body{font-family:Arial,sans-serif;margin:0;background:#f6f6f6}.container{padding:40px}h1{text-align:center}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px;margin-top:30px}.card{background:white;padding:20px;border-radius:12px;box-shadow:0 2px 10px #0000001a}button{margin-top:10px;padding:10px;width:100%;background:black;color:#fff;border:none;border-radius:8px;cursor:pointer}button:hover{background:#333}