body {
  margin: 0;
  padding: 48px 20px;
  background: #0d0d0d;
  color: #eee;
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 720px; margin: 0 auto; }
h1 { color: #ffd700; font-size: 2.2rem; letter-spacing: 0.02em; margin-bottom: 0.2em; }
h2 { color: #ffd700; font-size: 1.2rem; margin-top: 2em; }
a { color: #ffd700; }
nav { margin-top: 3em; padding-top: 1em; border-top: 1px solid #333; font-size: 0.95rem; }
nav a { margin-right: 1.2em; }
.muted { color: #999; }