body{margin:0;font-family:sans-serif}.app{display:flex;min-height:100vh}.menu{background:#1e3a8a;color:#fff;width:220px;padding:1rem;display:flex;flex-direction:column;gap:1rem}.menu nav a{display:block;color:#fff;text-decoration:none;margin:6px 0}.menu nav a.router-link-active{font-weight:700;background:#3b82f6;border-radius:4px;padding:4px 6px}.content{flex:1;padding:1.5rem;background:#f8fafc}