div.sponsor_content {
    display: grid;
    grid-template-rows: 400px;
    grid-auto-rows: 400px;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 10px;
}

div.sponsor_content .sponsor {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

div.sponsor_content .sponsor img {
    width: 90%;
}

div.sponsor_content .sponsor img.byheight {
    width: auto !important;
    height: 90%;
}