#app1{font-family:Avenir,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;color:#2c3e50}#app1,button{text-align:center}button{background-color:#008cba;border:none;color:#fff;padding:15px 32px;text-decoration:none;display:inline-block;font-size:16px}