Pod Request - Responsive - JS form validation - BEM

This is my first time using BEM. Even though it may not really be necessary for a small project like this, I enjoyed using it and found it helped structure my approach.

So, feedback specific to how I used BEM would be nice. I think I have a handle on it, but insights or corrections would be much appreciated.

It's also only my second JS challenge, so thoughts/criticisms/improvements on my JS solution would be great too.

Thanks! :)