:root {
  --fg: #1a1a1a;
  --bg: #fafafa;
  --muted: #666;
  --accent: #b7410e; /* rust */
}
@media (prefers-color-scheme: dark) {
  :root { --fg: #e6e6e6; --bg: #111; --muted: #999; }
}

html { font: 16px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif; }
body {
  color: var(--fg);
  background: var(--bg);
  max-width: 38rem;
  margin: 2rem auto;
  padding: 0 1rem;
}
a { color: var(--accent); }
header nav a { margin-right: 1rem; }
footer { margin-top: 3rem; color: var(--muted); font-size: 0.9rem; }
pre, code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
pre { padding: 0.75rem; overflow-x: auto; border-radius: 4px; }
img { max-width: 100%; height: auto; }