:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1d1d1f;
  --muted: #6e6e73;
  --card: #f5f5f7;
  --border: rgba(0,0,0,0.08);
  --accent: #4f46e5;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1c1e;
    --fg: #f5f5f7;
    --muted: #98989d;
    --card: #2c2c2e;
    --border: rgba(255,255,255,0.1);
    --accent: #8b87f5;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 64px 24px 96px; }
.badge {
  width: 56px; height: 56px; border-radius: 14px;
  background: var(--card); border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 28px; margin-bottom: 20px;
}
h1 { font-size: 32px; letter-spacing: -0.02em; margin: 0 0 4px; }
.updated { color: var(--muted); font-size: 14px; margin: 0 0 32px; }
h2 { font-size: 19px; margin: 32px 0 8px; letter-spacing: -0.01em; }
p, li { color: var(--fg); }
.muted { color: var(--muted); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.nav { margin-bottom: 40px; font-size: 14px; }
.nav a { margin-right: 16px; }
ol { padding-left: 20px; }
li { margin-bottom: 8px; }
footer { margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--border); color: var(--muted); font-size: 13px; }