There are, in-fact, and have been for a while several known ways do do this in CSS 2.1 this just being another with a similar long list of restrictions and cont

There are, in-fact, and have been for a while several known ways do do this in CSS 2.1 this just being another with a similar long list of restrictions and context requirements. http://css-tricks.com/centering-in-the-unknown/ http://css-tricks.com/centering-in-the-unknown/ They're all much of a muchness, at least we'll be able to just use flexbox soon enough.