.picture-column img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    object-position: top;
}
@media only screen and (min-width : 640px) {
    .picture-column img {
        height: 400px;
    }
}
@media only screen and (min-width : 768px) {
    .picture-column img {
        position: sticky;
        top: 0;
        height: 100vh;
    }
}