.instagram_list_img {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin: 0;
    padding: 0;
    list-style: none;
}

.instagram_item_img {
    flex: 0 0 calc(20% - 10px);
    margin-bottom: 20px;
    position: relative;
    padding-top: calc(20% - 10px);
}

.instagram_item_img a {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: block;
    overflow: hidden;
}

.instagram_item_img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    top: 0;
    left: 0;
}

@media (max-width: 768px) {
    .instagram_item_img {
        flex: 0 0 calc(50% - 3px);
        padding-top: calc(50% - 3px);
        margin-bottom: 5px;
    }
}