Bookmark Landing page with mobile slide menu and faq toggle

Hello!

I'm very proud of this intermediate challenge but i did have some trouble getting the animation for the up and down arrows to work for the subsequent FAQ answers when you toggle them. I am also curious as to how others went about coding the error message. I tried using position in CSS for mobile but then I couldn't get it to work on desktop so i just gave it a red border and alert if the email pattern didn't match the rule I had set in the js file.

Would appreciate any help and advice or criticism!