*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--bg:#fafafa;--fg:#111;--muted:#666;--border:#e5e5e5;--accent:#2563eb;--accent-hover:#1d4ed8;--radius:8px;--max-w:720px}body{color:var(--fg);background:var(--bg);-webkit-font-smoothing:antialiased;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,sans-serif;line-height:1.6}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}