body { font-family: system-ui, -apple-system, sans-serif; max-width: 800px; margin: 0 auto; padding: 2rem; }
h1 { color: #333; }
.structure { background: #f5f5f5; padding: 1rem; border-radius: 8px; font-family: monospace; }
.structure a { color: #0066cc; text-decoration: none; }
.structure a:hover { text-decoration: underline; }
ul { list-style: none; padding-left: 1.5rem; }
li::before { content: ""; }