html,
    body,
    .game
    {
        height: 100%;
        width: 100%;
        margin: 0px;
    }
    html {
        background-image: url(bg.jpg);
        background-size: cover;
        background-attachment: fixed;
    }
    .frage
    {
        position: absolute;
        width: 33%;
        height: 33%;
        top: 33%;
        left: 33%;
        background-color: #555555;
        text-align: center;
        z-index: 999;
    }
    .answer
    {
        position: relative;
        width: 50%;
        height: 50%;
        float: left;
        text-align: center;
    }
    .answer-inner
    {
        position: absolute;
        width: 33%;
        height: 33%;
        top: 33%;
        left: 33%;
    }
    .answer-1
    {
        background-color: #666666;
    }
    .answer-2
    {
        background-color: #777777;
    }
    .answer-3
    {
        background-color: #888888;
    }
    .answer-4
    {
        background-color: #999999;
    }