/*
  Editorial Game Library Design System
  Style: Premium Editorial Retro Game Catalog
  A refined editorial visual language combining cinematic artwork,
  classical serif typography, neutral charcoal and archival ivory surfaces,
  and restrained warm gold accents.
*/

:root {
  /* Cinematic Dark Surfaces */
  --bg-base: #0d0e12;
  --bg-surface: #13151b;
  --bg-elevated: #1a1d24;
  --bg-card: #20242e;
  --bg-card-hover: #262b37;
  --bg-card-subtle: #161820;

  /* Archival Light Surfaces (for contrast sections & cards) */
  --archival-ivory: #faf7f0;
  --archival-cream: #f4efdf;
  --archival-paper: #eae3d0;
  --archival-ink: #18191f;
  --archival-muted: #5e616c;
  --archival-border: #dcd4c0;

  /* Typography Colors */
  --text-primary: #f5f3ee;
  --text-secondary: #9da1ad;
  --text-muted: #646876;
  --text-inverted: #121316;

  /* Restrained Warm Gold & Ochre Accents */
  --gold-pure: #c99d3e;
  --gold-light: #e0b754;
  --gold-pale: #f2d88c;
  --gold-dark: #8a6820;
  --gold-subtle: rgba(201, 157, 62, 0.12);
  --gold-border: rgba(201, 157, 62, 0.32);
  --gold-glow: rgba(201, 157, 62, 0.22);

  /* Quiet Borders */
  --border-quiet: rgba(255, 255, 255, 0.07);
  --border-medium: rgba(255, 255, 255, 0.13);
  --border-card: rgba(255, 255, 255, 0.09);

  /* Typography Scales */
  --font-serif: 'Playfair Display', 'Cormorant Garamond', Georgia, serif;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Layout Geometry */
  --shell-max: 1200px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-pill: 9999px;

  /* Shadows */
  --shadow-subtle: 0 4px 16px rgba(0, 0, 0, 0.35);
  --shadow-medium: 0 12px 32px rgba(0, 0, 0, 0.5);
  --shadow-modal: 0 24px 64px rgba(0, 0, 0, 0.75);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}

button {
  font-family: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

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

/* Layout Container */
.shell {
  width: min(var(--shell-max), calc(100% - 48px));
  margin-inline: auto;
}

/* Archival Eyebrow Badge */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold-pure);
  margin-bottom: 14px;
  font-weight: 600;
}

.eyebrow::before {
  content: '';
  display: inline-block;
  width: 14px;
  height: 1px;
  background: var(--gold-pure);
}

/* Typography Classes */
.serif-display {
  font-family: var(--font-serif);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

/* Top Announcement Strip */
.archival-strip {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-quiet);
  padding: 8px 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-secondary);
  letter-spacing: 0.06em;
}

.archival-strip .shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.strip-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.strip-tag {
  color: var(--gold-pure);
  font-weight: 600;
  border: 1px solid var(--gold-border);
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  font-size: 0.65rem;
}

.strip-right {
  display: flex;
  align-items: center;
  gap: 20px;
}

.strip-right a {
  color: var(--text-secondary);
  font-size: 0.72rem;
}

.strip-right a:hover {
  color: var(--gold-light);
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(13, 14, 18, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-quiet);
  transition: background 0.3s ease, border-color 0.3s ease;
}

.nav {
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-emblem {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: var(--bg-elevated);
  border: 1px solid var(--border-medium);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

.brand-emblem img {
  width: 100%;
  height: 100%;
}

.brand-info {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.brand-tag {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  text-transform: uppercase;
}

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

.nav-links a {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

.nav-links a:hover {
  color: var(--gold-light);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.menu-toggle {
  display: none;
  padding: 8px;
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-quiet);
}

/* Primary Button Styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: all 0.22s ease;
}

.btn-primary {
  background: var(--gold-pure);
  color: var(--bg-base);
  border: 1px solid var(--gold-light);
  box-shadow: 0 4px 14px var(--gold-glow);
}

.btn-primary:hover {
  background: var(--gold-light);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(201, 157, 62, 0.35);
}

.btn-secondary {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border-medium);
}

.btn-secondary:hover {
  background: var(--bg-card);
  border-color: var(--gold-border);
  transform: translateY(-2px);
}

.btn-ghost {
  color: var(--text-secondary);
  border: 1px solid transparent;
}

.btn-ghost:hover {
  color: var(--text-primary);
  border-color: var(--border-quiet);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.8rem;
}

/* Hero Section */
.hero {
  padding: 84px 0 100px;
  position: relative;
  overflow: hidden;
}

.hero-background-texture {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 100%;
  background: radial-gradient(circle at 75% 30%, rgba(201, 157, 62, 0.07) 0%, transparent 60%),
              radial-gradient(circle at 20% 70%, rgba(32, 36, 46, 0.6) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.95fr;
  gap: 56px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content {
  max-width: 620px;
}

.hero-headline {
  font-family: var(--font-serif);
  font-size: 3.6rem;
  line-height: 1.08;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 24px;
}

.hero-headline span {
  font-style: italic;
  color: var(--gold-light);
  font-weight: 400;
}

.hero-narrative {
  font-size: 1.08rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 44px;
  flex-wrap: wrap;
}

.hero-metrics {
  display: flex;
  align-items: center;
  gap: 32px;
  padding-top: 28px;
  border-top: 1px solid var(--border-quiet);
}

.metric-item {
  display: flex;
  flex-direction: column;
}

.metric-value {
  font-family: var(--font-serif);
  font-size: 1.65rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.1;
}

.metric-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Hero Showcase Card / Stage */
.hero-stage {
  position: relative;
}

.stage-frame {
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-medium);
  position: relative;
}

.stage-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-quiet);
  margin-bottom: 18px;
}

.stage-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-secondary);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #34d399;
  box-shadow: 0 0 8px #34d399;
}

.stage-chip {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--gold-pure);
  background: var(--gold-subtle);
  border: 1px solid var(--gold-border);
  padding: 3px 9px;
  border-radius: var(--radius-pill);
}

/* Featured Cartridge Artwork Showcase */
.curated-card {
  background: linear-gradient(180deg, #181b23 0%, #111317 100%);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-quiet);
  overflow: hidden;
  position: relative;
}

.curated-art {
  height: 240px;
  background: radial-gradient(circle at 50% 30%, #2f3444 0%, #151820 100%);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

/* Vector Archival Illustration in Hero */
.art-composition {
  width: 100%;
  height: 100%;
  position: absolute;
  inset: 0;
}

/* Scanline Effect Overlay */
.scanline-layer {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    rgba(0, 0, 0, 0.25) 0px,
    rgba(0, 0, 0, 0.25) 1px,
    transparent 1px,
    transparent 2px
  );
  pointer-events: none;
  opacity: 0.45;
  mix-blend-mode: overlay;
  transition: opacity 0.3s ease;
}

.scanline-layer.active {
  opacity: 0.75;
}

.curated-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(13, 14, 18, 0.75);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-quiet);
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.curated-badge i {
  color: var(--gold-pure);
}

.curated-info {
  padding: 20px 22px;
}

.curated-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.curated-system {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--gold-light);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.curated-year {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

.curated-title {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  color: var(--text-primary);
  margin-bottom: 12px;
  font-weight: 600;
}

.curated-summary {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 18px;
}

.curated-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--border-quiet);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.curated-slot {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--gold-pure);
}

/* Floating Decorative Archival Note */
.floating-archival-note {
  position: absolute;
  bottom: -24px;
  right: -16px;
  background: var(--archival-ivory);
  color: var(--archival-ink);
  padding: 14px 18px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-medium);
  border: 1px solid var(--archival-border);
  width: 220px;
  z-index: 2;
  transition: transform 0.3s ease;
}

.floating-archival-note .note-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--archival-muted);
  display: block;
  margin-bottom: 4px;
}

.floating-archival-note strong {
  display: block;
  font-family: var(--font-serif);
  font-size: 0.95rem;
  line-height: 1.25;
  margin-bottom: 4px;
}

.floating-archival-note p {
  font-size: 0.72rem;
  color: var(--archival-muted);
  line-height: 1.35;
}

/* Section Common Styles */
.section {
  padding: 96px 0;
  position: relative;
}

.section-alt {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-quiet);
  border-bottom: 1px solid var(--border-quiet);
}

.section-heading {
  margin-bottom: 56px;
}

.section-heading.centered {
  text-align: center;
  max-width: 680px;
  margin-inline: auto;
}

.section-heading.centered .eyebrow {
  justify-content: center;
}

.section-heading.centered .eyebrow::after {
  content: '';
  display: inline-block;
  width: 14px;
  height: 1px;
  background: var(--gold-pure);
}

.section-title {
  font-family: var(--font-serif);
  font-size: 2.75rem;
  line-height: 1.15;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.section-title span {
  font-style: italic;
  color: var(--gold-light);
  font-weight: 400;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* Systems Hall & Filtering */
.systems-filter-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 44px;
  flex-wrap: wrap;
}

.filter-tab {
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  background: var(--bg-surface);
  border: 1px solid var(--border-quiet);
  transition: all 0.2s ease;
}

.filter-tab:hover {
  color: var(--text-primary);
  border-color: var(--border-medium);
}

.filter-tab.active {
  color: var(--gold-pure);
  background: var(--bg-elevated);
  border-color: var(--gold-border);
  box-shadow: 0 2px 10px var(--gold-subtle);
}

.systems-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.system-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
  position: relative;
  overflow: hidden;
}

.system-card:hover {
  transform: translateY(-4px);
  border-color: var(--gold-border);
  box-shadow: var(--shadow-medium);
}

.system-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.system-icon-wrap {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--bg-surface);
  border: 1px solid var(--border-quiet);
  display: grid;
  place-items: center;
  color: var(--gold-pure);
}

.system-bit-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  border: 1px solid var(--border-quiet);
  padding: 3px 8px;
  border-radius: var(--radius-pill);
}

.system-name {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.system-core-meta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--gold-pure);
  margin-bottom: 12px;
}

.system-desc {
  font-size: 0.86rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 20px;
  flex-grow: 1;
}

.system-spec-list {
  border-top: 1px solid var(--border-quiet);
  padding-top: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* Pillars Section: Contrast Archival Panels */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.pillar-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.22s ease, border-color 0.22s ease;
}

.pillar-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-medium);
}

.pillar-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--gold-pure);
  letter-spacing: 0.1em;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.pillar-num::after {
  content: '';
  height: 1px;
  flex: 1;
  background: var(--border-quiet);
}

.pillar-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  border: 1px solid var(--border-quiet);
  display: grid;
  place-items: center;
  color: var(--gold-pure);
  margin-bottom: 20px;
}

.pillar-title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  color: var(--text-primary);
  margin-bottom: 12px;
  font-weight: 600;
  line-height: 1.25;
}

.pillar-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Interactive Simulator Chapter */
.simulator-wrapper {
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-medium);
}

.sim-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 28px;
  border-bottom: 1px solid var(--border-quiet);
  background: #101217;
  flex-wrap: wrap;
  gap: 16px;
}

.sim-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.sim-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.sim-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-secondary);
  background: var(--bg-elevated);
  border: 1px solid var(--border-quiet);
  transition: all 0.2s ease;
}

.sim-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-medium);
}

.sim-btn.active {
  color: var(--gold-pure);
  background: var(--gold-subtle);
  border-color: var(--gold-border);
}

.sim-viewport-layout {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  min-height: 480px;
}

.sim-screen-container {
  background: #08090b;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px;
  border-right: 1px solid var(--border-quiet);
}

.sim-crt-bezel {
  width: 100%;
  max-width: 540px;
  aspect-ratio: 4 / 3;
  background: #000;
  border: 12px solid #1c1f26;
  border-radius: 20px;
  box-shadow: inset 0 0 30px rgba(0, 0, 0, 0.9), 0 8px 32px rgba(0, 0, 0, 0.7);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sim-crt-canvas {
  width: 100%;
  height: 100%;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sim-hud-overlay {
  position: absolute;
  top: 14px;
  left: 14px;
  right: 14px;
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: #5cdb95;
  text-shadow: 0 0 4px #5cdb95;
  z-index: 10;
  pointer-events: none;
}

.sim-game-art {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.sim-hud-status-badge {
  position: absolute;
  bottom: 14px;
  right: 14px;
  background: rgba(0, 0, 0, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--gold-pure);
  z-index: 10;
}

/* Simulator Sidebar Controls */
.sim-sidebar {
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.sim-sidebar-heading {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.sim-sidebar-desc {
  font-size: 0.86rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 24px;
}

.sim-feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 28px;
}

.sim-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.86rem;
}

.sim-feature-item i {
  color: var(--gold-pure);
  flex-shrink: 0;
  margin-top: 2px;
}

.sim-feature-item strong {
  display: block;
  color: var(--text-primary);
  font-size: 0.88rem;
  margin-bottom: 2px;
}

.sim-feature-item span {
  color: var(--text-secondary);
  font-size: 0.78rem;
}

.sim-slots-group {
  border-top: 1px solid var(--border-quiet);
  padding-top: 20px;
}

.sim-slots-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.sim-slots-buttons {
  display: flex;
  gap: 8px;
}

.slot-btn {
  flex: 1;
  padding: 8px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-quiet);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  transition: all 0.2s ease;
  text-align: center;
}

.slot-btn:hover {
  border-color: var(--border-medium);
  color: var(--text-primary);
}

.slot-btn.active {
  background: var(--gold-subtle);
  border-color: var(--gold-border);
  color: var(--gold-pure);
}

/* Archival Ivory Exhibition Card (Light Surface Contrast) */
.exhibition-section {
  padding: 96px 0;
}

.exhibition-card {
  background: var(--archival-ivory);
  color: var(--archival-ink);
  border-radius: var(--radius-lg);
  padding: 64px;
  box-shadow: var(--shadow-medium);
  border: 1px solid var(--archival-border);
}

.exhibition-card .eyebrow {
  color: var(--gold-dark);
}

.exhibition-card .eyebrow::before {
  background: var(--gold-dark);
}

.exhibition-card .section-title {
  color: var(--archival-ink);
}

.exhibition-card .section-title span {
  color: var(--gold-dark);
}

.exhibition-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 36px;
  margin-top: 48px;
  padding-top: 36px;
  border-top: 1px solid var(--archival-border);
}

.exhibition-item {
  display: flex;
  flex-direction: column;
}

.exhibition-item h3 {
  font-family: var(--font-serif);
  font-size: 1.28rem;
  margin-bottom: 8px;
  color: var(--archival-ink);
}

.exhibition-item p {
  font-size: 0.88rem;
  color: var(--archival-muted);
  line-height: 1.55;
}

/* Specifications Matrix */
.specs-table-wrapper {
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-top: 40px;
}

.specs-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.specs-table th {
  background: #0f1015;
  padding: 16px 24px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold-pure);
  border-bottom: 1px solid var(--border-quiet);
}

.specs-table td {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-quiet);
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.specs-table tr:last-child td {
  border-bottom: none;
}

.specs-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

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

.badge-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  background: var(--bg-elevated);
  border: 1px solid var(--border-quiet);
  color: var(--text-secondary);
}

/* FAQ Accordion */
.faq-container {
  max-width: 800px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  transition: border-color 0.2s ease, background 0.2s ease;
  overflow: hidden;
}

.faq-item:hover {
  border-color: var(--border-medium);
}

.faq-item[open] {
  border-color: var(--gold-border);
  background: var(--bg-elevated);
}

.faq-question {
  padding: 20px 24px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
  font-family: var(--font-serif);
  font-size: 1.18rem;
  font-weight: 600;
  color: var(--text-primary);
  user-select: none;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-indicator {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--gold-pure);
  transition: transform 0.2s ease;
}

.faq-item[open] .faq-indicator {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 24px 22px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* Download CTA Section */
.cta-section {
  padding: 100px 0;
  position: relative;
}

.cta-box {
  background: linear-gradient(180deg, #181b23 0%, #101217 100%);
  border: 1px solid var(--gold-border);
  border-radius: var(--radius-lg);
  padding: 64px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-medium);
}

.cta-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 380px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold-pure), transparent);
}

.cta-headline {
  font-family: var(--font-serif);
  font-size: 3rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 18px;
  line-height: 1.15;
}

.cta-headline span {
  font-style: italic;
  color: var(--gold-light);
  font-weight: 400;
}

.cta-subtext {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 580px;
  margin: 0 auto 36px;
  line-height: 1.65;
}

.cta-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.cta-note {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

/* Footer */
.site-footer {
  background: #090a0d;
  border-top: 1px solid var(--border-quiet);
  padding: 64px 0 36px;
  color: var(--text-muted);
  font-size: 0.82rem;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand p {
  margin-top: 14px;
  line-height: 1.6;
  color: var(--text-secondary);
  max-width: 320px;
  font-size: 0.85rem;
}

.footer-column h4 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold-pure);
  margin-bottom: 18px;
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links-list a {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

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

.footer-disclaimer {
  padding-top: 28px;
  border-top: 1px solid var(--border-quiet);
  margin-bottom: 28px;
  font-size: 0.72rem;
  line-height: 1.6;
  color: #555964;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

/* Modal Dialog */
.download-modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.24s ease;
}

.download-modal.is-open {
  opacity: 1;
  pointer-events: auto;
}

.download-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(8, 9, 12, 0.78);
  backdrop-filter: blur(8px);
}

.download-dialog {
  position: relative;
  width: min(500px, calc(100% - 32px));
  background: var(--bg-surface);
  border: 1px solid var(--gold-border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow-modal);
  transform: translateY(16px);
  transition: transform 0.24s ease;
  z-index: 1;
}

.download-modal.is-open .download-dialog {
  transform: translateY(0);
}

.download-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--bg-elevated);
  border: 1px solid var(--border-quiet);
  color: var(--text-secondary);
  display: grid;
  place-items: center;
  font-size: 1.2rem;
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.download-close:hover {
  color: var(--text-primary);
  border-color: var(--border-medium);
}

.modal-header {
  text-align: center;
  margin-bottom: 24px;
}

.modal-header .brand-emblem {
  margin: 0 auto 16px;
  width: 54px;
  height: 54px;
}

.modal-title {
  font-family: var(--font-serif);
  font-size: 1.85rem;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.modal-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.modal-options {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.download-option-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border-quiet);
  transition: all 0.2s ease;
}

.download-option-card:hover {
  background: var(--bg-card);
  border-color: var(--gold-border);
  transform: translateY(-2px);
}

.option-icon {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: var(--bg-surface);
  display: grid;
  place-items: center;
  color: var(--gold-pure);
  flex-shrink: 0;
}

.option-text {
  flex-grow: 1;
}

.option-title {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-primary);
  display: block;
}

.option-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.modal-footer {
  text-align: center;
  border-top: 1px solid var(--border-quiet);
  padding-top: 16px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .hero-content {
    max-width: 100%;
  }
  .systems-grid, .pillars-grid, .exhibition-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .sim-viewport-layout {
    grid-template-columns: 1fr;
  }
  .sim-screen-container {
    border-right: none;
    border-bottom: 1px solid var(--border-quiet);
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
}

@media (max-width: 768px) {
  .shell {
    width: min(100% - 32px, 1200px);
  }
  .nav-links, .nav-actions .btn {
    display: none;
  }
  .menu-toggle {
    display: block;
  }
  .nav-links.open {
    display: flex;
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    padding: 24px;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-medium);
    flex-direction: column;
    gap: 18px;
    box-shadow: var(--shadow-medium);
  }
  .hero-headline {
    font-size: 2.6rem;
  }
  .section-title {
    font-size: 2.1rem;
  }
  .cta-headline {
    font-size: 2.2rem;
  }
  .systems-grid, .pillars-grid, .exhibition-grid {
    grid-template-columns: 1fr;
  }
  .hero-metrics {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }
  .floating-archival-note {
    position: static;
    width: 100%;
    margin-top: 18px;
  }
  .exhibition-card {
    padding: 36px 24px;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
  .archival-strip .strip-right {
    display: none;
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}