:root {
  --bg: #fff;
  --fg: #222;
  --muted: #666;
  --border: #ddd;
  --link: #0057b7;
  --max-width: 640px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1a1a1a;
    --fg: #ddd;
    --muted: #999;
    --border: #444;
    --link: #6cb4ee;
  }
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  color: var(--fg);
  background: var(--bg);
  line-height: 1.6;
  padding: 0 1rem;
}

header {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem 0 1rem;
  border-bottom: 1px solid var(--border);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.site-title {
  font-size: 1.2rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--fg);
}

.nav-links a {
  margin-left: 1rem;
  text-decoration: none;
  color: var(--muted);
}

.nav-links a:hover { color: var(--fg); }

main {
  max-width: var(--max-width);
  margin: 2rem auto;
}

h1 { font-size: 1.5rem; margin-bottom: 0.5rem; }
h2 { font-size: 1.2rem; margin: 1.5rem 0 0.5rem; }

a { color: var(--link); }

p, ul, ol, pre, blockquote { margin-bottom: 1rem; }

.post-meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.post-list {
  list-style: none;
}

.post-list li {
  padding: 0.4rem 0;
}

.post-date {
  color: var(--muted);
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
  margin-right: 0.75rem;
}

.tag-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag-list a {
  display: inline-block;
  padding: 0.3rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  text-decoration: none;
  color: var(--fg);
  font-size: 0.9rem;
}

.tag-list a:hover {
  border-color: var(--link);
  color: var(--link);
}

pre {
  background: var(--border);
  padding: 1rem;
  border-radius: 4px;
  overflow-x: auto;
}

code { font-size: 0.9em; }

blockquote {
  border-left: 3px solid var(--border);
  padding-left: 1rem;
  color: var(--muted);
}

footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 0;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.85rem;
}

img { max-width: 100%; height: auto; }