p.ref {
    font-size: 0.5em;
    text-align: right;
    /*color: blue;*/
}

.wrapper {
    display: grid;
    grid-template-columns: 25% 25% 25% 25%;
    grid-template-rows: auto auto auto;
    align-items: center;
    justify-items: center;
}

.reveal section img.grid-item {
    object-fit: contain;
    grid-row: span;
    height: 200px;
    border: none;
    background: none;
}

.reveal section img.grid-img {
    background: none;
    border: none;
    box-shadow: none;
    object-fit: contain;
}