Responsive QR code component Using HTML CSS

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

This Challenge is the 1st Challenge Which I tried 2-3 months ago When I am learning CSS That time, I was not able to center this card, and I am literarily think I am not made for the coding and in mind I am cry but I watch tutorial(how to think of structure of the html and how to implement what properties I leaned )of projects then write now, I able to made this project by myself in 15 min .