Most of this is just shuffling the footer around so we can put it after the content (instead of after the whole menu) when rendering a profile menu.

Then the rest is magic.

Also:

• this rule only activates on desktop; and
• if it doesn't work for some reason, everything still looks mostly OK, the menu just won't be as tall as the window on pages with a small amount of content.

wut

ya i kno rite

im flagging this for later when someone says it doesn't work on Android on a 2G connection in the outback.