/* ============================================
   The Eternal Argument — Global Styles
   Dark/Cinematic Theme
   ============================================ */

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

:root {
    --bg-deep: #0a0a0f;
    --bg-surface: #111827;
    --bg-card: rgba(255, 255, 255, 0.05);
    --bg-card-hover: rgba(255, 255, 255, 0.08);
    --border-subtle: rgba(255, 255, 255, 0.1);
    --border-hover: rgba(255, 255, 255, 0.2);
    --text-primary: #f9fafb;
    --text-body: #e5e7eb;
    --text-muted: #9ca3af;
    --text-dim: #6b7280;
    --accent-gold: #d4a843;
    --era-1: #c9a84c;
    --era-2: #3b82f6;
    --era-3: #ef4444;
    --era-4: #8b5cf6;
    --era-5: #06b6d4;
    --era-6: #22c55e;
    --era-7: #f97316;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Georgia', 'Times New Roman', serif;
    line-height: 1.7;
    color: var(--text-body);
    background: var(--bg-deep);
    min-height: 100vh;
}

a {
    color: var(--accent-gold);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #e8c05a;
}

/* --- Progress Bar --- */
.progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-gold), #e8c05a);
    z-index: 1001;
    transition: width 0.15s ease;
}

/* --- Navigation / Search Bar --- */
.top-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    transform: translateY(-100%);
    transition: transform 0.3s ease;
}

.top-bar.visible {
    transform: translateY(0);
}

.top-bar .site-title {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent-gold);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.search-container {
    position: relative;
}

.search-input {
    padding: 0.5rem 1rem 0.5rem 2.5rem;
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-body);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.85rem;
    width: 250px;
    transition: all 0.3s ease;
    outline: none;
}

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

.search-input:focus {
    border-color: var(--accent-gold);
    background: rgba(255, 255, 255, 0.08);
    width: 300px;
}

.search-icon {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-dim);
    font-size: 0.85rem;
}

.search-results {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    width: 400px;
    max-height: 400px;
    overflow-y: auto;
    background: rgba(17, 24, 39, 0.98);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    display: none;
    z-index: 200;
}

.search-results.active {
    display: block;
}

.search-result-item {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-subtle);
    cursor: pointer;
    transition: background 0.2s ease;
}

.search-result-item:last-child {
    border-bottom: none;
}

.search-result-item:hover {
    background: rgba(255, 255, 255, 0.05);
}

.search-result-item .ep-number {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.75rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.search-result-item .ep-title {
    color: var(--text-primary);
    font-size: 0.9rem;
    margin-top: 0.15rem;
}

.search-result-item .ep-focus {
    color: var(--text-muted);
    font-size: 0.8rem;
    font-style: italic;
}

/* --- Hero Section (Landing Page) --- */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 400px;
    background: radial-gradient(ellipse at center, rgba(212, 168, 67, 0.06) 0%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero-label {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.8rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--accent-gold);
    margin-bottom: 1.5rem;
    opacity: 0;
    animation: fadeIn 1s ease 0.3s forwards;
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 400;
    color: var(--text-primary);
    line-height: 1.15;
    margin-bottom: 1.5rem;
    opacity: 0;
    animation: fadeIn 1s ease 0.6s forwards;
}

.hero .tagline {
    font-size: clamp(1rem, 2.5vw, 1.4rem);
    color: var(--text-muted);
    font-style: italic;
    margin-bottom: 2.5rem;
    opacity: 0;
    animation: fadeIn 1s ease 0.9s forwards;
}

.hero .episode-count {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.85rem;
    color: var(--text-dim);
    letter-spacing: 0.1em;
    opacity: 0;
    animation: fadeIn 1s ease 1.2s forwards;
}

.hero .episode-count span {
    color: var(--accent-gold);
    font-weight: 600;
}

.cta-button {
    display: inline-block;
    margin-top: 2rem;
    padding: 0.65rem 1.75rem;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.8rem;
    font-weight: 400;
    letter-spacing: 0.1em;
    color: var(--text-dim);
    background: transparent;
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.3s ease;
    opacity: 0;
    animation: fadeIn 1s ease 1.2s forwards;
}

.cta-button:hover {
    color: var(--accent-gold);
    border-color: var(--accent-gold);
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    animation: fadeIn 1s ease 1.5s forwards, float 2s ease-in-out infinite 2s;
}

.scroll-indicator::after {
    content: '';
    display: block;
    width: 2px;
    height: 40px;
    background: linear-gradient(to bottom, var(--accent-gold), transparent);
    margin: 0 auto;
}

/* --- Era Timeline (Landing Page) --- */
.eras-section {
    max-width: 900px;
    margin: 0 auto;
    padding: 4rem 2rem 6rem;
}

.section-heading {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.8rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--text-dim);
    text-align: center;
    margin-bottom: 3rem;
}

.era-timeline {
    position: relative;
    padding-left: 3rem;
}

.era-timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(
        to bottom,
        var(--era-1),
        var(--era-2),
        var(--era-3),
        var(--era-4),
        var(--era-5),
        var(--era-6),
        var(--era-7)
    );
}

.era-card {
    display: block;
    position: relative;
    margin-bottom: 2rem;
    padding: 1.5rem 2rem;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateX(-20px);
    text-decoration: none;
}

.era-card.visible {
    opacity: 1;
    transform: translateX(0);
}

.era-card::before {
    content: '';
    position: absolute;
    left: -3rem;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 3px solid var(--border-subtle);
    background: var(--bg-deep);
    transition: all 0.3s ease;
    z-index: 1;
}

.era-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateX(4px);
}

.era-card:hover::before {
    transform: translate(-50%, -50%) scale(1.3);
}

.era-card[data-era="1"]::before { border-color: var(--era-1); }
.era-card[data-era="1"]:hover { box-shadow: 0 0 30px rgba(201, 168, 76, 0.1); }
.era-card[data-era="2"]::before { border-color: var(--era-2); }
.era-card[data-era="2"]:hover { box-shadow: 0 0 30px rgba(59, 130, 246, 0.1); }
.era-card[data-era="3"]::before { border-color: var(--era-3); }
.era-card[data-era="3"]:hover { box-shadow: 0 0 30px rgba(239, 68, 68, 0.1); }
.era-card[data-era="4"]::before { border-color: var(--era-4); }
.era-card[data-era="4"]:hover { box-shadow: 0 0 30px rgba(139, 92, 246, 0.1); }
.era-card[data-era="5"]::before { border-color: var(--era-5); }
.era-card[data-era="5"]:hover { box-shadow: 0 0 30px rgba(6, 182, 212, 0.1); }
.era-card[data-era="6"]::before { border-color: var(--era-6); }
.era-card[data-era="6"]:hover { box-shadow: 0 0 30px rgba(34, 197, 94, 0.1); }
.era-card[data-era="7"]::before { border-color: var(--era-7); }
.era-card[data-era="7"]:hover { box-shadow: 0 0 30px rgba(249, 115, 22, 0.1); }

.era-card .era-number {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 0.3rem;
}

.era-card .era-title {
    font-size: 1.4rem;
    color: var(--text-primary);
    font-weight: 400;
    margin-bottom: 0.3rem;
}

.era-card .era-subtitle {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.era-card .era-desc {
    font-size: 0.9rem;
    color: var(--text-dim);
    font-style: italic;
    margin-bottom: 0.75rem;
    line-height: 1.5;
}

.era-card .era-meta {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.75rem;
    color: var(--text-dim);
    letter-spacing: 0.05em;
}

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

/* --- Era Page Header --- */
.era-header {
    padding: 6rem 2rem 3rem;
    text-align: center;
    position: relative;
}

.era-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 2px;
    background: var(--accent-gold);
}

.era-header .back-link {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.8rem;
    color: var(--text-dim);
    letter-spacing: 0.05em;
    display: inline-block;
    margin-bottom: 2rem;
    transition: color 0.3s ease;
}

.era-header .back-link:hover {
    color: var(--accent-gold);
}

.era-header .era-number-large {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.8rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 0.75rem;
}

.era-header h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 400;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.era-header .era-period {
    font-size: 1.1rem;
    color: var(--text-muted);
    font-style: italic;
    margin-bottom: 1rem;
}

.era-header .era-description {
    font-size: 1rem;
    color: var(--text-dim);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* --- Section Groups (Era Page) --- */
.sections-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 3rem 2rem 4rem;
}

.section-group {
    margin-bottom: 3rem;
}

.section-group-header {
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-subtle);
}

.section-group-header h2 {
    font-size: 1.3rem;
    font-weight: 400;
    color: var(--text-primary);
}

.section-group-header .section-subtitle {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.8rem;
    color: var(--text-dim);
    font-style: italic;
    margin-top: 0.25rem;
}

/* --- Episode Cards (Era Page) --- */
.episode-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.episode-card {
    display: flex;
    align-items: flex-start;
    gap: 1.25rem;
    padding: 1.25rem 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.episode-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateX(4px);
}

.episode-card .ep-num {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.75rem;
    color: var(--text-dim);
    min-width: 2.5rem;
    padding-top: 0.2rem;
    letter-spacing: 0.05em;
}

.episode-card .ep-info {
    flex: 1;
}

.episode-card .ep-title {
    font-size: 1.05rem;
    color: var(--text-primary);
    margin-bottom: 0.2rem;
    line-height: 1.4;
}

.episode-card .ep-focus {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-style: italic;
}

.episode-card .ep-concept {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.75rem;
    color: var(--text-dim);
    margin-top: 0.4rem;
    line-height: 1.4;
}

.episode-card .ep-badge {
    font-size: 0.6rem;
    color: var(--accent-gold);
    padding-top: 0.3rem;
    opacity: 0.7;
}

.episode-card .ep-soon {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.6rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text-dim);
    padding-top: 0.3rem;
    opacity: 0.5;
}

.episode-card .ep-arrow {
    color: var(--text-dim);
    font-size: 1rem;
    padding-top: 0.2rem;
    transition: transform 0.3s ease, color 0.3s ease;
}

.episode-card:hover .ep-arrow {
    transform: translateX(4px);
    color: var(--accent-gold);
}

/* --- Episode Page --- */
.episode-header {
    padding: 6rem 2rem 3rem;
    max-width: 750px;
    margin: 0 auto;
}

.episode-header .breadcrumb {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.episode-header .breadcrumb a {
    color: var(--text-dim);
}

.episode-header .breadcrumb a:hover {
    color: var(--accent-gold);
}

.episode-header .breadcrumb .separator {
    color: var(--text-dim);
    opacity: 0.5;
}

.title-nav-row {
    display: flex;
    align-items: center;
    max-width: 100vw;
    margin: 0 -2rem;
    padding: 0 2rem;
}

.title-nav-row h1 {
    flex: 1;
    text-align: center;
}

.title-nav-link {
    flex-shrink: 0;
    font-size: 2rem;
    color: var(--text-dim);
    text-decoration: none;
    padding: 0.25rem 0.75rem;
    opacity: 0.4;
    transition: all 0.3s ease;
}

.title-nav-link:hover {
    opacity: 1;
    color: var(--accent-gold);
}

.episode-header .ep-label {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.8rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 0.75rem;
    text-align: center;
}

.episode-header h1 {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 400;
    color: var(--text-primary);
    line-height: 1.25;
    margin-bottom: 0.75rem;
}

.episode-header .ep-focus-line {
    font-size: 1.15rem;
    color: var(--text-muted);
    font-style: italic;
    text-align: center;
}

/* --- Episode Body --- */
.episode-body {
    max-width: 750px;
    margin: 0 auto;
    padding: 2rem 2rem 4rem;
}

.episode-section {
    margin-bottom: 2.5rem;
}

.episode-section h2 {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-subtle);
}

.episode-section p {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-body);
}

.highlight-box {
    padding: 1.5rem;
    background: var(--bg-card);
    border-left: 3px solid var(--accent-gold);
    border-radius: 0 10px 10px 0;
    margin-top: 0.5rem;
}

.highlight-box .label {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--accent-gold);
    margin-bottom: 0.4rem;
}

.highlight-box .value {
    font-size: 1.1rem;
    color: var(--text-primary);
    line-height: 1.6;
}

/* --- Transcript --- */
.transcript-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    background: none;
    border: none;
    border-bottom: 1px solid var(--border-subtle);
    padding: 0 0 0.5rem;
    margin-bottom: 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.transcript-toggle h2 {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--text-dim);
    margin: 0;
    border: none;
    padding: 0;
}

.transcript-toggle:hover h2 {
    color: var(--text-muted);
}

.toggle-icon {
    font-size: 1.2rem;
    color: var(--text-dim);
    transition: transform 0.3s ease;
}

.transcript-toggle[aria-expanded="true"] .toggle-icon {
    transform: rotate(90deg);
}

.transcript-content.collapsed {
    display: none;
}

.transcript-content {
    font-size: 1rem;
    line-height: 1.9;
    color: var(--text-body);
}

.transcript-content h1,
.transcript-content h2,
.transcript-content h3 {
    color: var(--text-primary);
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    font-weight: 400;
}

.transcript-content h1 { font-size: 1.4rem; }
.transcript-content h2 { font-size: 1.2rem; }
.transcript-content h3 { font-size: 1.05rem; }

.transcript-content p {
    margin-bottom: 1rem;
}

.transcript-content blockquote {
    border-left: 3px solid var(--accent-gold);
    padding-left: 1.25rem;
    margin: 1.5rem 0;
    color: var(--text-muted);
    font-style: italic;
}

.transcript-content strong {
    color: var(--text-primary);
}

/* --- Audio Player --- */
.audio-section {
    margin: 2rem 0 3rem;
    padding: 2rem;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    text-align: center;
}

.audio-section h2 {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 1rem;
    border: none;
    padding: 0;
}

.audio-section audio {
    width: 100%;
    max-width: 500px;
    border-radius: 8px;
}

.audio-coming-soon {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.9rem;
    color: var(--text-dim);
    font-style: italic;
}

/* --- Navigation (Prev/Next) --- */
.nav-footer {
    max-width: 750px;
    margin: 0 auto;
    padding: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    border-top: 1px solid var(--border-subtle);
}

.nav-btn {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    padding: 0.5rem 0;
    color: var(--text-body);
    text-decoration: none;
    transition: color 0.3s ease;
    max-width: 45%;
}

.nav-btn:hover {
    color: var(--accent-gold);
}

.nav-btn.next {
    text-align: right;
    margin-left: auto;
}

.nav-btn .nav-label {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-dim);
}

.nav-btn .nav-title {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.3;
}

.nav-btn:hover .nav-title {
    color: var(--text-primary);
}

/* --- Era Navigation (Prev/Next) --- */
.era-nav-footer {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    border-top: 1px solid var(--border-subtle);
}

/* --- Footer --- */
.site-footer {
    text-align: center;
    padding: 3rem 2rem;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.75rem;
    color: var(--text-dim);
    letter-spacing: 0.05em;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    border-top: 1px solid var(--border-subtle);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: var(--text-dim);
    font-size: 0.8rem;
    transition: color 0.3s ease;
}

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

/* --- About Page --- */
.about-page {
    max-width: 750px;
    margin: 0 auto;
    padding: 0 2rem;
}

.about-header {
    padding: 6rem 0 2rem;
}

.about-header .back-link {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.8rem;
    color: var(--text-dim);
    letter-spacing: 0.05em;
    display: inline-block;
    margin-bottom: 2rem;
    transition: color 0.3s ease;
}

.about-header .back-link:hover {
    color: var(--accent-gold);
}

.about-header h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 400;
    color: var(--text-primary);
}

.about-body {
    padding-bottom: 4rem;
}

.about-section {
    margin-bottom: 2.5rem;
}

.about-section h2 {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-subtle);
}

.about-section p {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-body);
    margin-bottom: 1rem;
}

.pyramid {
    margin: 2rem auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
}

.pyramid-row {
    width: var(--width, 50%);
    padding: 0.6rem 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 6px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 0.8rem;
    color: var(--text-muted);
    text-align: center;
    transition: all 0.3s ease;
}

.pyramid-row span {
    color: var(--accent-gold);
    font-weight: 600;
    margin-right: 0.5rem;
}

.pyramid-row:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
}

.about-section .cta-button {
    animation: none;
    opacity: 1;
}

@media (max-width: 768px) {
    .about-page {
        padding: 0 1.5rem;
    }

    .about-header {
        padding: 5rem 0 1.5rem;
    }

    .pyramid-row {
        width: calc(var(--width, 50%) + 20%) !important;
        max-width: 100%;
        font-size: 0.7rem;
        padding: 0.5rem 0.75rem;
    }
}

/* --- Animations --- */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes float {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(-10px); }
}

.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* --- Loading State --- */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 50vh;
    color: var(--text-dim);
    font-style: italic;
}

/* --- Error State --- */
.error-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 50vh;
    text-align: center;
    padding: 2rem;
}

.error-state h1 {
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.error-state p {
    color: var(--text-muted);
    margin-bottom: 2rem;
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .top-bar {
        padding: 0.75rem 1rem;
    }

    .search-input {
        width: 180px;
    }

    .search-input:focus {
        width: 200px;
    }

    .search-results {
        width: calc(100vw - 2rem);
        right: -0.5rem;
    }

    .hero {
        padding: 2rem 1.5rem;
    }

    .eras-section {
        padding: 3rem 1.5rem 4rem;
    }

    .era-timeline {
        padding-left: 2.5rem;
    }

    .era-card::before {
        left: -2.5rem;
    }

    .era-card {
        padding: 1.25rem 1.25rem;
    }

    .era-header {
        padding: 5rem 1.5rem 2.5rem;
    }

    .sections-container {
        padding: 2rem 1.5rem 3rem;
    }

    .episode-card {
        padding: 1rem 1.25rem;
    }

    .episode-header {
        padding: 5rem 1.5rem 2rem;
    }

    .episode-body {
        padding: 1.5rem 1.5rem 3rem;
    }

    .nav-footer,
    .era-nav-footer {
        padding: 2rem 1.5rem;
        flex-direction: column;
    }

    .nav-btn {
        max-width: 100%;
        width: 100%;
    }

    .nav-btn.next {
        text-align: left;
    }
}

@media (max-width: 480px) {
    .era-card .era-title {
        font-size: 1.2rem;
    }

    .episode-card {
        gap: 0.75rem;
    }

    .episode-card .ep-num {
        min-width: 2rem;
    }
}