:root { color-scheme: light dark; }
body {
  font-family: system-ui, -apple-system, Segoe UI, sans-serif;
  line-height: 1.55;
  max-width: 42rem;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}
h1 { font-size: 1.6rem; }
h2 { font-size: 1.15rem; margin-top: 1.75rem; }
nav { margin: 1.25rem 0 0; font-size: 0.95rem; }
a { color: #5b4b8a; }
ul { padding-left: 1.2rem; }
.meta { color: #666; }