.button{width:50%;height:5em;border:none;background-color:#bbdefb;color:#212121;font-size:3em;cursor:pointer;border-radius:10%}#app,.button{text-align:center}#app{font-family:Avenir,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;color:#2c3e50;margin-top:60px}