:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1c1c1e;
  --muted: #6e6e73;
  --accent: #5e5ce6;
  --card: #f5f5f7;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #1c1c1e; --fg: #f5f5f7; --muted: #98989d; --card: #2c2c2e; }
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 24px 64px;
}
header { margin-bottom: 40px; }
header .brand {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
}
h1 { font-size: 2rem; margin: 12px 0 4px; }
.updated { color: var(--muted); font-size: 0.9rem; }
h2 { font-size: 1.2rem; margin: 32px 0 8px; }
p { margin-bottom: 12px; }
.lang-divider {
  margin: 48px 0 32px;
  border: none;
  border-top: 1px solid var(--card);
}
.card {
  background: var(--card);
  border-radius: 14px;
  padding: 20px 24px;
  margin: 24px 0;
}
a { color: var(--accent); }
nav { margin-top: 48px; font-size: 0.9rem; color: var(--muted); }
nav a { margin-right: 16px; }