body {
    padding: 0;
    margin: 0;
}

canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    mix-blend-mode: difference;
    filter: brightness(50%);
}

.bg_canvas {
    position:absolute;
    top:0;
    left:0;
    right:0;
    bottom:0;
    background:#3c3b2d;
    filter: brightness(350%);
}