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

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

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

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

ul.teasersplit>li>a>img {
    display: block;
    width: 100%;
    height: auto;
    transition: transform 0.5s;
    transform: scale(1,1);
}

ul.teasersplit>li>a>div {
    box-sizing: border-box;
    position: absolute;
    height: 50%;
    width: 100%;
    bottom: 0;
    left: 0;
}