html, body {
    margin: 0;
    padding: 0;
    width: 100% !important;
    height: 100% !important;
    overflow: hidden;
    background-color: #111111 !important;
}

canvas {
    display: block !important;
    width: 100vw !important;  
    height: 100vh !important; 
    position: absolute !important;
    top: 0 !important;
    left: 0 !important;
}