html, body, * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html, body {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}
body {
    padding: 1rem;
    background-color: rgb(255, 255, 255);
}
body canvas {
    width: 100% !important;
    height: 100% !important;
    object-fit: contain;
}