#loading-modal {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-color: rgba(0, 0, 0, 0.7);
      z-index: 1999; /* Máxima prioridad para superponerse */
      display: none; /* Oculto por defecto */
      justify-content: center;
      align-items: center;
      color: white;
      font-family: Arial, sans-serif;
      flex-direction: column;
    }

    .spinner {
      border: 8px solid #f3f3f3;
      border-top: 8px solid #3498db;
      border-radius: 50%;
      width: 60px;
      height: 60px;
      animation: spin 1s linear infinite;
      margin-bottom: 20px;
    }

    @keyframes spin {
      0% { transform: rotate(0deg); }
      100% { transform: rotate(360deg); }
}