body{font-family:Arial;margin:0;background:#f5f5f5;color:#222;}
header{background:#fff;padding:20px;text-align:center;border-bottom:1px solid #ddd;}
nav{text-align:center;background:#222;padding:10px;}
nav a{color:white;margin:10px;text-decoration:none;font-weight:bold;}
.container{max-width:1200px;margin:20px auto;padding:10px;}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;}
.card{background:white;border-radius:6px;overflow:hidden;box-shadow:0 0 4px #ccc;}
.card img{width:100%;height:auto;}
.card h3{padding:10px;}
footer{text-align:center;background:#222;color:white;padding:20px;margin-top:40px;}