:root {
  color-scheme: dark;
  --bg: #121416;
  --surface: #1a1d20;
  --surface-strong: #202428;
  --text: #f6f6f3;
  --muted: #b9bdc1;
  --line: #34393e;
  --brand: #ffd324;
  --brand-ink: #171500;
  --max: 1080px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 280px;
  background:
    radial-gradient(circle at 90% 0%, rgba(255, 211, 36, .08), transparent 26rem),
    var(--bg);
  color: var(--text);
  font-size: 17px;
  line-height: 1.7;
}

a { color: var(--brand); text-underline-offset: .2em; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible { outline: 3px solid var(--brand); outline-offset: 4px; border-radius: 3px; }

.skip-link {
  position: fixed;
  top: .75rem;
  left: .75rem;
  z-index: 10;
  transform: translateY(-150%);
  padding: .6rem .8rem;
  border-radius: .5rem;
  background: var(--brand);
  color: var(--brand-ink);
  font-weight: 800;
}
.skip-link:focus { transform: none; }

.wrap { width: min(calc(100% - 2rem), var(--max)); margin-inline: auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  border-bottom: 1px solid rgba(255,255,255,.08);
  background: rgba(18, 20, 22, .92);
  backdrop-filter: blur(12px);
}

.nav {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .65rem;
  color: var(--text);
  font-size: 1.15rem;
  font-weight: 850;
  text-decoration: none;
  letter-spacing: -.02em;
}

.brand-mark {
  display: grid;
  width: 38px;
  aspect-ratio: 1;
  place-items: center;
  border-radius: 11px;
  background: var(--brand);
  color: var(--brand-ink);
  font-size: 1.25rem;
  font-weight: 950;
}

.nav-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: .35rem 1.1rem; }
.nav-links a { color: var(--muted); font-size: .92rem; font-weight: 650; text-decoration: none; }
.nav-links a[aria-current="page"], .nav-links a:hover { color: var(--brand); }

.hero { padding: clamp(4rem, 10vw, 7.5rem) 0 4rem; }
.eyebrow { margin: 0 0 1rem; color: var(--brand); font-size: .86rem; font-weight: 850; letter-spacing: .12em; text-transform: uppercase; }
h1, h2, h3 { line-height: 1.18; letter-spacing: -.035em; }
h1 { max-width: 850px; margin: 0; font-size: clamp(2.7rem, 7vw, 5.4rem); }
.lead { max-width: 760px; margin: 1.5rem 0 0; color: var(--muted); font-size: clamp(1.1rem, 2vw, 1.32rem); }
.hero-actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 2rem; }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: .7rem 1rem;
  border: 1px solid var(--line);
  border-radius: .7rem;
  color: var(--text);
  font-weight: 800;
  text-decoration: none;
}
.button.primary { border-color: var(--brand); background: var(--brand); color: var(--brand-ink); }
.button:hover { border-color: var(--brand); }

.section { padding: 4rem 0; border-top: 1px solid var(--line); }
.section h2 { margin: 0 0 .8rem; font-size: clamp(1.7rem, 4vw, 2.5rem); }
.section-intro { max-width: 720px; margin: 0 0 2rem; color: var(--muted); }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.card { padding: 1.4rem; border: 1px solid var(--line); border-radius: 1rem; background: var(--surface); }
.card h3 { margin: 0 0 .5rem; font-size: 1.2rem; }
.card p { margin: 0; color: var(--muted); }
.card a { display: inline-block; margin-top: 1rem; font-weight: 800; }

.notice {
  margin-top: 2rem;
  padding: 1.15rem 1.25rem;
  border-left: 4px solid var(--brand);
  border-radius: 0 .6rem .6rem 0;
  background: rgba(255, 211, 36, .08);
}
.notice p { margin: 0; }

.document { width: min(calc(100% - 2rem), 820px); margin: 0 auto; padding: clamp(3rem, 8vw, 6rem) 0; }
.document-header { padding-bottom: 2rem; border-bottom: 1px solid var(--line); }
.document h1 { font-size: clamp(2.4rem, 6vw, 4rem); }
.document h2 { margin: 2.7rem 0 .8rem; font-size: 1.55rem; }
.document h3 { margin: 1.8rem 0 .5rem; font-size: 1.16rem; }
.document p, .document li { color: #d8dadb; }
.document ul, .document ol { padding-left: 1.3rem; }
.document li + li { margin-top: .55rem; }
.meta { margin: 1rem 0 0; color: var(--muted); font-size: .95rem; }
.toc { margin: 2rem 0; padding: 1.25rem 1.5rem; border: 1px solid var(--line); border-radius: .8rem; background: var(--surface); }
.toc strong { display: block; margin-bottom: .4rem; }
.toc ol { margin: 0; columns: 2; }

.site-footer { padding: 2.5rem 0; border-top: 1px solid var(--line); color: var(--muted); font-size: .9rem; }
.footer-row { display: flex; justify-content: space-between; align-items: flex-start; gap: 2rem; }
.footer-row p { max-width: 670px; margin: 0; }
.footer-links { display: flex; flex-wrap: wrap; gap: .5rem 1rem; }

@media (max-width: 760px) {
  body { font-size: 16px; }
  .nav { align-items: flex-start; padding: .85rem 0; }
  .nav-links { max-width: 180px; }
  .grid { grid-template-columns: 1fr; }
  .toc ol { columns: 1; }
  .footer-row { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}