:root {
  color-scheme: light dark;
  --fg: #1d1d1f;
  --muted: #5f6368;
  --bg: #ffffff;
  --accent: #2a6f4e;
  --border: #e3e3e3;
  --code-bg: #f2f2f2;
}

@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e8e8e8;
    --muted: #a0a0a0;
    --bg: #141414;
    --accent: #6cc59a;
    --border: #2c2c2c;
    --code-bg: #232323;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

main { max-width: 42rem; margin: 0 auto; padding: 3rem 1rem 4rem; }
h1 { font-size: 1.6rem; line-height: 1.25; margin: 0 0 0.5rem; }
h2 { font-size: 1.1rem; margin: 2rem 0 0.5rem; }
.meta { color: var(--muted); font-size: 0.9rem; margin: 0 0 2rem; }
a { color: var(--accent); }
code { font: 0.9em ui-monospace, SFMono-Regular, Menlo, monospace; background: var(--code-bg); padding: 0.1em 0.35em; border-radius: 4px; }
footer { margin-top: 3rem; padding-top: 1rem; border-top: 1px solid var(--border); color: var(--muted); font-size: 0.9rem; }
footer a { margin-right: 1rem; }