:root {
  --bg: #fbfaf7;
  --text: #1f1d1a;
  --muted: #5f5a52;
  --accent: #2f5d8a;
  --line: #e4e0d8;
  --card: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #171614;
    --text: #ece9e3;
    --muted: #a8a299;
    --accent: #8fb6dd;
    --line: #2f2c28;
    --card: #1f1d1a;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Arial, sans-serif;
}
main, header, footer { max-width: 720px; margin: 0 auto; padding: 0 16px; }
header { padding-top: 28px; padding-bottom: 8px; display: flex; gap: 18px; align-items: baseline; flex-wrap: wrap; }
header .site { font-weight: 700; font-size: 20px; color: var(--text); text-decoration: none; margin-right: auto; }
header nav a { color: var(--muted); text-decoration: none; margin-left: 14px; }
header nav a:hover, header nav a[aria-current] { color: var(--accent); }
h1 { font-size: 32px; line-height: 1.2; margin: 28px 0 8px; }
h2 { font-size: 22px; margin: 32px 0 6px; }
h3 { font-size: 18px; margin: 22px 0 4px; }
p, li { color: var(--text); }
.lead { font-size: 19px; color: var(--muted); margin-top: 0; }
a { color: var(--accent); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; margin: 18px 0; }
.card h2 { margin-top: 0; }
.muted { color: var(--muted); }
footer { border-top: 1px solid var(--line); margin-top: 48px; padding-top: 16px; padding-bottom: 40px; color: var(--muted); font-size: 15px; }
footer a { color: var(--muted); }