.app{margin:0 auto;max-width:1200px;padding:20px}.nav{border-bottom:1px solid #eee;display:flex;gap:20px;margin-bottom:30px;padding:10px 0}.nav-link{border-radius:4px;color:#333;padding:5px 10px;text-decoration:none}.nav-link:hover{background-color:#f5f5f5}.main{padding:20px 0}