body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  color: #222;
  max-width: 44rem;
  margin: 2rem auto;
  padding: 0 1rem;
}

h1 { font-size: 1.8rem; margin-bottom: 0.25rem; }
h2 { font-size: 1.2rem; margin-top: 2rem; }

.updated { color: #666; margin-top: 0; }

nav { margin-bottom: 2rem; }
nav a { margin-right: 1rem; }

footer {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid #ddd;
  color: #666;
  font-size: 0.9rem;
}