Press mouse and then move for camera rotation. You can click keys.
I was obsessed with idea of recreation almost real 3D object with non-trivial shapes in Pure CSS. And i made this :D
Doesn't works in IE, because it's relies on transform-style: preserve-3d. Probably have tons of bugs. Pointless, but fun (c)
Based on this dribble - https://dribbble.com/shots/1971924-Bontempi