FAQ accordion card using Sass

I coded desktop first, using Sass. My first JS project on Frontend Mentor :)) It was challenging for me to put svg in a pseudo element, but I'm happy & relieved to be able to figure out how it works finally.

I wondered if I should fix the width of the container, either with vw or rem to make it responsible for all the devices and locate svg always at the same location however the container width changes. I used rem this time, but I'm not sure if it was the right practice.

Any feedback and suggestion for improvement would be very much appreciated :)!!