body {font-family: Arial, sans-serif; margin:0; padding:0; background:#f5f5f5;}
header {background:#111; color:white; padding:40px; text-align:center;}
section {padding:40px; background:white; margin:20px;}
.gallery {display:flex; gap:10px; flex-wrap:wrap;}
.gallery img {width:30%; border-radius:10px;}
footer {background:#111; color:white; text-align:center; padding:20px;}