How to remove the grey box when using navlinks

Hey! I’m having a problem. Whenever I use a nav link for linking on my own page, for example from the menu, the component of the page gets surrounded by a grey box. Any idea on how to remove that?

You can see the grey line at the bottom.

Here is my site Read-Only: [LINK](Webflow - Weblify)
(how to share your site Read-Only link)