:root {
  --bg: #f7f5f0;
  --fg: #1d2326;
  --muted: #5b6468;
  --accent: #1f4e5f;
  --rule: #ddd8cc;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #14191b; --fg: #e8e6e1; --muted: #9aa3a6; --accent: #8cc2d4; --rule: #2a3236; }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.6 Georgia, "Iowan Old Style", "Palatino Linotype", serif;
}
main, header, footer { max-width: 40rem; margin: 0 auto; padding: 0 1rem; }
header { padding-top: 3rem; }
.mark { font: 600 1.1rem/1 system-ui, sans-serif; letter-spacing: .04em; color: var(--accent); text-decoration: none; }
h1 { font-size: 2.2rem; line-height: 1.2; margin: 2.5rem 0 1rem; font-weight: 500; }
h2 { font: 600 1rem/1.3 system-ui, sans-serif; margin: 2rem 0 .5rem; }
p, li { color: var(--fg); }
.lede { font-size: 1.2rem; color: var(--muted); }
a { color: var(--accent); }
footer { margin-top: 4rem; padding-bottom: 2rem; border-top: 1px solid var(--rule); font: .85rem/1.6 system-ui, sans-serif; color: var(--muted); }
footer nav a { margin-right: 1rem; }