.app{font-family:Arial,sans-serif;max-width:1200px;margin:0 auto;padding:20px}nav{padding:20px 0;margin-bottom:20px;border-bottom:1px solid #eee}nav a{color:#2c3e50;text-decoration:none;margin:0 10px}nav a.router-link-active{color:#42b983;font-weight:700}