QR code with flex and margin

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

I am most proud of the fact that the website looks similar to what it was supposed to look like, I don't know what I would like to do differently next time

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

I had a little problem with centering the div :P

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

I would like to learn how to deal better with naming in css and html, and maybe something about page sizes, how these sizes behave when the page is enlarged or minimized