.ratio16-9 {
    position: relative;
    width: 100%;
    padding-top: 75% !important;
    background-size: cover !important;
    background-repeat: no-repeat !important;
    background-position: center !important;
}

.ratio1-1 {
    position: relative;
    width: 100%;
    padding-top: 100% !important;
    background-size: cover !important;
    background-repeat: no-repeat !important;
    background-position: center !important;
}