ul.teaserpictureedge {
    padding: 0;
    margin: 0;
}

@media (min-width: 768px) {
    ul.teaserpictureedge {
        display: flex;
        flex-wrap: wrap;
        justify-content: flex-start;
        align-items: stretch;
    }
}

ul.teaserpictureedge>li {
    display: block;
    padding: 0;
    margin: 0;
    list-style: none;
}

ul.teaserpictureedge>li>a {
    display: block;
    position: relative;
    width: 100%;
    height: 0;
    overflow: hidden;
}
ul.teaserpictureedge>li>a>img {
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transition: transform 0.5s;
}

ul.teaserpictureedge>li>a:focus-visible>img
{
    filter: brightness(50%) contrast(75%);
}

ul.teaserpictureedge>li>a>span {
    display: block;
    position: absolute;
}