:root {
  color-scheme: light dark;
  --fg: #1a1a1a;
  --muted: #666;
  --bg: #fff;
  --accent: #2563eb;
  --code-bg: #f4f4f4;
  --border: #e5e7eb;
}
@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e5e7eb;
    --muted: #9ca3af;
    --bg: #0f172a;
    --accent: #60a5fa;
    --code-bg: #1e293b;
    --border: #334155;
  }
}
html, body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--fg);
  margin: 0;
}
.prose {
  max-width: 720px;
  margin: 2rem auto;
  padding: 1rem;
  line-height: 1.6;
}
h1 { font-size: 1.8rem; margin: 0.5rem 0; }
h2 { font-size: 1.15rem; margin-top: 2rem; }
a { color: var(--accent); }
code {
  background: var(--code-bg);
  padding: 0.1em 0.4em;
  border-radius: 3px;
  font-size: 0.95em;
}
.updated { color: var(--muted); font-size: 0.9rem; margin: 0 0 1.5rem; }
.lang-switch {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding-bottom: 1rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
}
.lang-switch a {
  padding: 0.2rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  text-decoration: none;
}
.lang-switch a.active {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}
ul { padding-left: 1.2rem; }
li { margin: 0.2rem 0; }