Color issue with Form

Can someone please help me understand why the background-color of my form is not coming up and how to fix it.
https://codepen.io/Mackdine/pen/dyyovvW?editors=1100

thank you for your time

There’s no CSS for form elements in your code. You do have CSS for a #form-outer element, but there’s no element in your HTML with that id.

I see. Can you please check this CSS?the same issue is still happening. https://codepen.io/Mackdine/pen/NWWqpeV?editors=1100

I think you meant form instead of #form in the CSS. The latter targets elements with an id attribute set to "form". The former targets all form elements on your page.