main .headerbild {
    float:none;
    width: 980px;
    height: 522px;
}

@media only screen and (min-width: 681px) and (max-width: 1020px) {
    main .headerbild {
        float: none;
        width: var(--width-tablet);
        height: 345px;
        margin-bottom: 22px;
    }
}

@media only screen and (max-width: 680px) {
    main .headerbild {
        float: none;
        width: 100%;
        height: auto;
        margin-bottom: 2px;
    }
}