:root {
  --bg: #ffffff;
  --fg: #1c1c1e;
  --muted: #6e6e73;
  --accent: #0071e3;
  --border: #e5e5ea;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1c1e;
    --fg: #f5f5f7;
    --muted: #98989d;
    --accent: #409cff;
    --border: #38383a;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
}
main {
  max-width: 680px;
  margin: 0 auto;
  padding: 56px 20px 80px;
}
h1 { font-size: 30px; margin: 0 0 6px; }
h2 { font-size: 20px; margin: 36px 0 8px; }
p { margin: 0 0 14px; }
.updated { color: var(--muted); font-size: 14px; margin-bottom: 32px; }
a { color: var(--accent); }
nav { margin-bottom: 40px; }
nav a { margin-right: 16px; text-decoration: none; font-weight: 600; }
.q { font-weight: 600; margin: 20px 0 4px; }
.a { color: var(--muted); margin: 0 0 4px; }
footer { margin-top: 48px; color: var(--muted); font-size: 14px; }