Layout issue

I’m trying to achieve the look on this page (https://abcfolio.com/staff-search-categories-live-preview/), particularly the plus sign (+) that is used to expand the table rows, and the way most of the information on each row “wraps” into the expandable section when in mobile. Not seeing any options for that in the admin, or in the documentation. Can you let me know how to do that (or point me to where in the docs that’s described?). Thanks.