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

I'm happy with the overall design, next time I would try to do it with grid insted of flexbox

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

Struggled slighly with js but I managed to do it easily with help of google

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

I Would like to know what would be the best way to add a transition on a button which has on hover linear gradient but on normal state doesn't. It seems that transition doesn't work with background. So if anyone has any suggestions I would appreciate it.

Also any tips on how to improve css, js code are greatly appreciated.