:root {
  --ink: #1a1a1a;
  --muted: #5a5a5a;
  --bg: #ffffff;
  --accent: #2563eb;
  --border: #e5e5e5;
  --max-w: 760px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
}
.site-header, .site-footer, main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 1.25rem 1rem;
}
.site-header { display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid var(--border); }
.brand { font-weight: 700; text-decoration: none; color: var(--ink); }
nav a { margin-left: 1rem; color: var(--muted); text-decoration: none; font-size: 0.95rem; }
nav a:hover { color: var(--accent); }
h1 { font-size: 1.9rem; line-height: 1.25; }
a { color: var(--accent); }
.post-list { list-style: none; padding: 0; }
.post-list li { padding: 1rem 0; border-bottom: 1px solid var(--border); }
.post-list a { font-size: 1.15rem; font-weight: 600; text-decoration: none; }
.post-meta { color: var(--muted); font-size: 0.9rem; }
pre { background: #f5f5f5; padding: 1rem; overflow-x: auto; border-radius: 6px; }
code { background: #f5f5f5; padding: 0.15rem 0.35rem; border-radius: 4px; font-size: 0.92em; }
pre code { background: none; padding: 0; }
.site-footer { color: var(--muted); font-size: 0.85rem; border-top: 1px solid var(--border); margin-top: 2rem; }