Day of the word is "film", so here is a clapperboard (a.k.a. slate) needed in every film set to help with the audio/video synchronization. It animates a little on hover.
perspective to simulate the 3D, but there's more to it: as the clapperboard is drawn with a single HTML tag we don't have enough elements to go "full 3D." The solution was using shadows and stacking them in a way that provides a fake sense of perspective (on top of the CSS perspective.)