#app{font-family:Avenir,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-align:center;color:#2c3e50;margin-top:80px}#background-img{position:fixed;text-align:right;bottom:0;width:100%;height:75px}.mfaPref{margin:0 auto;width:390px}.auth{margin:0 auto;width:360px}.toggle{cursor:pointer;font-size:18px}.tree-nav{width:380px;float:left;background-color:#f9f9f9;overflow-y:auto}.content{overflow:hidden}