:root {
  color-scheme: light dark;
  --bg: #fdfcfa;
  --fg: #1c2333;
  --muted: #5b647a;
  --accent: #5a5fd6;
  --card: #f2f1fb;
  --border: #e3e2ef;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1220;
    --fg: #e8eaf2;
    --muted: #9aa2b8;
    --accent: #9ba0ff;
    --card: #181d31;
    --border: #262c44;
  }
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
main {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}
header.site {
  display: flex;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
header.site .brand {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--fg);
  text-decoration: none;
}
header.site nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
  margin-right: 14px;
}
header.site nav a:hover { color: var(--accent); }
h1 { font-size: 1.9rem; line-height: 1.25; margin-bottom: 6px; }
.updated { color: var(--muted); font-size: 0.9rem; margin-bottom: 32px; }
h2 { font-size: 1.25rem; margin: 36px 0 10px; }
h3 { font-size: 1.05rem; margin: 24px 0 8px; }
p { margin: 12px 0; }
ul { margin: 12px 0 12px 22px; }
li { margin: 6px 0; }
a { color: var(--accent); }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 20px;
  margin: 20px 0;
}
footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px 48px;
  color: var(--muted);
  font-size: 0.85rem;
}
.home-links { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 28px; }
.home-links a {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 22px;
  text-decoration: none;
  font-weight: 600;
}