Button BG for Accordian

I’m creating an FAQ page using the layout block/button method as shown in Duncan’s video. Very easy and works great. Just one niggle I can’t find a way around and wondering if anyone has any possible solutions. Changing the hover and mouse clicked backgrounds to highlight the current question is great but if you click away from the question, i.e use your thumb on mobile, the highlighted question goes back to it’s default. Not a gamechanger but wondering if there is a way to keep it highlighted until clicked again.

Nick