body {
    background: url(kaese.jpg);
    background-size: cover;
    margin: 0;
    padding: 0;
    outline: 0;
    border: 0;
}

#countdown, #zaehler {
    position: absolute;
    top: 15px;
    font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
    font-size: 10vh;
    background: white;
    opacity: 0.75;
    border-radius: 10px;
    padding: 5px 20px;
}

#countdown {
    left: 15px;
}

#zaehler {
    right: 15px;
}

#gameover, #start {
    font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
    text-align: center;
    transition: opacity ease-in-out 2s;
}

#gameover {
    visibility: hidden;
    opacity: 0;
}

#gameover h1, #start h1 {
    padding: 5px 20px;
    background: black;
    color: white;
    font-size: 10vh;
    border-radius: 10px;
    letter-spacing: 0.5rem;
}

#gameover button, #start button {
    padding: 5px 8px;
    background: green;
    color: white;
    font-size: 4vh;
    border-radius: 10px;
    border-color: green;
    letter-spacing: 2px;
    text-decoration: none;
}

.container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
    overflow: hidden;
}

.maus {
    position: absolute;
    transition: all ease-in-out 2s;
    visibility: hidden;
    transition-property: left, top;
    left: 0;
    top: 0;
}