Newsletter sign-up form with success message solution

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

I added a bit animation for the success message box for fun ;-)

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

Nothing in particular, but when I researched on the keyframes css animation I found some useful resources that I'd like to share:

• @keyframes
• Making CSS Animations Feel More Natural
• CSS Bounce-in Animation

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

Any feedback is welcome!