body {
    margin: 0;
    background-color: #292d3e;
}
.app {
    position: absolute;
    top: 0px;
    left: 0px;
    margin: 0px;
    border: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    display: block;
    image-rendering: optimizeSpeed;
    image-rendering: -moz-crisp-edges;
    image-rendering: -o-crisp-edges;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: optimize-contrast;
    image-rendering: crisp-edges;
    image-rendering: pixelated;
    -ms-interpolation-mode: nearest-neighbor;
}
.app:-webkit-full-screen {
    width: 100%;
    height: 100%;
}