:root {
  --bg: #ffffff;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --accent: #1f6feb;
  --rule: #e5e5ea;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111113;
    --text: #f2f2f7;
    --muted: #a1a1a6;
    --accent: #5aa2ff;
    --rule: #2c2c2e;
  }
}
* { 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: 720px; margin: 0 auto; padding: 48px 20px 64px; }
header { display: flex; align-items: center; gap: 14px; margin-bottom: 8px; }
header img { width: 56px; height: 56px; border-radius: 13px; }
h1 { font-size: 2rem; margin: 0; }
h2 { font-size: 1.25rem; margin-top: 2em; }
p, li { color: var(--text); }
.lead { color: var(--muted); font-size: 1.1rem; margin-top: 0; }
.muted { color: var(--muted); font-size: 0.9rem; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
nav { margin: 24px 0 8px; display: flex; gap: 20px; flex-wrap: wrap; }
hr { border: none; border-top: 1px solid var(--rule); margin: 40px 0 16px; }
code { font-size: 0.9em; }