a.modal-back-button {

    display: none;

    width: 100px;

    height: 100px;

    background-image: url('Symbole/Pfeil_links_leer.png');

    background-size: contain;

    background-repeat: no-repeat;

    text-decoration: none;

    position: fixed;

    top: 8%;

    left: 4%;

    z-index: 1001;

    cursor: pointer;

    padding: 1px;

}

/* Hover-Effekt für das Symbol: Pfeil ändert sich zu Pfeil_rechts.png */

a.modal-back-button:hover {

    background-image: url('Symbole/Pfeil_links2.png');

}



a.modal-back-button:active {

    transform: scale(0.9); /* Symbol wird kleiner */

}