:root { --text: #1f2933; --muted: #52606d; --accent: #2f855a; --bg: #ffffff; --line: #e4e7eb; }
@media (prefers-color-scheme: dark) {
  :root { --text: #e4e7eb; --muted: #9aa5b1; --accent: #68d391; --bg: #1a202c; --line: #2d3748; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
main { max-width: 760px; margin: 0 auto; padding: 32px 16px 64px; }
h1 { font-size: 1.9rem; line-height: 1.25; margin: 0 0 4px; }
h2 { font-size: 1.3rem; margin: 40px 0 8px; padding-top: 16px; border-top: 1px solid var(--line); }
h3 { font-size: 1.05rem; margin: 24px 0 4px; }
a { color: var(--accent); }
.meta, footer { color: var(--muted); font-size: 0.9rem; }
nav { display: flex; flex-wrap: wrap; gap: 16px; margin: 16px 0 24px; font-size: 0.95rem; }
footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--line); }