#app{font-family:Avenir,Helvetica,Arial,sans-serif;text-align:center;margin-top:60px}nav ul{display:flex;justify-content:center;list-style:none;padding:0}nav ul li{margin:0 10px}.refresh-button{display:flex;justify-content:flex-end}.tabs{display:flex;justify-content:center;list-style:none;padding:0;border-bottom:2px solid #ddd}.tabs li{margin:0 10px}.tabs li a{padding:10px 20px;text-decoration:none;color:#555;border:1px solid #ddd;border-bottom:none;background-color:#f5f5f5;border-radius:5px 5px 0 0}.tabs li a:hover{background-color:#e5e5e5;color:#42b983}.router-link-active{background-color:#42b983;color:#fff;border-color:#42b983}