:root {
  --bg: #fafafa;
  --text: #1a1a1a;
  --muted: #666;
  --accent: #2563eb;
  --border: #e5e5e5;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111;
    --text: #eaeaea;
    --muted: #999;
    --accent: #60a5fa;
    --border: #2a2a2a;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.6;
}
main { max-width: 720px; margin: 0 auto; padding: 64px 20px; }
h1 { font-size: 2rem; margin: 0; }
h2 { font-size: 1.1rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); margin-top: 48px; }
h3 { margin: 0 0 4px; font-size: 1.1rem; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.tagline { color: var(--muted); margin: 4px 0 16px; }
nav a { margin-right: 16px; }
article { padding: 16px 0; border-bottom: 1px solid var(--border); }
article:last-child { border-bottom: none; }
article p { margin: 4px 0; }
.tags { font-size: 0.85rem; color: var(--muted); }
footer { margin-top: 64px; font-size: 0.85rem; color: var(--muted); }