✨First time using custom properties and mobile-first design

On this project I've learned many new things🥳:

First time making a website mobile first. First time using custom properties! Changed svg color from its code.

I'll keep working on this website as I still have to add the validation email message. Any ideas how to do it? I have never done it before. Any tips or tutorials are welcome. Also I have to make the svg icons change color while :hover