QR Code Component Challenge. Only HTML5 and CSS.

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

Since this was my first challenge, I had to review what the Frontend Mentor workflow is like.

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

For now, I need to improve my frontend knowledge, it is not my strong point.

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

I want to get ideas about how to implement in the best way possible the HTML and CSS structure.