body{font-family:Source Sans Pro,Trebuchet MS,Lucida Grande,Bitstream Vera Sans,Helvetica Neue,sans-serif}.container{display:inline-block;width:20%;height:10em;position:relative;padding:1em}.card{-webkit-transform-style:preserve-3d;transform-style:preserve-3d;-webkit-transition:-webkit-transform .5s;transition:-webkit-transform .5s;-o-transition:transform .5s;transition:transform .5s;transition:transform .5s,-webkit-transform .5s;color:#fff}.card,.card figure{width:100%;height:100%}.card figure{cursor:pointer;display:block;position:absolute;margin:0;-webkit-backface-visibility:hidden;backface-visibility:hidden;line-height:2.5em;text-align:center;font-weight:700;font-size:4em}.card .front{background:grey}.card .back{background:blue}.card .back,.card.face-up{-webkit-transform:rotateY(180deg);transform:rotateY(180deg)}.new-game{font-size:4em;background:#075307;color:#fff;text-align:center;width:100%}.new-game:hover{background:green}