body{margin:0;font-family:system-ui,sans-serif;line-height:1.6;color:#111;background:#fff}
main{max-width:48rem;margin:0 auto;padding:2.5rem 1rem}
nav a{margin-inline-end:1rem}
h1{font-size:2rem}
h2{font-size:1.35rem;margin-top:2rem}
footer{margin-top:3rem;padding-top:1rem;border-top:1px solid #ddd;color:#555;font-size:.9rem}
@media print{nav{display:none}}