body {
      font-family: 'Cairo', sans-serif;
      display: flex;
      justify-content: center;
      align-items: center;
      min-height: 100vh;
      margin: 0;
      background: linear-gradient(135deg, #6a0dad 0%, #9c27b0 100%);
      color: white;
      text-align: center;
    }
    .success-container {
      background: rgba(255, 255, 255, 0.1);
      padding: 40px;
      border-radius: 20px;
      backdrop-filter: blur(10px);
    }
    .spinner {
      border: 4px solid rgba(255, 255, 255, 0.3);
      border-top: 4px solid white;
      border-radius: 50%;
      width: 50px;
      height: 50px;
      animation: spin 1s linear infinite;
      margin: 20px auto;
    }
    @keyframes spin {
      0% { transform: rotate(0deg); }
      100% { transform: rotate(360deg); }
    }