:root {
  color-scheme: light dark;
  --bg: #eef4fc;
  --card: #ffffff;
  --ink: #0b1526;
  --ink-secondary: #44506a;
  --accent: #1f6feb;
  --stroke: rgba(31, 111, 235, 0.14);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #050a16;
    --card: #0d1526;
    --ink: #eef4fc;
    --ink-secondary: #9aa8c2;
    --accent: #3d8bff;
    --stroke: rgba(61, 139, 255, 0.18);
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}
main {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 24px 72px;
}
header.site {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 40px;
}
header.site .brand {
  font-weight: 700;
  letter-spacing: 0.35em;
  font-size: 15px;
  color: var(--accent);
  text-decoration: none;
}
header.site nav { margin-left: auto; display: flex; gap: 18px; }
header.site nav a {
  color: var(--ink-secondary);
  text-decoration: none;
  font-size: 14px;
}
header.site nav a:hover { color: var(--accent); }
h1 { font-size: 30px; line-height: 1.25; margin: 0 0 6px; }
.updated { color: var(--ink-secondary); font-size: 14px; margin: 0 0 32px; }
h2 { font-size: 20px; margin: 36px 0 10px; }
p, li { color: var(--ink); }
li { margin: 6px 0; }
a { color: var(--accent); }
.card {
  background: var(--card);
  border: 1px solid var(--stroke);
  border-radius: 20px;
  padding: 18px 22px;
  margin: 24px 0;
}
.card p { margin: 0; color: var(--ink-secondary); font-size: 15px; }
footer {
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--stroke);
  color: var(--ink-secondary);
  font-size: 14px;
}
footer a { color: var(--ink-secondary); }