section#gallery{
    position: relative;
}

section#gallery ul{
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid: 300px / 1fr 1fr;
    grid-auto-rows: 300px;
    gap: 20px;
}

section#gallery ul li a{
    width: 100%;
    height: 100%;
}

section#gallery ul li img{
    height: 100%;
    width: 100%;
    object-fit: cover;
    border-radius: 10px;
}