*{box-sizing:border-box;margin:0;font-family:Arial,Helvetica,sans-serif}button{display:block;padding:10px 20px;background-color:#007bff;color:#fff;border:none;border-radius:8px;font-size:1rem;cursor:pointer;transition:background-color .25s ease,transform .2s ease}button:hover{background-color:#0056b3;transform:translateY(-2px)}