:root {
  --bg: #fafafa;
  --fg: #1a1a1a;
  --muted: #666;
  --link: #2563eb;
  --border: #e5e5e5;
}
* { box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  background: var(--bg); color: var(--fg);
  max-width: 720px; margin: 0 auto; padding: 2rem 1rem;
  line-height: 1.6;
}
header { border-bottom: 1px solid var(--border); padding-bottom: 1rem; margin-bottom: 2rem; }
header h1 { font-size: 1.5rem; margin: 0; }
header h1 a { color: var(--fg); text-decoration: none; }
nav { margin-top: 0.5rem; }
nav a { margin-right: 1rem; color: var(--link); text-decoration: none; }
nav a:hover { text-decoration: underline; }
.intro { color: var(--muted); margin-bottom: 2rem; }
article { margin-bottom: 2rem; padding-bottom: 1.5rem; border-bottom: 1px solid var(--border); }
article h3 { margin: 0 0 0.25rem; font-size: 1.15rem; }
article h3 a { color: var(--link); text-decoration: none; }
article time { color: var(--muted); font-size: 0.85rem; }
article p { margin: 0.5rem 0 0; color: var(--muted); }
footer { margin-top: 3rem; padding-top: 1rem; border-top: 1px solid var(--border); color: var(--muted); font-size: 0.85rem; }
a { color: var(--link); }
pre { background: #f4f4f4; padding: 1rem; overflow-x: auto; border-radius: 4px; }
code { background: #f4f4f4; padding: 0.1rem 0.3rem; border-radius: 3px; font-size: 0.9em; }
.archive { list-style: none; padding: 0; }
.archive li { padding: 0.5rem 0; border-bottom: 1px solid var(--border); }
.archive time { color: var(--muted); margin-right: 0.75rem; font-family: monospace; }