Time tracking dashboard with vanilla html/css/js

What are you most proud of, and what would you do differently next time?

I am proud that I could implement interactivity into this project

What challenges did you encounter, and how did you overcome them?

I found this project to be more challenging than the previous ones and I had this problem where the event listeners on my buttons where not working, but after hours of guessing I found out it was due to using z-index: -1 which made my buttons unclickable. So I had to remove it but the design did not turn out the way I wanted it to be.

What specific areas of your project would you like help with?

Can someone please tell me how can I improve my grid for the desktop design (in the media query)? I want the first column to span the whole two rows but that is not happening.