rem;
    margin-right: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.review-stat-success .review-stat-icon {
    color: #198754;
}

.review-stat-danger .review-stat-icon {
    color: #dc3545;
}

.review-stat-info .review-stat-icon {
    color: #0d6efd;
}

.review-stat-warning .review-stat-icon {
    color: #ffc107;
}

.review-stat-card h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    line-height: 1;
}

.review-stat-card .small {
    font-size: 0.875rem;
}

/* Answer List */
.review-answer-item {
    padding: 1rem 1.25rem;
    border-left: 4px solid transparent;
    transition: all 0.2s ease;
}

.review-answer-item:hover {
    background-color: rgba(0, 0, 0, 0.02);
    border-left-color: #0d6efd;
}

.review-answer-number {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.875rem;
    margin-right: 1rem;
    flex-shrink: 0;
}

.review-answer-correct {
    background-color: rgba(25, 135, 84, 0.1);
    color: #198754;
}

.review-answer-incorrect {
    background-color: rgba(220, 53, 69, 0.1);
    color: #dc3545;
}

/* Progress Badge */
.review-progress-badge {
    background: linear-gradient(135deg, #0d6efd 0%, #0a58ca 100%);
    color: white;
    padding: 0.5rem 1.25rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.875rem;
    box-shadow: 0 2px 4px rgba(13, 110, 253, 0.3);
}

/* Question Card */
.review-question-card {
    border: 2px solid rgba(0, 0, 0, 0.08);
}

.review-question-header {
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    border-bottom: 2px solid rgba(0, 0, 0, 0.08);
    padding: 1.25rem;
}

.review-question-text {
    font-size: 1.125rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    color: #212529;
}

/* Options */
.review-options {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.review-option {
    display: flex;
    align-items: center;
    padding: 1rem 1.25rem;
    border: 2px solid #dee2e6;
    border-radius: 8px;
    transition: all 0.2s ease;
    background: white;
}

.review-option-correct {
    border-color: #198754;
    background-color: rgba(25, 135, 84, 0.05);
}

.review-option-incorrect {
    border-color: #dc3545;
    background-color: rgba(220, 53, 69, 0.05);
}

.review-option-letter {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
    margin-right: 1rem;
    flex-shrink: 0;
    background-color: #e9ecef;
    color: #495057;
}

.review-option-correct .review-option-letter {
    background-color: #198754;
    color: white;
}

.review-option-incorrect .review-option-letter {
    background-color: #dc3545;
    color: white;
}

.review-option-text {
    flex: 1;
    font-size: 1rem;
    line-height: 1.5;
}

.review-option-indicator {
    margin-left: 1rem;
    font-size: 1.5rem;
}

/* Explanation Section */
.review-explanation-card {
    border-left: 4px solid #0d6efd;
}

.review-explanation-section,
.review-reference-section {
    margin: 0;
}

.review-explanation-title,
.review-reference-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: #212529;
}

.review-explanation-text,
.review-reference-text {
    font-size: 0.95rem;
    line-height: 1.6;
    color: #495057;
    margin-bottom: 0;
}

/* Mobile Adjustments */
@media (max-width: 767.98px) {
    .review-score-ring {
        width: 140px;
        height: 140px;
    }

    .review-score-number {
        font-size: 2.5rem;
    }

    .review-score-percent {
        font-size: 1.25rem;
    }

    .review-stat-card h3 {
        font-size: 1.5rem;
    }

    .review-stat-icon {
        font-size: 2rem;
        margin-right: 0.75rem;
    }

    .review-answer-item {
        padding: 0.875rem 1rem;
    }

    .review-answer-number {
        width: 32px;
        height: 32px;
        font-size: 0.75rem;
    }

    .review-progress-badge {
        font-size: 0.75rem;
        padding: 0.375rem 0.875rem;
    }

    .review-question-text {
        font-size: 1rem;
    }

    .review-option {
        padding: 0.875rem 1rem;
    }

    .review-option-letter {
        width: 36px;
        height: 36px;
        font-size: 0.875rem;
        margin-right: 0.75rem;
    }

    .review-option-text {
        font-size: 0.9375rem;
    }

    .review-option-indicator {
        font-size: 1.25rem;
        margin-left: 0.5rem;
    }
}

/* === REVIEW ALL PAGE STYLES === */

/* Sticky Header */
.review-all-header {
    background: white;
    padding: 1rem 0;
    margin-bottom: 1.5rem;
    border-bottom: 2px solid #e9ecef;
    z-index: 100;
}

.review-all-score {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.review-all-score-label {
    font-size: 0.875rem;
    color: #6c757d;
}

.review-all-score-value {
    font-size: 1.5rem;
    font-weight: 700;
}

/* Filters */
.review-all-filters {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.review-filter-btn {
    padding: 0.5rem 1rem;
    border: 2px solid #dee2e6;
    background: white;
    border-radius: 50px;
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.review-filter-btn:hover {
    border-color: #0d6efd;
    background-color: rgba(13, 110, 253, 0.05);
}

.review-filter-btn.active {
    background: #0d6efd;
    color: white;
    border-color: #0d6efd;
}

/* Quick Jump Grid */
.review-quick-jump {
    margin-top: 1rem;
}

.review-quick-jump-label {
    font-size: 0.875rem;
    color: #6c757d;
    font-weight: 500;
    display: block;
    margin-bottom: 0.5rem;
}

.review-quick-jump-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.review-quick-jump-pill {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    text-decoration: none;
    transition: all 0.2s ease;
}

.review-quick-jump-pill.correct {
    background-color: rgba(25, 135, 84, 0.1);
    color: #198754;
    border: 2px solid rgba(25, 135, 84, 0.3);
}

.review-quick-jump-pill.incorrect {
    background-color: rgba(220, 53, 69, 0.1);
    color: #dc3545;
    border: 2px solid rgba(220, 53, 69, 0.3);
}

.review-quick-jump-pill:hover {
    transform: scale(1.1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

/* Question Cards */
.review-all-question-card {
    border: 2px solid #dee2e6;
    transition: all 0.2s ease;
}

.review-all-question-card.question-correct {
    border-left: 4px solid #198754;
}

.review-all-question-card.question-incorrect {
    border-left: 4px solid #dc3545;
}

.review-all-question-header {
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    cursor: pointer;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid #dee2e6;
    transition: background-color 0.2s ease;
}

.review-all-question-header:hover {
    background-color: rgba(0, 0, 0, 0.02);
}

.review-all-question-number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 0.875rem;
}

.review-collapse-icon {
    transition: transform 0.3s ease;
    font-size: 1.25rem;
}

.review-all-question-text {
    font-size: 1.0625rem;
    line-height: 1.6;
    margin-bottom: 1rem;
    color: #212529;
}

/* Options */
.review-all-options {
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
}

.review-all-option {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    border: 1px solid #dee2e6;
    border-radius: 6px;
    background: white;
}

.review-all-option-correct {
    border-color: #198754;
    background-color: rgba(25, 135, 84, 0.05);
}

.review-all-option-incorrect {
    border-color: #dc3545;
    background-color: rgba(220, 53, 69, 0.05);
}

.review-all-option-letter {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #e9ecef;
    color: #495057;
    font-weight: 700;
    font-size: 0.875rem;
    margin-right: 0.875rem;
    flex-shrink: 0;
}

.review-all-option-correct .review-all-option-letter {
    background-color: #198754;
    color: white;
}

.review-all-option-incorrect .review-all-option-letter {
    background-color: #dc3545;
    color: white;
}

.review-all-option-text {
    flex: 1;
    font-size: 0.9375rem;
    line-height: 1.5;
}

/* Meta Section */
.review-all-meta {
    padding-top: 1rem;
    border-top: 1px solid #e9ecef;
}

.review-all-explanation,
.review-all-reference {
    font-size: 0.9375rem;
    line-height: 1.6;
}

.review-all-explanation h6,
.review-all-reference h6 {
    margin-bottom: 0.5rem;
}

/* Mobile Adjustments */
@media (max-width: 767.98px) {
    .review-all-header {
        padding: 0.75rem 0;
    }

    .review-all-score-label {
        font-size: 0.75rem;
    }

    .review-all-score-value {
        font-size: 1.25rem;
    }

    .review-filter-btn {
        padding: 0.375rem 0.875rem;
        font-size: 0.8125rem;
    }

    .review-quick-jump-pill {
        width: 32px;
        height: 32px;
        font-size: 0.75rem;
    }

    .review-all-question-number {
        width: 36px;
        height: 36px;
        font-size: 0.75rem;
    }

    .review-all-question-header h6 {
        font-size: 0.9375rem;
    }

    .review-all-question-text {
        font-size: 1rem;
    }

    .review-all-option {
        padding: 0.625rem 0.875rem;
    }

    .review-all-option-letter {
        width: 28px;
        height: 28px;
        font-size: 0.75rem;
        margin-right: 0.625rem;
    }

    .review-all-option-text {
        font-size: 0.875rem;
    }

    .review-all-explanation,
    .review-all-reference {
        font-size: 0.875rem;
    }

    /* Filters - horizontal scroll on mobile */
    .review-all-filters {
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        padding-bottom: 0.25rem;
    }

    .review-all-filters::-webkit-scrollbar {
        display: none;
    }

    /* Question card headers - touch targets */
    .review-all-question-header {
        padding: 0.875rem 1rem;
        min-height: 52px;
    }
}

/* Very Small Screens (< 360px) */
@media (max-width: 359.98px) {
    /* Results page - score ring */
    .review-score-ring {
        width: 110px;
        height: 110px;
    }

    .review-score-number {
        font-size: 2rem;
    }

    .review-score-percent {
        font-size: 1rem;
    }

    /* Results page - stats grid single column */
    .review-stats-grid .col-6 {
        width: 100%;
    }

    .review-stat-card h3 {
        font-size: 1.25rem;
    }

    .review-stat-icon {
        font-size: 1.5rem;
        margin-right: 0.5rem;
    }

    .review-stat-card .card-body {
        padding: 0.875rem;
    }

    /* Review-all - smaller pills */
    .review-quick-jump-pill {
        width: 28px;
        height: 28px;
        font-size: 0.6875rem;
    }

    .review-quick-jump-grid {
        gap: 0.375rem;
    }
}

/* Results action buttons - stack on mobile */
.review-results-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

@media (max-width: 767.98px) {
    .review-results-actions {
        flex-direction: column;
    }

    .review-results-actions .btn {
        width: 100%;
    }
}

/* === GENERATION === */

/* --- Generate Form --- */

/* Topic tree scrollable container (shared with start_test) */
.generate-topic-tree {
    max-height: 300px;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

/* Generate form controls: ensure proper min-height for touch */
.generate-form .form-control,
.generate-form .form-select {
    min-height: 44px;
}

/* --- Generating (Live Progress) --- */

/* Progress bar for generation */
.generating-progress .progress {
    height: 25px;
    font-size: 0.875rem;
    line-height: 25px;
}

/* Progress message readability */
.generating-progress .progress-message {
    font-size: 1rem;
    min-height: 1.5rem;
}

/* Spinner sizing */
.generating-progress .spinner-border {
    width: 3rem;
    height: 3rem;
}

/* Generation status containers */
.generating-status-text {
    font-size: 0.9375rem;
    line-height: 1.5;
}

/* --- Mobile Adjustments for Generation --- */
@media (max-width: 767.98px) {
    /* Filter panel toggle: prominent mobile button */
    .filter-toggle-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
        width: 100%;
        min-height: 48px;
        font-size: 1rem;
        font-weight: 600;
        padding: 0.75rem 1rem;
    }

    /* Stats cards: ensure clean 2x2 grid on mobile */
    .question-bank-stats .card {
        border-radius: 8px;
    }

    .question-bank-stats .card-body {
        padding: 0.625rem 0.5rem;
    }

    .question-bank-stats .card-title {
        font-size: 1.25rem;
        margin-bottom: 0;
    }

    .question-bank-stats .card-text {
        font-size: 0.75rem;
        margin-bottom: 0;
    }

    /* Question cards: 44px+ touch targets for checkboxes */
    .question-card-checkbox {
        width: 44px !important;
        height: 44px !important;
        display: flex;
        align-items: center;
        justify-content: center;
        top: 0.75rem;
        left: 0.75rem;
    }

    .question-card-checkbox input[type="checkbox"] {
        width: 22px !important;
        height: 22px !important;
        cursor: pointer;
    }

    /* Extra left padding for checkbox in select mode */
    .select-mode .question-card-generated .card-body,
    .select-mode .question-card-extracted .card-body {
        padding-left: 3.75rem;
    }

    /* Lock icon: proper touch target area */
    .question-card-lock {
        width: 44px;
        height: 44px;
        display: flex !important;
        align-items: center;
        justify-content: center;
        top: 0.75rem;
        left: 0.75rem;
        font-size: 1.25rem;
    }

    /* Hide lock icon outside select mode on mobile too */
    .question-card-lock {
        display: none !important;
    }

    .select-mode .question-card-lock {
        display: flex !important;
    }

    /* Floating action bar: improved mobile layout */
    .floating-action-bar {
        padding: 0.75rem 1rem;
        padding-bottom: calc(0.75rem + env(safe-area-inset-bottom, 0px));
    }

    .floating-action-bar .selected-count {
        font-size: 1rem;
        padding: 0.25rem 0;
    }

    .floating-action-bar .action-buttons .btn {
        min-height: 44px;
        font-size: 0.9375rem;
    }

    /* Generate form: topic tree viewport-relative height */
    .generate-topic-tree {
        max-height: 50vh;
        max-height: 50dvh;
    }

    /* Generate form: larger touch targets for topic checkboxes */
    .generate-topic-tree .form-check {
        min-height: 48px;
        display: flex;
        align-items: center;
        padding: 0.25rem 0;
    }

    .generate-topic-tree .form-check-input {
        width: 1.375rem;
        height: 1.375rem;
        flex-shrink: 0;
        margin-top: 0;
    }

    .generate-topic-tree .form-check-label {
        padding-left: 0.25rem;
    }

    /* Generate form: topic group separators */
    .generate-topic-tree > .mb-3 > strong:first-child {
        display: block;
        padding-top: 0.625rem;
        margin-top: 0.25rem;
        border-top: 1px solid #e9ecef;
        font-size: 0.9375rem;
        color: var(--dark-color);
    }

    /* Generate form: select/deselect buttons full width on small screens */
    .generate-topic-controls .btn-sm {
        flex: 1;
        min-width: 0;
    }

    /* Generating page: progress readability on small screens */
    .generating-progress .progress {
        height: 20px;
        font-size: 0.8125rem;
        line-height: 20px;
    }

    .generating-progress .spinner-border {
        width: 2.5rem;
        height: 2.5rem;
    }

    .generating-progress h5 {
        font-size: 1.125rem;
    }

    .generating-progress .generating-status-text {
        font-size: 0.875rem;
    }

    /* Error/success containers on generating page */
    .generating-result-container .btn {
        min-height: 44px;
    }
}

/* === DOCUMENTS === */

/* --- Document List --- */

/* Sticky filter/search card on mobile */
@media (max-width: 767.98px) {
    .doc-filter-card {
        position: sticky;
        top: 56px; /* navbar height */
        z-index: 1020;
        border-radius: 0;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
        margin-left: -0.75rem;
        margin-right: -0.75rem;
        margin-bottom: 1rem;
    }

    .doc-filter-card .card-body {
        padding: 0.75rem;
    }
}

/* Horizontal scroll for filter badges / action bar on mobile */
.doc-filter-scroll {
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.doc-filter-scroll::-webkit-scrollbar {
    display: none;
}

.doc-filter-field {
    min-width: 140px;
}

.doc-filter-field-wide {
    min-width: 160px;
}

/* Document cards */
.doc-card {
    transition: box-shadow 0.2s ease, transform 0.15s ease;
}

.doc-card:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

/* Status badges — legible on small screens */
.doc-status-badge {
    font-size: 0.75rem;
    padding: 0.3em 0.6em;
    line-height: 1.3;
    white-space: nowrap;
}

/* Action buttons — ensure 44px+ touch targets on mobile */
.doc-card-actions .dropdown-toggle {
    min-width: 44px;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.375rem;
}

.doc-card-actions .dropdown-item {
    padding: 0.6rem 1rem;
    min-height: 44px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.doc-card-actions .dropdown-item i {
    font-size: 1rem;
    width: 1.25rem;
    text-align: center;
}

/* Card footer CTA */
.doc-card-footer .btn {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* Empty state inbox icon */
.doc-empty-icon {
    font-size: 3rem;
    color: #adb5bd;
}

@media (max-width: 767.98px) {
    .doc-empty-icon {
        font-size: 2.5rem;
    }
}

/* --- Card Progress (document processing) --- */
.doc-card-progress .progress {
    height: 6px;
    border-radius: 3px;
}

.doc-card-progress .progress-bar {
    min-width: 1rem;
}

/* --- Upload Page --- */

/* Drop zone — mobile-friendly */
.doc-drop-zone {
    border: 3px dashed #0d6efd;
    border-radius: 12px;
    padding: 2.5rem 1rem;
    text-align: center;
    background-color: #f8f9fa;
    transition: all 0.2s ease;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    min-height: 180px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.doc-drop-zone:hover,
.doc-drop-zone:focus-within {
    background-color: #e7f1ff;
    border-color: #0a58ca;
}

.doc-drop-zone.dragover {
    background-color: #e7f1ff;
    border-color: #0a58ca;
    transform: scale(1.02);
}

/* Touch feedback for mobile tap */
.doc-drop-zone:active {
    background-color: #d0e2ff;
    border-color: #084298;
    transform: scale(0.99);
}

.doc-drop-zone i {
    font-size: 3rem;
    color: #0d6efd;
    margin-bottom: 0.75rem;
}

@media (max-width: 767.98px) {
    .doc-drop-zone {
        padding: 2rem 0.75rem;
        min-height: 160px;
    }

    .doc-drop-zone i {
        font-size: 2.5rem;
    }

    /* Larger tap area on the whole drop zone */
    .doc-drop-zone h4,
    .doc-drop-zone p {
        pointer-events: none;
    }
}

/* File list items — swipe-friendly */
.doc-file-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background-color: #f8f9fa;
    border-radius: 8px;
    margin-bottom: 0.5rem;
    min-height: 52px;
    gap: 0.5rem;
}

.doc-file-item .file-info {
    flex: 1;
    min-width: 0;
    overflow: hidden;
}

.doc-file-item .file-name {
    font-weight: 500;
    display: block;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.doc-file-item .file-size {
    color: #6c757d;
    font-size: 0.85rem;
}

.doc-file-item .remove-file {
    color: #dc3545;
    cursor: pointer;
    font-size: 1.4rem;
    line-height: 1;
    flex-shrink: 0;
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background-color 0.15s ease;
    -webkit-tap-highlight-color: transparent;
}

.doc-file-item .remove-file:hover {
    background-color: rgba(220, 53, 69, 0.1);
}

.doc-file-item .remove-file:active {
    background-color: rgba(220, 53, 69, 0.2);
}

/* Document type selection cards */
.doc-type-card {
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    border: 2px solid transparent;
    -webkit-tap-highlight-color: transparent;
}

.doc-type-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.doc-type-card.selected {
    border-color: #0d6efd;
    background-color: #e7f1ff;
}

.doc-type-card input[type="radio"] {
    display: none;
}

.doc-type-card .card-body {
    padding: 1.25rem;
}

@media (max-width: 767.98px) {
    .doc-type-card .card-body {
        padding: 1rem;
    }

    .doc-type-card .bi {
        font-size: 1.75rem !important;
    }
}

/* Form controls — proper mobile sizing */
@media (max-width: 767.98px) {
    #upload-form .form-select,
    #upload-form .form-control {
        min-height: 48px;
        font-size: 16px; /* prevents iOS zoom */
    }
}

/* Hidden file input */
.doc-drop-zone input[type="file"] {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* === FEEDBACK SUCCESS PAGE STYLES === */

.feedback-success-card {
    border: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.feedback-success-icon {
    display: flex;
    justify-content: center;
    align-items: center;
}

.feedback-success-circle {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: linear-gradient(135deg, #198754 0%, #146c43 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    box-shadow: 0 4px 12px rgba(25, 135, 84, 0.3);
    animation: feedbackSuccessPulse 1.5s ease-in-out;
}

@keyframes feedbackSuccessPulse {
    0% {
        transform: scale(0);
        opacity: 0;
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.feedback-success-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: #212529;
}

.feedback-success-text {
    font-size: 1.0625rem;
    line-height: 1.6;
    color: #6c757d;
}

.feedback-details-card {
    background: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: 8px;
    overflow: hidden;
    text-align: left;
    margin-bottom: 1rem;
}

.feedback-details-header {
    background: linear-gradient(135deg, #0d6efd 0%, #0a58ca 100%);
    color: white;
    padding: 0.875rem 1.25rem;
    font-weight: 600;
    font-size: 1rem;
}

.feedback-details-body {
    padding: 1.25rem;
}

.feedback-detail-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 0.75rem 0;
    border-bottom: 1px solid #dee2e6;
}

.feedback-detail-row:last-child {
    border-bottom: none;
}

.feedback-detail-label {
    font-weight: 600;
    color: #495057;
    margin-right: 1rem;
    min-width: 140px;
}

.feedback-detail-value {
    flex: 1;
    color: #212529;
    text-align: right;
}

.feedback-info-note {
    padding-top: 1rem;
    border-top: 1px solid #e9ecef;
}

/* Mobile Adjustments */
@media (max-width: 767.98px) {
    .feedback-success-circle {
        width: 80px;
        height: 80px;
        font-size: 2.5rem;
    }

    .feedback-success-title {
        font-size: 1.5rem;
    }

    .feedback-success-text {
        font-size: 1rem;
    }

    .feedback-details-header {
        padding: 0.75rem 1rem;
        font-size: 0.9375rem;
    }

    .feedback-details-body {
        padding: 1rem;
    }

    .feedback-detail-row {
        flex-direction: column;
        align-items: flex-start;
        padding: 0.625rem 0;
    }

    .feedback-detail-label {
        margin-bottom: 0.25rem;
        min-width: auto;
    }

    .feedback-detail-value {
        text-align: left;
    }
}

/* === CONFIG === */
/* Settings / Provider Configuration page — accordion form styles */

/* Section cards */
.config-section {
    margin-bottom: 1.5rem;
}

/* Accordion header — clickable, pointer cursor, nice hover */
.config-section .card-header {
    cursor: pointer;
    user-select: none;
    transition: background-color 0.15s ease;
}

.config-section .card-header:hover {
    background-color: rgba(0, 0, 0, 0.03);
}

/* Section icon color */
.section-icon {
    margin-right: 0.5rem;
    color: var(--primary-color);
}

/* Form field wrapper — label + input + help text */
.config-field {
    margin-bottom: 1.25rem;
}

.config-field label,
.config-field .form-label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.config-field small {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.875rem;
    color: #6c757d;
}

/* Chevron rotation on collapsed sections — driven by JS adding .rotated */
.config-section .card-header .bi-chevron-down {
    transition: transform 0.2s ease;
}

.config-section .card-header .bi-chevron-down.rotated {
    transform: rotate(-90deg);
}

/* Action buttons row */
.config-actions {
    display: flex;
    gap: 0.75rem;
}

/* ---- Mobile overrides ---- */
@media (max-width: 767.98px) {
    /* Accordion headers: larger touch target */
    .config-section .card-header {
        min-height: 56px;
        padding: 0.875rem 1rem;
    }

    .config-section .card-header h5 {
        font-size: 1rem;
    }

    /* Hide descriptive subtitle on small screens to save space */
    .config-section .card-header .text-body-secondary:not(.section-icon) {
        display: none;
    }

    /* Chevron easier to tap */
    .config-section .card-header .bi-chevron-down {
        font-size: 1.125rem;
    }

    /* All form controls meet 44px touch target */
    .config-section .form-control,
    .config-section .form-select {
        min-height: 44px;
        font-size: 16px; /* prevents iOS zoom on focus */
    }

    /* Form check (switches) also meets touch target */
    .config-section .form-check-input {
        min-height: 24px;
        min-width: 48px;
    }

    .config-section .form-check {
        min-height: 44px;
        padding-top: 0.375rem;
    }

    /* More breathing room between field groups */
    .config-field {
        margin-bottom: 1.5rem;
    }

    /* Pipeline sub-cards tighter on mobile */
    .config-section .card.mb-3 {
        margin-bottom: 1rem;
    }

    .config-section .card.mb-3 .card-header {
        padding: 0.75rem 1rem;
    }

    .config-section .card.mb-3 .card-body {
        padding: 1rem;
    }

    /* Row children stack with spacing */
    .config-section .row > [class*="col-"] {
        margin-bottom: 0.5rem;
    }

    /* Action buttons full width on mobile */
    .config-actions {
        flex-direction: column;
    }

    .config-actions .btn {
        width: 100%;
        justify-content: center;
        min-height: 48px;
    }

    /* Page title area */
    .config-page-header h1 {
        font-size: 1.25rem;
    }
}

/* === LOADING SKELETONS === */

.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: 0.375rem;
    color: transparent !important;
}

.skeleton-text {
    height: 1em;
    margin-bottom: 0.5rem;
}

.skeleton-text.short {
    width: 60%;
}

.skeleton-title {
    height: 1.5em;
    width: 40%;
    margin-bottom: 0.75rem;
}

.skeleton-card {
    height: 120px;
    margin-bottom: 1rem;
}

.skeleton-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Dark mode skeleton */
[data-bs-theme="dark"] .skeleton {
    background: linear-gradient(90deg, #3a3a3a 25%, #4a4a4a 50%, #3a3a3a 75%);
    background-size: 200% 100%;
}

/* === SKIP TO CONTENT (Accessibility) === */
.skip-to-content {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 0 0 8px 8px;
    z-index: 10000;
    font-weight: 600;
    text-decoration: none;
    transition: top 0.2s ease;
}

.skip-to-content:focus {
    top: 0;
    outline: 3px solid white;
    outline-offset: 2px;
}

/* === COMPREHENSIVE DARK MODE FIXES === */

/* Loading overlay */
[data-bs-theme="dark"] .loading-overlay {
    background-color: rgba(33, 37, 41, 0.9);
}

/* Login card already handled above, but login-card hover was a no-op — leave it */

/* Card general — ensure card borders adapt */
[data-bs-theme="dark"] .card {
    border-color: rgba(255, 255, 255, 0.1);
}

[data-bs-theme="dark"] .card-header {
    border-bottom-color: rgba(255, 255, 255, 0.1);
    background-color: rgba(255, 255, 255, 0.03);
}

/* Doc filter card */
[data-bs-theme="dark"] .doc-filter-card {
    background: var(--bs-body-bg);
    border-color: rgba(255, 255, 255, 0.1);
}

/* Dashboard charts — canvas containers */
[data-bs-theme="dark"] .progress-dashboard canvas {
    filter: none;
}

/* Review score card gradient */
[data-bs-theme="dark"] .review-score-card {
    background: linear-gradient(135deg, #1a1d20 0%, #2b3035 100%);
}

/* Take test progress card */
[data-bs-theme="dark"] .take-test-progress-card {
    background: #2b3035;
    border-color: rgba(255, 255, 255, 0.1);
}

/* Take test options */
[data-bs-theme="dark"] .take-test-options .list-group-item {
    background: #2b3035;
    border-color: rgba(255, 255, 255, 0.1);
    color: var(--bs-body-color);
}

[data-bs-theme="dark"] .take-test-options .list-group-item:hover {
    background: #343a40;
    color: var(--bs-body-color);
}

/* Question card */
[data-bs-theme="dark"] .question-card {
    background: var(--bs-body-bg);
    border-color: rgba(255, 255, 255, 0.1);
}

/* Generation page cards */
[data-bs-theme="dark"] .generation-status-card {
    background: #2b3035;
}

/* Coverage map cards */
[data-bs-theme="dark"] .coverage-map .card {
    border-color: rgba(255, 255, 255, 0.1);
}

/* Session list items */
[data-bs-theme="dark"] .list-group-item {
    background: var(--bs-body-bg);
    border-color: rgba(255, 255, 255, 0.1);
    color: var(--bs-body-color);
}

[data-bs-theme="dark"] .list-group-item:hover {
    background: #343a40;
}

/* Config page */
[data-bs-theme="dark"] .config-card {
    background: #2b3035;
    border-color: rgba(255, 255, 255, 0.1);
}

/* Celery monitor */
[data-bs-theme="dark"] .celery-dashboard {
    background: #1a1d20;
}

/* HTMX indicator */
[data-bs-theme="dark"] .htmx-indicator {
    border-color: rgba(255, 255, 255, 0.3);
    border-right-color: transparent;
}

/* Exam questions validation grid */
[data-bs-theme="dark"] .eq-card {
    background: #2b3035;
    border-color: rgba(255, 255, 255, 0.1);
}

/* Document detail scrollable content */
[data-bs-theme="dark"] .doc-content-scroll {
    background: #1a1d20;
    color: var(--bs-body-color);
}

/* Upload type selection cards */
[data-bs-theme="dark"] .upload-type-card {
    background: #2b3035;
    border-color: rgba(255, 255, 255, 0.1);
}

[data-bs-theme="dark"] .upload-type-card:hover {
    background: #343a40;
}

/* Gazette import */
[data-bs-theme="dark"] .gazette-card {
    background: #2b3035;
    border-color: rgba(255, 255, 255, 0.1);
}

/* Section tree */
[data-bs-theme="dark"] .section-tree {
    background: var(--bs-body-bg);
}

/* Stats cards (question bank, dashboard, home) */
[data-bs-theme="dark"] .stat-card,
[data-bs-theme="dark"] .question-bank-stats .card {
    background: #2b3035;
    border-color: rgba(255, 255, 255, 0.1);
}

/* Filter form cards */
[data-bs-theme="dark"] .filter-toggle-btn {
    border-color: rgba(255, 255, 255, 0.2);
    color: var(--bs-body-color);
}

/* Ensure badge text visible in dark mode */
[data-bs-theme="dark"] .bg-warning.text-dark {
    color: #212529 !important;
}

/* Form elements in dark mode — improve borders */
[data-bs-theme="dark"] .form-control,
[data-bs-theme="dark"] .form-select {
    border-color: rgba(255, 255, 255, 0.15);
    background-color: #2b3035;
    color: var(--bs-body-color);
}

/* ============================================= */
/* === GENERATE PAGE REDESIGN === */
/* ============================================= */

.generate-page .generate-page-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--bs-primary) 0%, #7c3aed 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.generate-card {
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
    overflow: hidden;
}

.generate-card > .card-header {
    background: #f8f9fa;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    padding: 0.875rem 1.25rem;
    font-weight: 600;
    font-size: 0.9375rem;
    color: var(--bs-body-color);
}

/* Topic chips — the big redesign */
.generate-topic-tree {
    max-height: 420px;
    overflow-y: auto;
    padding: 0.5rem;
    scrollbar-width: thin;
    scrollbar-color: rgba(0, 0, 0, 0.15) transparent;
}

.generate-topic-tree::-webkit-scrollbar {
    width: 5px;
}

.generate-topic-tree::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.15);
    border-radius: 4px;
}

.topic-group {
    margin-bottom: 1rem;
    padding: 0.75rem;
    background: var(--bs-body-bg, #fff);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 10px;
}

.topic-group-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1rem;
    color: var(--bs-body-color, #212529);
    padding: 0.5rem 0.75rem;
    background: linear-gradient(135deg, rgba(13, 110, 253, 0.08) 0%, rgba(13, 110, 253, 0.03) 100%);
    border-radius: 8px;
    margin-bottom: 0.625rem;
    border-left: 3px solid var(--bs-primary);
}

.topic-group-header i {
    font-size: 1rem;
    color: var(--bs-primary);
}

.topic-group-toggle {
    font-size: 0.75rem;
    color: var(--bs-primary);
    text-decoration: none;
}

.topic-group-toggle:hover {
    text-decoration: underline;
}

.topic-group-items {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
    padding-left: 0.75rem;
}

/* The chip itself */
.topic-chip {
    position: relative;
    display: inline-flex;
    align-items: center;
    cursor: pointer;
    user-select: none;
}

.topic-chip input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.topic-chip-label {
    display: inline-block;
    padding: 0.3rem 0.75rem;
    border-radius: 20px;
    border: 1px solid #dee2e6;
    background: #fff;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--bs-body-color);
    transition: all 0.15s ease;
    line-height: 1.4;
}

.topic-chip:hover .topic-chip-label {
    border-color: var(--bs-primary);
    background: rgba(var(--bs-primary-rgb), 0.04);
}

.topic-chip.selected .topic-chip-label,
.topic-chip input:checked + .topic-chip-label {
    background: var(--bs-primary);
    border-color: var(--bs-primary);
    color: #fff;
}

.topic-chip input:focus-visible + .topic-chip-label {
    outline: 2px solid var(--bs-primary);
    outline-offset: 2px;
}

/* Topic controls bar */
.generate-topic-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 0.625rem 0.875rem;
    background: #f8f9fa;
    border-radius: 8px;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.topic-filter-mode {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.8125rem;
}

.topic-filter-mode-label {
    color: var(--bs-body-secondary);
    font-weight: 500;
    margin-right: 0.25rem;
}

.generate-topic-count {
    font-size: 0.75rem;
    font-weight: 600;
}

/* Generate submit button */
.generate-submit-btn {
    border-radius: 10px;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    box-shadow: 0 2px 8px rgba(var(--bs-primary-rgb), 0.3);
    transition: all 0.2s ease;
}

.generate-submit-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(var(--bs-primary-rgb), 0.4);
}

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

/* ============================================= */
/* === GLOBAL POLISH IMPROVEMENTS === */
/* ============================================= */

/* Stat cards — add left border accent */
.practice-home .stat-card {
    border-radius: 10px;
    border: 1px solid rgba(0, 0, 0, 0.06);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    transition: all 0.2s ease;
    overflow: hidden;
    position: relative;
}

.practice-home .stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    border-radius: 4px 0 0 4px;
}

.practice-home .stat-card:nth-child(1) .card,
.practice-home .stats-row .col-md-4:nth-child(1) .stat-card::before {
    background: var(--bs-primary);
}

.practice-home .stats-row .col-md-4:nth-child(2) .stat-card::before {
    background: var(--bs-success);
}

.practice-home .stats-row .col-md-4:nth-child(3) .stat-card::before {
    background: var(--bs-info);
}

.practice-home .stat-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transform: translateY(-2px);
}

/* Card headers — subtle accent globally */
.card > .card-header {
    font-size: 0.9375rem;
    font-weight: 600;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

/* Sidebar cards — more polished */
.sidebar-section .card {
    border-radius: 10px;
    border: 1px solid rgba(0, 0, 0, 0.06);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.sidebar-section .card-header {
    background: #f8f9fa;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    padding: 0.75rem 1rem;
}

/* Action buttons — more polished */
.action-btn {
    border-radius: 10px;
    font-weight: 600;
    padding: 0.625rem 1.25rem;
    box-shadow: 0 2px 6px rgba(var(--bs-primary-rgb), 0.2);
    transition: all 0.2s ease;
}

.action-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 10px rgba(var(--bs-primary-rgb), 0.3);
}

/* Recent tests list — better hover */
.list-group-item.list-group-item-action {
    border-radius: 8px;
    margin-bottom: 0.375rem;
    border: 1px solid rgba(0, 0, 0, 0.06);
    transition: all 0.15s ease;
}

.list-group-item.list-group-item-action:hover {
    border-color: rgba(var(--bs-primary-rgb), 0.2);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

/* Form controls — subtle custom styling */
.form-control:focus,
.form-select:focus {
    border-color: var(--bs-primary);
    box-shadow: 0 0 0 3px rgba(var(--bs-primary-rgb), 0.1);
}

/* Better badges */
.badge {
    font-weight: 600;
    letter-spacing: 0.02em;
}

/* ============================================= */
/* === GENERATE PAGE DARK MODE === */
/* ============================================= */

[data-bs-theme="dark"] .generate-card {
    background: #1e2125;
    border-color: rgba(255, 255, 255, 0.08);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

[data-bs-theme="dark"] .generate-card > .card-header {
    background: #16191c;
    border-bottom-color: rgba(255, 255, 255, 0.06);
}

[data-bs-theme="dark"] .generate-page-icon {
    background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
}

[data-bs-theme="dark"] .topic-chip-label {
    background: #2b3035;
    border-color: rgba(255, 255, 255, 0.12);
    color: var(--bs-body-color);
}

[data-bs-theme="dark"] .topic-chip:hover .topic-chip-label {
    border-color: rgba(var(--bs-primary-rgb), 0.5);
    background: rgba(var(--bs-primary-rgb), 0.1);
}

[data-bs-theme="dark"] .topic-chip.selected .topic-chip-label,
[data-bs-theme="dark"] .topic-chip input:checked + .topic-chip-label {
    background: var(--bs-primary);
    border-color: var(--bs-primary);
    color: #fff;
}

[data-bs-theme="dark"] .topic-group {
    background: var(--bs-body-bg);
    border-color: rgba(255, 255, 255, 0.1);
}

[data-bs-theme="dark"] .topic-group-header {
    color: var(--bs-body-color);
    background: linear-gradient(135deg, rgba(13, 110, 253, 0.15) 0%, rgba(13, 110, 253, 0.05) 100%);
    border-left-color: var(--bs-primary);
}

[data-bs-theme="dark"] .generate-topic-controls {
    background: #16191c;
    border-color: rgba(255, 255, 255, 0.06);
}

[data-bs-theme="dark"] .generate-topic-tree {
    scrollbar-color: rgba(255, 255, 255, 0.15) transparent;
}

[data-bs-theme="dark"] .generate-topic-tree::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
}

/* Stat card dark mode accent bars */
[data-bs-theme="dark"] .practice-home .stat-card {
    background: #1e2125;
    border-color: rgba(255, 255, 255, 0.08);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

[data-bs-theme="dark"] .practice-home .stat-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

/* Sidebar dark mode */
[data-bs-theme="dark"] .sidebar-section .card {
    background: #1e2125;
    border-color: rgba(255, 255, 255, 0.08);
}

[data-bs-theme="dark"] .sidebar-section .card-header {
    background: #16191c;
    border-bottom-color: rgba(255, 255, 255, 0.06);
}

/* List group items dark mode */
[data-bs-theme="dark"] .list-group-item.list-group-item-action {
    background: #1e2125;
    border-color: rgba(255, 255, 255, 0.08);
}

[data-bs-theme="dark"] .list-group-item.list-group-item-action:hover {
    background: #2b3035;
    border-color: rgba(var(--bs-primary-rgb), 0.3);
}

/* === Active nav link highlighting === */
.navbar .nav-link.active {
    color: #fff !important;
    font-weight: 600;
    border-bottom: 2px solid #fff;
    padding-bottom: 0.25rem;
}

/* === Dark mode: Error page === */
[data-bs-theme="dark"] .error-card {
    background: #2b3035;
    border-color: rgba(255, 255, 255, 0.1);
    color: var(--bs-body-color);
}

[data-bs-theme="dark"] .error-code {
    color: var(--bs-primary);
    opacity: 0.9;
}

/* === Dark mode: Breadcrumbs === */
[data-bs-theme="dark"] .breadcrumb {
    background: transparent;
}

[data-bs-theme="dark"] .breadcrumb-item + .breadcrumb-item::before {
    color: rgba(255, 255, 255, 0.4);
}

[data-bs-theme="dark"] .breadcrumb-item a {
    color: var(--bs-primary);
}

[data-bs-theme="dark"] .breadcrumb-item.active {
    color: var(--bs-body-color);
}

/* === Dark mode: Progress bars === */
[data-bs-theme="dark"] .progress {
    background-color: rgba(255, 255, 255, 0.1);
}

[data-bs-theme="dark"] .progress-bar {
    background-color: var(--bs-primary);
}

[data-bs-theme="dark"] .progress-bar.bg-success {
    background-color: var(--bs-success) !important;
}

[data-bs-theme="dark"] .progress-bar.bg-danger {
    background-color: var(--bs-danger) !important;
}

[data-bs-theme="dark"] .progress-bar.bg-warning {
    background-color: var(--bs-warning) !important;
}

[data-bs-theme="dark"] .progress-bar.bg-info {
    background-color: var(--bs-info) !important;
}

/* === Dark mode: Accordion (config page) === */
[data-bs-theme="dark"] .accordion-item {
    background: #2b3035;
    border-color: rgba(255, 255, 255, 0.1);
}

[data-bs-theme="dark"] .accordion-button {
    background: #2b3035;
    color: var(--bs-body-color);
}

[data-bs-theme="dark"] .accordion-button:not(.collapsed) {
    background: #343a40;
    color: #fff;
}

[data-bs-theme="dark"] .accordion-button::after {
    filter: invert(1) brightness(0.8);
}

[data-bs-theme="dark"] .accordion-body {
    background: #1a1d20;
    color: var(--bs-body-color);
}

/* === Dark mode: Document detail info sections === */
[data-bs-theme="dark"] .card-body dl dt {
    color: rgba(255, 255, 255, 0.6);
}

[data-bs-theme="dark"] .card-body dl dd {
    color: var(--bs-body-color);
}

/* === Dark mode: Section tree checkboxes === */
[data-bs-theme="dark"] .section-tree .form-check-input {
    background-color: #2b3035;
    border-color: rgba(255, 255, 255, 0.3);
}

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

[data-bs-theme="dark"] .section-tree .form-check-label {
    color: var(--bs-body-color);
}

/* === Dark mode: Topic selector checkboxes (generate page) === */
[data-bs-theme="dark"] .topic-checkbox-grid .form-check-input {
    background-color: #2b3035;
    border-color: rgba(255, 255, 255, 0.3);
}

/* === Dark mode: Test-taking answer option cards === */
[data-bs-theme="dark"] .take-test-options .list-group-item.selected,
[data-bs-theme="dark"] .take-test-options .list-group-item:has(input:checked) {
    background: rgba(var(--bs-primary-rgb), 0.2);
    border-color: var(--bs-primary);
}

/* === Dark mode: Dashboard stat card value colors === */
[data-bs-theme="dark"] .stat-card h2,
[data-bs-theme="dark"] .question-bank-stats .card h3 {
    color: #fff;
}

[data-bs-theme="dark"] .stat-card h5,
[data-bs-theme="dark"] .question-bank-stats .card p {
    color: rgba(255, 255, 255, 0.6);
}

/* === Dark mode: Login card === */
[data-bs-theme="dark"] .login-card {
    background: #2b3035;
    border-color: rgba(255, 255, 255, 0.1);
}

[data-bs-theme="dark"] .login-card .card-header {
    background: #1a1d20;
    border-bottom-color: rgba(255, 255, 255, 0.1);
}

[data-bs-theme="dark"] .login-card .btn-outline-dark {
    color: var(--bs-body-color);
    border-color: rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.05);
}

[data-bs-theme="dark"] .login-card .btn-outline-dark:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

[data-bs-theme="dark"] .login-card .alert-info {
    background: rgba(13, 110, 253, 0.15);
    color: var(--bs-body-color);
    border-color: rgba(13, 110, 253, 0.3);
}

/* === Dark mode: Dropdown menu (user menu) === */
[data-bs-theme="dark"] .dropdown-menu {
    background: #2b3035;
    border-color: rgba(255, 255, 255, 0.1);
}

[data-bs-theme="dark"] .dropdown-item {
    color: var(--bs-body-color);
}

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

/* === Dark mode: Empty states === */
[data-bs-theme="dark"] .empty-state {
    color: rgba(255, 255, 255, 0.5);
}

[data-bs-theme="dark"] .empty-state i {
    color: rgba(255, 255, 255, 0.3);
}

/* === Dark mode: Score/percentage text colors === */
[data-bs-theme="dark"] .text-success {
    color: var(--bs-success) !important;
}

[data-bs-theme="dark"] .text-danger {
    color: var(--bs-danger) !important;
}

[data-bs-theme="dark"] .text-warning {
    color: var(--bs-warning) !important;
}

/* === Section tree: scrollable container === */
.section-tree {
    max-height: 500px;
    overflow-y: auto;
    scrollbar-width: thin;
}

.section-tree::-webkit-scrollbar {
    width: 6px;
}

.section-tree::-webkit-scrollbar-track {
    background: transparent;
}

.section-tree::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 3px;
}

[data-bs-theme="dark"] .section-tree::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
}

/* === Keyboard shortcut hint styling === */
.keyboard-hint {
    font-size: 0.8rem;
    color: var(--secondary-color);
    opacity: 0.7;
}

/* Print styles — force light for printing */
@media print {
    [data-bs-theme="dark"] {
        --bs-body-bg: white;
        --bs-body-color: black;
    }

    .navbar,
    .theme-toggle,
    .site-footer {
        display: none !important;
    }
}

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

/* ============================================= */
/* === GLOBAL PAGE HEADER ICON === */
/* ============================================= */

.page-header-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.page-header-icon i {
    font-size: 1.25rem;
}

.page-header-icon span {
    font-size: 1.375rem;
    line-height: 1;
}

[data-bs-theme="dark"] .page-header-icon {
    background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%) !important;
}

/* ============================================= */
/* === STAT CARD ICON CONTAINERS === */
/* ============================================= */

.stat-card-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0.75rem auto 0;
    font-size: 1rem;
}

.stat-card-icon-primary {
    background: rgba(var(--bs-primary-rgb), 0.1);
    color: var(--bs-primary);
}

.stat-card-icon-success {
    background: rgba(var(--bs-success-rgb), 0.1);
    color: var(--bs-success);
}

.stat-card-icon-info {
    background: rgba(var(--bs-info-rgb), 0.1);
    color: var(--bs-info);
}

.stat-card-icon-warning {
    background: rgba(var(--bs-warning-rgb), 0.15);
    color: var(--bs-warning);
}

.stat-card-icon-danger {
    background: rgba(var(--bs-danger-rgb), 0.1);
    color: var(--bs-danger);
}

.stat-card-icon-secondary {
    background: rgba(var(--bs-secondary-rgb), 0.1);
    color: var(--bs-secondary);
}

[data-bs-theme="dark"] .stat-card-icon-primary {
    background: rgba(59, 130, 246, 0.15);
}
[data-bs-theme="dark"] .stat-card-icon-success {
    background: rgba(25, 135, 84, 0.15);
}
[data-bs-theme="dark"] .stat-card-icon-info {
    background: rgba(13, 202, 240, 0.15);
}
[data-bs-theme="dark"] .stat-card-icon-warning {
    background: rgba(255, 193, 7, 0.15);
}
[data-bs-theme="dark"] .stat-card-icon-danger {
    background: rgba(220, 53, 69, 0.15);
}

/* ============================================= */
/* === QUESTION BANK STAT CARDS === */
/* ============================================= */

.question-bank-stats .stat-card {
    border-radius: 10px;
    border: 1px solid rgba(0, 0, 0, 0.06);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    transition: all 0.2s ease;
    overflow: hidden;
    position: relative;
}

.question-bank-stats .stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    border-radius: 4px 0 0 4px;
}

.question-bank-stats .col-md-3:nth-child(1) .stat-card::before {
    background: var(--bs-primary);
}

.question-bank-stats .col-md-3:nth-child(2) .stat-card::before {
    background: var(--bs-info);
}

.question-bank-stats .col-md-3:nth-child(3) .stat-card::before {
    background: var(--bs-warning);
}

.question-bank-stats .col-md-3:nth-child(4) .stat-card::before {
    background: var(--bs-secondary);
}

.question-bank-stats .stat-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transform: translateY(-2px);
}

.question-bank-stats .stat-card h3 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0;
}

.question-bank-stats .stat-card .card-body {
    padding: 0.5rem 0.75rem 0.75rem;
}

.question-bank-stats .stat-card p {
    font-size: 0.8125rem;
    margin-bottom: 0;
}

/* ============================================= */
/* === DASHBOARD STAT CARDS === */
/* ============================================= */

.dashboard-stat {
    border-radius: 10px;
    border: 1px solid rgba(0, 0, 0, 0.06);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    overflow: hidden;
    position: relative;
}

.dashboard-stat::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    border-radius: 4px 0 0 4px;
}

.dashboard-stat:nth-child(1)::before,
.col-md-3:nth-child(1) .dashboard-stat::before {
    background: var(--bs-primary);
}

.col-md-3:nth-child(2) .dashboard-stat::before {
    background: var(--bs-success);
}

.col-md-3:nth-child(3) .dashboard-stat::before {
    background: var(--bs-info);
}

.col-md-3:nth-child(4) .dashboard-stat::before {
    background: var(--bs-danger);
}

.dashboard-stat:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transform: translateY(-2px);
}

.dashboard-stat h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0;
}

.dashboard-stat h5 {
    font-size: 0.8125rem;
    margin-bottom: 0.25rem;
}

[data-bs-theme="dark"] .dashboard-stat {
    background: #1e2125;
    border-color: rgba(255, 255, 255, 0.08);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

[data-bs-theme="dark"] .dashboard-stat:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

/* ============================================= */
/* === RECENT TESTS LIST === */
/* ============================================= */

.recent-tests-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.recent-test-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.875rem 1rem;
    border-radius: 10px;
    border: 1px solid rgba(0, 0, 0, 0.06);
    background: var(--bs-body-bg);
    text-decoration: none;
    color: var(--bs-body-color);
    transition: all 0.15s ease;
    gap: 0.75rem;
}

.recent-test-item:hover {
    border-color: rgba(var(--bs-primary-rgb), 0.2);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transform: translateY(-1px);
}

.recent-test-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 0;
}

.recent-test-status {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 1rem;
}

.status-completed {
    background: rgba(var(--bs-success-rgb), 0.1);
    color: var(--bs-success);
}

.status-progress {
    background: rgba(var(--bs-warning-rgb), 0.15);
    color: var(--bs-warning);
}

.recent-test-info {
    min-width: 0;
}

.recent-test-title {
    font-weight: 600;
    font-size: 0.9375rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.recent-test-meta {
    font-size: 0.8125rem;
    color: var(--bs-body-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.recent-test-right {
    text-align: right;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.125rem;
}

.recent-test-score {
    font-size: 1.25rem;
    font-weight: 700;
}

[data-bs-theme="dark"] .recent-test-item {
    background: #1e2125;
    border-color: rgba(255, 255, 255, 0.08);
}

[data-bs-theme="dark"] .recent-test-item:hover {
    background: #2b3035;
    border-color: rgba(var(--bs-primary-rgb), 0.3);
}

/* ============================================= */
/* === TIP NUMBERS === */
/* ============================================= */

.tip-number {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(var(--bs-primary-rgb), 0.1);
    color: var(--bs-primary);
    font-size: 0.75rem;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-right: 0.5rem;
}

/* ============================================= */
/* === SIDEBAR CARD POLISH === */
/* ============================================= */

.sidebar-card {
    border-radius: 10px;
    border: 1px solid rgba(0, 0, 0, 0.06);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.sidebar-card .card-header {
    background: #f8f9fa;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    padding: 0.75rem 1rem;
}

.sidebar-card .card-header h5 {
    font-size: 0.9375rem;
    font-weight: 600;
}

/* ============================================= */
/* === START TEST PAGE === */
/* ============================================= */

.start-test-page .config-field label {
    margin-bottom: 0.375rem;
}

/* ============================================= */
/* === DOCUMENTS PAGE === */
/* ============================================= */

.documents-page .doc-card {
    border-radius: 10px;
    border: 1px solid rgba(0, 0, 0, 0.06);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    transition: all 0.2s ease;
}

.documents-page .doc-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transform: translateY(-2px);
}

.documents-page .doc-card .card-title a {
    text-decoration: none;
    font-size: 0.9375rem;
    font-weight: 600;
}

.documents-page .doc-card .card-title a:hover {
    color: var(--bs-primary);
}

.documents-page .doc-card-footer {
    border-top: 1px solid rgba(0, 0, 0, 0.05);
    padding: 0.75rem 1rem;
}

/* ============================================= */
/* === QUESTION BANK PAGE === */
/* ============================================= */

.question-bank-page .question-card {
    border-radius: 10px;
    border: 1px solid rgba(0, 0, 0, 0.06);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    transition: all 0.2s ease;
}

.question-bank-page .question-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transform: translateY(-2px);
}

/* ============================================= */
/* === DARK MODE: QUESTION BANK STATS === */
/* ============================================= */

[data-bs-theme="dark"] .question-bank-stats .stat-card {
    background: #1e2125;
    border-color: rgba(255, 255, 255, 0.08);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

[data-bs-theme="dark"] .question-bank-stats .stat-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

/* ============================================= */
/* === MOBILE RESPONSIVE ADJUSTMENTS === */
/* ============================================= */

@media (max-width: 767.98px) {
    .page-header-icon {
        width: 40px;
        height: 40px;
        border-radius: 10px;
        font-size: 1.125rem;
    }

    .recent-test-item {
        padding: 0.75rem;
        flex-wrap: wrap;
    }

    .recent-test-right {
        flex-direction: row;
        align-items: center;
        width: 100%;
        justify-content: space-between;
    }

    .recent-test-score {
        font-size: 1rem;
    }

    .stat-card-icon {
        width: 30px;
        height: 30px;
        border-radius: 8px;
        font-size: 0.875rem;
    }

    .question-bank-stats .stat-card h3 {
        font-size: 1.375rem;
    }

    .practice-home .stat-card h2 {
        font-size: 1.375rem;
    }

    .dashboard-stat h2 {
        font-size: 1.375rem;
    }
}