body{max-width:50%;margin:0 auto;font-family:Inter,Arial,sans-serif}canvas{margin-bottom:50px}div{text-align:center}button{color:#fff;background-color:#007bff;border:1px solid #007bff;font-size:1rem;line-height:1.5;border-radius:.25rem;cursor:pointer;padding:10px;margin:0 20px}button:hover{background-color:#0069d9}