:root {
  --bg: #fbfaf7;
  --text: #1c1c1a;
  --muted: #5d5b55;
  --rule: #e3e0d8;
  --link: #1f4e8c;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161614;
    --text: #ecebe6;
    --muted: #a7a49c;
    --rule: #33322e;
    --link: #8fb4ea;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
.wrap { max-width: 680px; margin: 0 auto; padding: 0 20px; }
header { padding: 28px 0 0; }
header a { color: var(--text); text-decoration: none; font-weight: 600; letter-spacing: -0.01em; }
main { padding: 64px 0 72px; }
h1 { font-size: 2.1rem; line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 24px; }
h2 { font-size: 1.15rem; margin: 36px 0 8px; }
p, li { color: var(--text); }
.lede { font-size: 1.1rem; }
.muted { color: var(--muted); }
a { color: var(--link); }
footer { border-top: 1px solid var(--rule); padding: 24px 0 40px; font-size: 0.9rem; color: var(--muted); }
footer nav { margin-top: 8px; }
footer nav a { margin-right: 16px; }
@media (max-width: 480px) {
  h1 { font-size: 1.7rem; }
  main { padding: 40px 0 56px; }
}