QR-Code Windows using HTML and CSS only

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

Proud of being able to complete the challenge quickly and proud of the responsiveness I was able to implement. Next time I'd like to optimize more my code.

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

The .attribution class was maybe the most problematic part in terms of optimization. Also, the rounded corners of the QR-code image made me question whether an empty tag was an acceptable solution.

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

Code optimization (when Flexbox should NOT be used, mistakes on tags usage)