Overall this was really nice, although I do have some feedback to give
For the side panel, I noticed that it was slightly off-center, not too much but like enough so I could be like “Oh honey that’s off-center”, as shown in the screenshot below:
I drew a line down the middle to show what you already know. Sorry it’s not exact I eyeballed it
The pop-down was really large for my screen, I don’t know if that was on purpose, but it was a lot more distracting than necessary.
I also noticed that after the pop-up went back up there was a tiny tiny sliver still peeking out, shown below:
Other than that, this was so well-done, I loved the gradient pattern so much! Amazing job, keep up the great work! ツ