#app {
    width: 1000px;
    height: 800px;
    background-image: url("../Bilder/musk1000x800.png");
    /*background-clip: border-box;*/
}

#app svg {
    max-width: 100%;
    height: 100%;
}

#div_changeState {
    width: 100px;
    padding: 10px;
    background: aliceblue;
    text-align: center;
    box-shadow: 0 0 10px black;
    cursor: pointer;
    position: absolute;
    left: 450px;
}

#div_changeState:active {
    background: #cccccc;
}