Adding Space Between Elements

Site URL: https://www.khayatibykamy.com/

I was wondering if anyone knows how to add space in between each elements of this gallery page. I want to add padding to each picture so that there is some space in between them but can't figure out how. Thanks!

Add to Home > Design > Custom CSS

@media screen and (min-width: 901px) {
    #grid .item {
        border: 10px solid #fff;
        box-sizing: border-box;
        overflow: hidden;
    }

    #grid .item img {
        height: 100% !important;
    }

    #grid .item .wrapper {
        margin: 30px;
    }
}

#grid .item .wrapper {
    margin: 0 !important;
}