Move <header> to layout.erb; merge with <nav>.
Reorder Variables in _base.
Remove container class from <header>.
Merge navigation links into one <ul>.
Add tag-end comment to the guidelines section.
Add container-expanded class to increase video-player width.
Uncomment and edit Navigation styles.
Move container class on donation section one tag deeper.
Move section-video-player and twitch classes up the stylesheet.
Move donation-widgets and guidelines below video-player.
Rename section "Variables" to "Design" in _base.
Organize variables in sub-sections and remove value alignment.

Aligning variables got a bit out of hand. I was aligning every
variable to the same column, so even if it's a short variable
the colon could potentially be really far out.

I've also lately been doing a bunch of work then commiting,
so adding more variables, spacing out the other values and
then looking at my changes for commiting was a confusing mess.

If I'm going to do this again variables will be aligned to others
in their section, and not with every single variable in the file.
Add $nav-link-* variables.
Edit styles for section-header(-outside).
Style up <nav> links.

Need to figure out how to make them full height.
height: 100%; doesn't seem to work anywhere.
Add link to site logo.
Tweak existing <nav> link styles.
Edit site-logo class to fix line-height issue.
Add link styling for .site-logo.