:root {
  --bg: #fbfaf7;
  --text: #1f1f22;
  --muted: #6b6b73;
  --accent: #2f6fdf;
  --rule: #e4e2dc;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1f1f20;
    --text: #ececef;
    --muted: #a0a0a8;
    --accent: #7aa7ff;
    --rule: #37373b;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
main { max-width: 720px; margin: 0 auto; padding: 40px 16px 64px; }
h1 { font-size: 1.9rem; line-height: 1.2; margin: 0 0 4px; }
h2 { font-size: 1.1rem; margin: 28px 0 6px; }
p { margin: 0 0 12px; }
.meta { color: var(--muted); font-size: 0.9rem; margin-bottom: 24px; }
.lang { font-size: 0.9rem; margin-bottom: 24px; color: var(--muted); }
a { color: var(--accent); }
hr { border: 0; border-top: 1px solid var(--rule); margin: 48px 0; }
ul { padding-left: 20px; }