Tap a collapsed pill → it expands inline to its controls (an accordion, several can be open at once). Tap the header again → back to a pill. Below is the expanded content for every card. The 3D preview has one extra level — its ⤢ Expand button opens a big modal (bottom of page).
Only the 3D preview drills one level deeper. Its ⤢ button opens a large centered modal — same box, bigger, with the fold slider. Close with ✕ / backdrop / Esc.