body{font-family:Roboto,sans-serif;color:#333;background-color:#f4f4f4;margin:0;padding:0}.container{display:grid;grid-template-columns:repeat(auto-fill,minmax(600px,1fr));grid-gap:20px;gap:20px;padding:20px}.button{background-color:#007bff;color:#ffffff;border:none;padding:10px 20px;border-radius:5px;cursor:pointer;transition:background-color .3s ease}.button:hover{background-color:#0056b3}.card{background-color:#ffffff;box-shadow:0 2px 4px rgba(0,0,0,.1);border-radius:8px;padding:20px;text-align:center}