.flex_img_gallery {
    display: flex;
    flex-wrap: wrap;
}

.flex_img_gallery_item {
    flex-basis: 10vw;
}

.flex_img_gallery_item:hover {
    flex-basis: 30vw;
}

/* set img container within flex_img_gallery_item class */
.flex_img_gallery_item img {
    object-fit: cover;
    max-width: 100%;
    height: auto;
    vertical-align: middle;
    margin: 0px;
}

.flex_img_model_name {
    font-size: 1vmin;
}

.flex_img_gallery_item:hover > .flex_img_model_name {
    font-size: 4vmin;
}

.grid_ensemble_overview {
    display: grid;
    grid-template-columns: 25% 25% 25% 25%;
    grid-template-rows: auto;
    grid-template-areas: 
          "annual annual DJF MAM"
          "annual annual JJA SON"
}

.grid_img_gallery_item {
    object-fit: cover;
    width: 100%;
    position: relative;
}

.grid_img_gallery_season_name {
    position: absolute;
    top: 3vmin;
    left: 3vmin;
    font-size: 4vmin;
}