:root {
  color-scheme: dark;
  --gc-gold: #dcc58a;
  --gc-cyan: #8ed4ce;
  --gc-gold-hi: #f1e2b3;
  --gc-ease: cubic-bezier(.16, 1, .3, 1);
  --ink: #f4f7fb;
  --muted: #c1cbd7;
  --line: rgba(202, 218, 235, .14);
  --glass: rgba(17, 26, 37, .72);
  --glass-strong: rgba(28, 42, 59, .88);
  --bg: #0b111a;
  --text: linear-gradient(100deg, var(--gc-gold-hi) 0%, var(--gc-gold) 38%, var(--gc-cyan) 100%);
  --text-muted: linear-gradient(100deg, #e3d6ae 0%, #cdb97f 40%, #86c4bf 100%);
  --line-grad: linear-gradient(90deg, transparent, var(--gc-gold) 20%, var(--gc-cyan) 80%, transparent);
  --glow: inset 0 1px 0 rgba(255, 255, 255, .06), 0 0 18px rgba(220, 197, 138, .14), 0 8px 22px rgba(0, 0, 0, .28);
  --sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-padding-top: 1.5rem; }
body {
  margin: 0;
  color: var(--ink);
  background: radial-gradient(circle at 50% 0%, #152233 0%, var(--bg) 42%);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  overflow-wrap: anywhere;
}
a { color: #e8dcb5; text-underline-offset: .22em; }
a:hover { color: var(--gc-gold-hi); }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 2px solid var(--gc-cyan);
  outline-offset: 3px;
  border-radius: 4px;
}
::selection { background: #245e58; color: #fff; }
h1, h2, h3, p { margin: 0; }
h1, h2, h3 { font-weight: 600; line-height: 1.12; text-wrap: balance; color: var(--gc-gold-hi); }
h1 { font-size: clamp(2rem, 8vw, 3.6rem); letter-spacing: -.03em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); letter-spacing: -.02em; }
h3 { font-size: 1.2rem; }
p + p { margin-top: 1rem; }
ul, ol { padding-left: 1.2rem; margin: .8rem 0 0; }
li + li { margin-top: .45rem; }
.wrap { width: min(100% - 2rem, 1080px); margin-inline: auto; }
.skip-link {
  position: absolute;
  top: .5rem;
  left: 1rem;
  z-index: 10;
  padding: .75rem 1rem;
  background: var(--glass-strong);
  color: var(--ink);
  transform: translateY(-160%);
}
.skip-link:focus { transform: translateY(0); }

.gc-heading, .gc-label {
  background-image: var(--text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--gc-gold-hi);
}
.gc-heading { position: relative; display: inline-block; padding-bottom: .35rem; }
.gc-heading::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--line-grad);
  opacity: .85;
  transform: scaleX(1);
  transform-origin: left center;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1rem;
  position: sticky;
  top: 0;
  z-index: 5;
  background: rgba(11, 17, 26, .86);
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  backdrop-filter: blur(12px) saturate(140%);
}
.brand {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .6rem;
  min-height: 44px;
  color: var(--ink);
  text-decoration: none;
  font-size: 1.25rem;
  font-weight: 600;
}
.brand small { color: var(--muted); font-size: .8rem; font-weight: 500; letter-spacing: .04em; }
.site-nav { display: flex; flex-wrap: wrap; gap: .4rem; }
.site-nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 12px;
  border-radius: 999px;
  text-decoration: none;
  background: rgba(17, 26, 37, .5);
  border: 1px solid rgba(202, 218, 235, .1);
}
.site-nav a[aria-current="page"] {
  background: var(--glass-strong);
  border-color: rgba(220, 197, 138, .22);
  box-shadow: var(--glow);
}
.site-nav a[aria-current="page"]::after,
.button::after {
  content: "";
  position: absolute;
  left: 18%;
  right: 18%;
  bottom: 7px;
  height: 1px;
  background: var(--line-grad);
  opacity: .85;
}
.release-note {
  margin-top: 1rem;
  padding: .85rem 1rem;
  border-radius: 12px;
  color: var(--muted);
  background: var(--glass);
  border: 1px solid var(--line);
}
.release-note strong { color: var(--gc-gold-hi); }
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  padding-block: 2.2rem 3rem;
  align-items: center;
}
.eyebrow, .label, .tag, .section-number {
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--gc-gold);
}
.lede { margin-top: 1rem; font-size: 1.125rem; line-height: 1.55; max-width: 42rem; color: var(--muted); }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: .75rem; margin-top: 1.4rem; }
.button {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 16px;
  border-radius: 7px;
  text-decoration: none;
  background: var(--glass-strong);
  border: 1px solid rgba(220, 197, 138, .22);
  box-shadow: var(--glow);
}
.button:hover { background: rgba(25, 37, 52, .8); }
.text-link { display: inline-flex; align-items: center; min-height: 44px; }
.fine { margin-top: 1rem; color: var(--muted); font-size: .95rem; }
.study-sheet, .panel, .note-card, .feature, .boundary, .report-template {
  background: var(--glass);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .04);
}
.study-sheet { padding: clamp(1.2rem, 3vw, 2rem); }
.study-sheet h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin-block: .8rem 1rem; }
.sheet-row { padding-block: .9rem; border-top: 1px solid var(--line); }
.example-note { margin-top: 1rem; color: var(--muted); font-size: .9rem; }
.section { padding-block: 2.5rem; }
.section-heading { display: grid; grid-template-columns: 6.5rem minmax(0, 1fr); gap: 1rem; margin-bottom: 1.5rem; }
.section-heading p, .feature p, .panel p { color: var(--muted); }
.feature-grid, .two-column { display: grid; gap: 1rem; }
.feature-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.two-column { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.feature, .panel, .note-card { padding: 1.15rem 1.2rem; }
.feature h3, .panel h3 { margin-bottom: .45rem; }
.planned {
  display: inline-block;
  margin-bottom: .6rem;
  padding: .2rem .55rem;
  border-radius: 999px;
  border: 1px solid rgba(220, 197, 138, .28);
  color: var(--gc-gold-hi);
  font-size: .75rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.price { margin-top: .4rem; font-size: 1.8rem; color: var(--ink); }
.price span, .price-alt { font-size: 1rem; color: var(--muted); }
.data-section, .closing, .page-grid {
  display: grid;
  gap: 1.5rem;
}
.data-section, .page-grid { grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); }
.closing {
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  padding-block: 2rem;
  border-top: 1px solid var(--line);
}
.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1.5rem 2rem;
  color: var(--muted);
  font-size: .95rem;
}
.footer-links { display: flex; flex-wrap: wrap; gap: .4rem 1rem; }
.footer-links a { display: inline-flex; align-items: center; min-height: 44px; }
.page-intro { padding-block: 2rem 1rem; max-width: 46rem; }
.article-section + .article-section { margin-top: 1.5rem; }
.article-section h2 { margin-bottom: .7rem; }
.page-sidebar { display: grid; gap: 1rem; align-content: start; }
.contents { list-style: none; margin: 0; padding: 0; }
.contents a { display: inline-flex; align-items: center; min-height: 44px; }
.report-template { padding: 1rem 1.1rem; }
.report-template dt { margin-top: .8rem; color: var(--gc-gold); font-size: .8rem; letter-spacing: .06em; }
.report-template dt:first-child { margin-top: 0; }
.report-template dd { margin: .2rem 0 0; color: var(--muted); }
details { border-top: 1px solid var(--line); }
summary { cursor: pointer; min-height: 44px; padding-block: .6rem; font-weight: 600; }
.hero > *, .page-grid > *, .feature > *, .site-header > * { min-width: 0; }

.delay-0 { --d: 0ms; }
.delay-1 { --d: 60ms; }
.delay-2 { --d: 120ms; }
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    animation: gc-in .6s var(--gc-ease) both;
    animation-delay: var(--d, 0ms);
  }
}
@keyframes gc-in {
  from { opacity: 0; transform: translate3d(0, 8px, 0); }
  to { opacity: 1; transform: none; }
}

@media (max-width: 800px) {
  .hero, .feature-grid, .two-column, .data-section, .page-grid, .closing, .section-heading {
    grid-template-columns: minmax(0, 1fr);
  }
  .site-header { align-items: flex-start; flex-direction: column; }
  .page-sidebar { order: -1; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}