body,
html {
    margin: 0;
    padding: 0;
    overflow: hidden;
    position: relative;
}

canvas {
    display: block;
}

code {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    margin: 20px auto;
    padding: 10px;
    background-color: #f4f4f4;
    border: 1px solid #ddd;
    border-radius: 5px;
    max-width: 80%;
    overflow-x: auto;
}