:root {
  --bg: #fbfaf7;
  --fg: #1d1c1a;
  --muted: #6b6760;
  --line: #e4e0d8;
  --accent: #3b5bdb;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141413;
    --fg: #ecebe7;
    --muted: #a19d95;
    --line: #2c2b28;
    --accent: #8ea4ff;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.6 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main, header, footer { max-width: 680px; margin: 0 auto; padding: 0 20px; }
header { padding-top: 40px; display: flex; justify-content: space-between; align-items: baseline; gap: 16px; flex-wrap: wrap; }
.brand { font-weight: 650; letter-spacing: 0.02em; color: var(--fg); text-decoration: none; font-size: 19px; }
nav a { color: var(--muted); text-decoration: none; margin-left: 18px; font-size: 15px; }
nav a:first-child { margin-left: 0; }
nav a:hover, nav a[aria-current] { color: var(--fg); }
main { padding-top: 56px; padding-bottom: 56px; }
h1 { font-size: 34px; line-height: 1.2; margin: 0 0 16px; letter-spacing: -0.01em; }
h2 { font-size: 20px; margin: 40px 0 8px; }
p, ul, ol { margin: 0 0 14px; }
li { margin-bottom: 6px; }
a { color: var(--accent); }
.lead { font-size: 20px; color: var(--muted); }
.updated { color: var(--muted); font-size: 15px; }
.card { border: 1px solid var(--line); border-radius: 10px; padding: 18px 20px; margin: 28px 0; }
.card p:last-child { margin-bottom: 0; }
footer { border-top: 1px solid var(--line); padding-top: 20px; padding-bottom: 40px; color: var(--muted); font-size: 14px; }
footer a { color: var(--muted); }