Landing Page with curved sections

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

I'm glad I made my first web page. I thought it would be complicated to make the wave effect visible, but it wasn't. Very easy to do.

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

Adding that check to the input is a bit tricky. I first tried to use the pattern attribute for a regular expression but after some research I found out that browsers already have an algorithm to do this check. Knowing this I just had to worry about displaying the little messages. I just added them to a div, assigned a display none to them and with a bit of JavaScript decided which message would have a display block.

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

How to make a more complex form validation