First challenge - qr code using HTML & CSS

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

I did this project a few weeks ago but uploading it sounded pretty complicated so I didn't do it - now I want to do more challenged and decided to finally learn how to do that. I don't even remember what exactly I did and I'm pretty sure I would've done some things differently with the little progress I made since completing this one, but I believe this is a good start.

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

Honestly I don't really remember...