Fixed navbar obscures content during linking

[crertel]

If you follow a link to an anchor on a page, that will get scrolled to the top. However, the navbar is outside the flow and will obscure it.

Example:

https://nixos.org/values/#community-values-whatis

Possible solutions:

• Anchor the navbar to the beginning of the page instead of having it float.
• Move the content to its own div and force it to render below the navbar (margin top trick or similar)
• Something else