:root {
  color-scheme: dark;
  --bg: #020617;
  --bg2: #0f172a;
  --panel: rgba(15, 23, 42, 0.7);
  --border: rgba(51, 65, 85, 0.6);
  --text: #cbd5e1;
  --heading: #e2e8f0;
  --muted: #94a3b8;
  --sky: #38bdf8;
  --amber: #f59e0b;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  color: var(--text);
  line-height: 1.6;
  background:
    radial-gradient(circle at 15% 10%, rgba(14, 165, 233, 0.08) 0%, transparent 45%),
    radial-gradient(circle at 85% 20%, rgba(245, 158, 11, 0.07) 0%, transparent 45%),
    linear-gradient(to bottom, var(--bg), var(--bg2));
  background-attachment: fixed;
  min-height: 100vh;
}
.wrap { max-width: 820px; margin: 0 auto; padding: 2rem 1.25rem 4rem; }
header.doc {
  border-bottom: 1px solid var(--border);
  padding-bottom: 1.25rem;
  margin-bottom: 1.5rem;
}
.brand {
  font-family: 'Orbitron', var(--heading), sans-serif;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.8rem;
  color: var(--sky);
  text-decoration: none;
}
h1 {
  font-family: 'Orbitron', sans-serif;
  color: var(--heading);
  font-size: clamp(1.5rem, 4vw, 2.1rem);
  margin: 0.6rem 0 0.3rem;
  letter-spacing: 0.02em;
}
.updated { color: var(--muted); font-size: 0.85rem; margin: 0; }
.toc {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1rem 1.25rem;
  margin: 0 0 2rem;
  backdrop-filter: blur(8px);
}
.toc strong { color: var(--heading); display: block; margin-bottom: 0.5rem; font-size: 0.9rem; }
.toc ol { margin: 0; padding-left: 1.2rem; columns: 2; column-gap: 1.5rem; font-size: 0.9rem; }
.toc a { color: var(--text); text-decoration: none; }
.toc a:hover { color: var(--sky); }
h2 {
  font-family: 'Orbitron', sans-serif;
  color: var(--heading);
  font-size: 1.15rem;
  margin: 2rem 0 0.6rem;
  padding-top: 0.5rem;
  border-top: 1px solid rgba(51, 65, 85, 0.35);
}
h2:first-of-type { border-top: none; }
h3 { color: var(--heading); font-size: 1rem; margin: 1.2rem 0 0.4rem; }
a { color: var(--sky); }
strong { color: var(--heading); }
ul, ol.body { padding-left: 1.3rem; }
li { margin: 0.3rem 0; }
table { width: 100%; border-collapse: collapse; margin: 1rem 0; font-size: 0.9rem; }
th, td { border: 1px solid var(--border); padding: 0.5rem 0.7rem; text-align: left; vertical-align: top; }
th { background: rgba(30, 41, 59, 0.6); color: var(--heading); }
.note {
  background: rgba(245, 158, 11, 0.08);
  border-left: 3px solid var(--amber);
  padding: 0.75rem 1rem;
  border-radius: 0 10px 10px 0;
  margin: 1.25rem 0;
  font-size: 0.9rem;
}
footer.doc {
  margin-top: 3rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.85rem;
}
footer.doc a { margin-right: 1rem; }
.back { display: inline-block; margin-bottom: 1rem; color: var(--muted); text-decoration: none; font-size: 0.85rem; }
.back:hover { color: var(--sky); }