.imagegrid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 3rem;
}

.imagegrid>div {
    padding: 1rem;
    position: relative;
    height: 180px;
}

.imagegrid>div::before {
    content: "";
    display: block;
    padding-bottom: 100%;
}

.imagegrid>div img {
    position: absolute;
    max-height: 100%;
    max-width: 100%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}