Newsletter sign-up form with success message

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

I would probably try to plan this better next time as i feel i've been just putting out fires while making this instead.

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

Had some trouble with chrome's input internal autofill overwriting my stylings, that i didn't manage to fix....tried a few solutions i found but they didn't quite work.