body {font-family: sans-serif;margin:0;background:#f2f2f2;}
header {background:#222;color:#fff;padding:20px;text-align:center;}
nav a {color:#0af;margin:0 10px;text-decoration:none;}
.grid {display:grid;grid-template-columns:1fr 1fr;gap:20px;padding:20px;}
.card {background:#fff;padding:20px;border-radius:12px;text-align:center;box-shadow:0 4px 10px rgba(0,0,0,.1);}