@media all and (-webkit-transform-3d) {

    #board {
        -webkit-perspective: 2000;
    }

    #board #swivel div.front, #board #swivel div.back {
        -webkit-backface-visibility: hidden;
        z-index: 2 !important;
    }

    #board div.back {
        -webkit-transform: rotateY(180deg);
    }

    #board #swivel {
        -webkit-transform-style: preserve-3d;
        -webkit-transition: -webkit-transform .5s;
    }

    #board:hover #swivel {
        -webkit-transform: rotateY(180deg);
    }

}