.image-grid {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr)); /* Three columns */
    gap: 10px;
    justify-items: center;
    align-items: center;
}

    .image-grid img {
        max-width: 100%;
        height: auto;
        grid-column: span 2;
    }

        .image-grid img:nth-child(4) {
            grid-column-start: 2;
            grid-column-end: 4;
        }

        .image-grid img:nth-child(5) {
            grid-column-start: 4;
            grid-column-end: 6;
        }