#app{font-family:Avenir,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-align:center;color:#2c3e50}nav{padding:30px}nav a{font-weight:700;color:#2c3e50}nav a.router-link-exact-active{color:#42b983}.page{width:100%;height:100vh;position:relative}.null{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%)}.btn{position:fixed;bottom:20px;left:50%;transform:translateX(-50%)}