.section-gallery-conteiner {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    grid-gap: 40px 3%;
}

.section-gallery-item{
    margin-bottom: 1%;
    height: 0;
    padding-top: 75%;
    position: relative;
    display: block;
    background-color: #f0f0f0;
    z-index: 10;
}

.section-gallery-item:hover {
    z-index: 15;
}

.section-gallery-item img{
    display: block;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: auto;
    max-width: 100%;
    max-height: 100%;
}

/*---------------------------------------------*/

@media (max-width: 800px) {
    .section-gallery-conteiner {
        grid-template-columns: 1fr 1fr;
    }
}


@media (max-width: 400px) {
    .section-gallery-conteiner {
        grid-template-columns: 1fr;
    }
}