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

body {
    position: relative;
    background: #3b7ae2;
}

#canvas {
    display: block;
}

body::after {
    z-index: 10;
    position: absolute;
    display: block;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    content: '';
    background-image: radial-gradient(rgba(177, 133, 187, 0) 10%, rgba(2, 2, 3, 0.7) 100%);
}