body, html {
    padding: 0;
    margin: 0;
    overflow: hidden;
    background: #97a1a1;
}

#canvas {
    padding: 0;
    margin: 0;
    position: absolute;
}

/* * { background-color: rgba(255, 0, 0, 0.1); } */
/* * * { background-color: rgba(0, 255, 0, 0.2); } */
/* * * * { background-color: rgba(0, 0, 255, 0.3); } */