> Zuckerberg also cautioned users against clearing cookies in their browser, saying “it can make parts of your experience worse”, and adding, “Your Facebook won’t be as good while it relearns your preferences.”
Not trying to rain on his/her parade, they're definitively cool and well done.
But "CSS only" used to mean super hacky things that CSS wasn't supposed to be able to do but at this point it's basically the same rendering engine under the covers as SVG.