/* wwwroot/css/site.css */

/* ==========================================================================
   1. CSS Custom Properties (Design Tokens)
   ========================================================================== */
:root {
    /* Colors */
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-primary-light: #3b82f6;
    --color-secondary: #64748b;
    --color-success: #22c55e;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;

    /* Neutrals */
    --color-white: #ffffff;
    --color-gray-50: #f8fafc;
    --color-gray-100: #f1f5f9;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e1;
    --color-gray-400: #94a3b8;
    --color-gray-500: #64748b;
    --color-gray-600: #475569;
    --color-gray-700: #334155;
    --color-gray-800: #1e293b;
    --color-gray-900: #0f172a;

    /* Typography */
    --font-sans: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-serif: 'Georgia', 'Times New Roman', serif;
    --font-display: 'Playfair Display', Georgia, 'Times New Roman', serif;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);

    /* Border radius */
    --radius-sm: 0.25rem;
    --radius: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition: 200ms ease;
    --transition-slow: 300ms ease;
}

/* ==========================================================================
   2. Base Styles
   ========================================================================== */
body {
    background-color: var(--color-gray-50);
    color: var(--color-gray-800);
    font-family: var(--font-sans);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* ==========================================================================
   3. Experiment Hero Section
   ========================================================================== */
.experiment-hero {
    background: linear-gradient(135deg, var(--color-gray-900) 0%, var(--color-gray-800) 100%);
    padding: var(--space-4) 0;
    position: relative;
    overflow: hidden;
}

.experiment-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.experiment-hero__content {
    position: relative;
    text-align: center;
}

.experiment-hero__title {
    color: var(--color-white);
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 700;
    margin: 0 0 var(--space-1);
    letter-spacing: -0.02em;
}

/* FocusOnNavigate targets h1 elements; suppress the default focus ring on hero titles. */
.experiment-hero__title:focus,
.experiment-hero__title:focus-visible {
    outline: none;
    box-shadow: none;
}

.experiment-hero__subtitle {
    color: var(--color-gray-300);
    font-size: clamp(0.875rem, 1.5vw, 1rem);
    margin: 0;
    font-weight: 400;
}

/* ==========================================================================
   4. Experiment Layout (Two Columns)
   ========================================================================== */
.experiment-layout {
    padding: var(--space-8) 0 var(--space-12);
    min-height: calc(100vh - 200px);
}

.experiment-layout__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-8);
}

@media (min-width: 1024px) {
    .experiment-layout__grid {
        grid-template-columns: 1fr 320px;
        gap: var(--space-10);
    }
}

.experiment-layout__main {
    min-width: 0; /* Prevent grid blowout */
    container-type: inline-size;
}

.experiment-layout__sidebar {
    border-top: 1px solid var(--border-color, #e0e0e0);
    padding-top: var(--space-6, 1.5rem);
}

@media (min-width: 1024px) {
    .experiment-layout__sidebar {
        border-top: none;
        padding-top: 0;
    }
}

.sidebar-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: var(--space-6);
}

/* ==========================================================================
   5. Progress Tracker
   ========================================================================== */
.progress-tracker {
    margin-bottom: var(--space-6);
}

.progress-tracker--compact {
    margin-bottom: var(--space-4);
}

.progress-tracker__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-2);
}

.progress-tracker__label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-gray-600);
}

.progress-tracker__percentage {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-primary);
}

.progress-tracker__bar {
    height: 6px;
    background: var(--color-gray-200);
    border-radius: 999px;
    overflow: hidden;
}

.progress-tracker__fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    border-radius: 999px;
    transition: width var(--transition-slow);
}

.progress-tracker__steps {
    display: flex;
    justify-content: space-between;
    margin-top: var(--space-3);
    padding: 0 var(--space-1);
}

.progress-tracker__step {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 600;
    background: var(--color-gray-100);
    color: var(--color-gray-500);
    border: 2px solid var(--color-gray-200);
    transition: all var(--transition);
}

.progress-tracker__step--current {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
    transform: scale(1.1);
}

.progress-tracker__step--complete {
    background: var(--color-success);
    color: var(--color-white);
    border-color: var(--color-success);
}

/* ==========================================================================
   6. Question Card
   ========================================================================== */
.question-card {
    background: transparent;
    border-radius: 0;
    box-shadow: none;
    overflow: visible;
}

.question-card__header {
    background: transparent;
    padding: 0;
    border-bottom: 0;
    margin-bottom: var(--space-4);
}

.question-card__title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-gray-800);
    margin: 0;
}

.question-card__subtitle {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    margin: var(--space-1) 0 0;
}

.question-card__body {
    padding: 0;
}

.question-card__image {
    margin-bottom: var(--space-5);
    text-align: center;
}

.question-card__image img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius);
    box-shadow: none;
}

.question-card__content p {
    margin-bottom: var(--space-4);
    color: var(--color-gray-700);
    line-height: 1.7;
}

.question-card__content p:last-child {
    margin-bottom: 0;
}

.question-card__footer {
    padding: var(--space-4) 0 0;
    background: transparent;
    border-top: 0;
}

/* ==========================================================================
   7. Enhanced Form Controls
   ========================================================================== */
.form-check {
    padding: var(--space-3) var(--space-4);
    margin-bottom: var(--space-2);
    border-radius: var(--radius);
    border: 1px solid var(--color-gray-200);
    background: var(--color-white);
    transition: all var(--transition);
    cursor: pointer;
    width: fit-content;
    min-width: 220px;
    max-width: 100%;
}

/* Inline choice group for short binary options (Yes/No, True/False) */
.choice-group-inline {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3, 0.75rem);
}
.choice-group-inline .form-check {
    min-width: 120px;
    flex: 0 1 auto;
}

.form-check:hover {
    border-color: var(--color-primary-light);
    background: var(--color-gray-50);
}

.form-check:has(.form-check-input:checked) {
    border-color: var(--color-primary);
    background: rgba(37, 99, 235, 0.05);
}

.form-check-input {
    width: 1.25rem;
    height: 1.25rem;
    margin-top: 0;
    margin-right: var(--space-3);
    cursor: pointer;
}

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

.form-check-label {
    font-size: 0.9375rem;
    color: var(--color-gray-700);
    cursor: pointer;
    flex: 1;
}

/* Question text styling */
.question-text {
    font-size: 1.0625rem;
    font-weight: 500;
    color: var(--color-gray-800);
    margin-bottom: var(--space-4);
    line-height: 1.6;
}

.question-text strong {
    color: var(--color-gray-900);
}

/* ==========================================================================
   8. Buttons
   ========================================================================== */
.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border: none;
    padding: var(--space-3) var(--space-6);
    font-weight: 500;
    font-size: 0.9375rem;
    border-radius: var(--radius);
    transition: all var(--transition);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-rounded {
    border-radius: 999px;
}

/* ==========================================================================
   9. Alerts
   ========================================================================== */
.alert {
    border-radius: var(--radius-lg);
    border: none;
    padding: var(--space-4) var(--space-5);
}

.alert-success {
    background: linear-gradient(135deg, #dcfce7 0%, #bbf7d0 100%);
    color: #166534;
}

.alert-info {
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    color: #1e40af;
}

.alert-warning {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    color: #92400e;
}

.alert-danger {
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    color: #991b1b;
}

.alert-secondary {
    background: linear-gradient(135deg, var(--color-gray-100) 0%, var(--color-gray-200) 100%);
    color: var(--color-gray-700);
}

.alert h5 {
    font-weight: 600;
    margin-bottom: var(--space-2);
}

/* ==========================================================================
   10. Readable Column (Legacy Support)
   ========================================================================== */
.readable-column {
    max-width: 56rem;
    margin-left: 0;
    margin-right: auto;
}

.readable-column p {
    display: block;
    margin-bottom: var(--space-4);
    line-height: 1.7;
}

/* Fill the readable column width for data visuals/tables by default. */
.readable-column .chart-container,
.readable-column .rz-chart,
.readable-column .table-responsive,
.readable-column table {
    width: 100%;
    max-width: 100%;
}

/* ==========================================================================
   11. Cards (Game Grid)
   ========================================================================== */
.card {
    border: none;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: all var(--transition);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card-body {
    padding: var(--space-5);
}

.card-title {
    font-weight: 600;
    color: var(--color-gray-800);
}

/* ==========================================================================
   12. Animation
   ========================================================================== */
.fade-in {
    opacity: 0;
    animation: fadeIn 0.4s ease-out forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================================================
   13. Hero Section (Home)
   ========================================================================== */
.hero-section {
    background: linear-gradient(135deg, var(--color-gray-900) 0%, var(--color-gray-800) 100%);
    padding: var(--space-12) 0;
}

/* FocusOnNavigate targets h1 elements; suppress the default focus ring on the home hero title. */
.hero-section h1:focus,
.hero-section h1:focus-visible {
    outline: none !important;
    box-shadow: none !important;
}

/* ==========================================================================
   14. Charts
   ========================================================================== */
.chart-container {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    box-shadow: var(--shadow-sm);
}

.chart-container--full-main {
    width: 100%;
    max-width: none;
}

@supports (width: 1cqw) {
    .readable-column .chart-container--full-main {
        width: 100cqw;
        max-width: 100cqw;
    }
}

/* ==========================================================================
   15. Utility Classes
   ========================================================================== */
.text-muted {
    color: var(--color-gray-500) !important;
}

.text-primary {
    color: var(--color-primary) !important;
}

/* ==========================================================================
   16. Focus States (Accessibility)
   ========================================================================== */
.btn:focus-visible,
.form-check-input:focus-visible,
.form-control:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* ==========================================================================
   17. Legacy Styles (Preserved)
   ========================================================================== */
.result-pair {
    display: flex !important;
    gap: var(--space-4);
    margin-bottom: var(--space-5);
    align-items: stretch;
    flex-wrap: wrap;
}

.result-pair .syllo-left-box,
.result-pair .syllo-right-box {
    box-sizing: border-box;
    padding: var(--space-4);
    border: 1px solid var(--color-gray-200);
    background: var(--color-white);
    border-radius: var(--radius);
}

@media (min-width: 768px) {
    .result-pair .syllo-left-box,
    .result-pair .syllo-right-box {
        flex: 0 0 calc(50% - 0.5rem);
        min-width: 300px;
    }
}

@media (max-width: 767.98px) {
    .result-pair {
        flex-direction: column;
    }
    .result-pair .syllo-left-box,
    .result-pair .syllo-right-box {
        flex: 1 1 100%;
        min-width: 0;
    }
}

.validity-rules {
    max-width: 760px;
    line-height: 1.7;
}

.validity-rules blockquote {
    background: var(--color-gray-50);
    border-left: 4px solid var(--color-primary);
    padding: var(--space-3) var(--space-4);
    font-style: italic;
    margin: var(--space-4) 0;
    border-radius: var(--radius-sm);
}

/* ==========================================================================
   18. Blazor Error Boundary
   ========================================================================== */
.blazor-error-boundary {
    background: var(--color-danger);
    padding: var(--space-4);
    color: white;
    border-radius: var(--radius);
}

.blazor-error-boundary::after {
    content: "An error has occurred.";
}

/* ==========================================================================
   19. Validation
   ========================================================================== */
.valid.modified:not([type=checkbox]) {
    outline: 2px solid var(--color-success);
}

.invalid {
    outline: 2px solid var(--color-danger);
}

.validation-message {
    color: var(--color-danger);
    font-size: 0.875rem;
    margin-top: var(--space-2);
}

/* ==========================================================================
   20. Intro Section
   ========================================================================== */
.intro {
    max-width: 600px;
    margin-top: var(--space-6);
}

/* ==========================================================================
   21. Mobile Responsive Tweaks
   ========================================================================== */
@media (max-width: 640px) {
    .experiment-hero {
        padding: var(--space-3) 0;
    }

    .experiment-layout {
        padding: var(--space-5) 0 var(--space-8);
    }

    .question-card__body {
        padding: 0;
    }

    .question-card__header {
        padding: 0;
    }

    .form-check {
        padding: var(--space-3);
    }

    .btn-primary {
        width: 100%;
        padding: var(--space-4);
    }
}

/* ==========================================================================
   22. Accessibility: Reduced Motion
   ========================================================================== */
@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;
    }
}

/* ==========================================================================
   23. Dark Mode Support
   ========================================================================== */
@media (prefers-color-scheme: dark) {
    :root {
        --color-primary: #3b82f6;
        --color-primary-dark: #2563eb;
        --color-primary-light: #60a5fa;
        --color-secondary: #94a3b8;
        --color-success: #4ade80;
        --color-warning: #fbbf24;
        --color-danger: #f87171;

        --color-white: #1e293b;
        --color-gray-50: #0f172a;
        --color-gray-100: #1e293b;
        --color-gray-200: #334155;
        --color-gray-300: #475569;
        --color-gray-400: #64748b;
        --color-gray-500: #94a3b8;
        --color-gray-600: #cbd5e1;
        --color-gray-700: #e2e8f0;
        --color-gray-800: #f1f5f9;
        --color-gray-900: #f8fafc;
    }

    body {
        color-scheme: dark;
    }

    .alert-success {
        background: linear-gradient(135deg, #14532d 0%, #166534 100%);
        color: #bbf7d0;
    }

    .alert-info {
        background: linear-gradient(135deg, #1e3a5f 0%, #1e40af 100%);
        color: #bfdbfe;
    }

    .alert-warning {
        background: linear-gradient(135deg, #78350f 0%, #92400e 100%);
        color: #fde68a;
    }

    .alert-danger {
        background: linear-gradient(135deg, #7f1d1d 0%, #991b1b 100%);
        color: #fecaca;
    }

    .form-check:has(.form-check-input:checked) {
        background: rgba(59, 130, 246, 0.15);
    }

    img {
        opacity: 0.9;
    }

    /* Hero sections must keep dark backgrounds regardless of scheme */
    .hero-section,
    .experiment-hero {
        background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    }

    /* Bootstrap card overrides */
    .card {
        background-color: #1e293b;
        border-color: #334155;
        color: #e2e8f0;
    }

    .card-title {
        color: #f1f5f9;
    }

    .card-text {
        color: #cbd5e1;
    }

    .card-header.bg-primary {
        border-bottom-color: #334155;
    }

    .card-body a {
        color: #60a5fa;
    }

    .card-body a:hover {
        color: #93bbfd;
    }

    /* Navbar */
    .site-nav {
        background-color: #1e293b;
        border-bottom-color: #334155;
    }

    .site-nav .navbar-brand {
        color: #f1f5f9;
    }

    .site-nav .nav-link {
        color: #94a3b8 !important;
    }

    .site-nav .nav-link:hover,
    .site-nav .nav-link.active {
        color: #f1f5f9 !important;
    }

    .site-nav .navbar-toggler {
        border-color: #475569;
        color: #cbd5e1;
    }

    .site-nav .navbar-collapse {
        border-top-color: #334155;
    }

    /* Bootstrap text utilities */
    .text-muted {
        color: #94a3b8 !important;
    }

    /* Card footer */
    .card-footer.bg-transparent {
        background-color: transparent !important;
        border-top-color: #334155;
    }

    .card-footer a.btn-primary {
        color: #fff;
    }

    /* Card title links */
    .card-title a {
        color: #f1f5f9;
    }

    .card-title a:hover {
        color: #60a5fa;
    }

    /* Border-bottom on headings */
    .border-bottom {
        border-bottom-color: #334155 !important;
    }

    /* Border-primary cards (category cards on home page) */
    .card.border-primary {
        border-color: #3b82f6 !important;
    }

    /* Outline buttons */
    .btn-outline-primary {
        color: #60a5fa;
        border-color: #60a5fa;
    }

    .btn-outline-primary:hover {
        background-color: #60a5fa;
        color: #0f172a;
    }

    .btn-outline-light {
        color: #e2e8f0;
        border-color: #e2e8f0;
    }

    /* Table overrides for results pages */
    .table {
        color: #e2e8f0;
    }

    /* List links in cards */
    .list-unstyled a {
        color: #60a5fa;
    }

    .list-unstyled a:hover {
        color: #93bbfd;
    }
}

/* ==========================================================================
   24. Loading Spinner
   ========================================================================== */
.loading-spinner {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
    position: relative;
    overflow: hidden;
    isolation: isolate;
}

.loading-spinner::after {
    content: '';
    width: 40px;
    height: 40px;
    border: 4px solid var(--color-gray-200, #e2e8f0);
    border-top-color: var(--color-primary, #2563eb);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    flex-shrink: 0;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ==========================================================================
   25. Skip Link (Accessibility)
   ========================================================================== */
.skip-link {
    position: absolute;
    top: 0;
    left: 0;
    background: var(--color-primary, #2563eb);
    color: white;
    padding: 8px 16px;
    z-index: 100;
    border-radius: 0 0 0.375rem 0.375rem;
    transform: translateY(-140%);
    transition: transform 0.2s ease;
    text-decoration: none;
}

.skip-link:focus,
.skip-link:focus-visible {
    transform: translateY(0);
    outline: 2px solid #ffffff;
    outline-offset: 2px;
}

/* ==========================================================================
   26. Mobile Touch Targets
   ========================================================================== */
@media (max-width: 768px) {
    button, .btn, [role="button"], a.btn {
        min-height: 44px;
        min-width: 44px;
    }
}

/* ==========================================================================
   27. Visually Hidden Utility (Screen Reader Only)
   ========================================================================== */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ==========================================================================
   28. Site Navbar
   ========================================================================== */
.site-nav {
    background: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
    padding: 0;
}

.site-nav .navbar-brand {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-gray-900);
    text-decoration: none;
    letter-spacing: -0.01em;
    padding: 1.125rem 0;
    margin: 0;
}

.site-nav .navbar-brand:hover {
    color: var(--color-gray-900);
    text-decoration: none;
}

.site-nav .navbar-toggler {
    border: 1px solid var(--color-gray-300);
    color: var(--color-gray-500);
    padding: 0.375rem 0.625rem;
    font-size: 1rem;
    border-radius: var(--radius-sm);
}

.site-nav .navbar-toggler:focus {
    box-shadow: none;
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.site-nav .nav-link {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-gray-500) !important;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 1.25rem 1rem !important;
    position: relative;
    transition: color var(--transition);
}

.site-nav .nav-link:hover {
    color: var(--color-gray-900) !important;
}

.site-nav .nav-link.active {
    color: var(--color-gray-900) !important;
}

.site-nav .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    right: 50%;
    height: 2px;
    background: var(--color-primary);
    border-radius: 1px;
    transition: left var(--transition-slow), right var(--transition-slow);
}

.site-nav .nav-link:hover::after,
.site-nav .nav-link.active::after {
    left: 1rem;
    right: 1rem;
}

@media (max-width: 991.98px) {
    .site-nav .navbar-brand {
        font-size: 1.25rem;
    }

    .site-nav .nav-link {
        padding: 0.75rem 0 !important;
    }

    .site-nav .nav-link::after {
        display: none;
    }

    .site-nav .navbar-collapse {
        padding: 0.75rem 0;
        border-top: 1px solid var(--color-gray-200);
        margin-top: 0.75rem;
    }
}

/* ==========================================================================
   29. Site Footer
   ========================================================================== */
.site-footer {
    background: #0f172a;
    color: #94a3b8;
    margin-top: 4rem;
    margin-bottom: 120px;
    padding: 3.5rem 0 0;
    font-size: 0.875rem;
    line-height: 1.7;
}

.site-footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    padding-bottom: 2.5rem;
}

.site-footer__brand {
    font-family: var(--font-display);
    font-size: 1.375rem;
    font-weight: 700;
    color: #e2e8f0;
    text-decoration: none;
    display: block;
    margin-bottom: 0.75rem;
}

.site-footer__brand:hover {
    color: #ffffff;
    text-decoration: none;
}

.site-footer__tagline {
    color: #64748b;
    max-width: 28rem;
    line-height: 1.7;
    margin: 0;
}

.site-footer__heading {
    font-family: var(--font-sans);
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: #cbd5e1;
    margin: 0 0 1rem;
}

.site-footer__list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.site-footer__list li {
    margin-bottom: 0.5rem;
}

.site-footer__list a {
    color: #94a3b8;
    text-decoration: none;
    transition: color 200ms ease;
}

.site-footer__list a:hover {
    color: #ffffff;
}

.site-footer__bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 0;
    font-size: 0.8125rem;
    color: #475569;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.site-footer__bottom a {
    color: #475569;
    text-decoration: none;
    transition: color 200ms ease;
}

.site-footer__bottom a:hover {
    color: #94a3b8;
}

@media (max-width: 768px) {
    .site-footer {
        padding: 2.5rem 0 0;
        margin-top: 3rem;
    }

    .site-footer__grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .site-footer__bottom {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }
}

.site-footer__bottom-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

@media (max-width: 768px) {
    .site-footer__bottom-links {
        flex-direction: column;
        gap: 0.5rem;
    }
}

.consent-link {
    cursor: pointer;
    color: #475569;
    transition: color 200ms ease;
}

.consent-link:hover {
    color: #94a3b8;
}

/* ==========================================================================
   30. Ad Slots
   ========================================================================== */

/* Leaderboard (728x90) — fixed size, no layout shift */
.ad-slot--leaderboard {
    max-width: 100%;
    width: 728px;
    height: 90px;
    margin: 0 auto var(--space-6);
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

/* Medium rectangle (300x250) */
.ad-slot--mrec {
    min-height: 250px;
    min-width: 300px;
    display: flex;
    justify-content: center;
    margin-top: var(--space-6);
}

/* Skyscraper (160x600) */
.ad-slot--skyscraper {
    min-height: 600px;
    min-width: 160px;
    display: flex;
    justify-content: center;
    margin-top: var(--space-6);
}

/* Mobile ad (300x250) */
.ad-slot--mobile {
    min-height: 250px;
    max-width: 300px;
    margin: 0 auto var(--space-6);
    display: flex;
    justify-content: center;
}

/* Sticky ad — sticks while scrolling */
.ad-slot--sticky {
    position: sticky;
    top: var(--space-4);
}