#urn img {
    width: 100%;
    max-width: 400px;
    max-height: 404px;
}
#plantfinder-flex-container {
    display: flex;
}
#plantfinder-flex-container figure {
    order: 2;
}
#plantsearch-form {
    background-color: #CCCC99;
    padding: .3125em;
    border: 2px solid black;
    text-align: center;
    margin: auto;
}
#plantsearch-form p {
    margin-top: 0;
    margin-bottom: .5em;
}
#catalog-search-header {
    font-size:  x-large;
    margin-bottom: 0;
    margin-top: .625em;
    padding: .2083em;
}

/* Override #search-box width to match form,
   and let them scale down on small screens. */
#search-box,
#plantsearch-form {
    width: 100%;
    max-width: 400px;
}

@media only screen and (max-width: 1500px) {
    /* Move picture below forms on small screens. */
    #plantfinder-flex-container {flex-direction: column;}
}

#urn img { /* Keep fixed image size. */
    width: 400px;
    height: 404px;
}
@media only screen and (max-width: 500px) {
    #urn img { /* Maintain aspect ratio when scaling down. */
        height: auto;
        max-width: 100%;
    }
}