*{box-sizing:border-box;padding:0;margin:0}ul li{text-decoration:none}.flex-center{justify-content:center}.flex-center,.flex-left{display:flex;align-items:center}.flex-column{display:flex;flex-direction:column}.flex-between{justify-content:space-between}.flex-between,.flex-right{display:flex;align-items:center}.flex-right{justify-content:flex-end}#app{font-family:Avenir,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;color:#2c3e50}