:root {
  --bg: #ffffff;
  --text: #1d1d1f;
  --muted: #5f6368;
  --accent: #0a66d6;
  --card: #f4f6f9;
  --rule: #dfe3e8;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111214;
    --text: #f2f2f4;
    --muted: #a7abb2;
    --accent: #5aa2ff;
    --card: #1b1d21;
    --rule: #2c2f35;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
main { max-width: 760px; margin: 0 auto; padding: 32px 20px 64px; }
nav { display: flex; gap: 18px; flex-wrap: wrap; font-size: 15px; margin-bottom: 28px; }
nav a { color: var(--accent); text-decoration: none; }
nav a[aria-current="page"] { color: var(--text); font-weight: 600; }
h1 { font-size: 32px; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 21px; margin: 32px 0 8px; }
h3 { font-size: 17px; margin: 20px 0 4px; }
p, li { color: var(--text); }
.subtitle, .updated { color: var(--muted); margin-top: 0; }
a { color: var(--accent); }
.card { background: var(--card); border-radius: 12px; padding: 16px 20px; margin: 20px 0; }
.card p:first-child { margin-top: 0; }
.card p:last-child { margin-bottom: 0; }
pre {
  white-space: pre-wrap;
  background: var(--card);
  border-radius: 8px;
  padding: 14px 16px;
  font-size: 13px;
  line-height: 1.45;
  overflow-wrap: anywhere;
}
hr { border: 0; border-top: 1px solid var(--rule); margin: 32px 0; }
footer { color: var(--muted); font-size: 14px; margin-top: 40px; }