.flashcard{background-color:transparent;perspective:1000px}.flashcard_inner{position:relative;width:100%;text-align:center;transition:transform .8s;transform-style:preserve-3d}.flip{transform:rotateY(180deg)}.fc_back,.fc_front{position:absolute;width:100%;-webkit-backface-visibility:hidden;backface-visibility:hidden}.fc_back{transform:rotateY(180deg)}