QR Code Component with flexbox css

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

I am proud of the work done, I want to be able to improve and I am very enthusiastic about achieving it, next time I would improve with the feedback you can give me.

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

To many it seems like a simple project but it is quite the opposite for someone without experience, for example the mobile view I had to research mediaqueries css to be able to make it responsive, and also how to sit the entire card in the center of the screen.

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

I would like you to help me know if my code in general is good, and also in the uses of measures and flexbox