Interactive card details form (HTML/CSS/JS & Responsive)

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

Hello, here is my solution for this challenge :)

I'm pretty proud of the way my website looks compared to the original design ! Also, I think that I have done the JavaScript side well (check all inputs, display the errors, etc...). Finally, I added a small animation on cards (front & back) when the user submit the form thanks to "pseudo-elements".

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

In my opinion, responsiveness could be improved. In fact, I used a lot of "media queries" and all sizes are fixed with pixels.

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

I think that I need help concerning responsiveness... Maybe that my code is not relevant for that ? For now, I don't know.

I will take all the help you give me :) Thank you.