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

body {
    background: radial-gradient(ellipse at bottom, #090a18 0%, #050510 50%, #000000 100%);
}

#canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
}

body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, transparent 30%, rgba(0,0,0,0.5) 100%);
    pointer-events: none;
    z-index: 0;
}