body {
    @keyframes flash-color {
        0% { color: red; }
        50% { color: black; }
        100% { color: red; }
    }

    #stop_the_panik {
        font-size: large;
        animation: flash-color 500ms infinite;
        text-shadow: darkgrey;
    }

    #panik {
        font-size: xx-large;
        animation: flash-color 100ms infinite;
    }

    .pagenumber {
        position: absolute;
        bottom: 20px;
        right: 30px;
        font-size: 12px;
        color: darkgrey;
    }
}