:root {
  --bg: #fff;
  --fg: #111;
  --muted: #666;
  --border: #ddd;
  --link: #0055aa;
  --code-bg: #f5f5f5;
  --max-w:720px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1a1a1a;
    --fg: #e0e0e0;
    --muted: #999;
    --border: #333;
    --link: #6db3f2;
    --code-bg: #252525;
  }
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--fg);
  background: var(--bg);
  padding: 2rem 1rem;
  max-width: var(--max-w);
  margin: 0 auto;
}

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

header { margin-bottom: 2rem; }
header h1 { font-size: 1.3rem; }
header h1 a { text-decoration: none; color: var(--fg); }
header nav { margin-top: 0.3rem; font-size: 0.9rem; }
header nav a { margin-right: 1rem; }

article h1 { font-size: 1.6rem; margin-bottom: 0.3rem; }
article .meta { color: var(--muted); font-size: 0.9rem; margin-bottom: 1.5rem; }
article h2 { font-size: 1.3rem; margin-top: 1.8rem; margin-bottom: 0.5rem; }
article h3 { font-size: 1.1rem; margin-top: 1.4rem; margin-bottom: 0.4rem; }
article p { margin-bottom: 1rem; }
article ul, article ol { margin-bottom: 1rem; padding-left: 1.5rem; }
article img { max-width: 100%; height: auto; }
article blockquote {
  border-left: 3px solid var(--border);
  padding-left: 1rem;
  color: var(--muted);
  margin-bottom: 1rem;
}

pre {
  background: var(--code-bg);
  padding: 1rem;
  overflow-x: auto;
  margin-bottom: 1rem;
  border-radius: 4px;
  font-size: 0.9rem;
}

code { font-family: "SF Mono", Menlo, Consolas, monospace; font-size: 0.9em; }
p code, li code { background: var(--code-bg); padding: 0.15em 0.35em; border-radius: 3px; }

.post-list { list-style: none; }
.post-list li { margin-bottom: 0.8rem; }
.post-list .date { color: var(--muted); font-size: 0.9rem; margin-right: 0.5rem; }

footer { margin-top: 3rem; padding-top: 1rem; border-top: 1px solid var(--border); font-size: 0.85rem; color: var(--muted); }