:root {
    --ivory: #F4EFE6;
    --ivory-deep: #EBE4D8;
    --ivory-card: #FAF7F2;
    --ivory-pure: #FDFCF9;
    --slate: #1A1916;
    --slate-mid: #2C2A27;
    --slate-soft: #4B4843;
    --stone: #8A8278;
    --stone-light: #B5AFA8;
    --parchment: #D6CCB8;
    --gold: #A8864A;
    --gold-warm: #C4A96A;
    --gold-muted: #7A6535;
    --burgundy: #6B2737;
    --rule: rgba(26, 25, 22, 0.10);
    --rule-gold: rgba(168, 134, 74, 0.28);
    --font-serif: 'Cormorant Garamond', 'Georgia', serif;
    --font-sans: 'Alegreya', Georgia, serif;
    --gradient-gold: linear-gradient(135deg, #A8864A 0%, #C4A96A 50%, #8C7040 100%);
    --shadow-lift: 0 4px 40px rgba(26, 25, 22, 0.12);
    --transition: 0.45s cubic-bezier(0.25, 0.1, 0.25, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; font-size: 18px; }

body {
    font-family: var(--font-sans);
    background: var(--ivory);
    color: var(--slate);
    line-height: 1.85;
    font-weight: 400;
    font-size: 18px;
    overflow-x: hidden;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ── NAVBAR ────────────────────────── */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    padding: 16px 0;
    background: rgba(244, 239, 230, 0.96);
    backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--rule);
    transition: var(--transition);
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.nav-home {
    font-family: var(--font-serif);
    font-size: 0.85rem;
    font-weight: 400;
    letter-spacing: 0.14em;
    color: var(--stone);
    display: flex;
    align-items: center;
    gap: 10px;
    transition: color var(--transition);
    white-space: nowrap;
}

.nav-home:hover { color: var(--slate); }

.nav-home svg { opacity: 0.5; }

.nav-title {
    font-family: var(--font-sans);
    font-size: 0.62rem;
    font-weight: 400;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--gold-muted);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 0;
}

.nav-links a {
    font-family: var(--font-sans);
    font-size: 0.64rem;
    font-weight: 400;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--stone);
    padding: 6px 14px;
    border-right: 1px solid var(--rule);
    transition: color var(--transition);
}

.nav-links a:first-child { border-left: 1px solid var(--rule); }
.nav-links a:hover { color: var(--slate); }
.nav-links a.active { color: var(--gold-muted); }

/* Progress bar */
.progress-bar {
    position: fixed;
    top: 0; left: 0;
    height: 2px;
    background: var(--gradient-gold);
    z-index: 1001;
    width: 0%;
    transition: width 0.1s linear;
}

/* ── HERO ──────────────────────────── */
.hero {
    background: var(--slate);
    min-height: 80vh;
    display: flex;
    align-items: flex-end;
    position: relative;
    overflow: hidden;
    padding-top: 72px;
}

.hero-texture {
    position: absolute;
    inset: 0;
    background-image:
        repeating-linear-gradient(
            45deg,
            transparent,
            transparent 60px,
            rgba(168, 134, 74, 0.025) 60px,
            rgba(168, 134, 74, 0.025) 61px
        );
}

.hero-vert {
    position: absolute;
    left: 50%;
    top: 0; bottom: 0;
    width: 1px;
    background: linear-gradient(to bottom, transparent, rgba(168, 134, 74, 0.18) 30%, rgba(168, 134, 74, 0.18) 70%, transparent);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 80px 40px 100px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: end;
}

.hero-left { }

.hero-tag {
    font-family: var(--font-sans);
    font-size: 0.60rem;
    font-weight: 400;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    color: var(--gold-warm);
    margin-bottom: 28px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.hero-tag::before {
    content: '';
    display: block;
    width: 32px;
    height: 1px;
    background: var(--gold);
    opacity: 0.5;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(2.8rem, 5.5vw, 5.2rem);
    font-weight: 300;
    font-style: italic;
    line-height: 1.06;
    color: var(--ivory);
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}

.hero-subtitle {
    font-family: var(--font-serif);
    font-size: clamp(1.1rem, 2vw, 1.6rem);
    font-weight: 300;
    font-style: italic;
    color: var(--gold-warm);
    margin-bottom: 36px;
    opacity: 0.75;
}

.hero-desc {
    font-family: var(--font-sans);
    font-size: 1.0rem;
    color: rgba(244, 239, 230, 0.45);
    line-height: 2;
    font-weight: 400;
    max-width: 480px;
}

.hero-right {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding-bottom: 8px;
}

.hero-stat {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    border: 1px solid rgba(244, 239, 230, 0.07);
    border-bottom: none;
    transition: background var(--transition);
}

.hero-stat:last-child { border-bottom: 1px solid rgba(244, 239, 230, 0.07); }
.hero-stat:hover { background: rgba(244, 239, 230, 0.03); }

.stat-label {
    font-family: var(--font-sans);
    font-size: 0.62rem;
    font-weight: 400;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: rgba(244, 239, 230, 0.32);
}

.stat-value {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    font-weight: 300;
    color: var(--gold-warm);
}

/* ── SECTION SHARED ─────────────────── */
section { padding: 120px 0; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

.section-tag {
    display: inline-block;
    font-family: var(--font-sans);
    font-size: 0.58rem;
    font-weight: 500;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    color: var(--gold);
    padding-bottom: 5px;
    border-bottom: 1px solid var(--rule-gold);
    margin-bottom: 20px;
}

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 3.5vw, 3rem);
    font-weight: 300;
    font-style: italic;
    line-height: 1.2;
    color: var(--slate);
    margin-bottom: 16px;
    font-feature-settings: "kern" 1, "liga" 1;
}

.section-desc {
    font-family: var(--font-sans);
    color: var(--stone);
    font-size: 1.05rem;
    font-weight: 400;
    line-height: 2;
    max-width: 560px;
    letter-spacing: 0.01em;
}

/* ── TIMELINE ───────────────────────── */
.timeline-section {
    background: var(--ivory-pure);
    border-top: 1px solid var(--rule);
}

.timeline-header {
    text-align: center;
    margin-bottom: 100px;
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.timeline-spine {
    position: absolute;
    left: 50%;
    top: 0; bottom: 0;
    width: 1px;
    background: linear-gradient(to bottom, transparent, var(--rule-gold) 5%, var(--rule-gold) 95%, transparent);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 40px 1fr;
    gap: 0;
    margin-bottom: 0;
}

.timeline-item:nth-child(even) .timeline-content {
    grid-column: 3;
    grid-row: 1;
    padding-left: 40px;
    padding-right: 0;
    text-align: left;
}

.timeline-item:nth-child(even) .timeline-spacer {
    grid-column: 1;
    grid-row: 1;
}

.timeline-item:nth-child(even) .timeline-center {
    grid-column: 2;
    grid-row: 1;
}

.timeline-item:nth-child(odd) .timeline-content {
    grid-column: 1;
    text-align: right;
    padding-right: 40px;
}

.timeline-item:nth-child(odd) .timeline-spacer {
    grid-column: 3;
}

.timeline-item:nth-child(odd) .timeline-center {
    grid-column: 2;
}

.timeline-center {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0 0 48px 0;
}

.timeline-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--ivory-pure);
    border: 1px solid var(--rule-gold);
    position: relative;
    z-index: 2;
    flex-shrink: 0;
    margin-top: 8px;
    transition: background var(--transition), border-color var(--transition);
}

.timeline-item:hover .timeline-dot {
    background: var(--gold);
    border-color: var(--gold);
}

.timeline-line {
    flex: 1;
    width: 1px;
    background: transparent;
}

.timeline-spacer { }

.timeline-content {
    padding-bottom: 48px;
}

.timeline-year {
    font-family: var(--font-serif);
    font-size: 2.4rem;
    font-weight: 300;
    color: rgba(168, 134, 74, 0.18);
    line-height: 1;
    margin-bottom: 6px;
    transition: color var(--transition);
}

.timeline-item:hover .timeline-year {
    color: var(--gold-warm);
}

.timeline-event-title {
    font-family: var(--font-serif);
    font-size: 1.35rem;
    font-weight: 400;
    font-style: italic;
    color: var(--slate);
    margin-bottom: 12px;
    line-height: 1.35;
    font-feature-settings: "kern" 1, "liga" 1;
}

.timeline-text {
    font-family: var(--font-sans);
    font-size: 1.02rem;
    color: var(--stone);
    line-height: 1.95;
    font-weight: 400;
    letter-spacing: 0.01em;
}

.timeline-context {
    display: inline-block;
    font-family: var(--font-sans);
    font-size: 0.58rem;
    font-weight: 400;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--gold-muted);
    margin-top: 14px;
    padding: 4px 10px;
    border: 1px solid var(--rule-gold);
}

/* ── PHILOSOPHY ─────────────────────── */
.philosophy-section {
    background: var(--slate);
}

.philosophy-section .section-tag { color: var(--gold-warm); }
.philosophy-section .section-title { color: var(--ivory); }
.philosophy-section .section-desc { color: rgba(244, 239, 230, 0.42); }

.philosophy-header {
    text-align: center;
    margin-bottom: 90px;
}

.thinker-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1px;
    background: rgba(244, 239, 230, 0.06);
    border: 1px solid rgba(244, 239, 230, 0.06);
}

.thinker-card {
    background: var(--slate-mid);
    padding: 56px 48px;
    position: relative;
    overflow: hidden;
    transition: background var(--transition);
}

.thinker-card:hover {
    background: #242220;
}

.thinker-num {
    font-family: var(--font-serif);
    font-size: 5rem;
    font-weight: 300;
    font-style: italic;
    color: rgba(168, 134, 74, 0.08);
    line-height: 1;
    position: absolute;
    top: 24px;
    right: 36px;
    user-select: none;
}

.thinker-tag {
    font-family: var(--font-sans);
    font-size: 0.58rem;
    font-weight: 400;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--gold-muted);
    margin-bottom: 20px;
}

.thinker-name {
    font-family: var(--font-serif);
    font-size: 1.9rem;
    font-weight: 300;
    font-style: italic;
    color: var(--ivory);
    margin-bottom: 4px;
    line-height: 1.2;
}

.thinker-dates {
    font-family: var(--font-sans);
    font-size: 0.68rem;
    font-weight: 400;
    letter-spacing: 0.12em;
    color: var(--stone);
    margin-bottom: 6px;
}

.thinker-work {
    font-family: var(--font-serif);
    font-size: 0.90rem;
    font-style: italic;
    color: var(--gold-warm);
    opacity: 0.7;
    margin-bottom: 28px;
}

.thinker-rule {
    width: 36px;
    height: 1px;
    background: var(--rule-gold);
    margin-bottom: 28px;
}

.thinker-concept {
    font-family: var(--font-serif);
    font-size: 1.42rem;
    font-weight: 400;
    font-style: italic;
    color: var(--gold-warm);
    margin-bottom: 20px;
    line-height: 1.4;
    font-feature-settings: "kern" 1, "liga" 1;
}

.thinker-body {
    font-family: var(--font-sans);
    font-size: 1.04rem;
    color: rgba(244, 239, 230, 0.52);
    line-height: 2.05;
    font-weight: 400;
    margin-bottom: 20px;
    letter-spacing: 0.01em;
}

.thinker-body em {
    font-style: italic;
    color: rgba(244, 239, 230, 0.80);
}

.thinker-quote {
    border-left: 1px solid var(--rule-gold);
    padding-left: 22px;
    font-family: var(--font-serif);
    font-size: 1.12rem;
    font-style: italic;
    color: rgba(244, 239, 230, 0.42);
    line-height: 1.75;
    font-feature-settings: "kern" 1, "liga" 1;
}

/* ── IDEOLOGY ───────────────────────── */
.ideology-section {
    background: var(--ivory-deep);
    border-top: 1px solid var(--rule);
}

.ideology-header {
    max-width: 620px;
    margin-bottom: 80px;
}

.ideology-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0;
    border: 1px solid var(--rule);
}

.ideology-card {
    padding: 48px 44px;
    border-right: 1px solid var(--rule);
    border-bottom: 1px solid var(--rule);
    transition: background var(--transition);
    position: relative;
}

.ideology-card:nth-child(2n) { border-right: none; }
.ideology-card:nth-last-child(-n+2) { border-bottom: none; }

.ideology-card:hover { background: rgba(26, 25, 22, 0.025); }

.ideology-card::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 1px;
    background: var(--gradient-gold);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.6s ease;
}

.ideology-card:hover::after { transform: scaleX(1); }

.ideology-num {
    font-family: var(--font-serif);
    font-size: 3.2rem;
    font-weight: 300;
    font-style: italic;
    color: rgba(168, 134, 74, 0.12);
    line-height: 1;
    margin-bottom: 24px;
}

.ideology-title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 400;
    font-style: italic;
    color: var(--slate);
    margin-bottom: 16px;
}

.ideology-body {
    font-family: var(--font-sans);
    font-size: 1.04rem;
    color: var(--stone);
    line-height: 2.0;
    font-weight: 400;
    letter-spacing: 0.01em;
}

.ideology-body em {
    font-style: italic;
    color: var(--slate-soft);
}

/* ── SOCIAL EVIDENCE ────────────────── */
.evidence-section {
    background: var(--ivory-pure);
    border-top: 1px solid var(--rule);
}

.evidence-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 100px;
    align-items: start;
}

.evidence-intro { }

.evidence-intro p {
    font-family: var(--font-sans);
    font-size: 1.05rem;
    color: var(--stone);
    line-height: 2.0;
    font-weight: 400;
    margin-bottom: 22px;
    letter-spacing: 0.01em;
}

.evidence-table {
    border: 1px solid var(--rule);
    overflow: hidden;
}

.evidence-row {
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    border-bottom: 1px solid var(--rule);
    transition: background var(--transition);
}

.evidence-row:last-child { border-bottom: none; }
.evidence-row:hover { background: rgba(168, 134, 74, 0.03); }

.ev-finding {
    padding: 18px 22px;
    font-family: var(--font-sans);
    font-size: 0.96rem;
    font-weight: 400;
    color: var(--slate);
    border-right: 1px solid var(--rule);
    letter-spacing: 0.01em;
}

.ev-interpretation {
    padding: 18px 22px;
    font-family: var(--font-sans);
    font-size: 0.96rem;
    color: var(--stone);
    font-weight: 400;
    line-height: 1.8;
    letter-spacing: 0.01em;
}

.evidence-row.header .ev-finding,
.evidence-row.header .ev-interpretation {
    font-size: 0.58rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--gold-muted);
    background: rgba(168, 134, 74, 0.05);
}

/* ── RESEARCH LIBRARY ───────────────── */
.library-section {
    background: var(--ivory-deep);
    border-top: 1px solid var(--rule);
}

.library-header {
    text-align: center;
    margin-bottom: 72px;
}

.library-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    border: 1px solid var(--rule);
}

.library-card {
    padding: 36px 32px;
    border-right: 1px solid var(--rule);
    border-bottom: 1px solid var(--rule);
    background: var(--ivory-card);
    transition: background var(--transition), box-shadow var(--transition);
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 12px;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
}

.library-card:nth-child(3n) { border-right: none; }
.library-card:nth-last-child(-n+3) { border-bottom: none; }

.library-card:hover {
    background: var(--ivory-pure);
    box-shadow: var(--shadow-lift);
    z-index: 1;
}

.lib-type {
    font-family: var(--font-sans);
    font-size: 0.56rem;
    font-weight: 500;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--gold-muted);
}

.lib-title {
    font-family: var(--font-serif);
    font-size: 1.28rem;
    font-weight: 400;
    font-style: italic;
    color: var(--slate);
    line-height: 1.35;
}

.lib-desc {
    font-family: var(--font-sans);
    font-size: 0.98rem;
    color: var(--stone);
    line-height: 1.85;
    font-weight: 400;
    flex: 1;
    letter-spacing: 0.01em;
}

.lib-tag {
    display: inline-block;
    font-family: var(--font-sans);
    font-size: 0.58rem;
    font-weight: 400;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--stone-light);
    border: 1px solid var(--rule);
    padding: 4px 10px;
    margin-top: 8px;
    transition: color var(--transition), border-color var(--transition);
}

.library-card:hover .lib-tag {
    color: var(--gold-muted);
    border-color: var(--rule-gold);
}

/* ── FOOTER ─────────────────────────── */
.footer {
    background: #0E0D0C;
    padding: 48px 0 32px;
    border-top: 1px solid rgba(244, 239, 230, 0.05);
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer-left {
    font-family: var(--font-sans);
    font-size: 0.72rem;
    font-weight: 400;
    color: rgba(244, 239, 230, 0.22);
    letter-spacing: 0.06em;
}

.footer-right {
    font-family: var(--font-serif);
    font-size: 0.82rem;
    font-style: italic;
    color: rgba(168, 134, 74, 0.28);
}

/* ── SCROLL TO TOP ──────────────────── */
.scroll-top {
    position: fixed;
    bottom: 36px; right: 36px;
    width: 40px; height: 40px;
    background: var(--slate);
    color: var(--gold-warm);
    border: 1px solid rgba(168, 134, 74, 0.30);
    font-size: 0.9rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: var(--transition);
    z-index: 999;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-top:hover {
    background: var(--gold);
    color: var(--ivory-pure);
    border-color: transparent;
}

/* ── REVEAL ─────────────────────────── */
.reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.75s ease, transform 0.75s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ── RESPONSIVE ─────────────────────── */
@media (max-width: 1024px) {
    .thinker-grid { grid-template-columns: 1fr; }
    .thinker-card { border-right: none; }
    .evidence-layout { grid-template-columns: 1fr; gap: 60px; }
    .library-grid { grid-template-columns: repeat(2, 1fr); }
    .library-card:nth-child(3n) { border-right: 1px solid var(--rule); }
    .library-card:nth-child(2n) { border-right: none; }
    .library-card:nth-last-child(-n+3) { border-bottom: 1px solid var(--rule); }
    .library-card:nth-last-child(-n+2) { border-bottom: none; }
    .hero-content { grid-template-columns: 1fr; gap: 56px; }
    .hero-vert { display: none; }
}

@media (max-width: 768px) {
    section { padding: 80px 0; }
    .container { padding: 0 24px; }
    .nav-inner { padding: 0 24px; }
    .nav-links { display: none; }
    .hero-content { padding: 60px 24px 80px; }
    .timeline { padding: 0 24px; }
    .timeline-spine { left: 20px; transform: none; }
    .timeline-item { grid-template-columns: 40px 1fr; }
    .timeline-item:nth-child(odd) .timeline-content,
    .timeline-item:nth-child(even) .timeline-content {
        grid-column: 2;
        grid-row: 1;
        text-align: left;
        padding-left: 24px;
        padding-right: 0;
    }
    .timeline-item:nth-child(odd) .timeline-spacer,
    .timeline-item:nth-child(even) .timeline-spacer { display: none; }
    .timeline-item:nth-child(odd) .timeline-center,
    .timeline-item:nth-child(even) .timeline-center { grid-column: 1; }
    .ideology-grid { grid-template-columns: 1fr; }
    .ideology-card { border-right: none; }
    .ideology-card:nth-child(2n) { border-right: none; }
    .library-grid { grid-template-columns: 1fr; }
    .library-card:nth-child(3n),
    .library-card:nth-child(2n) { border-right: none; }
    .library-card:nth-last-child(-n+3),
    .library-card:nth-last-child(-n+2) { border-bottom: 1px solid var(--rule); }
    .library-card:last-child { border-bottom: none; }
    .thinker-card { padding: 40px 28px; }
    .footer-inner { flex-direction: column; gap: 12px; text-align: center; }
}