:root {
  --bg: #ffffff;
  --fg: #1f2328;
  --muted: #59636e;
  --accent: #188038;
  --card: #f6f8fa;
  --border: #d1d9e0;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --fg: #e6edf3;
    --muted: #9198a1;
    --accent: #3fb950;
    --card: #161b22;
    --border: #30363d;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main, header, footer { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header { padding-top: 32px; }
header a.brand { color: var(--fg); text-decoration: none; font-weight: 700; font-size: 1.1rem; }
nav { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 8px; }
nav a, a { color: var(--accent); }
h1 { font-size: 2rem; line-height: 1.2; margin: 32px 0 8px; }
h2 { font-size: 1.3rem; margin-top: 32px; }
.lead { font-size: 1.15rem; color: var(--muted); }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: 16px 20px; margin: 16px 0; }
ul, ol { padding-left: 1.3rem; }
code { background: var(--card); border: 1px solid var(--border); border-radius: 4px; padding: 0 4px; }
table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
th, td { text-align: left; border-bottom: 1px solid var(--border); padding: 8px 6px; vertical-align: top; }
.updated { color: var(--muted); font-size: 0.9rem; }
footer { margin-top: 48px; padding-bottom: 32px; color: var(--muted); font-size: 0.9rem; border-top: 1px solid var(--border); padding-top: 16px; }