body{margin:0;background:#e0e0e0;text-align:center}#card{-webkit-transform-style:preserve-3d;transform-style:preserve-3d;-webkit-transition:-webkit-transform .8s;transition:-webkit-transform .8s;transition:transform .8s;transition:transform .8s,-webkit-transform .8s;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;-webkit-touch-callout:none}#card-back,#card-front{display:block;width:100%;height:100%;border-radius:5px;position:absolute;-webkit-backface-visibility:hidden;backface-visibility:hidden}#card-back{background:#000;color:#fff}#card-front{background:#fff}#card-front,.mekuru{-webkit-transform:rotateY(180deg);transform:rotateY(180deg)}