I'm unclear what this commit is for, but I have to get these out of the way before I can merge my most recent changes from the 'testing' branch.
Revert "I'm unclear what this commit is for, but I have to get these out of the way before I can merge my most recent changes from the 'testing' branch."

This reverts commit 27a2518a0b9c34a0b3ffdc6fc93a0835a4ab134c.
Merge branch 'testing'
Merge branch 'testing'
Merging most recent changes from 'testing' branch.
Merging most recent changes from testing branch.
Merge branch 'testing'
Merging the testing branch into the master branch.
I'm not sure whether this commit is the one I was aiming for. Just trying to merge my latest changes from the 'testing' branch.
More background color experiments, including the mobile-nav menu items and the footer. Also trying some new viewport specs to solve the non-mobile-by-default problem on iOS.