Responsive landing page using CSS Grid

Hi!

I think that's my last newbie challenge, time to move forward :) I'd be grateful for any feedback, especially regarding my js. I know it's not perfect - I think I could use a flag to toggle active/inactive state and reduce my code to one function (am I thinking right?). I'm going to go back to this challenge after some time.

Different active state layouts for mobile and desktop were a challenge, but I managed to make it functional and responsive. If you have any suggestions to my css I'd be happy to read them!

Thanks for all feedback