Border radius on nested Accordions are incorrect

Created by: alondon17

Chrome 91.0.4472.124 Windows 10

Nested Accordions behave very weirdly. the :first-of-type and :last-of-type logic also apply to children so their borders are rounded where they shouldn't be, and there seems to be a space between the background and the border sometimes, spacing is acting weird this is noticable when addinng a background