QR-code, used flex to my best ability. Didn't use any tools

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

Didn't take me long time at all, and haven't written css from scratch before

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

First made the CSS for desktop, wasn't sure how to do it well for mobile but think i figured it out?

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

Appreciate feedback on everything!