:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #16161a;
  --muted: #5d5d66;
  --rule: #e4e4e8;
  --card: #f5f5f7;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0b0b0c; --fg: #f2f2f3; --muted: #a1a1a6; --rule: #26262b; --card: #151518; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
}
main { max-width: 720px; margin: 0 auto; padding: 32px 16px 80px; }
nav { display: flex; gap: 20px; flex-wrap: wrap; font-size: 15px; margin-bottom: 40px; }
nav a { color: var(--muted); text-decoration: none; }
nav a:first-child { color: var(--fg); font-weight: 700; }
h1 { font-size: 34px; line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 6px; }
.updated { color: var(--muted); font-size: 15px; margin: 0 0 32px; }
h2 { font-size: 21px; margin: 40px 0 8px; padding-top: 24px; border-top: 1px solid var(--rule); }
h3 { font-size: 17px; margin: 24px 0 4px; }
p, li { margin: 0 0 12px; }
ul { padding-left: 22px; }
a { color: inherit; }
.short { background: var(--card); border-radius: 14px; padding: 18px 20px 6px; margin-bottom: 8px; }
.short li { margin-bottom: 10px; }
footer { margin-top: 56px; color: var(--muted); font-size: 14px; }