body{font-family:Arial;background:#f5f5f5;margin:0}
header{background:#fff;padding:20px;text-align:center}
nav a{margin:10px}
.products{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:20px}
.card{background:#fff;padding:10px;text-align:center}
.card img{width:100%;height:150px;object-fit:contain}