Each poster title is now the <summary> trigger itself, with the "Posters" label sitting above the list as a small uppercase heading outside the accordion. The chip is gone, and the download link lives inside the expanded panel. The two items share a bordered list style by removing the top border on the second item.

Now it's a single "Posters" accordion with two self-named anchor tags inside — no download buttons, no chips, no separate accordions per item.