:root {
  color-scheme: light dark;
  --fg: #1b1f23;
  --bg: #fbfbfc;
  --muted: #6a737d;
  --accent: #3a6ea5;
  --border: #e1e4e8;
}

* { box-sizing: border-box; }

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

header {
  border-bottom: 1px solid var(--border);
  padding: 1.25rem 1.5rem;
}

nav a {
  margin-right: 1.25rem;
  color: var(--fg);
  text-decoration: none;
  font-size: 0.95rem;
}

nav a:hover { color: var(--accent); }

main {
  max-width: 42rem;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

h1 { font-size: 1.6rem; margin-bottom: 0.25rem; }
h2 { font-size: 1.15rem; margin-top: 2rem; }

.meta {
  color: var(--muted);
  font-size: 0.85rem;
  margin-bottom: 2rem;
}

.post {
  padding-bottom: 1.5rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.post:last-child { border-bottom: none; }

.post time {
  color: var(--muted);
  font-size: 0.8rem;
}

footer {
  max-width: 42rem;
  margin: 0 auto;
  padding: 1.5rem;
  color: var(--muted);
  font-size: 0.8rem;
}

code {
  background: rgba(0,0,0,0.05);
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
  font-size: 0.9em;
}