body { margin: 0; overflow: hidden; font-family: 'Segoe UI', sans-serif; }
    #panel {
      position: absolute;
      top: 20px; left: 20px;
      background: rgba(0,0,0,0.75);
      color: #fff;
      padding: 15px 20px;
      border-radius: 12px;
      backdrop-filter: blur(10px);
      min-width: 220px;
    }
    .city-level { font-size: 18px; font-weight: bold; color: #ffd700; }
    .stat { margin: 4px 0; font-size: 14px; }