html, body {
    width: 100%;
    height: 100%;
    margin: 0;
}

body {
    overflow: hidden;
    object-fit: contain;
    background-color: #212121;
}
  
main {
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 0px;
}
  
canvas {
    max-width: 95%;
    max-height: 95%;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: auto;
    overflow: auto;
    position: fixed;
    object-fit: contain;
    z-index: 1;
    filter: drop-shadow(0 0 1.0rem rgba(37, 37, 37, 0.8));
}