Problem with landing page project!

Tell us what’s happening:
" Your #nav-bar should always be at the top of the viewport."

i already did that and my header stick to the top and also i tested my project with JS tester and it pass all , the site get updated and now need the code like any thing on it not like we was uploading on codepen before so pls someone tell me how can i fix that

Your code so far

WARNING

The challenge seed code and/or your solution exceeded the maximum length we can port over from the challenge.

You will need to take an additional step here so the code you wrote presents in an easy to read format.

Please copy/paste all the editor code showing in the challenge from where you just linked.

Replace these two sentences with your copied code.
Please leave the ``` line above and the ``` line below,
because they allow your code to properly format in the post.

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.54 Safari/537.36

Challenge: Build a Product Landing Page

Link to the challenge:

  1. List item

The new Responsive Web Design curriculum content has been released.

FAQ:

  1. Can I complete the old content?
  • Yes. The old content is still available, and has been moved to the bottom of the curriculum map and renamed to Responsive Web Design Legacy
  1. What will happen to my progress?
  • Nothing. Your past progress will still be available in the Responsive Web Design Legacy curricula
  1. Can I claim the old certificate?
  • The certifications are exactly the same. All you need to claim a certificate is to complete the 5 Certification Projects which are identical for both the Responsive Web Design and Responsive Web Design Legacy curricula
  1. Should I stop doing the legacy content, and just start over with the new content?
  • This is entirely up to you. Majority of the topics are the same - just taught in a different way. (See Project-Based Curricula)
  1. How do I use the new editor?
  • The new editor is as close to an external text editor as we wanted to get it. If the files for the challenge have been enabled, you can access the index.html and styles.css tabs which you should use for the respective code.
  • Two main differences between this editor and other online editors:
    • You need to link your styles.css file to your HTML (just like you would in real web-development), by adding the following line to the head of your HTML:
<link href="styles.css" />
    • You are encouraged to include the DOCTYPE, html, head and body tags for each project.

i did that all , and all is working just that error

please copy your code from the editor and paste it here in a new post

When you enter a code block into a forum post, please precede it with a separate line of three backticks and follow it with a separate line of three backticks to make it easier to read.

You can also use the “preformatted text” tool in the editor (</>) to add backticks around text.

See this post to find the backtick on your keyboard.
Note: Backticks (`) are not single quotes (’).