:root {
  --bg: #ffffff;
  --fg: #1a1d21;
  --muted: #5c6470;
  --accent: #0f766e;
  --card: #f4f6f8;
  --border: #e2e6ea;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101315;
    --fg: #e8eaed;
    --muted: #9aa3ad;
    --accent: #2dd4bf;
    --card: #1a1f23;
    --border: #2a3138;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.65;
}
main { max-width: 720px; margin: 0 auto; padding: 3rem 1.5rem 5rem; }
header.site { padding: 1.25rem 1.5rem; border-bottom: 1px solid var(--border); }
header.site a { color: var(--fg); text-decoration: none; font-weight: 700; font-size: 1.05rem; }
header.site a span { color: var(--accent); }
h1 { font-size: 1.9rem; margin: 0 0 .25rem; }
h2 { font-size: 1.15rem; margin: 2.2rem 0 .6rem; }
p.lede { color: var(--muted); margin-top: 0; }
a { color: var(--accent); }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.1rem 1.3rem;
  margin: 1rem 0;
}
.card h3 { margin: 0 0 .3rem; font-size: 1rem; }
.card p { margin: 0; color: var(--muted); }
footer { color: var(--muted); font-size: .85rem; text-align: center; padding: 2rem 1rem; border-top: 1px solid var(--border); }
ul { padding-left: 1.2rem; }
li { margin: .35rem 0; }
.updated { color: var(--muted); font-size: .85rem; }