_gallery.scss

.row {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: flex-start;
    justify-content: center;
}
.col {
    display: inline-block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    box-sizing:border-box;
    padding: $img-spacing;
}

.one {
    width:33%;
}
.two {
    width: 66%;
}
.three {
    width: 100%;
}

figcaption {
    text-align: center;
}