* { box-sizing: border-box; }
body {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  line-height: 1.6;
  color: #0a0a0a;
  background: #f8f8f8;
  margin: 0;
  padding: 0;
}
header {
  background: #0a0a0a;
  color: #fff;
  padding: 1.25rem 1.5rem;
}
header a { color: #fff; text-decoration: none; font-weight: 600; }
main {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
  background: #fff;
  min-height: 60vh;
}
footer {
  text-align: center;
  padding: 1.5rem;
  font-size: 0.875rem;
  color: #666;
}
footer a { color: #0a0a0a; }
h1 { font-size: 1.5rem; margin-top: 0; }
h2 { font-size: 1.1rem; margin-top: 1.75rem; }
.meta { color: #666; font-size: 0.9rem; }
.nav { margin-top: 0.5rem; font-size: 0.9rem; }
.nav a { color: #ccc; margin-right: 1rem; }