.partners-block .partner {
    display:block;
    position:relative;
    padding-bottom:100%;
    overflow: hidden;
}

.partners-block .partner img,
.partners-block .partner .partner-bg-overlay {
    position:absolute;
    display: block;
    top:0;
    left:0;
    right:0;
    bottom:0;
    height: 100%;
    object-fit: cover;
    transition-duration:300ms;
}

.partners-block .partner img.partner-background {
    z-index: 1;
    transform:scale(1.1);
}

.partners-block .partner:hover img.partner-background {
    transform:scale(1);
}

.partners-block .partner .partner-bg-overlay {
    background: var(--wp--preset--color--charcoal);
    opacity: 0.25;
    z-index: 2;
}
    
.partners-block .partner img.partner-logo {
    z-index: 3;
    object-fit: contain;
    transform:scale(0.9);
}

.partners-block .partner:hover img.partner-logo {
    transform:scale(1); 
}