:root {
  --bg: #fbf8fc;
  --text: #1c1b1f;
  --muted: #5f5b66;
  --accent: #6750a4;
  --rule: #e4dfea;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141218;
    --text: #e6e0e9;
    --muted: #aaa3b3;
    --accent: #cfbcff;
    --rule: #2f2b36;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 720px; margin: 0 auto; padding: 32px 16px 64px; }
h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 1.3rem; margin: 32px 0 8px; padding-top: 16px; border-top: 1px solid var(--rule); }
h3 { font-size: 1.05rem; margin: 20px 0 4px; }
p, li { max-width: 68ch; }
ul { padding-left: 1.2em; }
a { color: var(--accent); }
code { font-size: 0.9em; overflow-wrap: anywhere; }
.lead { font-size: 1.15rem; }
.muted { color: var(--muted); font-size: 0.92rem; }