What is Sakura's Chakra Element?
From what I can tell, it was never announced officially. While she is shown to have some main skills--medical ninjutsu and strong resistance to genjutsu--her chakra element isn't mentioned.

Everything that I have found (NarutoHurricane.com, Naruto Wikia, etc.) either lists it as a ? or doesn't list it at all. Naruto Wikia lists her chakra transformations (Earth Release, Water Release, Yin Release and Yang Release) but doesn't give her element.