:root {
  --bg: #fbfaf7;
  --fg: #1d1c1a;
  --muted: #5d5a54;
  --rule: #e2ded6;
  --accent: #2f5f8a;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161514;
    --fg: #ecebe7;
    --muted: #a8a49c;
    --rule: #33312d;
    --accent: #8fb8de;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
}
main { max-width: 40rem; margin: 0 auto; padding: 3rem 16px 4rem; }
header { margin-bottom: 2.5rem; }
.brand { font-weight: 700; letter-spacing: 0.02em; color: var(--muted); text-decoration: none; }
h1 { font-size: 2rem; line-height: 1.2; margin: 0.4rem 0 0.2rem; }
h2 { font-size: 1.15rem; margin: 2.2rem 0 0.4rem; }
.updated { color: var(--muted); margin: 0; }
.lede { font-size: 1.2rem; font-weight: 600; }
a { color: var(--accent); }
nav { display: flex; gap: 1.25rem; margin-top: 3rem; padding-top: 1.25rem; border-top: 1px solid var(--rule); }
footer { color: var(--muted); font-size: 0.9rem; margin-top: 1rem; }