/* ─── CSS Variables ──────────────────────────────────────────────────────────── */
:root {
  --black: #0a0a0a;
  --white: #fafafa;
  --gray-light: #f2f2f2;
  --gray-mid: #cfcfcf;
  --gray-dark: #5e5e5e;
  --accent: #0a0a0a;

  --sidebar-w: 272px;
  --font-main: "Inter", "SF Pro Text", "Segoe UI", "Helvetica Neue", Arial, sans-serif;

  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  --space-6: 64px;
  --space-7: 80px;

  --radius-sm: 10px;
  --radius-md: 20px;

  --glass-bg: rgba(255, 255, 255, 0.12);
  --glass-border: rgba(255, 255, 255, 0.28);
  --glass-border-soft: rgba(255, 255, 255, 0.12);
  --glass-blur: 18px;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --dur-fast: 220ms;
  --dur-med: 420ms;
  --dur-slow: 900ms;
}

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

html {
  font-size: 16px;
}

/* ─── Lenis Smooth Scroll ────────────────────────────────────────────────────── */
html.lenis, html.lenis body {
  height: auto;
}
.lenis.lenis-smooth {
  scroll-behavior: auto !important;
}
.lenis.lenis-smooth [data-lenis-prevent] {
  overscroll-behavior: contain;
}
.lenis.lenis-stopped {
  overflow: hidden;
}
.lenis.lenis-smooth iframe {
  pointer-events: none;
}

body {
  font-family: var(--font-main);
  background: var(--white);
  color: var(--black);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; background: none; border: none; font-family: inherit; }

/* ─── Layout ─────────────────────────────────────────────────────────────────── */
.layout {
  display: flex;
  min-height: 100vh;
}

/* ─── Sidebar ────────────────────────────────────────────────────────────────── */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-w);
  height: 100vh;
  background: var(--black);
  color: var(--white);
  display: flex;
  flex-direction: column;
  z-index: 100;
  overflow: hidden;
  transition: box-shadow 0.35s var(--ease-in-out);
}

.sidebar.is-scrolled {
  box-shadow: 2px 0 24px rgba(0, 0, 0, 0.18);
}

.sidebar-logo {
  display: block;
  padding: var(--space-5) var(--space-4) var(--space-4);
  border-bottom: 1px solid rgba(255,255,255,0.1);
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}

.logo-line {
  display: block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.logo-sub {
  display: block;
  font-size: 10px;
  letter-spacing: 0.25em;
  color: var(--gray-mid);
  margin-top: 4px;
  text-transform: uppercase;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-3) 0;
}

.sidebar-nav::-webkit-scrollbar { width: 0; }

.sidebar-nav ul { padding: 0; }

.sidebar-link {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  padding: 12px var(--space-4);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.45);
  transition: color 0.2s, background 0.2s;
  border-left: 2px solid transparent;
}

.sidebar-link:hover {
  color: var(--white);
  background: rgba(255,255,255,0.04);
}

.sidebar-link.active {
  color: var(--white);
  border-left-color: var(--white);
  background: rgba(255,255,255,0.05);
}

.nav-num {
  font-size: 9px;
  color: var(--gray-dark);
  min-width: 20px;
  font-weight: 700;
  transition: color 0.2s;
}

.sidebar-link.active .nav-num,
.sidebar-link:hover .nav-num {
  color: var(--gray-mid);
}

.sidebar-footer {
  padding: 20px var(--space-4);
  font-size: 10px;
  color: var(--gray-dark);
  letter-spacing: 0.1em;
  border-top: 1px solid rgba(255,255,255,0.08);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sidebar-compare-link {
  display: inline-flex;
  align-items: center;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.78);
  padding: 10px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.sidebar-compare-link:hover {
  color: var(--white);
}

/* ─── Main Content ───────────────────────────────────────────────────────────── */
.content {
  margin-left: var(--sidebar-w);
  flex: 1;
  padding: 0;
}

/* ─── Page Header ────────────────────────────────────────────────────────────── */
.page-header {
  padding: var(--space-7) var(--space-6) var(--space-6);
  border-bottom: 1px solid var(--gray-light);
}

.header-eyebrow {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gray-dark);
  margin-bottom: var(--space-2);
}

.page-title {
  font-size: clamp(48px, 6vw, 88px);
  font-weight: 680;
  letter-spacing: -0.03em;
  line-height: 0.9;
  text-transform: uppercase;
}

.page-intro {
  margin-top: var(--space-3);
  max-width: 62ch;
  color: var(--gray-dark);
  line-height: 1.7;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.control-label {
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--gray-dark);
  text-transform: uppercase;
  font-weight: 700;
}

.control-input {
  height: 44px;
  border: 1px solid var(--gray-mid);
  border-radius: var(--radius-sm);
  padding: 0 var(--space-2);
  font-size: 13px;
  font-family: inherit;
  color: var(--black);
  background: rgba(255, 255, 255, 0.85);
}

.control-input:focus {
  outline: none;
  border-color: #999;
}

.header-rule {
  margin-top: var(--space-4);
  width: 48px;
  height: 3px;
  background: var(--black);
}

/* ─── Era Sections — Full-Bleed with Liquid Glass ────────────────────────────── */
.era-section {
  position: sticky;
  top: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: var(--space-7) var(--space-6);
  overflow: hidden;
  isolation: isolate;
}

.era-section + .era-section {
  box-shadow: 0 -6px 40px rgba(0, 0, 0, 0.28);
}

/* Blurred background artwork */
.era-bg {
  position: absolute;
  inset: -40px; /* extra bleed so blur doesn't show edges */
  background-size: cover;
  background-position: center;
  filter: saturate(1.1) brightness(0.7);
  transform: scale(1.08);
  z-index: -2;
  will-change: transform;
  transition: filter 0.65s var(--ease-out);
}

.era-section:hover .era-bg {
  filter: saturate(1.12) brightness(0.78);
}

/* Dark gradient scrim for contrast floor */
.era-bg-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(110deg, rgba(0, 0, 0, 0.52) 0%, rgba(0, 0, 0, 0.18) 44%, rgba(0, 0, 0, 0.58) 100%),
    radial-gradient(circle at 75% 20%, rgba(255, 255, 255, 0.08), transparent 45%);
  z-index: -1;
}

/* ─── Liquid Glass Card ───────────────────────────────────────────────────────── */
/*
  Apple Liquid Glass recipe:
  1. backdrop-filter: blur() + saturate() — blurs what's behind
  2. background: rgba(white, low-alpha) — white wash for readability
  3. border: rgba(white, ~0.3) — specular edge highlight
  4. box-shadow: layered inset + drop — depth + refraction illusion
  5. border-radius: generous — fluid, organic feel
*/
.era-glass-card {
  position: relative;
  max-width: 680px;
  width: 100%;

  /* Glass substrate */
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(1.45) brightness(1.02);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.45) brightness(1.02);

  /* Specular edge + inner glow */
  border: 1px solid var(--glass-border);
  border-bottom-color: var(--glass-border-soft);
  border-right-color: var(--glass-border-soft);
  box-shadow:
    0 0 0 0.5px rgba(255, 255, 255, 0.08) inset,
    0 1px 0 rgba(255, 255, 255, 0.22) inset,
    0 24px 54px rgba(0, 0, 0, 0.32);

  border-radius: var(--radius-md);
  padding: var(--space-5) 52px;

  /* Subtle scale on hover */
  transition: transform var(--dur-med) var(--ease-out), box-shadow var(--dur-med) var(--ease-out);
}

.era-glass-card:hover {
  transform: scale(1.014) translateY(-4px);
  box-shadow:
    0 0 0 0.5px rgba(255, 255, 255, 0.10) inset,
    0 1px 0 rgba(255, 255, 255, 0.34) inset,
    0 34px 76px rgba(0, 0, 0, 0.38);
}

/* ─── Text inside glass — all white, high contrast ──────────────────────────── */
.era-meta {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 20px;
}

.era-number {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: rgba(255, 255, 255, 0.5);
}

.era-period {
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.55);
}

.era-title {
  font-size: clamp(28px, 3.5vw, 52px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 0.95;
  text-transform: uppercase;
  color: #ffffff;
  /* Crisp text shadow for legibility on any bg */
  text-shadow: 0 1px 12px rgba(0, 0, 0, 0.4);
  margin-bottom: 20px;
}

.era-description {
  font-size: 14px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.88);
  margin-bottom: 28px;
  max-width: 54ch;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
}

/* Highlights list */
.era-highlights {
  margin-bottom: var(--space-4);
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}

.era-highlights li {
  font-size: 11.5px;
  letter-spacing: 0.03em;
  color: rgba(255, 255, 255, 0.72);
  padding: 8px 0 8px 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  position: relative;
}

.era-highlights li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: rgba(255, 255, 255, 0.35);
}

/* ─── Learn More Button — glass variant ─────────────────────────────────────── */
.learn-more-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #ffffff;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.35);
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: background var(--dur-fast) var(--ease-out), border-color var(--dur-fast), transform var(--dur-fast) var(--ease-out);
}

.learn-more-btn:hover {
  background: rgba(255, 255, 255, 0.22);
  border-color: rgba(255, 255, 255, 0.6);
  transform: translateX(2px);
  color: #ffffff;
}

.btn-arrow {
  transition: transform 0.22s var(--ease-out);
}

.learn-more-btn:hover .btn-arrow {
  transform: translateX(5px);
}

/* ─── Fade / Slide-Up Entrance ───────────────────────────────────────────────── */
.fade-target {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out);
}

.fade-target.visible {
  opacity: 1;
  transform: translateY(0);
}
.mobile-top-bar {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  height: 52px;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  background: transparent;
  backdrop-filter: blur(0px);
  -webkit-backdrop-filter: blur(0px);
  box-shadow: none;
  transition:
    background 0.35s var(--ease-in-out),
    backdrop-filter 0.35s var(--ease-in-out),
    box-shadow 0.35s var(--ease-in-out),
    -webkit-backdrop-filter 0.35s var(--ease-in-out);
}

.mobile-top-bar.scrolled {
  background: rgba(250, 250, 250, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.08);
}

.mobile-logo-bar {
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--black);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 70%;
}

.mobile-top-bar:not(.scrolled) .mobile-logo-bar {
  text-shadow:
    0 0 6px rgba(250, 250, 250, 0.9),
    0 0 14px rgba(250, 250, 250, 0.5);
}

/* ─── Hamburger ──────────────────────────────────────────────────────────────── */
.hamburger {
  display: none;
  flex-shrink: 0;
  position: static;
  width: 44px;
  height: 44px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: var(--black);
  padding: 0;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--white);
  transition: transform 0.3s var(--ease-out), opacity 0.3s;
  transform-origin: center;
}

.hamburger.active span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.active span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ─── Mobile Overlay ─────────────────────────────────────────────────────────── */
.mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--black);
  z-index: 220;
  flex-direction: column;
  justify-content: center;
  padding: 60px 40px;
  transform: translateX(100%);
  transition: transform 0.45s var(--ease-out);
}

.mobile-overlay.open {
  transform: translateX(0);
}

.overlay-close {
  position: absolute;
  top: 20px;
  right: 20px;
  font-size: 32px;
  color: var(--white);
  line-height: 1;
  padding: 8px;
}

.overlay-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.overlay-link {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.6);
  font-size: 13px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: color 0.2s;
}

.overlay-link:hover,
.overlay-link.active {
  color: var(--white);
}

.overlay-link .nav-num {
  color: rgba(255,255,255,0.25);
}

/* ─── Responsive ─────────────────────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .era-section {
    padding: var(--space-6) var(--space-5);
    min-height: auto;
  }
  .era-glass-card {
    padding: 40px 40px;
  }
  .page-header {
    padding-left: var(--space-5);
    padding-right: var(--space-5);
  }
}

@media (max-width: 768px) {
  .mobile-top-bar {
    display: flex;
  }

  .sidebar { display: none; }

  .hamburger { display: flex; }

  .mobile-overlay { display: flex; }

  .content { margin-left: 0; }

  .page-header {
    padding: calc(52px + 24px) 24px 48px;
  }

  .era-section {
    padding: 48px 20px;
    min-height: 100svh;
    align-items: flex-end;
  }

  .era-glass-card {
    padding: 32px 28px;
    border-radius: 16px;
    max-width: 100%;
  }

  .page-title {
    font-size: clamp(36px, 10vw, 56px);
  }
}

/* ─── Detail Page ────────────────────────────────────────────────────────────── */
.detail-layout {
  max-width: 100%;
  margin: 0 auto;
  padding: 0 0 100px;
}

.detail-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 32px 48px;
  border-bottom: 1px solid var(--gray-light);
  margin: 0 auto 32px;
  max-width: 1100px;
}

.detail-content-wrap {
  width: 100%;
  color: rgba(0, 0, 0, 1);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gray-dark);
  transition: color 0.2s;
}

.back-link:hover { color: var(--black); }
.back-arrow { font-size: 16px; }

.detail-logo {
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gray-mid);
}

/* Detail — full-bleed hero + visual gallery (static site) */
.detail-hero-full {
  position: relative;
  min-height: 88vh;
  width: 100%;
  margin-bottom: 80px;
}

.detail-hero-visual {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
}

.detail-hero-scrim {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    var(--white) 0%,
    rgba(250, 250, 250, 0.55) 40%,
    rgba(0, 0, 0, 0.35) 100%
  );
  pointer-events: none;
}

.detail-hero-glass {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  padding: 48px 48px 56px;
  max-width: 1100px;
  margin: 0 auto;
}

.detail-hero-glass .detail-eyebrow {
  color: rgba(255, 255, 255, 0.85);
}

.detail-hero-glass .era-number-detail {
  color: var(--white);
}

.detail-title-hero {
  color: var(--white);
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.45);
}

.detail-description-hero {
  color: rgba(255, 255, 255, 0.92);
  max-width: 52ch;
  text-shadow: 0 1px 12px rgba(0, 0, 0, 0.35);
}

.detail-hero-glass .detail-context {
  margin-top: var(--space-4);
}

.detail-context-hero .context-card {
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.28);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  color: var(--black);
}

.detail-context-hero .context-label {
  color: rgba(10, 10, 10, 0.65);
}

.detail-context-hero .context-value {
  color: #111;
}

.detail-gallery-section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 48px 80px;
}

.detail-gallery-kicker {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gray-dark);
  margin-bottom: 12px;
}

.detail-gallery-title {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  line-height: 0.98;
  margin-bottom: 16px;
}

.detail-gallery-intro {
  max-width: 62ch;
  line-height: 1.7;
  color: var(--gray-dark);
  margin-bottom: 56px;
}

.detail-gallery {
  display: flex;
  flex-direction: column;
  gap: 96px;
}

.detail-artwork-card {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.detail-artwork-frame {
  position: relative;
  width: 100%;
  min-height: 200px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--gray-light);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.12);
  background: #e8e8e8;
  display: flex;
  align-items: center;
  justify-content: center;
}

.detail-artwork-img {
  width: 100%;
  height: auto;
  object-fit: contain;
  display: block;
  vertical-align: middle;
}

.detail-artwork-glass {
  position: relative;
  z-index: 1;
  margin: -48px auto 0;
  max-width: 720px;
  padding: 36px 40px;
  border-radius: var(--radius-md);
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(1.35);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.35);
  box-shadow:
    0 0 0 0.5px rgba(255, 255, 255, 0.08) inset,
    0 20px 50px rgba(0, 0, 0, 0.12);
}

.detail-artwork-title {
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 700;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  line-height: 1.05;
  margin-bottom: 10px;
}

.detail-artwork-meta {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gray-dark);
  margin-bottom: 20px;
}

.detail-feature-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
  padding: 0;
  list-style: none;
}

.detail-feature-tag {
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--gray-mid);
  background: rgba(255, 255, 255, 0.65);
  color: var(--black);
}

.detail-artwork-blurb {
  font-size: 15px;
  line-height: 1.75;
  color: #222;
  margin-bottom: 20px;
}

.detail-artist-note {
  font-size: 14px;
  line-height: 1.65;
  color: #333;
  padding-top: 16px;
  border-top: 1px solid var(--gray-light);
  margin-bottom: 16px;
}

.detail-artist-label {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gray-dark);
  margin-bottom: 8px;
}

.detail-art-attribution {
  font-size: 11px;
  line-height: 1.5;
  color: var(--gray-dark);
  margin-bottom: 8px;
}

.detail-source-link {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--black);
  border-bottom: 1px solid var(--gray-mid);
  padding-bottom: 2px;
}

.detail-source-link:hover {
  color: var(--gray-dark);
}

.detail-body-wide {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 48px;
}

.detail-section-full {
  grid-column: 1 / -1;
}

@media (max-width: 768px) {
  .detail-hero-glass {
    padding: 32px 24px 40px;
  }

  .detail-gallery-section,
  .detail-body-wide {
    padding-left: 24px;
    padding-right: 24px;
  }

  .detail-artwork-glass {
    margin-top: -32px;
    padding: 28px 24px;
  }
}

/* Detail Hero */
.detail-hero {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 64px;
  align-items: start;
  margin-bottom: 80px;
}

.detail-hero-image {
  aspect-ratio: 3/4;
  background-size: cover;
  background-position: center;
  border-radius: var(--radius-sm);
  overflow: hidden;
  position: relative;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.18);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.35s var(--ease-out);
}

.detail-hero-image::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,0.08), rgba(0,0,0,0.44));
}

.detail-hero-image:hover { transform: scale(1.02); }

.era-placeholder-text.large {
  font-size: clamp(40px, 6vw, 80px);
  color: rgba(255, 255, 255, 0.92);
  text-shadow: 0 1px 12px rgba(0, 0, 0, 0.5);
  z-index: 1;
}

.detail-eyebrow {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gray-dark);
  margin-bottom: 20px;
}

.era-number-detail {
  font-weight: 700;
  color: var(--black);
}

.detail-title {
  font-size: clamp(36px, 5vw, 72px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 0.95;
  text-transform: uppercase;
  margin-bottom: 28px;
}

.detail-description {
  font-size: 15px;
  line-height: 1.75;
  color: #333;
  max-width: 52ch;
}

.detail-context {
  margin-top: var(--space-3);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
}

.context-card {
  border: 1px solid var(--gray-light);
  border-radius: var(--radius-sm);
  padding: var(--space-2);
}

.context-label {
  display: block;
  margin-bottom: 6px;
  font-size: 10px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gray-dark);
  font-weight: 700;
}

.context-value {
  font-size: 13px;
  line-height: 1.6;
}

/* Detail Body */
.detail-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  margin-bottom: 80px;
  padding-top: 48px;
  border-top: 1px solid var(--gray-light);
}

.detail-section-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gray-dark);
  margin-bottom: 24px;
}

.detail-highlights-full {
  display: flex;
  flex-direction: column;
}

.detail-highlights-full li {
  font-size: 13px;
  padding: 10px 0 10px 14px;
  border-bottom: 1px solid var(--gray-light);
  color: #222;
  position: relative;
  line-height: 1.5;
}

.detail-highlights-full li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--gray-mid);
}

.detail-facts { display: flex; flex-direction: column; }

.fact-row {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--gray-light);
  font-size: 13px;
}

.fact-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gray-dark);
  padding-top: 1px;
}

.fact-value { color: #222; line-height: 1.5; }

/* Pagination */
.detail-pagination {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding-top: 48px;
  border-top: 1px solid var(--gray-light);
}

.pagination-link {
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: opacity 0.2s;
}

.pagination-link:hover { opacity: 0.6; }
.pagination-link.disabled { opacity: 0.2; pointer-events: none; }

.pag-dir {
  font-size: 10px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gray-dark);
}

.pag-name {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

/* Not Found */
.detail-not-found {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  gap: 16px;
  text-align: center;
}

.not-found-code {
  font-size: 120px;
  font-weight: 700;
  letter-spacing: -0.05em;
  color: var(--gray-light);
  line-height: 1;
}

.not-found-msg {
  font-size: 14px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray-dark);
  margin-bottom: 24px;
}

.hidden-era {
  display: none;
}

/* ─── Detail page (detail.html) — dark canvas + hero carousel ─────────────── */
body.detail-page {
  background: #000;
  color: #fff;
}

body.detail-page .detail-layout {
  color: #fff;
}

body.detail-page .detail-header {
  border-bottom-color: rgba(255, 255, 255, 0.12);
}

body.detail-page .back-link {
  color: rgba(255, 255, 255, 0.85);
}

body.detail-page .back-link:hover {
  color: #fff;
}

body.detail-page .detail-logo {
  color: rgba(255, 255, 255, 0.45);
}

body.detail-page .detail-content-wrap {
  color: #fff;
}

body.detail-page .detail-hero-scrim {
  z-index: 1;
  background: linear-gradient(
    to top,
    #000 0%,
    rgba(0, 0, 0, 0.55) 45%,
    transparent 100%
  );
}

body.detail-page .detail-hero-carousel {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  outline: none;
}

body.detail-page .detail-hero-carousel:focus-visible {
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.65);
}

body.detail-page .detail-hero-carousel-viewport {
  position: relative;
  height: 100%;
  width: 100%;
  overflow: hidden;
}

body.detail-page .detail-hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 1.4s ease;
}

@media (prefers-reduced-motion: reduce) {
  body.detail-page .detail-hero-slide {
    transition: none;
  }
}

body.detail-page .detail-hero-slide.is-active {
  opacity: 1;
  z-index: 1;
}

body.detail-page .detail-hero-slide img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  user-select: none;
}

body.detail-page .detail-hero-carousel-dots {
  pointer-events: none;
  position: absolute;
  left: 0;
  right: 0;
  bottom: 16px;
  z-index: 2;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 6px;
  padding: 0 16px;
}

body.detail-page .detail-hero-carousel-dots .detail-carousel-dot {
  pointer-events: auto;
  width: 8px;
  height: 8px;
  padding: 0;
  border: none;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  transition: background 0.2s, width 0.2s;
}

body.detail-page .detail-hero-carousel-dots .detail-carousel-dot:hover {
  background: rgba(255, 255, 255, 0.75);
}

body.detail-page .detail-hero-carousel-dots .detail-carousel-dot.is-selected {
  width: 24px;
  background: #fff;
}

body.detail-page .detail-hero-glass {
  z-index: 2;
}

body.detail-page .detail-hero-glass .detail-eyebrow {
  color: rgba(255, 255, 255, 0.85);
}

body.detail-page .detail-hero-glass .era-number-detail {
  color: #fff;
}

body.detail-page .detail-title-hero {
  color: #fff;
}

body.detail-page .detail-description-hero {
  color: rgba(255, 255, 255, 0.92);
}

body.detail-page .detail-context-hero .context-card {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.22);
  color: #fff;
}

body.detail-page .detail-context-hero .context-label {
  color: rgba(255, 255, 255, 0.65);
}

body.detail-page .detail-context-hero .context-value {
  color: #fff;
}

body.detail-page .detail-gallery-kicker {
  color: rgba(255, 255, 255, 0.55);
}

body.detail-page .detail-gallery-title {
  color: #fff;
}

body.detail-page .detail-gallery-intro {
  color: rgba(255, 255, 255, 0.75);
}

body.detail-page .detail-artwork-frame {
  border-color: rgba(255, 255, 255, 0.18);
  background: #111;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
}

body.detail-page .detail-artwork-glass {
  border-color: rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.08);
  box-shadow:
    0 0 0 0.5px rgba(255, 255, 255, 0.06) inset,
    0 20px 50px rgba(0, 0, 0, 0.4);
}

body.detail-page .detail-artwork-title {
  color: #fff;
}

body.detail-page .detail-artwork-meta {
  color: rgba(255, 255, 255, 0.65);
}

body.detail-page .detail-feature-tag {
  border-color: rgba(255, 255, 255, 0.28);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

body.detail-page .detail-artwork-blurb,
body.detail-page .detail-artist-note {
  color: rgba(255, 255, 255, 0.9);
}

body.detail-page .detail-artist-note {
  border-top-color: rgba(255, 255, 255, 0.12);
}

body.detail-page .detail-artist-label {
  color: rgba(255, 255, 255, 0.55);
}

body.detail-page .detail-art-attribution {
  color: rgba(255, 255, 255, 0.5);
}

body.detail-page .detail-source-link {
  color: #fff;
  border-bottom-color: rgba(255, 255, 255, 0.35);
}

body.detail-page .detail-source-link:hover {
  color: rgba(255, 255, 255, 0.8);
}

body.detail-page .detail-body {
  border-top-color: rgba(255, 255, 255, 0.12);
}

body.detail-page .detail-section-title {
  color: rgba(255, 255, 255, 0.65);
}

body.detail-page .fact-row {
  border-bottom-color: rgba(255, 255, 255, 0.12);
}

body.detail-page .fact-label {
  color: rgba(255, 255, 255, 0.55);
}

body.detail-page .fact-value {
  color: rgba(255, 255, 255, 0.92);
}

body.detail-page .detail-pagination {
  border-top-color: rgba(255, 255, 255, 0.12);
}

body.detail-page .pag-dir {
  color: rgba(255, 255, 255, 0.55);
}

body.detail-page .pag-name {
  color: #fff;
}

body.detail-page .pagination-link:hover {
  opacity: 0.85;
}

body.detail-page .detail-not-found .not-found-code {
  color: rgba(255, 255, 255, 0.15);
}

body.detail-page .detail-not-found .not-found-msg {
  color: rgba(255, 255, 255, 0.55);
}

/* Compare Page */
body.compare-page {
  background: var(--black);
  color: var(--white);
}

.compare-layout {
  margin-left: var(--sidebar-w);
  min-height: 100vh;
  padding: var(--space-6);
}

.compare-page-head {
  margin-bottom: var(--space-5);
}

.compare-page-kicker {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: rgba(255, 255, 255, 0.65);
}

.compare-page-title {
  margin-top: var(--space-2);
  font-size: clamp(36px, 5vw, 70px);
  line-height: 0.94;
  letter-spacing: -0.03em;
  text-transform: uppercase;
}

.compare-page-subtitle {
  margin-top: var(--space-3);
  max-width: 66ch;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.78);
}

.compare-page-controls {
  display: grid;
  grid-template-columns: repeat(2, minmax(260px, 340px));
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}

.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

.compare-movement-card {
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
}

.compare-movement-image {
  height: 260px;
  background-size: cover;
  background-position: center;
}

.compare-movement-body {
  padding: var(--space-3);
}

.compare-movement-title {
  font-size: 30px;
  line-height: 1;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.compare-movement-period {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: rgba(255, 255, 255, 0.62);
}

.compare-movement-text {
  margin-top: var(--space-2);
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.86);
}

.compare-movement-meta {
  margin-top: var(--space-2);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.82);
  line-height: 1.6;
}

.compare-movement-link {
  margin-top: var(--space-3);
}

@media (max-width: 768px) {
  .compare-layout {
    margin-left: 0;
    padding: 88px 24px 48px;
  }

  .compare-page-controls {
    grid-template-columns: 1fr;
  }

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

@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;
  }

  .era-bg {
    transform: scale(1.02) !important;
  }
}

@media (max-width: 768px) {
  .detail-layout { padding: 0 24px 80px; }

  .detail-hero {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .detail-body {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .detail-header { flex-direction: column; align-items: flex-start; gap: 12px; }
}

/* ─── Left Artwork Timeline (detail page) ────────────────────────────────── */
.artwork-timeline {
  position: fixed;
  left: 24px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 50;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.timeline-line {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  top: 0;
  bottom: 0;
  width: 1px;
  background: rgba(255, 255, 255, 0.18);
  pointer-events: none;
}

.timeline-dots {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  z-index: 1;
}

.tl-dot {
  position: relative;
  width: 10px;
  height: 10px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.28);
  cursor: pointer;
  transition: background 0.35s ease, transform 0.35s ease;
  flex-shrink: 0;
}

.tl-dot:hover {
  background: rgba(255, 255, 255, 0.65);
}

.tl-dot.is-active {
  background: #fff;
  transform: scale(1.35);
}

.tl-tooltip {
  position: absolute;
  left: 20px;
  top: 50%;
  transform: translateY(-50%);
  opacity: 0;
  filter: blur(5px);
  pointer-events: none;
  white-space: nowrap;
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.9);
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 4px 9px;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  transition: opacity 0.25s ease, filter 0.25s ease;
}

.tl-dot:hover .tl-tooltip {
  opacity: 1;
  filter: blur(0);
}

@media (max-width: 768px) {
  .artwork-timeline {
    display: none;
  }
}

/* ─── Back to Top ─────────────────────────────────────────────────────────── */
.back-to-top-btn {
  position: fixed;
  right: 32px;
  bottom: 32px;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  color: rgba(255, 255, 255, 0.8);
  font-size: 10px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity 0.35s ease, transform 0.35s ease, background 0.2s ease;
}

.back-to-top-btn.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.back-to-top-btn:hover {
  background: rgba(255, 255, 255, 0.16);
  transform: translateY(-3px);
}

.back-to-top-btn.is-visible:hover {
  transform: translateY(-3px);
}

.btt-arrow {
  font-size: 13px;
  line-height: 1;
}