FAQ Accordion Card using CSS Flexbox

This challenge went well. I learnt to stop using divs for everything in my html as advised by @Lucas and the other Frontend Mentors and I also learnt some CSS tricks as well. But there's one thing I didn't do.....The README.md file in the project folder stated (as a BONUS) to complete the challenge without JavaScript and I didn't know how to ensure that only one question remains open in the card without it, so if you do know how to do it without JavaScript, please leave it in your feedback. Thanks for viewing my solution and have a wonderful day! :)