:root {
  --ink: #2f3a2a;
  --muted: #6b7564;
  --paper: #fbf7ee;
  --leaf: #4f8a3c;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e8e4d8;
    --muted: #a9b0a0;
    --paper: #1d221a;
    --leaf: #8cc474;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 720px; margin: 0 auto; padding: 32px 16px 64px; }
h1 { font-size: 2rem; margin: 0 0 4px; }
h2 { margin-top: 2em; font-size: 1.3rem; }
h3 { margin-top: 1.5em; font-size: 1.05rem; }
.meta { color: var(--muted); margin-top: 0; }
a { color: var(--leaf); }
code { font-size: 0.9em; }