/* author: https://codepen.io/fleemaja/pen/BMbrqN */
html, body {
    font-family: sans-serif;
    margin: 0;
    padding: 0;
    overflow: hidden;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

canvas {
    display: block !important;
    margin: 0 auto !important;
    max-width: 100% !important;
    height: auto !important;
}