canvas {display: block;margin: 50px auto;box-shadow: -2px -2px 2px #efefef, 5px 5px 5px #b9b9b9;cursor: pointer;}.btn-wrap {display: flex;flex-direction: row;justify-content:center;}.btn-wrap div {margin: 0 10px;}div>span {display: inline-block;padding: 10px 20px;color: #fff;background-color: #EE82EE;border-radius: 5px;cursor: pointer;}div.unable span { background: #D6D6D4; color: #adacaa;}#result-wrap {text-align: center;}