/* ============================================
   sjbridger.com — Landing Page Styles
   Dark, cinematic, typography-driven
   ============================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
    /* Colors */
    --color-bg-deep: #0a0a0a;
    --color-bg: #0d0d0d;
    --color-bg-elevated: #141414;
    --color-bg-card: #1a1a1a;
    --color-bg-accent: #111111;
    --color-surface: #1e1e1e;
    --color-border: #2a2a2a;
    --color-border-light: #333333;

    --color-text-primary: #f5f5f5;
    --color-text-secondary: #c0c0c0;
    --color-text-muted: #9a9a9a;
    --color-text-dim: #666666;

    --color-accent: #c9a227;
    --color-accent-hover: #e0b88a;
    --color-link: #409cff;

    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Source Serif 4', Georgia, serif;
    --font-mono: 'SF Mono', 'Fira Code', monospace;

    /* Spacing */
    --section-padding: clamp(80px, 10vw, 140px);
    --container-width: 1140px;
    --container-padding: clamp(20px, 5vw, 40px);

    /* Transitions */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
    --transition-fast: 0.2s var(--ease-out);
    --transition-medium: 0.4s var(--ease-out);
    --transition-slow: 0.8s var(--ease-out);
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    font-weight: 300;
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--color-text-primary);
    background-color: var(--color-bg);
    overflow-x: hidden;
}

img, video {
    max-width: 100%;
    display: block;
}

a {
    color: var(--color-link);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

::selection {
    background: var(--color-accent);
    color: var(--color-bg);
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.section-label {
    font-family: var(--font-heading);
    font-size: 0.8125rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 1rem;
}

.section-heading {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 1.5rem;
    color: var(--color-text-primary);
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: 0.9375rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    padding: 14px 36px;
    border-radius: 0;
    border: 1px solid;
    cursor: pointer;
    transition: all 0.25s var(--ease-out);
    text-decoration: none;
}

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

.btn-primary:hover {
    background: #e8c04a;
    border-color: #e8c04a;
    color: var(--color-bg);
    box-shadow: 0 0 24px rgba(201, 162, 39, 0.25);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text-primary);
    border-color: rgba(255, 255, 255, 0.22);
}

.btn-secondary:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    box-shadow: 0 0 20px rgba(201, 162, 39, 0.1);
}

/* ---------- Navigation ---------- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 0;
    transition: background var(--transition-medium), padding var(--transition-medium);
}

.site-header.scrolled {
    background: rgba(10, 10, 10, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

/* Strip backdrop-filter when mobile nav is open — prevents stacking context
   from trapping the position:fixed nav overlay (same fix as Evidence Library).
   backdrop-filter creates a containing block for fixed descendants, so the
   nav overlay gets clipped to the header bar instead of covering the viewport.
   !important ensures no specificity battle with .scrolled or other states. */
.site-header:has(.nav-links.active) {
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    background: rgb(10, 10, 10) !important;
    border-bottom: none !important;
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 24px var(--container-padding);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-header.scrolled .nav-container {
    padding-top: 16px;
    padding-bottom: 16px;
}

.nav-logo {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 400;
    color: var(--color-text-primary);
    text-decoration: none;
    letter-spacing: 0.02em;
}

.nav-logo:hover {
    color: var(--color-accent) !important;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
    align-items: center;
}

.nav-links a {
    font-family: var(--font-heading);
    font-size: 0.875rem;
    font-weight: 400;
    color: var(--color-text-secondary);
    text-decoration: none;
    letter-spacing: 0.02em;
    transition: color var(--transition-fast);
}

.nav-links a:hover {
    color: var(--color-text-primary);
}

.nav-links a.active {
    color: var(--color-accent);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 1.5px;
    background: var(--color-text-primary);
    transition: all var(--transition-fast);
}

/* ---------- Hero ---------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-video-container {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        180deg,
        rgba(10, 10, 10, 0.5) 0%,
        rgba(10, 10, 10, 0.35) 40%,
        rgba(10, 10, 10, 0.6) 100%
    );
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 720px;
    padding: 80px var(--container-padding) 0;
}

.hero-author {
    font-family: var(--font-heading);
    font-size: 0.875rem;
    font-weight: 400;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-text-primary);
    margin-bottom: 1.5rem;
    opacity: 0;
    animation: fadeUp 1s var(--ease-out) 0.2s forwards;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 600;
    letter-spacing: -0.03em;
    line-height: 1.1;
    color: var(--color-text-primary);
    margin-bottom: 0.25rem;
    opacity: 0;
    animation: fadeUp 1s var(--ease-out) 0.4s forwards;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5), 0 1px 3px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-family: var(--font-body);
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
    font-weight: 300;
    font-style: italic;
    color: var(--color-accent-hover);
    margin-bottom: 2rem;
    opacity: 0;
    animation: fadeUp 1s var(--ease-out) 0.6s forwards;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.7), 0 1px 3px rgba(0, 0, 0, 0.5);
}

.hero-hook {
    font-size: clamp(1rem, 1.5vw, 1.25rem);
    font-weight: 300;
    line-height: 1.6;
    color: var(--color-text-primary);
    margin-bottom: 2.5rem;
    opacity: 0;
    animation: fadeUp 1s var(--ease-out) 0.8s forwards;
}

.hero-cta {
    opacity: 0;
    animation: fadeUp 1s var(--ease-out) 1s forwards;
}

.hero-cta-label {
    font-family: var(--font-heading);
    font-size: 0.8125rem;
    letter-spacing: 0.08em;
    color: var(--color-text-secondary);
    margin-bottom: 1rem;
}

.scroll-indicator {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
    opacity: 0;
    animation: fadeIn 1s var(--ease-out) 1.5s forwards;
}

.scroll-indicator span {
    display: block;
    width: 1px;
    height: 48px;
    background: linear-gradient(to bottom, var(--color-text-muted), transparent);
    animation: scrollPulse 2s var(--ease-in-out) infinite;
}

/* ---------- Hook Section ---------- */
.hook {
    padding: var(--section-padding) 0;
    background: var(--color-bg);
}

.hook-text {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
    border: none;
}

.hook-text p {
    font-family: var(--font-body);
    font-size: clamp(1.25rem, 2.5vw, 1.625rem);
    font-weight: 300;
    font-style: italic;
    line-height: 1.5;
    color: var(--color-text-primary);
    margin-bottom: 0.75rem;
    opacity: 0.9;
}

.hook-text p:last-child {
    margin-bottom: 0;
}

/* ---------- Book Description ---------- */
.book-description {
    padding: var(--section-padding) 0;
    background: var(--color-bg-elevated);
}

.book-layout {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 80px;
    align-items: start;
}

.book-text p {
    margin-bottom: 1.25rem;
    color: var(--color-text-secondary);
}

.book-text p:last-child {
    margin-bottom: 0;
}

.book-text .emphasis {
    font-style: italic;
    color: var(--color-text-primary);
}

.book-text strong {
    font-weight: 600;
    color: var(--color-text-primary);
}

/* Book Cover Image */
.book-cover-image {
    width: 100%;
    max-width: 380px;
    height: auto;
    display: block;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

/* ---------- Frequencies Section ---------- */
.frequencies {
    padding: var(--section-padding) 0;
    background: var(--color-bg);
}

.frequencies .section-label,
.frequencies .section-heading {
    text-align: center;
}

.frequencies-intro {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 3.5rem;
    color: var(--color-text-secondary);
}

.frequency-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1px;
    background: var(--color-border);
    border: 1px solid var(--color-border);
    margin-bottom: 3rem;
}

.frequency-card {
    background: var(--color-bg);
    padding: clamp(28px, 3vw, 48px);
    transition: background var(--transition-fast);
}

.frequency-card:hover {
    background: var(--color-bg-elevated);
}

.frequency-number {
    font-family: var(--font-heading);
    font-size: 0.75rem;
    font-weight: 400;
    letter-spacing: 0.1em;
    color: rgba(255, 255, 255, 0.4);
    display: block;
    margin-bottom: 1rem;
}

.frequency-name {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 0.5rem;
}

.frequency-question {
    font-family: var(--font-body);
    font-size: 1rem;
    font-style: italic;
    color: var(--color-accent);
    margin-bottom: 1rem;
}

.frequency-example {
    font-size: 0.9375rem;
    line-height: 1.65;
    color: var(--color-text-secondary);
}

.frequencies-cta {
    text-align: center;
}

/* ---------- Field Guide ---------- */
.fieldguide {
    padding: var(--section-padding) 0;
    background: var(--color-bg-accent);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.fieldguide-layout {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 64px;
    align-items: center;
}

.fieldguide-text p {
    color: var(--color-text-secondary);
    margin-bottom: 1rem;
}

.fieldguide-note {
    font-size: 0.9375rem;
    color: var(--color-text-muted) !important;
    margin-top: 0.5rem;
}

.fieldguide-preview {
    display: flex;
    justify-content: center;
    align-items: center;
}

.fieldguide-preview img {
    width: 380px;
    height: auto;
    border: 1px solid var(--color-border-light);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5), 0 4px 12px rgba(0, 0, 0, 0.3);
}

.fieldguide-content {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* ---------- About ---------- */
.about {
    padding: var(--section-padding) 0;
    background: var(--color-bg-elevated);
}

.about-text {
    max-width: 720px;
}

.about-text p {
    color: var(--color-text-secondary);
    margin-bottom: 1.25rem;
}

.about-text p:last-child {
    margin-bottom: 0;
}

/* ---------- Evidence Band ---------- */
.evidence-band {
    padding: clamp(60px, 8vw, 100px) 0;
    background: var(--color-bg);
    text-align: center;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.evidence-band-text {
    font-family: var(--font-body);
    font-size: clamp(1.0625rem, 1.8vw, 1.3125rem);
    font-weight: 300;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: 2rem;
}

.evidence-stats {
    color: var(--color-text-primary);
    font-weight: 400;
}

/* ---------- Newsletter ---------- */
.newsletter {
    padding: var(--section-padding) 0;
    background: var(--color-bg-elevated);
}

.newsletter-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.newsletter-subhead {
    font-style: italic;
    color: var(--color-accent) !important;
    margin-bottom: 1.5rem !important;
}

.newsletter-text p {
    color: var(--color-text-secondary);
    margin-bottom: 1rem;
}

/* ---------- Companion ---------- */
.companion {
    padding: var(--section-padding) 0;
    background: var(--color-bg);
    text-align: center;
}

.companion-badge {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: 0.6875rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-accent);
    border: 1px solid var(--color-accent);
    padding: 6px 18px;
    margin-bottom: 2rem;
    opacity: 0.8;
}

.companion-title {
    font-size: clamp(2rem, 4vw, 3rem);
}

.companion-subtitle {
    font-family: var(--font-body);
    font-size: 1.25rem;
    font-style: italic;
    font-weight: 300;
    color: var(--color-accent);
    margin-bottom: 1.5rem;
    margin-top: -0.75rem;
}

.companion-description {
    max-width: 600px;
    margin: 0 auto 1.5rem;
    color: var(--color-text-secondary);
}

.companion-cta-text {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
}

.companion .mailerlite-placeholder {
    max-width: 420px;
    margin: 0 auto;
}

/* ---------- Placeholder Forms ---------- */
.placeholder-form {
    display: flex;
    gap: 0;
}

.placeholder-form input {
    flex: 1;
    padding: 14px 18px;
    font-family: var(--font-body);
    font-size: 0.9375rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-right: none;
    color: var(--color-text-primary);
    outline: none;
    transition: border-color var(--transition-fast);
}

.placeholder-form input::placeholder {
    color: var(--color-text-dim);
}

.placeholder-form input:focus {
    border-color: var(--color-text-muted);
}

.placeholder-form button {
    font-family: var(--font-heading);
    font-size: 0.8125rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    padding: 14px 28px;
    background: var(--color-accent);
    color: var(--color-bg);
    border: 1px solid var(--color-accent);
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.25s var(--ease-out);
}

.placeholder-form button:hover {
    background: #e8c04a;
    border-color: #e8c04a;
    box-shadow: 0 0 24px rgba(201, 162, 39, 0.25);
}

/* ---------- Footer ---------- */
/* ============================================
   FOOTER — 4-column grid
   ============================================ */
.site-footer {
    background: var(--color-bg-deep);
    padding: 80px 0 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    font-family: var(--font-heading);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin: 0 0 1rem 0;
}

.footer-col ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-col li {
    margin-bottom: 0.5rem;
}

.footer-col a {
    font-family: var(--font-body);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-col a:hover {
    color: var(--color-accent);
}

.footer-col p {
    font-family: var(--font-body);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0;
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
    font-size: 0.8125rem;
    color: var(--color-text-dim);
}

.footer-bottom p {
    margin: 0;
}

.footer-evidence a {
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-evidence a:hover {
    color: var(--color-accent);
}

/* ---------- Footer Social Icons ---------- */
.footer-social {
    display: flex;
    gap: 20px;
    margin-top: 20px;
}

.footer-social-link {
    display: flex;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
    text-decoration: none;
}

.footer-social-link:hover {
    color: var(--color-accent);
}

/* ---------- Epigraph Float ---------- */
.epigraph-float {
    position: fixed;
    bottom: 20px;
    right: 20px;
    font-family: var(--font-body);
    font-size: 0.6875rem;
    font-style: italic;
    color: var(--color-text-dim);
    opacity: 0;
    transition: opacity var(--transition-slow);
    pointer-events: none;
    z-index: 10;
    max-width: 240px;
    text-align: right;
}

.epigraph-float.visible {
    opacity: 0.4;
}

/* ---------- Animations ---------- */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(1); }
    50% { opacity: 0.7; transform: scaleY(1.2); }
}

/* Scroll-triggered fade-in */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- Back to Top ---------- */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 44px;
    height: 44px;
    background: rgba(10, 10, 10, 0.85);
    border: 1px solid rgba(201, 162, 39, 0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease, background 0.3s ease;
    z-index: 90;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: rgba(201, 162, 39, 0.15);
    border-color: var(--color-accent);
}

.back-to-top svg {
    width: 18px;
    height: 18px;
    stroke: var(--color-accent);
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* ================================================
   FAQ Section — Visible FAQs on /analysis + /organizations
   ================================================ */
.faq-section {
    padding-top: var(--section-padding);
    border-top: 1px solid var(--color-border);
}

.faq-heading {
    font-family: var(--font-heading);
    font-size: 1.375rem;
    font-weight: 400;
    color: var(--color-text-secondary);
    letter-spacing: 0.03em;
    margin-bottom: 2rem;
}

/* Kill browser-default disclosure triangles */
.faq-question::-webkit-details-marker {
    display: none;
}
.faq-question {
    list-style: none;
}

.faq-item {
    border-bottom: 1px solid var(--color-border);
}

.faq-question {
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    padding: 1.25rem 2rem 1.25rem 0;
    cursor: pointer;
    position: relative;
    transition: color 0.2s ease;
}

.faq-question:hover {
    color: var(--color-text-primary);
}

details[open] > .faq-question {
    color: var(--color-accent);
}

/* Expand/collapse indicator */
.faq-question::after {
    content: '+';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.25rem;
    color: var(--color-text-muted);
    flex-shrink: 0;
    transition: color 0.2s ease;
}

details[open] > .faq-question::after {
    content: '−';
    color: var(--color-accent);
}

.faq-answer {
    padding: 0 0 1.25rem 0;
    max-width: 680px;
}

.faq-answer p {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.75;
    color: var(--color-text-muted);
    margin: 0;
}

.faq-answer p + p {
    margin-top: 0.75rem;
}

/* ---------- Responsive ---------- */
@media (max-width: 920px) {
    .nav-links {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgb(10, 10, 10);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 28px;
        z-index: 200;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links a {
        font-size: 1.25rem;
    }

    .nav-toggle {
        display: flex;
        z-index: 201;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    .book-layout {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .book-cover-container {
        max-width: 280px;
        margin: 0 auto;
    }

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

    .fieldguide-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .fieldguide-preview {
        justify-content: center;
    }

    .fieldguide-preview img {
        width: 260px;
    }

    .newsletter-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }

    .placeholder-form {
        flex-direction: column;
        gap: 0;
    }

    .placeholder-form input {
        border-right: 1px solid var(--color-border);
        border-bottom: none;
    }

    .placeholder-form button {
        width: 100%;
    }

    .epigraph-float {
        display: none;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.25rem;
    }

    .hero-subtitle {
        font-size: 1.125rem;
    }

    .section-heading {
        font-size: 1.75rem;
    }

    .frequency-name {
        font-size: 1.25rem;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }
}

/* ---------- Utility: Visually Hidden ---------- */
/* Keeps content in DOM for crawlers/screen readers, invisible to sighted users */
.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;
}