body {font-family: Arial; margin:0;}
header {background:#111;color:#fff;padding:15px;}
.nav {display:flex;justify-content:space-between;}
nav a {color:#fff;margin-left:15px;text-decoration:none;}
.hero {background:#333;color:#fff;text-align:center;padding:80px;}
.section {padding:50px;text-align:center;}
.light {background:#f4f4f4;}
.grid {display:flex;gap:20px;justify-content:center;}
.card {background:#fff;padding:20px;box-shadow:0 0 5px #ccc;}
footer {background:#111;color:#fff;text-align:center;padding:10px;}