Newsletter challenge with a little animation, SASS and vanilla JS

Hi Frontend Mentor community 👋

This is my solution on the newsletter sign up. Overall a fun challenge to deal with. In this challenge I tried to start applying the BEM metodology, as I'm still learning this metodology I was not 100% sure in how to name everything. I also tried to start using separeted files for the media queries using SASS, but I cound not figure why it was giving some errors, so I leave them in the same SCSS file. What do you think of my approach to this challenge? What could I improve overall?

Thanks in advance for the feedback and the tips!😄