* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: #000;
}

#gameCanvas {
    display: block;
    margin: auto;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    /* Critical for pixel art: no smoothing */
    image-rendering: pixelated;
    image-rendering: crisp-edges;
    -ms-interpolation-mode: nearest-neighbor;
}