body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;max-width:720px;margin:40px auto;padding:0 20px;line-height:1.6;color:#1f2937}
h1{margin-bottom:4px}nav a{margin-right:16px;color:#4f46e5}footer{margin-top:48px;font-size:14px;color:#6b7280}