.kwcbem__container {
    height: 0;
    position: relative;
    overflow: hidden;
}

.cssClass img {
    position: absolute;
    height: 100%;
    width: 100%;
    top: 0;
    left: 0;
}

.cssClass .kwcbem__container {
    height: 0;
    position: relative;
    overflow: hidden;
}

.cssClass img {
    position: absolute;
    height: 100%;
    width: 100%;
    top: 0;
    left: 0;
}

Add .cssClass, required if bem (and uniquePrefix) is not used
Add .cssClass, required if bem (and uniquePrefix) is not used
