Single page hamburger menu on mobile

Hey,

I was wondering if anyone can suggest a way to have the hamburger navigation menu, which is organized in the usual folder structure, on a single page, where the folder elements are accessible by scrolling rather than clicking. Ideally the folder names would still be listed in a seperated font or something.

The folder structure should definetely still stay the same on desktop with the folders popping up when hovering over them.

I attached a quick mockup what I would imagine it to look like.

Can you share link to your site?

Some additional information I got.

I succesfully removed all content from the hamburger navigation menu on mobile using this CSS:

.header-menu-nav {
  visibility: hidden;
}

Additionally I was able to insert my own text using the :after tag in CSS:
 

.header-menu-nav:before {
  content: "";
  visibility: visible;
  white-space: pre;

}

This creates some awful bugs on the desktop site though, for example, depending on the amount of lines added through the content property, the upper part would not be clickable whatsoever anymore.