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

canvas {
    height: 100%;
    width: 100%;
    background: black;
}

#hint {
    position: absolute;
    color: white;
    left: 0;
    right: 0;
    top: 30%;
    text-align: center;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    -khtml-user-select: none;
    -o-user-select: none;
    font-size: 2em;
    display: inline-block;
    margin: 0;
    padding: 0;
}