What did i miss?

I am currently working on a responsive web design project, i am stuck on getting the form to show (i am using the form mailto option. I set up the form to only be an email and submit button similar to the example, only difference is I want to incorporate the mailto option so its a fully functioning form.
I’ve stared at this for an hour now! and im sure its something super stupidly simple, but im just missing it.
edited to add: the entire form code works in the w3schools try it editor, but not codepen

Heres my project: https://codepen.io/shawna-rowe/full/WyEBxe/

Heres the course im working: https://learn.freecodecamp.org/responsive-web-design/responsive-web-design-projects/build-a-product-landing-page

Your fixed header is covering your form. Give the form an upper margin and you’ll see it.