Rename "Site Navigation" variables
Rename "Aricle Footer" variables
Revert "Logo" markup

Including "logo" into "Site Navigation" is a bad idea.
Reset "Logo" background color
Organize colors by modules, not by type
Replace *unqualified* attribute selectors

This changes does not replace *qualified* attribute selectors such as
`element[attribute="value"]`.
Version 6.44.2