#search-results{
    position: absolute;
    top: 100%;          /* place right under input-group */
    left: 0;
    right: 0;
    z-index: 1050;      /* above other elements */
    overflow-y: auto;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    margin-top: 1%;
}

@media only screen and (max-width: 600px) {
    #category-select{
        width: 100% !important;
        border-radius: 0;
    }
}