:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #666666;
  --accent: #2563eb;
  --border: #e5e5e5;
  --code-bg: #f4f4f5;
  --tag-bg: #eef2ff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121212;
    --fg: #e8e8e8;
    --muted: #9a9a9a;
    --accent: #6ea8ff;
    --border: #2a2a2a;
    --code-bg: #1e1e1e;
    --tag-bg: #1e2a4a;
  }
}

* { box-sizing: border-box; }

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

.site-header {
  max-width: 720px;
  margin: 0 auto;
  padding: 2.5rem 1rem 1rem;
}

.site-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--fg);
  text-decoration: none;
}

.site-tagline {
  color: var(--muted);
  margin: 0.25rem 0 0;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 1rem;
}

.post-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.post-list-item {
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--border);
}

.post-list-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--fg);
  text-decoration: none;
}

.post-list-title:hover { color: var(--accent); }

.post-list-meta, .post-meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0.25rem 0 0.5rem;
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  align-items: center;
}

.post-list-summary { color: var(--muted); margin: 0; }

.tag {
  background: var(--tag-bg);
  color: var(--accent);
  padding: 0.1rem 0.5rem;
  border-radius: 999px;
  font-size: 0.8rem;
}

article.post h1 { margin-bottom: 0.25rem; }

.post-body h2 { margin-top: 2rem; }
.post-body p { margin: 1rem 0; }
.post-body pre {
  background: var(--code-bg);
  padding: 1rem;
  overflow-x: auto;
  border-radius: 6px;
}
.post-body code {
  background: var(--code-bg);
  padding: 0.1rem 0.3rem;
  border-radius: 4px;
  font-size: 0.9em;
}
.post-body pre code { background: none; padding: 0; }
.post-body table {
  border-collapse: collapse;
  width: 100%;
}
.post-body th, .post-body td {
  border: 1px solid var(--border);
  padding: 0.4rem 0.6rem;
  text-align: left;
}
.post-body a { color: var(--accent); }

.site-footer {
  max-width: 720px;
  margin: 2rem auto 0;
  padding: 1rem;
  color: var(--muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
}