body, canvas, div {
    margin: 0;
    padding: 0;
    -moz-user-select: none;
    -webkit-user-select: none;
    -ms-user-select: none;
    -khtml-user-select: none;
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}

body {
    background-color: #111;
}

canvas {
    margin: 0 auto;
}