/* ============================================================
   AUGMENTIVERSE.ORG — Reference Website
   Design System: Dark editorial / academic authority
   Fonts: Cormorant Garamond (display) + DM Sans (body) + JetBrains Mono (code/labels)
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,600;1,300;1,400&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;1,9..40,300&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── TOKENS ── */
:root {
  /* Colors */
  --c-bg:         #071a2b;
  --c-bg-2:       #0c2238;
  --c-bg-3:       #113050;
  --c-bg-4:       #183d65;
  --c-surface:    #1b4673;
  --c-border:     rgba(196,218,246,0.09);
  --c-border-md:  rgba(196,218,246,0.16);

  --c-ink:        #f0ede6;
  --c-ink-soft:   #b8b4ac;
  --c-ink-muted:  #7a7870;
  --c-ink-faint:  #3e3d3a;

  --c-gold:       #c9a84c;
  --c-gold-light: #e8cc7a;
  --c-gold-dim:   rgba(201,168,76,0.15);
  --c-gold-glow:  rgba(201,168,76,0.06);

  --c-blue:       #7ab6ff;
  --c-blue-dim:   rgba(122,182,255,0.14);
  --c-teal:       #3aaa8a;
  --c-coral:      #c96b4a;

  /* Typography */
  --f-display: 'Cormorant Garamond', Georgia, serif;
  --f-body:    'DM Sans', system-ui, sans-serif;
  --f-mono:    'JetBrains Mono', monospace;

  /* Spacing */
  --sp-xs: 0.5rem;
  --sp-sm: 1rem;
  --sp-md: 1.5rem;
  --sp-lg: 2.5rem;
  --sp-xl: 4rem;
  --sp-2xl: 6rem;

  /* Layout */
  --max-w: 1280px;
  --max-prose: 720px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;

  /* Transitions */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --dur: 220ms;
}

/* ── RESET ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  background:
    radial-gradient(circle at top, rgba(122,182,255,0.16), transparent 30%),
    linear-gradient(180deg, #071a2b 0%, #0b2034 38%, #102a45 100%);
  color: var(--c-ink);
  font-family: var(--f-body);
  font-size: 1rem;
  line-height: 1.7;
  font-weight: 300;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
main { position: relative; z-index: 1; }
body.nav-open { overflow: hidden; }
section[id], header[id] { scroll-margin-top: 96px; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ── SCROLLBAR ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--c-bg-2); }
::-webkit-scrollbar-thumb { background: var(--c-border-md); border-radius: 3px; }

/* ── SELECTION ── */
::selection { background: var(--c-gold-dim); color: var(--c-gold-light); }

/* ── ACCESSIBILITY ── */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1200;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: var(--c-gold);
  color: #14161b;
  font-family: var(--f-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transform: translateY(-140%);
  transition: transform var(--dur) var(--ease);
}
.skip-link:focus-visible { transform: translateY(0); }
:focus-visible { outline: 2px solid var(--c-gold); outline-offset: 3px; border-radius: var(--radius-sm); }

/* ── TYPOGRAPHY SCALE ── */
.t-display { font-family: var(--f-display); font-size: clamp(3rem, 7vw, 6rem); font-weight: 300; line-height: 1.05; letter-spacing: -0.02em; }
.t-h1      { font-family: var(--f-display); font-size: clamp(2.2rem, 4vw, 3.5rem); font-weight: 400; line-height: 1.1; letter-spacing: -0.015em; }
.t-h2      { font-family: var(--f-display); font-size: clamp(1.6rem, 2.5vw, 2.4rem); font-weight: 400; line-height: 1.15; letter-spacing: -0.01em; }
.t-h3      { font-family: var(--f-display); font-size: 1.4rem; font-weight: 400; line-height: 1.25; }
.t-h4      { font-family: var(--f-body); font-size: 1rem; font-weight: 500; letter-spacing: 0.01em; }
.t-body    { font-size: 1rem; line-height: 1.75; font-weight: 300; }
.t-small   { font-size: 0.875rem; line-height: 1.6; }
.t-label   { font-family: var(--f-mono); font-size: 0.7rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--c-ink-muted); }
.t-gold    { color: var(--c-gold); }
.t-italic  { font-style: italic; }
.t-muted   { color: var(--c-ink-soft); }

/* ── LAYOUT ── */
.container { width: 100%; max-width: var(--max-w); margin: 0 auto; padding: 0 var(--sp-lg); }
.container-sm { width: 100%; max-width: 900px; margin: 0 auto; padding: 0 var(--sp-lg); }
.prose { max-width: var(--max-prose); }
.section { padding: var(--sp-2xl) 0; }
.section-sm { padding: var(--sp-xl) 0; }

/* ── GRID ── */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-lg); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-md); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-md); }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--sp-md); }

/* ── DIVIDERS ── */
.divider { height: 1px; background: var(--c-border); margin: var(--sp-xl) 0; }
.divider-gold { height: 1px; background: linear-gradient(to right, var(--c-gold), transparent); width: 80px; margin: var(--sp-md) 0; }

/* ── NOISE TEXTURE OVERLAY ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 256px;
}

/* ── NAV ── */
#nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(7, 26, 43, 0.84);
  backdrop-filter: blur(20px) saturate(1.2);
  border-bottom: 1px solid var(--c-border);
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
#nav.scrolled {
  background: rgba(7, 26, 43, 0.95);
  box-shadow: 0 1px 40px rgba(2, 10, 23, 0.45);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.nav-logo-mark {
  width: 32px; height: 32px;
  border: 1px solid var(--c-gold);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--f-display);
  font-size: 14px;
  color: var(--c-gold);
  font-weight: 600;
  flex-shrink: 0;
  transition: background var(--dur) var(--ease);
}
.nav-logo:hover .nav-logo-mark { background: var(--c-gold-dim); }
.nav-logo-text {
  font-family: var(--f-display);
  font-size: 1.15rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--c-ink);
  padding-right: 2rem
}
.nav-logo-text em { color: #fd9f0c; font-style: normal; }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--sp-lg);
}
.nav-links a {
  font-family: var(--f-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-ink-soft);
  transition: color var(--dur) var(--ease);
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0; right: 0;
  height: 1px;
  background: var(--c-gold);
  transform: scaleX(0);
  transition: transform var(--dur) var(--ease);
}
.nav-links a:hover { color: var(--c-ink); }
.nav-links a:hover::after { transform: scaleX(1); }
.nav-links a.active { color: var(--c-gold); }
.nav-links .lang-switch {
  padding: 6px 10px;
  border: 1px solid var(--c-border-md);
  border-radius: 999px;
  color: var(--c-ink);
}
.nav-links .lang-switch::after { display: none; }
.nav-links .lang-switch:hover {
  color: var(--c-blue);
  border-color: rgba(122,182,255,0.48);
  background: var(--c-blue-dim);
}

.nav-cta {
  font-family: var(--f-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-gold) !important;
  border: 1px solid rgba(201,168,76,0.4);
  padding: 6px 16px;
  border-radius: var(--radius-sm);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease) !important;
}
.nav-cta:hover { background: var(--c-gold-dim) !important; border-color: var(--c-gold) !important; }
.nav-cta::after { display: none !important; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 22px; height: 1.5px;
  background: var(--c-ink-soft);
  transition: all var(--dur) var(--ease);
}
.nav-mobile {
  display: none;
  flex-direction: column;
  padding: var(--sp-sm) var(--sp-lg);
  border-top: 1px solid var(--c-border);
  background: rgba(8, 28, 48, 0.98);
}
.nav-mobile[hidden] { display: none !important; }
.nav-mobile.is-open { display: flex; }
.nav-mobile a {
  font-family: var(--f-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-ink-soft);
  padding: 12px 0;
  border-bottom: 1px solid var(--c-border);
  transition: color var(--dur) var(--ease);
}
.nav-mobile a:hover { color: var(--c-gold); }

.page-rail {
  position: fixed;
  top: 110px;
  right: 24px;
  z-index: 850;
  width: 180px;
}
.page-rail-inner {
  padding: 18px 16px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  background: rgba(12, 34, 56, 0.78);
  backdrop-filter: blur(18px);
}
.page-rail-title {
  margin-bottom: 14px;
  font-family: var(--f-mono);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-ink-muted);
}
.side-nav-link {
  display: block;
  padding: 7px 0 7px 12px;
  border-left: 1px solid var(--c-border);
  font-family: var(--f-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-ink-muted);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.side-nav-link:hover,
.side-nav-link.active {
  color: var(--c-gold);
  border-left-color: var(--c-gold);
  transform: translateX(2px);
}

/* ── HERO ── */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding-top: 64px;
  position: relative;
  overflow: hidden;
}
.hero-canvas {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-canvas svg {
  width: 100%;
  height: 100%;
  opacity: 0.12;
}
.hero-glow {
  position: absolute;
  top: 20%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(201,168,76,0.07) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}
.hero-content {
  position: relative;
  z-index: 1;
  padding: var(--sp-2xl) 0;
}
.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
  margin-bottom: var(--sp-md);
  animation: fadeUp 0.8s var(--ease) both;
}
.hero-eyebrow-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--c-gold);
  animation: pulse 2s ease infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(201,168,76,0.4); }
  50% { opacity: 0.8; box-shadow: 0 0 0 6px rgba(201,168,76,0); }
}
.hero-title {
  font-family: var(--f-display);
  font-size: clamp(3.5rem, 9vw, 8rem);
  font-weight: 300;
  line-height: 0.95;
  letter-spacing: -0.03em;
  margin-bottom: var(--sp-lg);
  animation: fadeUp 0.8s 0.1s var(--ease) both;
}
.hero-title .accent { color: #fd9f0c; font-style: italic; }
.hero-title .line-2 {
  display: block;
  padding-left: clamp(2rem, 8vw, 8rem);
  color: var(--c-ink-soft);
}
.hero-sub {
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  color: var(--c-ink-soft);
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: var(--sp-lg);
  animation: fadeUp 0.8s 0.2s var(--ease) both;
}
.hero-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-md);
  flex-wrap: wrap;
  animation: fadeUp 0.8s 0.3s var(--ease) both;
}
.hero-meta {
  display: flex;
  align-items: stretch;
  gap: 0;
  margin-top: var(--sp-2xl);
  border-top: 1px solid var(--c-border);
  animation: fadeUp 0.8s 0.4s var(--ease) both;
}
.hero-meta-item {
  flex: 1;
  padding: var(--sp-md) var(--sp-lg);
  border-right: 1px solid var(--c-border);
}
.hero-meta-item:last-child { border-right: none; }
.hero-meta-num {
  font-family: var(--f-display);
  font-size: 2rem;
  font-weight: 300;
  color: var(--c-gold);
  line-height: 1;
  margin-bottom: 4px;
}
.hero-meta-label {
  font-family: var(--f-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-ink-muted);
}

/* ── BUTTONS ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--f-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  transition: all var(--dur) var(--ease);
  white-space: nowrap;
  cursor: pointer;
}
.btn-primary {
  background: var(--c-gold);
  color: var(--c-bg);
  border: 1px solid var(--c-gold);
  font-weight: 500;
}
.btn-primary:hover {
  background: var(--c-gold-light);
  border-color: var(--c-gold-light);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(201,168,76,0.25);
}
.btn-secondary {
  background: transparent;
  color: var(--c-ink-soft);
  border: 1px solid var(--c-border-md);
}
.btn-secondary:hover {
  color: var(--c-ink);
  border-color: rgba(255,255,255,0.3);
  background: rgba(255,255,255,0.04);
}
.btn-ghost {
  background: transparent;
  color: var(--c-gold);
  border: 1px solid rgba(201,168,76,0.3);
}
.btn-ghost:hover {
  background: var(--c-gold-dim);
  border-color: var(--c-gold);
}
.btn-sm { padding: 8px 16px; font-size: 0.65rem; }
.btn-arrow::after { content: '→'; font-family: var(--f-body); font-size: 0.9em; }

/* ── SECTION HEADERS ── */
.section-header {
  display: flex;
  align-items: center;
  gap: var(--sp-md);
  margin-bottom: var(--sp-xl);
}
.section-header-line {
  flex: 1;
  height: 1px;
  background: var(--c-border);
}
.section-header .t-label { flex-shrink: 0; }

.section-title-block { margin-bottom: var(--sp-xl); }
.section-eyebrow { margin-bottom: var(--sp-sm); }
.section-intro {
  font-size: 1.1rem;
  color: var(--c-ink-soft);
  max-width: 640px;
  line-height: 1.7;
}

/* ── CARDS ── */
.card {
  background: var(--c-bg-2);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: var(--sp-lg);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.card:hover {
  border-color: var(--c-border-md);
  transform: translateY(-2px);
  box-shadow: 0 14px 42px rgba(4, 17, 34, 0.34);
}
.card-gold { border-color: rgba(201,168,76,0.2); }
.card-gold:hover { border-color: rgba(201,168,76,0.4); box-shadow: 0 12px 40px rgba(201,168,76,0.08); }

.card-tag {
  display: inline-block;
  font-family: var(--f-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 2px;
  margin-bottom: var(--sp-sm);
}
.card-tag-gold { background: var(--c-gold-dim); color: var(--c-gold); }
.card-tag-blue { background: var(--c-blue-dim); color: var(--c-blue); }
.card-tag-teal { background: rgba(58,170,138,0.12); color: var(--c-teal); }

.card-title { font-family: var(--f-display); font-size: 1.3rem; font-weight: 400; margin-bottom: 0.75rem; }
.card-body { font-size: 0.9rem; color: var(--c-ink-soft); line-height: 1.65; margin-bottom: var(--sp-sm); }
.card-links { display: flex; flex-wrap: wrap; gap: 8px; }
.card-link {
  font-family: var(--f-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-gold);
  border-bottom: 1px solid rgba(201,168,76,0.3);
  padding-bottom: 1px;
  transition: border-color var(--dur) var(--ease);
}
.card-link::after { content: ' ↗'; font-size: 0.7em; }
.card-link:hover { border-color: var(--c-gold); }

/* ── INLINE LINK ── */
.link {
  color: var(--c-gold);
  border-bottom: 1px solid rgba(201,168,76,0.3);
  transition: border-color var(--dur) var(--ease);
}
.link:hover { border-color: var(--c-gold); }

/* ── STAT BLOCKS ── */
.stat-block { text-align: center; padding: var(--sp-md); }
.stat-num {
  font-family: var(--f-display);
  font-size: 3rem;
  font-weight: 300;
  color: var(--c-gold);
  line-height: 1;
  margin-bottom: 8px;
}
.stat-label { font-family: var(--f-mono); font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--c-ink-muted); }
.stat-sub { font-size: 0.8rem; color: var(--c-ink-soft); margin-top: 6px; }

/* ── PULLQUOTE ── */
.pullquote {
  border-left: 2px solid var(--c-gold);
  padding: var(--sp-sm) 0 var(--sp-sm) var(--sp-md);
  margin: var(--sp-lg) 0;
}
.pullquote-text {
  font-family: var(--f-display);
  font-size: 1.35rem;
  font-style: italic;
  font-weight: 300;
  color: var(--c-ink);
  line-height: 1.5;
  margin-bottom: 8px;
}
.pullquote-source {
  font-family: var(--f-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-ink-muted);
}

/* ── SPECTRUM VISUALISER ── */
.spectrum-container { margin: var(--sp-lg) 0; }
.spectrum-bar {
  position: relative;
  height: 8px;
  border-radius: 4px;
  background: linear-gradient(to right, #4a8fd4 0%, #534AB7 30%, #993556 60%, #993C1D 100%);
  margin-bottom: var(--sp-sm);
}
.spectrum-marker {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 14px; height: 14px;
  border-radius: 50%;
  border: 2px solid var(--c-bg);
}
.spectrum-nodes {
  display: flex;
  justify-content: space-between;
}
.spectrum-node { text-align: center; flex: 1; }
.spectrum-node-label { font-family: var(--f-mono); font-size: 0.65rem; letter-spacing: 0.1em; text-transform: uppercase; }

/* ── TIMELINE ── */
.timeline { position: relative; padding-left: 80px; }
.timeline::before {
  content: '';
  position: absolute;
  left: 40px;
  top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--c-border) 10%, var(--c-border) 90%, transparent);
}
.tl-entry { position: relative; margin-bottom: var(--sp-xl); }
.tl-year {
  position: absolute;
  left: -80px;
  top: 4px;
  width: 70px;
  text-align: right;
  font-family: var(--f-mono);
  font-size: 0.68rem;
  color: var(--c-ink-muted);
  letter-spacing: 0.05em;
}
.tl-dot {
  position: absolute;
  left: -46px;
  top: 8px;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--c-bg-2);
  border: 1.5px solid var(--c-gold);
  z-index: 1;
}
.tl-dot.filled { background: var(--c-gold); }
.tl-dot.future { border-color: var(--c-border-md); }
.tl-title { font-family: var(--f-display); font-size: 1.1rem; font-weight: 400; margin-bottom: 6px; }
.tl-body { font-size: 0.9rem; color: var(--c-ink-soft); line-height: 1.65; }
.tl-body a { color: var(--c-gold); border-bottom: 1px solid rgba(201,168,76,0.3); font-size: 0.85rem; }
.tl-tag {
  display: inline-block;
  font-family: var(--f-mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 2px;
  background: var(--c-gold-dim);
  color: var(--c-gold);
  margin-bottom: 8px;
}

/* ── STANDARD PILL ── */
.std-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--f-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 10px 4px 6px;
  border-radius: 100px;
  border: 1px solid var(--c-border-md);
  color: var(--c-ink-soft);
  transition: all var(--dur) var(--ease);
}
.std-pill-dot { width: 6px; height: 6px; border-radius: 50%; }
.std-pill:hover { border-color: var(--c-gold); color: var(--c-gold); }

/* ── ACCORDION / FAQ ── */
.faq-item {
  border-bottom: 1px solid var(--c-border);
}
.faq-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-md) 0;
  font-family: var(--f-display);
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--c-ink);
  text-align: left;
  cursor: pointer;
  gap: var(--sp-md);
  transition: color var(--dur) var(--ease);
}
.faq-trigger:hover { color: var(--c-gold); }
.faq-icon {
  width: 24px; height: 24px;
  border: 1px solid var(--c-border-md);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  font-size: 14px;
  color: var(--c-ink-muted);
  transition: all var(--dur) var(--ease);
}
.faq-item.open .faq-icon { background: var(--c-gold-dim); border-color: var(--c-gold); color: var(--c-gold); transform: rotate(45deg); }
.faq-body {
  display: none;
  padding-bottom: var(--sp-md);
  color: var(--c-ink-soft);
  font-size: 0.95rem;
  line-height: 1.75;
  max-width: 640px;
}
.faq-body a { color: var(--c-gold); border-bottom: 1px solid rgba(201,168,76,0.3); }
.faq-body[hidden] { display: none !important; }
.faq-item.open .faq-body { display: block; }

/* ── GLOSSARY ── */
.glossary-grid { columns: 2; gap: var(--sp-xl); margin-top: var(--sp-lg); }
.gloss-entry { break-inside: avoid; margin-bottom: var(--sp-md); padding-bottom: var(--sp-md); border-bottom: 1px solid var(--c-border); }
.gloss-term { font-family: var(--f-display); font-size: 1.05rem; font-weight: 400; color: var(--c-ink); margin-bottom: 4px; }
.gloss-tag { font-family: var(--f-mono); font-size: 0.6rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--c-gold); margin-left: 8px; }
.gloss-def { font-size: 0.875rem; color: var(--c-ink-soft); line-height: 1.65; }
.gloss-def a { color: var(--c-gold); border-bottom: 1px solid rgba(201,168,76,0.3); font-size: 0.8rem; }

/* ── BIBLIOGRAPHY ── */
.bib-entry {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: var(--sp-sm);
  padding: var(--sp-md) 0;
  border-bottom: 1px solid var(--c-border);
}
.bib-num { font-family: var(--f-mono); font-size: 0.72rem; color: var(--c-ink-muted); padding-top: 2px; }
.bib-title { font-family: var(--f-display); font-size: 0.95rem; font-style: italic; margin-bottom: 4px; color: var(--c-ink); }
.bib-authors { font-family: var(--f-mono); font-size: 0.72rem; color: var(--c-ink-muted); margin-bottom: 3px; }
.bib-venue { font-size: 0.85rem; color: var(--c-ink-soft); margin-bottom: 4px; }
.bib-doi a { font-family: var(--f-mono); font-size: 0.68rem; color: var(--c-gold); border-bottom: 1px solid rgba(201,168,76,0.3); }

/* ── CITATION BOX ── */
.citation-box {
  background: var(--c-bg-3);
  border: 1px solid rgba(201,168,76,0.2);
  border-left: 3px solid var(--c-gold);
  border-radius: var(--radius-md);
  padding: var(--sp-lg);
  margin: var(--sp-lg) 0;
}
.citation-text { font-family: var(--f-display); font-style: italic; font-size: 1.1rem; color: var(--c-ink-soft); line-height: 1.6; margin-bottom: var(--sp-sm); }
.citation-meta { font-family: var(--f-mono); font-size: 0.7rem; color: var(--c-ink-muted); letter-spacing: 0.05em; }
.citation-meta a { color: var(--c-gold); border-bottom: 1px solid rgba(201,168,76,0.3); }
.citation-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: var(--sp-md);
}

/* ── DATA CALLOUT ── */
.data-bar {
  display: flex;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.data-bar-item {
  flex: 1;
  padding: var(--sp-md);
  border-right: 1px solid var(--c-border);
  text-align: center;
}
.data-bar-item:last-child { border-right: none; }
.data-bar-num { font-family: var(--f-display); font-size: 2rem; font-weight: 300; color: var(--c-gold); line-height: 1; margin-bottom: 6px; }
.data-bar-label { font-family: var(--f-mono); font-size: 0.65rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--c-ink-muted); }

/* ── PERSON CARD ── */
.person-card { padding: var(--sp-md); }
.person-role { font-family: var(--f-mono); font-size: 0.65rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--c-ink-muted); margin-bottom: 4px; }
.person-name { font-family: var(--f-display); font-size: 1.2rem; font-weight: 400; margin-bottom: 4px; }
.person-affil { font-family: var(--f-mono); font-size: 0.72rem; color: var(--c-gold); margin-bottom: var(--sp-sm); }
.person-body { font-size: 0.875rem; color: var(--c-ink-soft); line-height: 1.65; margin-bottom: var(--sp-sm); }
.person-link a { font-family: var(--f-mono); font-size: 0.68rem; color: var(--c-gold); border-bottom: 1px solid rgba(201,168,76,0.3); }

/* ── NEWSLETTER ── */
#newsletter-form,
.newsletter-form {
  display: flex;
  gap: var(--sp-sm);
  max-width: 480px;
  margin-top: var(--sp-md);
}
.newsletter-input {
  flex: 1;
  background: var(--c-bg-3);
  border: 1px solid var(--c-border-md);
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  color: var(--c-ink);
  font-family: var(--f-body);
  font-size: 0.9rem;
  outline: none;
  transition: border-color var(--dur) var(--ease);
}
.newsletter-input:focus { border-color: var(--c-gold); }
.newsletter-input::placeholder { color: var(--c-ink-muted); }
.newsletter-status {
  min-height: 1.4em;
  margin-top: 0.75rem;
  color: var(--c-gold);
}

/* ── TAB SYSTEM ── */
.tab-nav {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--c-border);
  margin-bottom: var(--sp-lg);
  overflow-x: auto;
}
.tab-btn {
  font-family: var(--f-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-ink-muted);
  padding: 12px var(--sp-md);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  white-space: nowrap;
  transition: all var(--dur) var(--ease);
  flex-shrink: 0;
}
.tab-btn:hover { color: var(--c-ink); }
.tab-btn.active { color: var(--c-gold); border-bottom-color: var(--c-gold); }
.tab-pane { display: none; }
.tab-pane.active { display: block; }

/* ── DARK SECTION ── */
.section-dark { background: var(--c-bg-2); }
.section-darker { background: var(--c-bg-3); }
.section-surface { background: var(--c-bg-4); }

/* ── BADGE ── */
.badge {
  display: inline-block;
  font-family: var(--f-mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 2px;
  vertical-align: middle;
  margin-left: 6px;
}
.badge-new { background: rgba(58,170,138,0.15); color: var(--c-teal); }
.badge-draft { background: rgba(201,168,76,0.1); color: var(--c-gold); }

/* ── PAGE HERO (inner pages) ── */
.page-hero {
  padding: calc(64px + var(--sp-2xl)) 0 var(--sp-xl);
  border-bottom: 1px solid var(--c-border);
  position: relative;
  overflow: hidden;
}
.page-hero-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 80% at 80% 50%, rgba(201,168,76,0.04) 0%, transparent 70%);
  pointer-events: none;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--f-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-ink-muted);
  margin-bottom: var(--sp-md);
}
.breadcrumb a { color: var(--c-ink-muted); transition: color var(--dur) var(--ease); }
.breadcrumb a:hover { color: var(--c-gold); }
.breadcrumb-sep { color: var(--c-border-md); }

/* ── SIDE NAV (in-page) ── */
.side-nav {
  position: sticky;
  top: calc(64px + var(--sp-lg));
}
.side-nav-title { margin-bottom: var(--sp-sm); }
.side-nav-links { display: flex; flex-direction: column; gap: 4px; }
.side-nav-link {
  font-family: var(--f-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-ink-muted);
  padding: 6px 0;
  border-left: 2px solid transparent;
  padding-left: var(--sp-sm);
  transition: all var(--dur) var(--ease);
}
.side-nav-link:hover { color: var(--c-ink); border-left-color: var(--c-border-md); }
.side-nav-link.active { color: var(--c-gold); border-left-color: var(--c-gold); }

/* ── FOOTER ── */
footer {
  background: var(--c-bg-2);
  border-top: 1px solid var(--c-border);
  padding: var(--sp-2xl) 0 var(--sp-lg);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--sp-xl);
  margin-bottom: var(--sp-xl);
}
.footer-brand-name {
  font-family: var(--f-display);
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--c-ink);
  margin-bottom: var(--sp-sm);
}
.footer-brand-name em { color: var(--c-gold); font-style: normal; }
.footer-desc { font-size: 0.875rem; color: var(--c-ink-soft); max-width: 280px; line-height: 1.65; margin-bottom: var(--sp-md); }
.footer-col-title {
  font-family: var(--f-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-ink-muted);
  margin-bottom: var(--sp-sm);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--c-border);
}
.footer-links { display: flex; flex-direction: column; gap: 8px; }
.footer-links a {
  font-size: 0.875rem;
  color: var(--c-ink-soft);
  transition: color var(--dur) var(--ease);
  display: flex;
  align-items: center;
  gap: 6px;
}
.footer-links a:hover { color: var(--c-gold); }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--sp-md);
  border-top: 1px solid var(--c-border);
  flex-wrap: wrap;
  gap: var(--sp-sm);
}
.footer-bottom-text { font-family: var(--f-mono); font-size: 0.65rem; color: var(--c-ink-muted); letter-spacing: 0.06em; }
.footer-bottom-links { display: flex; gap: var(--sp-md); }
.footer-bottom-links a { font-family: var(--f-mono); font-size: 0.65rem; color: var(--c-ink-muted); letter-spacing: 0.06em; transition: color var(--dur) var(--ease); }
.footer-bottom-links a:hover { color: var(--c-gold); }

/* ── ANIMATIONS ── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ── PROGRESS BAR ── */
#read-progress {
  position: fixed;
  top: 64px; left: 0;
  height: 2px;
  background: var(--c-gold);
  z-index: 999;
  transition: width 0.1s linear;
  width: 0%;
}

/* ── BACK TO TOP ── */
#back-top {
  position: fixed;
  bottom: var(--sp-lg);
  right: var(--sp-lg);
  width: 44px; height: 44px;
  background: var(--c-bg-3);
  border: 1px solid var(--c-border-md);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--c-ink-soft);
  font-size: 18px;
  z-index: 900;
  opacity: 0;
  pointer-events: none;
  transition: all var(--dur) var(--ease);
  cursor: pointer;
}
#back-top.visible { opacity: 1; pointer-events: all; }
#back-top:hover { border-color: var(--c-gold); color: var(--c-gold); background: var(--c-gold-dim); }

/* ── SEARCH ── */
.search-bar {
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
  background: var(--c-bg-3);
  border: 1px solid var(--c-border-md);
  border-radius: var(--radius-md);
  padding: 10px 16px;
  max-width: 500px;
}
.search-icon { color: var(--c-ink-muted); font-size: 14px; }
.search-input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--c-ink);
  font-family: var(--f-body);
  font-size: 0.9rem;
}
.search-input::placeholder { color: var(--c-ink-muted); }

/* ── RESOURCE CARD ── */
.resource-card {
  display: flex;
  gap: var(--sp-md);
  padding: var(--sp-md);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  background: var(--c-bg-2);
  transition: all var(--dur) var(--ease);
}
.resource-card:hover { border-color: var(--c-border-md); transform: translateX(4px); }
.resource-icon {
  width: 44px; height: 44px;
  border-radius: var(--radius-sm);
  background: var(--c-gold-dim);
  display: flex; align-items: center; justify-content: center;
  color: var(--c-gold);
  font-size: 18px;
  flex-shrink: 0;
}
.resource-title { font-family: var(--f-display); font-size: 1rem; font-weight: 400; margin-bottom: 4px; }
.resource-meta { font-family: var(--f-mono); font-size: 0.65rem; color: var(--c-ink-muted); letter-spacing: 0.08em; text-transform: uppercase; }

/* ── HIGHLIGHT BOX ── */
.highlight-box {
  background: var(--c-gold-glow);
  border: 1px solid rgba(201,168,76,0.15);
  border-radius: var(--radius-md);
  padding: var(--sp-md);
}
.highlight-box-label {
  font-family: var(--f-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-gold);
  margin-bottom: 8px;
}

/* ── SIGNAL BAND ── */
.signal-band {
  position: relative;
  z-index: 1;
}
.signal-head {
  max-width: 760px;
  margin-bottom: var(--sp-lg);
}
.signal-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--sp-md);
}
.signal-card {
  padding: clamp(1.15rem, 2vw, 1.5rem);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0)),
    radial-gradient(circle at top left, rgba(201,168,76,0.12), transparent 55%),
    var(--c-bg-2);
  box-shadow: 0 18px 50px rgba(4, 17, 34, 0.22);
}
.signal-card-accent {
  border-color: rgba(201,168,76,0.28);
  background:
    linear-gradient(180deg, rgba(201,168,76,0.06), rgba(255,255,255,0)),
    radial-gradient(circle at top left, rgba(201,168,76,0.14), transparent 55%),
    var(--c-bg-2);
}
.signal-label {
  margin-bottom: 12px;
  font-family: var(--f-mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-gold);
}
.signal-title {
  margin-bottom: 0.85rem;
  font-family: var(--f-display);
  font-size: 1.45rem;
  font-weight: 400;
  line-height: 1.15;
}
.signal-copy {
  color: var(--c-ink-soft);
  font-size: 0.95rem;
  line-height: 1.72;
}
.signal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: var(--sp-md);
}
@media (max-width: 1360px) {
  .page-rail { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ── RESPONSIVE ── */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .signal-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  :root { --sp-xl: 3rem; --sp-2xl: 4rem; }
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .container { padding: 0 var(--sp-sm); }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: var(--sp-lg); }
  .data-bar { flex-direction: column; }
  .data-bar-item { border-right: none; border-bottom: 1px solid var(--c-border); }
  .data-bar-item:last-child { border-bottom: none; }
  .hero-meta { flex-direction: column; }
  .hero-meta-item { border-right: none; border-bottom: 1px solid var(--c-border); }
  .timeline { padding-left: 60px; }
  .tl-year { left: -60px; width: 50px; font-size: 0.6rem; }
  .tl-dot { left: -36px; }
  .timeline::before { left: 30px; }
  .glossary-grid { columns: 1; }
  #newsletter-form,
  .newsletter-form { flex-direction: column; }
  .tab-nav { gap: 0; }
  .tab-btn { padding: 10px var(--sp-sm); font-size: 0.62rem; }
}
@media (max-width: 480px) {
  .hero-title { line-height: 1; }
  .hero-title .line-2 { padding-left: var(--sp-md); }
}