body {
      background-color: #f8f8f8;
      display: flex;
      justify-content: center;
      align-items: center;
      height: 100vh;
      font-family: system-ui, sans-serif;
      color: #333;
    }
    .card {
      width: 50%;
      background: #fff;
      box-shadow: 0 4px 16px rgba(0,0,0,0.1);
      border-radius: 16px;
      padding: 2rem;
      text-align: center;
      animation: zoomIn 0.6s ease-out;
    }
    @keyframes zoomIn {
      from { transform: scale(0.8); opacity: 0; }
      to { transform: scale(1); opacity: 1; }
    }
    h2 { margin-bottom: 1rem; }
    p { font-size: 1.1rem; color: #666; }
    .loading {
      margin-top: 1.5rem;
      font-size: 0.95rem;
      color: #999;
    }