body,html{width:100%;height:100%;margin:0}body{background-image:linear-gradient(rgba(50,50,50,.1),rgba(50,50,50,.3),rgba(50,50,50,.1)),url(../img/bg.52a05553.jpg);background-size:cover}#app{height:100%;font-family:Avenir,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;display:flex;flex-direction:column;justify-content:center;text-align:center;align-items:center}.test-border{border:1px solid red}