Responsive QR-code

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

I think when I made it responsive I tried different screen sizes zooming in/out and i notice it adjust and resize properly. I want it to be responsive as possible without using media queries.

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

positioning img, container, text like

1. margin
2. padding
3. width
4. height

I guess by using properties max-min and values of vh, % and flex box

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

positioning when to use this property min/max, width/height and values of %,vh or any other than can help me position it properly.