Items Selector Standard

An interactive items showcase combining a card grid with a single detail panel. Selecting a card swaps the panel's title, description, CTA, and media (a main image plus up to 3 gallery thumbnails that open a fullscreen lightbox). A secondary extraInfo text sits beside the section header for supporting context. Ideal for service catalogs, capability lists, or any "select one, see detail" pattern — 1 to 8 items supported.