body {
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    object-fit: scale-down;
    margin: 0;
}

canvas {
    margin: 0;
    max-width: 100%;
    max-height: 100%;

    overflow: auto;
    position: inherit;
    object-fit: scale-down;
}