// Modal para relacionar importadores a una credencial VUCEM
function RelacionarImportadoresModal({ open, onClose, vucem }) {
  const [importadoresDisponibles, setImportadoresDisponibles] = React.useState([]);
  const [importadoresSeleccionados, setImportadoresSeleccionados] = React.useState([]);

  React.useEffect(() => {
    if (!open || !vucem) return;
    // Obtener ambos listados en paralelo
    Promise.all([
      fetchWithAuth(import.meta.env.VITE_EFC_API_URL + '/customs/importadores/').then(res => res.json()),
      fetchWithAuth(import.meta.env.VITE_EFC_API_URL + `/vucem/usuario-importador/?vucem=${vucem.id}`).then(res => res.json())
    ]).then(([importadoresAll, relaciones]) => {
      // Agrupar relaciones por RFC, tomar la más reciente (última) para cada RFC
      const relacionesPorRfc = {};
      relaciones.results.forEach(rel => {
        relacionesPorRfc[rel.rfc] = rel; // sobrescribe, así queda la última
      });
      const seleccionados = Object.values(relacionesPorRfc).map(rel => {
        const base = importadoresAll.find(i => i.rfc === rel.rfc) || {};
        return {
          ...rel,
          nombre: base.nombre || rel.rfc,
          organizacion: base.organizacion || rel.organizacion
        };
      });
      setImportadoresSeleccionados(seleccionados);
      // Disponibles = todos menos los seleccionados (por RFC)
      const seleccionadosRFC = new Set(seleccionados.map(i => i.rfc));
      setImportadoresDisponibles(importadoresAll.filter(i => !seleccionadosRFC.has(i.rfc)));
    });
  }, [open, vucem]);

  if (!open || !vucem) return null;

  // Mover importador de disponibles a seleccionados
  const seleccionarImportador = async (imp) => {
    // POST para crear la relación
    try {
      // Usar siempre la organización del registro vucem
      const body = {
        vucem: vucem.id,
        rfc: imp.rfc,
        organizacion: vucem.organizacion
      };
      const res = await fetchWithAuth(
        import.meta.env.VITE_EFC_API_URL + '/vucem/usuario-importador/',
        {
          method: 'POST',
          headers: { 'Content-Type': 'application/json' },
          body: JSON.stringify(body)
        }
      );
      if (!res.ok) throw new Error('Error al relacionar importador');
      const data = await res.json();
      // Guardar el id de la relación en el importador seleccionado
      const impConRelacion = {
        ...imp,
        id: data.id, // para que el botón de quitar funcione correctamente
        usuario_importador_id: data.id
      };
      setImportadoresDisponibles(importadoresDisponibles.filter(i => i.rfc !== imp.rfc));
      setImportadoresSeleccionados([...importadoresSeleccionados, impConRelacion]);
    } catch (err) {
      alert('No se pudo relacionar el importador.');
    }
  };
  // Mover importador de seleccionados a disponibles
  const quitarImportador = async (imp) => {
    // DELETE para eliminar la relación usando el id de la relación
    try {
      // Buscar el id de la relación usuario-importador en el objeto importador
      const relacionId = imp.usuario_importador_id || imp.id_relacion || imp.id;
      if (!relacionId) {
        alert('No se encontró el id de la relación usuario-importador.');
        return;
      }
      const url = `${import.meta.env.VITE_EFC_API_URL}/vucem/usuario-importador/${relacionId}/`;
      const res = await fetchWithAuth(url, { method: 'DELETE' });
      if (!res.ok) throw new Error('Error al eliminar relación');
      setImportadoresSeleccionados(importadoresSeleccionados.filter(i => i.rfc !== imp.rfc));
      setImportadoresDisponibles([...importadoresDisponibles, imp]);
    } catch (err) {
      alert('No se pudo eliminar la relación del importador.');
    }
  };

  return (
    <div className="fixed inset-0 z-50 flex items-center justify-center bg-black bg-opacity-40">
      <div className="relative mx-auto w-full max-w-3xl bg-white rounded-lg shadow-2xl transform transition-all duration-300 animate-in slide-in-from-bottom-4">
        {/* Header formal en escala de azules */}
        <div className="bg-gradient-to-r from-blue-700 to-blue-900 rounded-t-lg p-4 text-white border-b-2 border-blue-500">
          <div className="flex items-center justify-between">
            <div className="flex items-center space-x-3">
              <div className="bg-blue-500 bg-opacity-30 rounded-lg p-2 border border-blue-400 border-opacity-30">
                <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z" />
                </svg>
              </div>
              <div>
                <h3 className="text-lg font-semibold tracking-wide">Relacionar Importadores</h3>
                <p className="text-blue-200 text-xs font-medium">Asocia importadores a la credencial seleccionada</p>
              </div>
            </div>
            <button
              onClick={onClose}
              className="text-blue-100 hover:text-white transition-colors p-2 hover:bg-blue-600 hover:bg-opacity-50 rounded-lg border border-blue-500 border-opacity-30"
            >
              <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M6 18L18 6M6 6l12 12" />
              </svg>
            </button>
          </div>
        </div>
        {/* Contenido del modal */}
        <div className="p-4 max-h-[85vh] overflow-y-auto">
          <div className="flex flex-col md:flex-row md:justify-between md:items-center mb-4 gap-2 border-b pb-2 border-blue-100">
            <div className="flex items-center gap-2">
              <span className="text-xs font-semibold text-gray-500 uppercase tracking-wider">Usuario:</span>
              <span className="inline-block bg-blue-100 text-blue-700 rounded px-2 py-0.5 text-xs font-bold shadow-sm">{vucem.usuario}</span>
            </div>
            <div className="flex items-center gap-2">
              <span className="text-xs font-semibold text-gray-500 uppercase tracking-wider">Patente:</span>
              <span className="inline-block bg-blue-100 text-blue-700 rounded px-2 py-0.5 text-xs font-bold shadow-sm">{vucem.patente}</span>
            </div>
          </div>
          <div className="grid grid-cols-1 md:grid-cols-2 gap-4 w-full">
            {/* Importadores disponibles */}
            <div>
              <h3 className="text-sm font-semibold text-blue-700 mb-2">Disponibles</h3>
              <ul className="border border-blue-100 rounded-lg divide-y divide-blue-50 bg-gray-50 shadow-sm">
                {importadoresDisponibles.length === 0 && (
                  <li className="text-gray-400 text-center py-3 text-sm">Sin importadores</li>
                )}
                {importadoresDisponibles.map(imp => (
                  <li
                    key={imp.id}
                    className="px-3 py-2 cursor-pointer hover:bg-blue-100/70 transition rounded flex items-center gap-2 group text-sm"
                    onClick={() => seleccionarImportador(imp)}
                  >
                    <span className="flex-1 font-medium text-gray-700 truncate">
                      <span className="inline-block bg-white border border-blue-200 text-blue-700 rounded px-2 py-0.5 text-xs font-semibold mr-2 align-middle shadow-sm">
                        {imp.rfc}
                      </span>
                      {imp.nombre}
                    </span>
                    <button
                      className="ml-2 px-3 py-1 bg-blue-600 text-white rounded shadow hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-blue-400 text-xs font-semibold"
                      title="Agregar"
                    >
                      Agregar
                    </button>
                  </li>
                ))}
              </ul>
            </div>
            {/* Importadores seleccionados */}
            <div>
              <h3 className="text-sm font-semibold text-blue-700 mb-2">Seleccionados</h3>
              <ul className="border border-blue-200 rounded-lg divide-y divide-blue-100 bg-blue-50 shadow-sm">
                {importadoresSeleccionados.length === 0 && (
                  <li className="text-gray-400 text-center py-3 text-sm">Sin seleccionados</li>
                )}
                {importadoresSeleccionados.map(imp => (
                  <li
                    key={imp.id}
                    className="px-3 py-2 cursor-pointer hover:bg-blue-200/80 transition rounded flex items-center gap-2 group text-sm"
                    onClick={() => quitarImportador(imp)}
                  >
                    <button
                      className="mr-2 px-3 py-1 bg-gray-300 text-gray-800 rounded shadow hover:bg-gray-400 focus:outline-none focus:ring-2 focus:ring-gray-400 text-xs font-semibold"
                      title="Quitar"
                    >
                      Quitar
                    </button>
                    <span className="flex-1 font-medium text-gray-700 truncate">
                      <span className="inline-block bg-white border border-blue-300 text-blue-700 rounded px-2 py-0.5 text-xs font-semibold mr-2 align-middle shadow-sm">
                        {imp.rfc}
                      </span>
                      {imp.nombre}
                    </span>
                  </li>
                ))}
              </ul>
            </div>
          </div>
          <div className="flex justify-end mt-4 w-full">
            <button
              onClick={onClose}
              className="px-5 py-1.5 bg-blue-600 text-white rounded-lg font-semibold shadow hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-blue-400 text-sm"
            >
              Cerrar
            </button>
          </div>
        </div>
        <style>{`
          @keyframes fade-in { from { opacity: 0; transform: scale(0.95); } to { opacity: 1; transform: scale(1); } }
          .animate-fade-in { animation: fade-in 0.3s ease; }
        `}</style>
      </div>
    </div>
  );
}
import React, { useEffect, useState } from 'react';
import { fetchWithAuth, postWithAuth, putWithAuth, deleteWithAuth, putFormDataWithAuth, postFormDataWithAuth, patchWithAuth } from '../fetchWithAuth';
import { useUser } from '../context/UserContext';

const API_URL = import.meta.env.VITE_EFC_API_URL;
export default function Vucem() {
  // Estado para modal de relacionar importadores

  const isDebugMode = import.meta.env.VITE_DEBUG_MODE === 'true';
  const [showRelacionarModal, setShowRelacionarModal] = useState(false);
  const [selectedVucem, setSelectedVucem] = useState(null);
  const [vucemList, setVucemList] = useState([]);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState(null);
  const [showCreateModal, setShowCreateModal] = useState(false);
  const [showEditModal, setShowEditModal] = useState(false);
  const [editVucem, setEditVucem] = useState(null);
  const [showDeleteModal, setShowDeleteModal] = useState(false);
  const [deleteVucem, setDeleteVucem] = useState(null);
  const [organizaciones, setOrganizaciones] = useState([]);
  const { user: currentUser } = useUser();
  
  // Estado para formulario de creación/edición
  const initialForm = {
    usuario: '',
    organizacion: '',
    password: '',
    patente: '',
    efirma: '',
    key: null,
    cer: null,
    is_importador: false,
    acusecove: false,
    acuseedocument: false,
    is_active: true,
  };
  const [form, setForm] = useState(initialForm);

  // Estados para controlar visibilidad de contraseñas y copiar
  const [showPassword, setShowPassword] = useState({});
  const [showEfirma, setShowEfirma] = useState({});
  const [copySuccess, setCopySuccess] = useState('');

  // Estados específicos para modal de edición (siempre ocultos por defecto)
  const [showEditPassword, setShowEditPassword] = useState(false);
  const [showEditEfirma, setShowEditEfirma] = useState(false);

  // Estados específicos para modal de creación
  const [showCreatePassword, setShowCreatePassword] = useState(false);
  const [showCreateEfirma, setShowCreateEfirma] = useState(false);

  // Funciones para alternar visibilidad
  const togglePasswordVisibility = (id) => {
    setShowPassword(prev => ({
      ...prev,
      [id]: !prev[id]
    }));
  };

  const toggleEfirmaVisibility = (id) => {
    setShowEfirma(prev => ({
      ...prev,
      [id]: !prev[id]
    }));
  };

  useEffect(() => {
    const fetchOrganizaciones = async () => {
      try {
        const url = `${import.meta.env.VITE_EFC_API_URL}/organization/organizaciones/`;
        const res = await fetchWithAuth(url); // ← USA fetchWithAuth
        if (!res.ok) throw new Error('Error al obtener las organizaciones');
        const data = await res.json();
        setOrganizaciones(data);
      } catch (err) {
        console.error('Error fetching organizaciones:', err);
        setOrganizaciones([]); // ← Asegurar que siempre sea un array
      }
    };
    fetchOrganizaciones();
  }, []);

  // Funciones para alternar visibilidad en modal de edición
  const toggleEditPasswordVisibility = () => {
    setShowEditPassword(!showEditPassword);
  };

  const toggleEditEfirmaVisibility = () => {
    setShowEditEfirma(!showEditEfirma);
  };

  // Función helper para truncar texto largo en la tabla
  const truncateForTable = (text, maxLength = 20) => {
    if (!text || text.length <= maxLength) return text;
    const start = text.substring(0, 6);
    const end = text.substring(text.length - 6);
    return `${start}...${end}`;
  };

  // Función para copiar al portapapeles
  const copyToClipboard = async (text, fieldName) => {
    try {
      // Verificar si el texto existe
      if (!text || text.trim() === '') {
        setCopySuccess(`${fieldName} está vacío`);
        setTimeout(() => setCopySuccess(''), 2000);
        return;
      }

      // Intentar usar la Clipboard API moderna
      if (navigator.clipboard && window.isSecureContext) {
        await navigator.clipboard.writeText(text);
        setCopySuccess(`${fieldName} copiado`);
        setTimeout(() => setCopySuccess(''), 2000);
      } else {
        // Fallback para navegadores más antiguos o contextos no seguros
        const textArea = document.createElement('textarea');
        textArea.value = text;
        textArea.style.position = 'fixed';
        textArea.style.opacity = '0';
        textArea.style.pointerEvents = 'none';
        document.body.appendChild(textArea);
        textArea.focus();
        textArea.select();

        try {
          const successful = document.execCommand('copy');
          if (successful) {
            setCopySuccess(`${fieldName} copiado`);
          } else {
            setCopySuccess(`Error al copiar ${fieldName}`);
          }
        } catch (fallbackErr) {
          console.error('Error en fallback:', fallbackErr);
          setCopySuccess(`Error al copiar ${fieldName}`);
        } finally {
          document.body.removeChild(textArea);
          setTimeout(() => setCopySuccess(''), 2000);
        }
      }
    } catch (err) {
      console.error('Error al copiar:', err);
      setCopySuccess(`Error al copiar ${fieldName}`);
      setTimeout(() => setCopySuccess(''), 2000);
    }
  };

  // Handlers básicos para inputs
  const handleInputChange = e => {
    const { name, value, type, checked, files } = e.target;
    if (type === 'checkbox') {
      setForm(f => ({ ...f, [name]: checked }));
    } else if (type === 'file') {
      setForm(f => ({ ...f, [name]: files[0] }));
    } else {
      setForm(f => ({ ...f, [name]: value }));
    }
  };
  const closeModals = () => {
    setShowCreateModal(false);
    setShowEditModal(false);
    setShowDeleteModal(false);
    setForm(initialForm);
    setEditVucem(null);
    setDeleteVucem(null);
    // Resetear estados de visibilidad del modal de edición
    setShowEditPassword(false);
    setShowEditEfirma(false);
    // Resetear estados de visibilidad del modal de creación
    setShowCreatePassword(false);
    setShowCreateEfirma(false);
  };

  // Fetch list
  const fetchVucem = async () => {
    setLoading(true);
    try {
      const res = await fetchWithAuth(`${API_URL}/vucem/vucem/`);
      if (!res.ok) throw new Error('Error al cargar Ventanilla Unica');
      const data = await res.json();
      // console.log('data > ', data);
      setVucemList(data);
      setError(null);
    } catch (err) {
      setError('Error al cargar Ventanilla Unica');
    }
    setLoading(false);
  };

  // Funciones de descarga
  const downloadCertificate = async (id, usuario) => {
    try {
      const res = await fetchWithAuth(`${API_URL}/vucem/vucem/${id}/download_cer/`);

      if (!res.ok) {
        if (res.status === 404) {
          setCopySuccess('Certificado no encontrado');
          setTimeout(() => setCopySuccess(''), 2000);
          return;
        }
        throw new Error('Error al descargar certificado');
      }

      const blob = await res.blob();
      const url = window.URL.createObjectURL(blob);
      const a = document.createElement('a');
      a.style.display = 'none';
      a.href = url;
      a.download = `${usuario}_certificado.cer`;
      document.body.appendChild(a);
      a.click();
      window.URL.revokeObjectURL(url);
      document.body.removeChild(a);

      setCopySuccess('Certificado descargado');
      setTimeout(() => setCopySuccess(''), 2000);
    } catch (err) {
      console.error('Error al descargar certificado:', err);
      setCopySuccess('Error al descargar certificado');
      setTimeout(() => setCopySuccess(''), 2000);
    }
  };

  const downloadKey = async (id, usuario) => {
    try {
      const res = await fetchWithAuth(`${API_URL}/vucem/vucem/${id}/download_key/`);

      if (!res.ok) {
        if (res.status === 404) {
          setCopySuccess('Clave no encontrada');
          setTimeout(() => setCopySuccess(''), 2000);
          return;
        }
        throw new Error('Error al descargar clave');
      }

      const blob = await res.blob();
      const url = window.URL.createObjectURL(blob);
      const a = document.createElement('a');
      a.style.display = 'none';
      a.href = url;
      a.download = `${usuario}_clave.key`;
      document.body.appendChild(a);
      a.click();
      window.URL.revokeObjectURL(url);
      document.body.removeChild(a);

      setCopySuccess('Clave descargada');
      setTimeout(() => setCopySuccess(''), 2000);
    } catch (err) {
      console.error('Error al descargar clave:', err);
      setCopySuccess('Error al descargar clave');
      setTimeout(() => setCopySuccess(''), 2000);
    }
  };

  // Función para activar/desactivar credencial
  const toggleVucemStatus = async (id, currentStatus) => {
    try {
      const response = await patchWithAuth(`${API_URL}/vucem/vucem/${id}/`, {
        is_active: !currentStatus
      });

      if (!response.ok) {
        throw new Error('Error al cambiar el estado');
      }

      // Recargar la lista para reflejar los cambios
      await fetchVucem();

    } catch (err) {
      alert('Error al cambiar el estado de la credencial');
    }
  };

  useEffect(() => {
    fetchVucem();
  }, []);

  // Filtros visuales
  const [filterUsuario, setFilterUsuario] = useState('');
  const [filterPatente, setFilterPatente] = useState('');
  const filteredList = vucemList.filter(v =>
    v.usuario.toLowerCase().includes(filterUsuario.toLowerCase()) &&
    v.patente.toLowerCase().includes(filterPatente.toLowerCase())
  );

  // Paginación estilo Users.jsx
  const [page, setPage] = useState(1);
  const pageSize = 10;
  const totalPages = Math.max(1, Math.ceil(filteredList.length / pageSize));
  const paginatedList = filteredList.slice((page - 1) * pageSize, page * pageSize);

  // Reset page si cambia el filtro
  useEffect(() => { setPage(1); }, [filterUsuario, filterPatente]);

  // Cuando se selecciona un registro para editar, poblar el formulario con sus datos
  useEffect(() => {
    if (editVucem) {
      setForm({
        usuario: editVucem.usuario || '',
        password: editVucem.password || '', // Mostrar el password actual para edición
        patente: editVucem.patente || '',
        efirma: editVucem.efirma || '', // Ya estaba incluido
        key: null, // No se rellena, solo se sube si el usuario selecciona
        cer: null, // No se rellena, solo se sube si el usuario selecciona
        is_importador: !!editVucem.is_importador,
        acusecove: !!editVucem.acusecove,
        acuseedocument: !!editVucem.acuseedocument,
        is_active: !!editVucem.is_active,
      });
      // Resetear visibilidad de campos sensibles cuando se abre el modal de edición
      setShowEditPassword(false);
      setShowEditEfirma(false);
    }
  }, [editVucem]);

  // Table y header estilo Users.jsx
  return (
    <div className="p-6 max-w-7xl mx-auto">
      {/* Modal Relacionar Importadores */}
      {showRelacionarModal && selectedVucem && (
        <RelacionarImportadoresModal
          open={showRelacionarModal}
          onClose={() => setShowRelacionarModal(false)}
          vucem={selectedVucem}
        />
      )}
      {/* Header modernizado con gradientes azules */}
      <div className="mb-8 relative overflow-hidden rounded-2xl shadow-xl bg-gradient-to-br from-blue-600 via-blue-700 to-blue-800 p-6 sm:p-8">
        <div className="absolute inset-0 bg-gradient-to-br from-blue-500/20 via-transparent to-blue-900/30"></div>
        <div className="absolute -top-24 -right-24 w-48 h-48 bg-white/10 rounded-full blur-xl"></div>
        <div className="absolute -bottom-12 -left-12 w-32 h-32 bg-white/5 rounded-full blur-lg"></div>

        <div className="relative flex flex-col sm:flex-row items-start sm:items-center gap-4 sm:gap-6">
          <div className="flex-shrink-0 bg-white/20 backdrop-blur-sm rounded-2xl p-3 sm:p-4 shadow-lg animate-bounce-slow">
            <svg className="h-8 w-8 sm:h-10 sm:w-10 text-white" fill="none" stroke="currentColor" viewBox="0 0 24 24">
              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M9 12l2 2 4-4m5.618-4.016A11.955 11.955 0 0112 2.944a11.955 11.955 0 01-8.618 3.04A12.02 12.02 0 003 9c0 5.591 3.824 10.29 9 11.622 5.176-1.332 9-6.03 9-11.622 0-1.042-.133-2.052-.382-3.016z" />
            </svg>
          </div>
          <div className="flex-1 min-w-0">
            <div className="flex flex-col sm:flex-row sm:items-center gap-2 sm:gap-3 mb-2">
              <h1 className="text-2xl sm:text-3xl lg:text-4xl font-bold text-white tracking-tight">
                Credenciales VU
              </h1>
              <div className="flex flex-wrap gap-2">
                <span className="inline-flex items-center px-2.5 py-1 rounded-full text-xs font-semibold bg-white/20 text-white backdrop-blur-sm animate-fade-in">
                  <svg className="w-3 h-3 mr-1" fill="currentColor" viewBox="0 0 20 20">
                    <path fillRule="evenodd" d="M3 4a1 1 0 011-1h12a1 1 0 011 1v2a1 1 0 01-1 1H4a1 1 0 01-1-1V4zm0 4a1 1 0 011-1h6a1 1 0 011 1v6a1 1 0 01-1 1H4a1 1 0 01-1-1V8zm8 0a1 1 0 011-1h6a1 1 0 011 1v2a1 1 0 01-1 1h-6a1 1 0 01-1-1V8z" clipRule="evenodd" />
                  </svg>
                  {vucemList.length} Total
                </span>
                <span className="inline-flex items-center px-2.5 py-1 rounded-full text-xs font-semibold bg-green-500/20 text-green-100 backdrop-blur-sm animate-fade-in" style={{ animationDelay: '0.1s' }}>
                  <svg className="w-3 h-3 mr-1" fill="currentColor" viewBox="0 0 20 20">
                    <path fillRule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z" clipRule="evenodd" />
                  </svg>
                  {vucemList.filter(v => v.is_active).length} Activos
                </span>
              </div>
            </div>
            <p className="text-blue-100 text-sm sm:text-base font-medium">
              Gestiona certificados digitales, credenciales y configuraciones Ventanilla Unica del sistema aduanero
            </p>
          </div>
        </div>
      </div>
      <style>{`
        @keyframes bounce-slow {
          0%, 100% { transform: translateY(0); }
          50% { transform: translateY(-8px); }
        }
        .animate-bounce-slow {
          animation: bounce-slow 2.2s infinite;
        }
        @keyframes fade-in {
          from { opacity: 0; transform: scale(0.9); }
          to { opacity: 1; transform: scale(1); }
        }
        .animate-fade-in {
          animation: fade-in 0.7s ease;
        }
        @keyframes fade-in-up {
          from { opacity: 0; transform: translateY(10px); }
          to { opacity: 1; transform: translateY(0); }
        }
        .fade-in-up-users {
          animation: fade-in-up 0.4s ease forwards;
          opacity: 0;
        }
      `}</style>

      {/* Mensaje de éxito para copiar */}
      {copySuccess && (
        <div className="fixed top-4 right-4 bg-green-500 text-white px-4 py-2 rounded-lg shadow-lg z-50 flex items-center space-x-2 animate-fade-in">
          <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M5 13l4 4L19 7" />
          </svg>
          <span>{copySuccess}</span>
        </div>
      )}

      {/* Controles de búsqueda y filtros mejorados */}
      <div className="bg-white shadow-lg rounded-xl border border-gray-100 mb-6 overflow-hidden">
        <div className="bg-gradient-to-r from-gray-50 to-blue-50 px-4 sm:px-6 py-4 border-b border-gray-200">
          <div className="flex flex-col lg:flex-row lg:items-center lg:justify-between gap-4">
            {/* Búsqueda principal */}
            <div className="flex-1 max-w-md">
              <div className="relative">
                <div className="absolute inset-y-0 left-0 pl-3 flex items-center pointer-events-none">
                  <svg className="h-5 w-5 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M21 21l-6-6m2-5a7 7 0 11-14 0 7 7 0 0114 0z" />
                  </svg>
                </div>
                <input
                  type="text"
                  className="block w-full pl-10 pr-10 py-3 border border-gray-300 rounded-lg bg-white placeholder-gray-500 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-blue-500 text-sm transition-all duration-200 shadow-sm"
                  placeholder="Buscar por usuario o patente..."
                  value={filterUsuario}
                  onChange={e => setFilterUsuario(e.target.value)}
                  autoComplete="off"
                />
                {filterUsuario && (
                  <div className="absolute inset-y-0 right-0 pr-3 flex items-center">
                    <button
                      onClick={() => setFilterUsuario('')}
                      className="text-gray-400 hover:text-gray-600 transition-colors p-1 rounded-full hover:bg-gray-100"
                      title="Limpiar búsqueda"
                    >
                      <svg className="h-4 w-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M6 18L18 6M6 6l12 12" />
                      </svg>
                    </button>
                  </div>
                )}
              </div>
            </div>

            {/* Información y botón crear */}
            <div className="flex flex-col sm:flex-row items-start sm:items-center gap-3">
              {filteredList.length !== vucemList.length && (
                <div className="text-sm text-blue-700">
                  <span className="inline-flex items-center">
                    <svg className="w-4 h-4 mr-1" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                      <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M3 4a1 1 0 011-1h12a1 1 0 011 1v2a1 1 0 01-1 1H4a1 1 0 01-1-1V4zm0 4a1 1 0 011-1h6a1 1 0 011 1v6a1 1 0 01-1 1H4a1 1 0 01-1-1V8zm8 0a1 1 0 011-1h6a1 1 0 011 1v2a1 1 0 01-1 1h-6a1 1 0 01-1-1V8z" />
                    </svg>
                    Mostrando {filteredList.length} de {vucemList.length} registros
                    {filterUsuario && <span className="ml-1">para "{filterUsuario}"</span>}
                  </span>
                </div>
              )}
              <button
                onClick={() => setShowCreateModal(true)}
                type="button"
                className="inline-flex items-center px-4 py-2.5 border border-transparent rounded-lg shadow-sm text-sm font-medium text-white bg-gradient-to-r from-blue-600 to-blue-700 hover:from-blue-700 hover:to-blue-800 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500 transition-all duration-200 transform hover:scale-105"
              >
                <svg className="w-4 h-4 mr-2" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M12 6v6m0 0v6m0-6h6m-6 0H6" />
                </svg>
                Agregar Credencial
              </button>
            </div>
          </div>
        </div>
        {/* Vista responsiva: tabla para desktop, cards para mobile */}

        {/* Tabla para pantallas grandes */}
        <div className="hidden lg:block bg-white shadow-lg rounded-xl overflow-hidden border border-gray-100">
          <div style={{ minHeight: 'calc(8 * 56px)', maxHeight: 'calc(8 * 56px)', overflowY: 'auto', position: 'relative' }}>
            <table className="min-w-full divide-y divide-gray-200">
              <thead className="bg-gradient-to-r from-gray-50 to-blue-50 sticky top-0 z-20">
                <tr>
                  <th scope="col" className="px-6 py-3 text-left text-xs font-bold text-blue-700 uppercase tracking-wider">Usuario</th>
                  <th scope="col" className="px-6 py-3 text-left text-xs font-bold text-blue-700 uppercase tracking-wider">Password</th>
                  <th scope="col" className="px-6 py-3 text-left text-xs font-bold text-blue-700 uppercase tracking-wider">e.firma</th>
                  <th scope="col" className="px-6 py-3 text-left text-xs font-bold text-blue-700 uppercase tracking-wider">Archivos</th>
                  <th scope="col" className="px-6 py-3 text-center text-xs font-bold text-blue-700 uppercase tracking-wider">Estado</th>
                  <th scope="col" className="px-6 py-3 text-center text-xs font-bold text-blue-700 uppercase tracking-wider">Acciones</th>
                </tr>
              </thead>
              <tbody className="bg-white divide-y divide-gray-200" style={{ position: 'relative', minHeight: 'calc(8 * 56px)' }}>
                {loading ? (
                  <tr>
                    <td colSpan={6} style={{ height: 'calc(8 * 56px)', padding: 0 }}>
                      <div className="flex items-center justify-center h-full w-full absolute left-0 top-0" style={{ minHeight: 'calc(8 * 56px)', background: 'rgba(255,255,255,0.7)', zIndex: 10 }}>
                        <div className="text-center">
                          <div className="animate-spin rounded-full h-12 w-12 border-b-2 border-blue-600 mx-auto mb-4"></div>
                          <span className="text-gray-500 text-lg">Cargando registros Ventanilla Unica...</span>
                        </div>
                      </div>
                    </td>
                  </tr>
                ) : error ? (
                  <tr>
                    <td colSpan={6} style={{ height: 'calc(8 * 56px)', padding: 0 }}>
                      <div className="flex items-center justify-center h-full w-full absolute left-0 top-0" style={{ minHeight: 'calc(8 * 56px)', background: 'rgba(255,255,255,0.7)', zIndex: 10 }}>
                        <div className="text-center">
                          <div className="mx-auto h-12 w-12 bg-red-100 rounded-full flex items-center justify-center mb-4">
                            <svg className="h-6 w-6 text-red-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M12 8v4m0 4h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z" />
                            </svg>
                          </div>
                          <span className="text-red-600 text-lg">Error: {error}</span>
                        </div>
                      </div>
                    </td>
                  </tr>
                ) : paginatedList.length > 0 ? (
                  <>
                    {paginatedList.map((vucem, idx) => (
                      <tr
                        key={vucem.id}
                        className={
                          `transition-all duration-300 hover:scale-[1.015] hover:shadow-md hover:bg-blue-50 fade-in-up-users` +
                          (idx % 2 === 0 ? ' bg-white' : ' bg-gray-50')
                        }
                        style={{ animationDelay: `${0.05 * idx}s` }}
                      >
                        <td className="px-6 py-4 whitespace-nowrap">
                          <div className="flex items-center">
                            <div className="ml-4">
                              <div className="text-sm font-medium text-gray-900">{vucem.usuario}</div>
                              <div className="text-sm text-gray-500">Patente: {vucem.patente}</div>
                            </div>
                          </div>
                        </td>
                        <td className="px-6 py-4 whitespace-nowrap">
                          <div className="flex items-center space-x-2">
                            <span className="text-sm text-gray-600 font-mono">
                              {showPassword[vucem.id] ? truncateForTable(vucem.password) || '(vacío)' : '••••••••'}
                            </span>
                            <button
                              onClick={() => togglePasswordVisibility(vucem.id)}
                              className="inline-flex items-center p-1 border border-gray-300 shadow-sm text-xs font-medium rounded text-gray-700 bg-white hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500 transition-all duration-200"
                              title={showPassword[vucem.id] ? "Ocultar password" : "Mostrar password"}
                            >
                              {showPassword[vucem.id] ? (
                                <svg className="w-3 h-3" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M13.875 18.825A10.05 10.05 0 0112 19c-4.478 0-8.268-2.943-9.543-7a9.97 9.97 0 011.563-3.029m5.858.908a3 3 0 114.243 4.243M9.878 9.878l4.242 4.242M9.878 9.878L3 3m6.878 6.878L21 21" />
                                </svg>
                              ) : (
                                <svg className="w-3 h-3" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" />
                                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M2.458 12C3.732 7.943 7.523 5 12 5c4.478 0 8.268 2.943 9.542 7-1.274 4.057-5.064 7-9.542 7-4.477 0-8.268-2.943-9.542-7z" />
                                </svg>
                              )}
                            </button>
                            <button
                              onClick={() => copyToClipboard(vucem.password || '', 'Password')}
                              className="inline-flex items-center p-1 border border-gray-300 shadow-sm text-xs font-medium rounded text-gray-700 bg-white hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500 transition-all duration-200"
                              title="Copiar password"
                            >
                              <svg className="w-3 h-3" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M8 16H6a2 2 0 01-2-2V6a2 2 0 012-2h8a2 2 0 012 2v2m-6 12h8a2 2 0 002-2v-8a2 2 0 00-2-2h-8a2 2 0 00-2 2v8a2 2 0 002 2z" />
                              </svg>
                            </button>
                          </div>
                        </td>
                        <td className="px-6 py-4 whitespace-nowrap">
                          <div className="flex items-center space-x-2">
                            <span className="text-sm text-gray-600 font-mono">
                              {showEfirma[vucem.id] ? truncateForTable(vucem.efirma) || '(vacío)' : '••••••••'}
                            </span>
                            <button
                              onClick={() => toggleEfirmaVisibility(vucem.id)}
                              className="inline-flex items-center p-1 border border-gray-300 shadow-sm text-xs font-medium rounded text-gray-700 bg-white hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500 transition-all duration-200"
                              title={showEfirma[vucem.id] ? "Ocultar e.firma" : "Mostrar e.firma"}
                            >
                              {showEfirma[vucem.id] ? (
                                <svg className="w-3 h-3" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M13.875 18.825A10.05 10.05 0 0112 19c-4.478 0-8.268-2.943-9.543-7a9.97 9.97 0 011.563-3.029m5.858.908a3 3 0 114.243 4.243M9.878 9.878l4.242 4.242M9.878 9.878L3 3m6.878 6.878L21 21" />
                                </svg>
                              ) : (
                                <svg className="w-3 h-3" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" />
                                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M2.458 12C3.732 7.943 7.523 5 12 5c4.478 0 8.268 2.943 9.542 7-1.274 4.057-5.064 7-9.542 7-4.477 0-8.268-2.943-9.542-7z" />
                                </svg>
                              )}
                            </button>
                            <button
                              onClick={() => copyToClipboard(vucem.efirma || '', 'e.firma')}
                              className="inline-flex items-center p-1 border border-gray-300 shadow-sm text-xs font-medium rounded text-gray-700 bg-white hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500 transition-all duration-200"
                              title="Copiar e.firma"
                            >
                              <svg className="w-3 h-3" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M8 16H6a2 2 0 01-2-2V6a2 2 0 012-2h8a2 2 0 012 2v2m-6 12h8a2 2 0 002-2v-8a2 2 0 00-2-2h-8a2 2 0 00-2 2v8a2 2 0 002 2z" />
                              </svg>
                            </button>
                          </div>
                        </td>
                        <td className="px-6 py-4 whitespace-nowrap">
                          <div className="flex flex-col gap-1">
                            {vucem.key ? (
                              <div className="flex items-center gap-2">
                                <span className="inline-flex items-center px-2.5 py-0.5 rounded-full text-xs font-medium bg-blue-100 text-blue-800">
                                  <svg className="w-3 h-3 mr-1" fill="currentColor" viewBox="0 0 20 20">
                                    <path fillRule="evenodd" d="M16.707 7.293a1 1 0 00-1.414 0L9 13.586l-2.293-2.293a1 1 0 00-1.414 1.414l3 3a1 1 0 001.414 0l7-7a1 1 0 000-1.414z" clipRule="evenodd" />
                                  </svg>
                                  Key
                                </span>
                                <button
                                  onClick={() => downloadKey(vucem.id, vucem.usuario)}
                                  className="inline-flex items-center p-1 border border-blue-300 shadow-sm text-xs font-medium rounded text-blue-700 bg-white hover:bg-blue-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500 transition-all duration-200"
                                  title="Descargar Key"
                                >
                                  <svg className="w-3 h-3" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M12 10v6m0 0l-3-3m3 3l3-3m2 8H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z" />
                                  </svg>
                                </button>
                              </div>
                            ) : (
                              <span className="inline-flex items-center px-2.5 py-0.5 rounded-full text-xs font-medium bg-gray-100 text-gray-500">
                                <svg className="w-3 h-3 mr-1" fill="currentColor" viewBox="0 0 20 20">
                                  <path fillRule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zM8.707 7.293a1 1 0 00-1.414 1.414L8.586 10l-1.293 1.293a1 1 0 101.414 1.414L10 11.414l1.293 1.293a1 1 0 001.414-1.414L11.414 10l1.293-1.293a1 1 0 00-1.414-1.414L10 8.586 8.707 7.293z" clipRule="evenodd" />
                                </svg>
                                Sin Key
                              </span>
                            )}
                            {vucem.cer ? (
                              <div className="flex items-center gap-2">
                                <span className="inline-flex items-center px-2.5 py-0.5 rounded-full text-xs font-medium bg-green-100 text-green-800">
                                  <svg className="w-3 h-3 mr-1" fill="currentColor" viewBox="0 0 20 20">
                                    <path fillRule="evenodd" d="M16.707 7.293a1 1 0 00-1.414 0L9 13.586l-2.293-2.293a1 1 0 00-1.414 1.414l3 3a1 1 0 001.414 0l7-7a1 1 0 000-1.414z" clipRule="evenodd" />
                                  </svg>
                                  Cer
                                </span>
                                <button
                                  onClick={() => downloadCertificate(vucem.id, vucem.usuario)}
                                  className="inline-flex items-center p-1 border border-green-300 shadow-sm text-xs font-medium rounded text-green-700 bg-white hover:bg-green-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-green-500 transition-all duration-200"
                                  title="Descargar Certificado"
                                >
                                  <svg className="w-3 h-3" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M12 10v6m0 0l-3-3m3 3l3-3m2 8H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z" />
                                  </svg>
                                </button>
                              </div>
                            ) : (
                              <span className="inline-flex items-center px-2.5 py-0.5 rounded-full text-xs font-medium bg-gray-100 text-gray-500">
                                <svg className="w-3 h-3 mr-1" fill="currentColor" viewBox="0 0 20 20">
                                  <path fillRule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zM8.707 7.293a1 1 0 00-1.414 1.414L8.586 10l-1.293 1.293a1 1 0 101.414 1.414L10 11.414l1.293 1.293a1 1 0 001.414-1.414L11.414 10l1.293-1.293a1 1 0 00-1.414-1.414L10 8.586 8.707 7.293z" clipRule="evenodd" />
                                </svg>
                                Sin Cer
                              </span>
                            )}
                          </div>
                        </td>
                        <td className="px-6 py-4 whitespace-nowrap text-center">
                          <div className="flex flex-col items-center gap-1">
                            {vucem.is_active ? (
                              <span className="inline-flex items-center px-2.5 py-0.5 rounded-full text-xs font-medium bg-green-100 text-green-800">
                                <svg className="w-3 h-3 mr-1" fill="currentColor" viewBox="0 0 20 20">
                                  <path fillRule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z" clipRule="evenodd" />
                                </svg>
                                Activo
                              </span>
                            ) : (
                              <span className="inline-flex items-center px-2.5 py-0.5 rounded-full text-xs font-medium bg-red-100 text-red-800">
                                <svg className="w-3 h-3 mr-1" fill="currentColor" viewBox="0 0 20 20">
                                  <path fillRule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zM8.707 7.293a1 1 0 00-1.414 1.414L8.586 10l-1.293 1.293a1 1 0 101.414 1.414L10 11.414l1.293 1.293a1 1 0 001.414-1.414L11.414 10l1.293-1.293a1 1 0 00-1.414-1.414L10 8.586 8.707 7.293z" clipRule="evenodd" />
                                </svg>
                                Inactivo
                              </span>
                            )}
                            {vucem.is_importador && (
                              <span className="inline-flex items-center px-2.5 py-0.5 rounded-full text-xs font-medium bg-purple-100 text-purple-800">
                                <svg className="w-3 h-3 mr-1" fill="currentColor" viewBox="0 0 20 20">
                                  <path fillRule="evenodd" d="M9.504 1.132a1 1 0 01.992 0l1.75 1a1 1 0 11-.992 1.736L10 3.152l-1.254.716a1 1 0 11-.992-1.736l1.75-1z" clipRule="evenodd" />
                                </svg>
                                Importador
                              </span>
                            )}
                          </div>
                        </td>
                        <td className="px-6 py-4 whitespace-nowrap text-center">
                          <div className="flex justify-center space-x-2">
                            <button
                              onClick={() => {
                                setSelectedVucem(vucem);
                                setShowRelacionarModal(true);
                              }}
                              className="inline-flex items-center p-1 border border-purple-300 shadow-sm rounded text-purple-600 bg-white hover:bg-purple-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-purple-200 transition-all duration-200"
                              title="Relacionar importadores"
                            >
                              <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M12 4v16m8-8H4" />
                              </svg>
                            </button>
                            <button
                              onClick={() => { setEditVucem(vucem); setShowEditModal(true); }}
                              className="inline-flex items-center p-2 border border-blue-300 shadow-sm font-medium rounded-lg text-blue-700 bg-white hover:bg-blue-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500 transition-all duration-200 transform hover:scale-105"
                              title="Editar"
                            >
                              <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M11 5H6a2 2 0 00-2 2v11a2 2 0 002 2h11a2 2 0 002-2v-5m-1.414-9.414a2 2 0 112.828 2.828L11.828 15H9v-2.828l8.586-8.586z" />
                              </svg>
                            </button>
                            <button
                              onClick={() => toggleVucemStatus(vucem.id, vucem.is_active)}
                              className={`inline-flex items-center p-2 border shadow-sm font-medium rounded-lg bg-white focus:outline-none focus:ring-2 focus:ring-offset-2 transition-all duration-200 transform hover:scale-105 ${vucem.is_active
                                ? 'border-orange-300 text-orange-700 hover:bg-orange-50 focus:ring-orange-500'
                                : 'border-green-300 text-green-700 hover:bg-green-50 focus:ring-green-500'
                                }`}
                              title={vucem.is_active ? "Desactivar" : "Activar"}
                            >
                              {vucem.is_active ? (
                                <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M18.364 18.364A9 9 0 005.636 5.636m12.728 12.728L5.636 5.636m12.728 12.728L5.636 5.636" />
                                </svg>
                              ) : (
                                <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z" />
                                </svg>
                              )}
                            </button>
                            <button
                              onClick={() => { setDeleteVucem(vucem); setShowDeleteModal(true); }}
                              className="inline-flex items-center p-2 border border-red-300 shadow-sm font-medium rounded-lg text-red-700 bg-white hover:bg-red-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-red-500 transition-all duration-200 transform hover:scale-105"
                              title="Eliminar"
                            >
                              <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M19 7l-.867 12.142A2 2 0 0116.138 21H7.862a2 2 0 01-1.995-1.858L5 7m5 4v6m4-6v6m1-10V4a1 1 0 00-1-1h-4a1 1 0 00-1 1v3M4 7h16" />
                              </svg>
                            </button>
                          </div>
                        </td>
                      </tr>
                    ))}
                    {/* Rellenar con filas vacías si hay menos de 8 */}
                    {paginatedList.length < 8 && !loading && !error && Array.from({ length: 8 - paginatedList.length }).map((_, idx) => (
                      <tr key={`empty-${idx}`}>
                        <td className="px-6 py-4 whitespace-nowrap" colSpan={6}>&nbsp;</td>
                      </tr>
                    ))}
                  </>
                ) : (
                  <tr>
                    <td colSpan={6} style={{ height: 'calc(8 * 56px)', padding: 0 }}>
                      <div className="flex flex-col items-center justify-center h-full w-full absolute left-0 top-0" style={{ minHeight: 'calc(8 * 56px)', background: 'rgba(255,255,255,0.7)', zIndex: 10 }}>
                        <div className="mx-auto h-16 w-16 bg-gray-100 rounded-full flex items-center justify-center mb-4">
                          <svg className="h-8 w-8 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M9 12l2 2 4-4m5.618-4.016A11.955 11.955 0 0112 2.944a11.955 11.955 0 01-8.618 3.04A12.02 12.02 0 003 9c0 5.591 3.824 10.29 9 11.622 5.176-1.332 9-6.03 9-11.622 0-1.042-.133-2.052-.382-3.016z" />
                          </svg>
                        </div>
                        <h3 className="text-lg font-medium text-gray-900 mb-2">No hay registros</h3>
                        <p className="text-gray-500">Comienza creando tu primer registro de Ventanilla Unica.</p>
                      </div>
                    </td>
                  </tr>
                )}
              </tbody>
            </table>
          </div>
        </div>
        {/* Cards para pantallas pequeñas */}
        <div className="lg:hidden">
          {loading ? (
            <div className="flex items-center justify-center py-12">
              <div className="text-center">
                <div className="animate-spin rounded-full h-12 w-12 border-b-2 border-blue-600 mx-auto mb-4"></div>
                <span className="text-gray-500 text-lg">Cargando registros...</span>
              </div>
            </div>
          ) : error ? (
            <div className="flex items-center justify-center py-12">
              <div className="text-center">
                <div className="mx-auto h-12 w-12 bg-red-100 rounded-full flex items-center justify-center mb-4">
                  <svg className="h-6 w-6 text-red-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M12 8v4m0 4h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z" />
                  </svg>
                </div>
                <span className="text-red-600 text-lg">Error: {error}</span>
              </div>
            </div>
          ) : paginatedList.length > 0 ? (
            <div className="space-y-4">
              {paginatedList.map((vucem, idx) => (
                <div key={vucem.id} className="bg-white border border-gray-200 rounded-xl p-4 shadow-sm hover:shadow-md transition-all duration-300 hover:scale-[1.02] fade-in-up-users" style={{ animationDelay: `${0.05 * idx}s` }}>
                  <div className="flex items-start justify-between mb-3">
                    <div className="flex items-center space-x-3 flex-1">
                      <div className="flex-1 min-w-0">
                        <h3 className="text-sm font-semibold text-gray-900 truncate">{vucem.usuario}</h3>
                        <p className="text-xs text-gray-500 truncate">Patente: {vucem.patente}</p>
                      </div>
                    </div>
                    <div className="flex flex-col gap-2">
                      <button
                        onClick={() => {
                                setSelectedVucem(vucem);
                                setShowRelacionarModal(true);
                              }}
                        className="inline-flex items-center justify-center p-2 border border-purple-300 shadow-sm font-medium rounded-lg text-purple-700 bg-white hover:bg-purple-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-purple-500 transition-all duration-200"
                        title="Relacionar importadores"
                      >
                        <svg className="w-4 h-4 mr-1" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                          <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M12 4v16m8-8H4" />
                        </svg>
                        <span className="hidden sm:inline text-xs">Relacionar</span>
                      </button>
                      <button
                        onClick={() => { setEditVucem(vucem); setShowEditModal(true); }}
                        className="inline-flex items-center justify-center p-2 border border-blue-300 shadow-sm font-medium rounded-lg text-blue-700 bg-white hover:bg-blue-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500 transition-all duration-200"
                        title="Editar"
                      >
                        <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                          <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M11 5H6a2 2 0 00-2 2v11a2 2 0 002 2h11a2 2 0 002-2v-5m-1.414-9.414a2 2 0 112.828 2.828L11.828 15H9v-2.828l8.586-8.586z" />
                        </svg>
                      </button>

                      <button
                        onClick={() => toggleVucemStatus(vucem.id, vucem.is_active)}
                        className={`inline-flex items-center justify-center p-2 border shadow-sm font-medium rounded-lg bg-white focus:outline-none focus:ring-2 focus:ring-offset-2 transition-all duration-200 ${vucem.is_active
                          ? 'border-orange-300 text-orange-700 hover:bg-orange-50 focus:ring-orange-500'
                          : 'border-green-300 text-green-700 hover:bg-green-50 focus:ring-green-500'
                          }`}
                        title={vucem.is_active ? "Desactivar" : "Activar"}
                      >
                        {vucem.is_active ? (
                          <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M18.364 18.364A9 9 0 005.636 5.636m12.728 12.728L5.636 5.636m12.728 12.728L5.636 5.636" />
                          </svg>
                        ) : (
                          <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z" />
                          </svg>
                        )}
                      </button>
                      <button
                        onClick={() => { setDeleteVucem(vucem); setShowDeleteModal(true); }}
                        className="inline-flex items-center justify-center p-2 border border-red-300 shadow-sm font-medium rounded-lg text-red-700 bg-white hover:bg-red-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-red-500 transition-all duration-200"
                        title="Eliminar"
                      >
                        <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                          <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M19 7l-.867 12.142A2 2 0 0116.138 21H7.862a2 2 0 01-1.995-1.858L5 7m5 4v6m4-6v6m1-10V4a1 1 0 00-1-1h-4a1 1 0 00-1 1v3M4 7h16" />
                        </svg>
                      </button>
                    </div>
                  </div>
                  <div className="grid grid-cols-2 gap-4 text-xs">
                    <div>
                      <span className="font-medium text-gray-500">Password:</span>
                      <div className="mt-1 flex items-center space-x-2">
                        <span className="text-gray-600 font-mono">
                          {showPassword[vucem.id] ? truncateForTable(vucem.password) || '(vacío)' : '••••••••'}
                        </span>
                        <button
                          onClick={() => togglePasswordVisibility(vucem.id)}
                          className="inline-flex items-center p-1 border border-gray-300 shadow-sm text-xs font-medium rounded text-gray-700 bg-white hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500 transition-all duration-200"
                          title={showPassword[vucem.id] ? "Ocultar password" : "Mostrar password"}
                        >
                          {showPassword[vucem.id] ? (
                            <svg className="w-3 h-3" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M13.875 18.825A10.05 10.05 0 0112 19c-4.478 0-8.268-2.943-9.543-7a9.97 9.97 0 011.563-3.029m5.858.908a3 3 0 114.243 4.243M9.878 9.878l4.242 4.242M9.878 9.878L3 3m6.878 6.878L21 21" />
                            </svg>
                          ) : (
                            <svg className="w-3 h-3" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" />
                              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M2.458 12C3.732 7.943 7.523 5 12 5c4.478 0 8.268 2.943 9.542 7-1.274 4.057-5.064 7-9.542 7-4.477 0-8.268-2.943-9.542-7z" />
                            </svg>
                          )}
                        </button>
                        <button
                          onClick={() => copyToClipboard(vucem.password || '', 'Password')}
                          className="inline-flex items-center p-1 border border-gray-300 shadow-sm text-xs font-medium rounded text-gray-700 bg-white hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500 transition-all duration-200"
                          title="Copiar password"
                        >
                          <svg className="w-3 h-3" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M8 16H6a2 2 0 01-2-2V6a2 2 0 012-2h8a2 2 0 012 2v2m-6 12h8a2 2 0 002-2v-8a2 2 0 00-2-2h-8a2 2 0 00-2 2v8a2 2 0 002 2z" />
                          </svg>
                        </button>
                      </div>
                    </div>
                    <div>
                      <span className="font-medium text-gray-500">e.firma:</span>
                      <div className="mt-1 flex items-center space-x-2">
                        <span className="text-gray-600 font-mono">
                          {showEfirma[vucem.id] ? truncateForTable(vucem.efirma) || '(vacío)' : '••••••••'}
                        </span>
                        <button
                          onClick={() => toggleEfirmaVisibility(vucem.id)}
                          className="inline-flex items-center p-1 border border-gray-300 shadow-sm text-xs font-medium rounded text-gray-700 bg-white hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500 transition-all duration-200"
                          title={showEfirma[vucem.id] ? "Ocultar e.firma" : "Mostrar e.firma"}
                        >
                          {showEfirma[vucem.id] ? (
                            <svg className="w-3 h-3" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M13.875 18.825A10.05 10.05 0 0112 19c-4.478 0-8.268-2.943-9.543-7a9.97 9.97 0 011.563-3.029m5.858.908a3 3 0 114.243 4.243M9.878 9.878l4.242 4.242M9.878 9.878L3 3m6.878 6.878L21 21" />
                            </svg>
                          ) : (
                            <svg className="w-3 h-3" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" />
                              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M2.458 12C3.732 7.943 7.523 5 12 5c4.478 0 8.268 2.943 9.542 7-1.274 4.057-5.064 7-9.542 7-4.477 0-8.268-2.943-9.542-7z" />
                            </svg>
                          )}
                        </button>
                        <button
                          onClick={() => copyToClipboard(vucem.efirma || '', 'e.firma')}
                          className="inline-flex items-center p-1 border border-gray-300 shadow-sm text-xs font-medium rounded text-gray-700 bg-white hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500 transition-all duration-200"
                          title="Copiar e.firma"
                        >
                          <svg className="w-3 h-3" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M8 16H6a2 2 0 01-2-2V6a2 2 0 012-2h8a2 2 0 012 2v2m-6 12h8a2 2 0 002-2v-8a2 2 0 00-2-2h-8a2 2 0 00-2 2v8a2 2 0 002 2z" />
                          </svg>
                        </button>
                      </div>
                    </div>
                    <div>
                      <span className="font-medium text-gray-500">Estado:</span>
                      <div className="mt-1 flex flex-wrap gap-1">
                        {vucem.is_active ? (
                          <span className="inline-flex items-center px-2 py-0.5 rounded-full text-xs font-medium bg-green-100 text-green-800">
                            <svg className="w-2 h-2 mr-1" fill="currentColor" viewBox="0 0 20 20">
                              <path fillRule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z" clipRule="evenodd" />
                            </svg>
                            Activo
                          </span>
                        ) : (
                          <span className="inline-flex items-center px-2 py-0.5 rounded-full text-xs font-medium bg-red-100 text-red-800">
                            <svg className="w-2 h-2 mr-1" fill="currentColor" viewBox="0 0 20 20">
                              <path fillRule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zM8.707 7.293a1 1 0 00-1.414 1.414L8.586 10l-1.293 1.293a1 1 0 101.414 1.414L10 11.414l1.293 1.293a1 1 0 001.414-1.414L11.414 10l1.293-1.293a1 1 0 00-1.414-1.414L10 8.586 8.707 7.293z" clipRule="evenodd" />
                            </svg>
                            Inactivo
                          </span>
                        )}
                        {vucem.is_importador && (
                          <span className="inline-flex items-center px-2 py-0.5 rounded-full text-xs font-medium bg-purple-100 text-purple-800">
                            <svg className="w-2 h-2 mr-1" fill="currentColor" viewBox="0 0 20 20">
                              <path fillRule="evenodd" d="M9.504 1.132a1 1 0 01.992 0l1.75 1a1 1 0 11-.992 1.736L10 3.152l-1.254.716a1 1 0 11-.992-1.736l1.75-1z" clipRule="evenodd" />
                            </svg>
                            Importador
                          </span>
                        )}
                      </div>
                    </div>
                    <div className="col-span-2">
                      <span className="font-medium text-gray-500">Archivos:</span>
                      <div className="mt-1 flex flex-wrap gap-2">
                        {vucem.key ? (
                          <div className="flex items-center gap-1">
                            <span className="inline-flex items-center px-2 py-0.5 rounded-full text-xs font-medium bg-blue-100 text-blue-800">
                              <svg className="w-2 h-2 mr-1" fill="currentColor" viewBox="0 0 20 20">
                                <path fillRule="evenodd" d="M16.707 7.293a1 1 0 00-1.414 0L9 13.586l-2.293-2.293a1 1 0 00-1.414 1.414l3 3a1 1 0 001.414 0l7-7a1 1 0 000-1.414z" clipRule="evenodd" />
                              </svg>
                              Key
                            </span>
                            <button
                              onClick={() => downloadKey(vucem.id, vucem.usuario)}
                              className="inline-flex items-center p-1 border border-blue-300 shadow-sm text-xs font-medium rounded text-blue-700 bg-white hover:bg-blue-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500 transition-all duration-200"
                              title="Descargar Key"
                            >
                              <svg className="w-3 h-3" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M12 10v6m0 0l-3-3m3 3l3-3m2 8H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z" />
                              </svg>
                            </button>
                          </div>
                        ) : (
                          <span className="inline-flex items-center px-2 py-0.5 rounded-full text-xs font-medium bg-gray-100 text-gray-500">
                            <svg className="w-2 h-2 mr-1" fill="currentColor" viewBox="0 0 20 20">
                              <path fillRule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zM8.707 7.293a1 1 0 00-1.414 1.414L8.586 10l-1.293 1.293a1 1 0 101.414 1.414L10 11.414l1.293 1.293a1 1 0 001.414-1.414L11.414 10l1.293-1.293a1 1 0 00-1.414-1.414L10 8.586 8.707 7.293z" clipRule="evenodd" />
                            </svg>
                            Sin Key
                          </span>
                        )}
                        {vucem.cer ? (
                          <div className="flex items-center gap-1">
                            <span className="inline-flex items-center px-2 py-0.5 rounded-full text-xs font-medium bg-green-100 text-green-800">
                              <svg className="w-2 h-2 mr-1" fill="currentColor" viewBox="0 0 20 20">
                                <path fillRule="evenodd" d="M16.707 7.293a1 1 0 00-1.414 0L9 13.586l-2.293-2.293a1 1 0 00-1.414 1.414l3 3a1 1 0 001.414 0l7-7a1 1 0 000-1.414z" clipRule="evenodd" />
                              </svg>
                              Cer
                            </span>
                            <button
                              onClick={() => downloadCertificate(vucem.id, vucem.usuario)}
                              className="inline-flex items-center p-1 border border-green-300 shadow-sm text-xs font-medium rounded text-green-700 bg-white hover:bg-green-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-green-500 transition-all duration-200"
                              title="Descargar Certificado"
                            >
                              <svg className="w-3 h-3" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M12 10v6m0 0l-3-3m3 3l3-3m2 8H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z" />
                              </svg>
                            </button>
                          </div>
                        ) : (
                          <span className="inline-flex items-center px-2 py-0.5 rounded-full text-xs font-medium bg-gray-100 text-gray-500">
                            <svg className="w-2 h-2 mr-1" fill="currentColor" viewBox="0 0 20 20">
                              <path fillRule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zM8.707 7.293a1 1 0 00-1.414 1.414L8.586 10l-1.293 1.293a1 1 0 101.414 1.414L10 11.414l1.293 1.293a1 1 0 001.414-1.414L11.414 10l1.293-1.293a1 1 0 00-1.414-1.414L10 8.586 8.707 7.293z" clipRule="evenodd" />
                            </svg>
                            Sin Cer
                          </span>
                        )}
                      </div>
                    </div>
                  </div>
                </div>
              ))}
            </div>
          ) : (
            <div className="flex flex-col items-center justify-center py-12">
              <div className="mx-auto h-16 w-16 bg-gray-100 rounded-full flex items-center justify-center mb-4">
                <svg className="h-8 w-8 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M9 12l2 2 4-4m5.618-4.016A11.955 11.955 0 0112 2.944a11.955 11.955 0 01-8.618 3.04A12.02 12.02 0 003 9c0 5.591 3.824 10.29 9 11.622 5.176-1.332 9-6.03 9-11.622 0-1.042-.133-2.052-.382-3.016z" />
                </svg>
              </div>
              <h3 className="text-lg font-medium text-gray-900 mb-2">No hay registros</h3>
              <p className="text-gray-500 text-center">Comienza creando tu primer registro.</p>
            </div>
          )}
        </div>
      </div>

      {/* Paginación mejorada */}
      {totalPages > 1 && (
        <div className="mt-8 border-t border-gray-200 pt-6">
          <div className="flex flex-col sm:flex-row items-center justify-between space-y-4 sm:space-y-0">
            <div className="text-sm text-gray-700">
              Mostrando <span className="font-medium">{((page - 1) * pageSize) + 1}</span> a{' '}
              <span className="font-medium">
                {Math.min(page * pageSize, filteredList.length)}
              </span> de{' '}
              <span className="font-medium">{filteredList.length}</span> registros
            </div>
            <div className="flex items-center space-x-2">
              <button
                onClick={() => setPage(p => Math.max(1, p - 1))}
                disabled={page === 1}
                className="inline-flex items-center px-3 py-2 border border-gray-300 shadow-sm text-sm font-medium rounded-lg text-gray-700 bg-white hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500 disabled:opacity-50 disabled:cursor-not-allowed transition-all duration-200"
              >
                <svg className="w-4 h-4 mr-1" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M15 19l-7-7 7-7" />
                </svg>
                Anterior
              </button>
              <div className="flex space-x-1">
                {Array.from({ length: totalPages }, (_, i) => i + 1).map(pageNum => (
                  <button
                    key={pageNum}
                    onClick={() => setPage(pageNum)}
                    className={`px-3 py-2 text-sm font-medium rounded-lg transition-all duration-200 ${page === pageNum
                      ? 'bg-blue-600 text-white shadow-lg transform scale-105'
                      : 'text-gray-700 bg-white border border-gray-300 hover:bg-gray-50 hover:transform hover:scale-105'
                      }`}
                  >
                    {pageNum}
                  </button>
                ))}
              </div>
              <button
                onClick={() => setPage(p => Math.min(totalPages, p + 1))}
                disabled={page === totalPages}
                className="inline-flex items-center px-3 py-2 border border-gray-300 shadow-sm text-sm font-medium rounded-lg text-gray-700 bg-white hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500 disabled:opacity-50 disabled:cursor-not-allowed transition-all duration-200"
              >
                Siguiente
                <svg className="w-4 h-4 ml-1" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M9 5l7 7-7 7" />
                </svg>
              </button>
            </div>
          </div>
        </div>
      )}

      {/* Modal de creación */}
      {showCreateModal && (
        <div className="fixed inset-0 bg-black bg-opacity-60 backdrop-blur-sm overflow-y-auto h-full w-full z-50 flex items-center justify-center p-2">
          <div className="relative mx-auto w-full max-w-4xl bg-white rounded-lg shadow-2xl transform transition-all duration-300 animate-in slide-in-from-bottom-4">
            {/* Header formal en escala de azules */}
            <div className="bg-gradient-to-r from-blue-700 to-blue-900 rounded-t-lg p-4 text-white border-b-2 border-blue-500">
              <div className="flex items-center justify-between">
                <div className="flex items-center space-x-3">
                  <div className="bg-blue-500 bg-opacity-30 rounded-lg p-2 border border-blue-400 border-opacity-30">
                    <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                      <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z" />
                    </svg>
                  </div>
                  <div>
                    <h3 className="text-lg font-semibold tracking-wide">Registro de Credencial VU</h3>
                    <p className="text-blue-200 text-xs font-medium">Sistema de Gestión de Credenciales Aduanales</p>
                  </div>
                </div>
                <button
                  onClick={closeModals}
                  className="text-blue-100 hover:text-white transition-colors p-2 hover:bg-blue-600 hover:bg-opacity-50 rounded-lg border border-blue-500 border-opacity-30"
                >
                  <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M6 18L18 6M6 6l12 12" />
                  </svg>
                </button>
              </div>
            </div>

            {/* Contenido del formulario */}
            <div className="p-4 max-h-[85vh] overflow-y-auto">
              <form className="space-y-4" onSubmit={async (e) => {
                e.preventDefault();
                const formData = new FormData();
                formData.append('usuario', form.usuario);
                formData.append('password', form.password);
                formData.append('patente', form.patente);
                formData.append('efirma', form.efirma);
                formData.append('is_importador', form.is_importador);
                formData.append('is_active', form.is_active);
                formData.append('acusecove', form.acusecove);
                formData.append('acuseedocument', form.acuseedocument);
                formData.append('organizacion_id', form.organizacion);
                if (form.key) formData.append('key', form.key);
                if (form.cer) formData.append('cer', form.cer);
                try {
                  const res = await postFormDataWithAuth(`${API_URL}/vucem/vucem/`, formData);
                  if (!res.ok) throw new Error('Error al crear');
                  await fetchVucem();
                  closeModals();
                } catch (err) {
                  alert('Error al crear');
                }
              }}>

                {/* Sección de Información Básica */}
                <div className="bg-slate-50 rounded-lg p-4 border border-slate-200">
                  <div className="flex items-center mb-3 pb-2 border-b border-slate-300">
                    <div className="bg-blue-600 rounded-lg p-2 mr-3 shadow-sm">
                      <svg className="w-4 h-4 text-white" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M16 7a4 4 0 11-8 0 4 4 0 018 0zM12 14a7 7 0 00-7 7h14a7 7 0 00-7-7z" />
                      </svg>
                    </div>
                    <div>
                      <h4 className="text-sm font-semibold text-slate-800">Información Básica del Usuario</h4>
                      <p className="text-xs text-slate-600">Datos de identificación del usuario VU</p>
                    </div>
                  </div>
                  <div className="grid grid-cols-1 lg:grid-cols-2 gap-4">
                    <div className="space-y-1">
                      <label className="block text-xs font-semibold text-slate-700">
                        Usuario VU <span className="text-red-600">*</span>
                      </label>
                      <input
                        name="usuario"
                        value={form.usuario}
                        onChange={handleInputChange}
                        required
                        className="w-full px-3 py-2 border border-slate-300 rounded-md shadow-sm focus:ring-2 focus:ring-blue-500 focus:border-blue-500 transition-all duration-200 bg-white text-slate-900 placeholder-slate-400 text-sm"
                        placeholder="Ingrese el nombre de usuario en Ventanilla Única"
                      />
                    </div>
                    <div className="space-y-1">
                      <label className="block text-xs font-semibold text-slate-700">
                        Número de Patente <span className="text-red-600">*</span>
                      </label>
                      <input
                        name="patente"
                        value={form.patente}
                        onChange={handleInputChange}
                        required
                        className="w-full px-3 py-2 border border-slate-300 rounded-md shadow-sm focus:ring-2 focus:ring-blue-500 focus:border-blue-500 transition-all duration-200 bg-white text-slate-900 placeholder-slate-400 text-sm"
                        placeholder="Ingrese el número de patente"
                      />
                    </div>
                  </div>
                </div>

                {/* Sección de Credenciales */}
                <div className="bg-slate-50 rounded-lg p-4 border border-slate-200">
                  <div className="flex items-center mb-3 pb-2 border-b border-slate-300">
                    <div className="bg-slate-700 rounded-lg p-2 mr-3 shadow-sm">
                      <svg className="w-4 h-4 text-white" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M12 15v2m-6 4h12a2 2 0 002-2v-6a2 2 0 00-2-2H6a2 2 0 00-2 2v6a2 2 0 002 2zm10-10V7a4 4 0 00-8 0v4h8z" />
                      </svg>
                    </div>
                    <div>
                      <h4 className="text-sm font-semibold text-slate-800">Credenciales de Seguridad</h4>
                      <p className="text-xs text-slate-600">Información de autenticación del sistema</p>
                    </div>
                  </div>
                  <div className="grid grid-cols-1 lg:grid-cols-2 gap-4">
                    <div className="space-y-1">
                      <label className="block text-xs font-semibold text-gray-700">
                        Password <span className="text-red-500">*</span>
                      </label>
                      <div className="relative">
                        <input
                          name="password"
                          type={showCreatePassword ? "text" : "password"}
                          value={form.password}
                          onChange={handleInputChange}
                          required
                          className="w-full px-3 py-2 pr-20 border border-gray-300 rounded-md shadow-sm focus:ring-2 focus:ring-blue-500 focus:border-blue-500 transition-all duration-200 bg-white text-sm"
                          placeholder="Ingrese el password"
                        />
                        <div className="absolute inset-y-0 right-0 flex items-center">
                          <button
                            type="button"
                            onClick={() => setShowCreatePassword(!showCreatePassword)}
                            className="px-2 py-1 text-gray-400 hover:text-gray-600 focus:outline-none transition-colors"
                            title={showCreatePassword ? "Ocultar password" : "Mostrar password"}
                          >
                            {showCreatePassword ? (
                              <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M13.875 18.825A10.05 10.05 0 0112 19c-4.478 0-8.268-2.943-9.543-7a9.97 9.97 0 011.563-3.029m5.858.908a3 3 0 114.243 4.243M9.878 9.878l4.242 4.242M9.878 9.878L8.464 8.464m1.414 1.414L21.536 21.536" />
                              </svg>
                            ) : (
                              <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" />
                                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M2.458 12C3.732 7.943 7.523 5 12 5c4.478 0 8.268 2.943 9.542 7-1.274 4.057-5.064 7-9.542 7-4.477 0-8.268-2.943-9.542-7z" />
                              </svg>
                            )}
                          </button>
                          <button
                            type="button"
                            onClick={() => copyToClipboard(form.password, 'Password')}
                            className="px-2 py-1 mr-1 text-gray-400 hover:text-gray-600 focus:outline-none transition-colors"
                            title="Copiar password"
                          >
                            <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M8 16H6a2 2 0 01-2-2V6a2 2 0 012-2h8a2 2 0 012 2v2m-6 12h8a2 2 0 002-2v-8a2 2 0 00-2-2h-8a2 2 0 00-2 2v8a2 2 0 002 2z" />
                            </svg>
                          </button>
                        </div>
                      </div>
                    </div>
                    <div className="space-y-1">
                      <label className="block text-xs font-semibold text-gray-700">
                        e.firma <span className="text-red-500">*</span>
                      </label>
                      <div className="relative">
                        <input
                          name="efirma"
                          type={showCreateEfirma ? "text" : "password"}
                          value={form.efirma}
                          onChange={handleInputChange}
                          required
                          className="w-full px-3 py-2 pr-20 border border-gray-300 rounded-md shadow-sm focus:ring-2 focus:ring-blue-500 focus:border-blue-500 transition-all duration-200 bg-white text-sm"
                          placeholder="Ingrese la e.firma"
                        />
                        <div className="absolute inset-y-0 right-0 flex items-center">
                          <button
                            type="button"
                            onClick={() => setShowCreateEfirma(!showCreateEfirma)}
                            className="px-2 py-1 text-gray-400 hover:text-gray-600 focus:outline-none transition-colors"
                            title={showCreateEfirma ? "Ocultar e.firma" : "Mostrar e.firma"}
                          >
                            {showCreateEfirma ? (
                              <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M13.875 18.825A10.05 10.05 0 0112 19c-4.478 0-8.268-2.943-9.543-7a9.97 9.97 0 011.563-3.029m5.858.908a3 3 0 114.243 4.243M9.878 9.878l4.242 4.242M9.878 9.878L8.464 8.464m1.414 1.414L21.536 21.536" />
                              </svg>
                            ) : (
                              <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" />
                                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M2.458 12C3.732 7.943 7.523 5 12 5c4.478 0 8.268 2.943 9.542 7-1.274 4.057-5.064 7-9.542 7-4.477 0-8.268-2.943-9.542-7z" />
                              </svg>
                            )}
                          </button>
                          <button
                            type="button"
                            onClick={() => copyToClipboard(form.efirma, 'e.firma')}
                            className="px-2 py-1 mr-1 text-gray-400 hover:text-gray-600 focus:outline-none transition-colors"
                            title="Copiar e.firma"
                          >
                            <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M8 16H6a2 2 0 01-2-2V6a2 2 0 012-2h8a2 2 0 012 2v2m-6 12h8a2 2 0 002-2v-8a2 2 0 00-2-2h-8a2 2 0 00-2 2v8a2 2 0 002 2z" />
                            </svg>
                          </button>
                        </div>
                      </div>
                    </div>
                  </div>
                </div>

                {/* Sección de Archivos de Certificado */}
                <div className="bg-slate-50 rounded-lg p-4 border border-slate-200">
                  <div className="flex items-center mb-3 pb-2 border-b border-slate-300">
                    <div className="bg-green-700 rounded-lg p-2 mr-3 shadow-sm">
                      <svg className="w-4 h-4 text-white" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z" />
                      </svg>
                    </div>
                    <div>
                      <h4 className="text-sm font-semibold text-slate-800">Certificados Digitales</h4>
                      <p className="text-xs text-slate-600">Archivos de certificado y clave privada</p>
                    </div>
                  </div>
                  <div className="grid grid-cols-1 lg:grid-cols-2 gap-4">
                    <div className="space-y-1">
                      <label className="block text-xs font-semibold text-slate-700">
                        Archivo de Clave (.key)
                      </label>
                      <input
                        name="key"
                        type="file"
                        accept=".key"
                        onChange={handleInputChange}
                        className="w-full px-3 py-2 border border-slate-300 rounded-md shadow-sm focus:ring-2 focus:ring-green-500 focus:border-green-500 transition-all duration-200 bg-white text-slate-900 file:mr-3 file:py-1 file:px-3 file:rounded-md file:border-0 file:text-xs file:font-semibold file:bg-green-100 file:text-green-800 hover:file:bg-green-200 text-sm"
                      />
                      {form.key && (
                        <div className="flex items-center text-xs text-green-700 bg-green-100 px-2 py-1.5 rounded-md border border-green-200">
                          <svg className="w-3 h-3 mr-1.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z" />
                          </svg>
                          {form.key.name}
                        </div>
                      )}
                    </div>
                    <div className="space-y-1">
                      <label className="block text-xs font-semibold text-slate-700">
                        Archivo de Certificado (.cer)
                      </label>
                      <input
                        name="cer"
                        type="file"
                        accept=".cer"
                        onChange={handleInputChange}
                        className="w-full px-3 py-2 border border-slate-300 rounded-md shadow-sm focus:ring-2 focus:ring-green-500 focus:border-green-500 transition-all duration-200 bg-white text-slate-900 file:mr-3 file:py-1 file:px-3 file:rounded-md file:border-0 file:text-xs file:font-semibold file:bg-green-100 file:text-green-800 hover:file:bg-green-200 text-sm"
                      />
                      {form.cer && (
                        <div className="flex items-center text-xs text-green-700 bg-green-100 px-2 py-1.5 rounded-md border border-green-200">
                          <svg className="w-3 h-3 mr-1.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z" />
                          </svg>
                          {form.cer.name}
                        </div>
                      )}
                    </div>
                  </div>
                </div>

                {/* Sección de Configuraciones */}
                <div className="bg-slate-50 rounded-lg p-4 border border-slate-200">
                  <div className="flex items-center mb-3 pb-2 border-b border-slate-300">
                    <div className="bg-amber-600 rounded-lg p-2 mr-3 shadow-sm">
                      <svg className="w-4 h-4 text-white" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M10.325 4.317c.426-1.756 2.924-1.756 3.35 0a1.724 1.724 0 002.573 1.066c1.543-.94 3.31.826 2.37 2.37a1.724 1.724 0 001.065 2.572c1.756.426 1.756 2.924 0 3.35a1.724 1.724 0 00-1.066 2.573c.94 1.543-.826 3.31-2.37 2.37a1.724 1.724 0 00-2.572 1.065c-.426 1.756-2.924 1.756-3.35 0a1.724 1.724 0 00-2.573-1.066c-1.543.94-3.31-.826-2.37-2.37a1.724 1.724 0 00-1.065-2.572c-1.756-.426-1.756-2.924 0-3.35a1.724 1.724 0 001.066-2.573c-.94-1.543.826-3.31 2.37-2.37.996.608 2.296.07 2.572-1.065z" />
                        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" />
                      </svg>
                    </div>
                    <div>
                      <h4 className="text-sm font-semibold text-slate-800">Configuraciones del Sistema</h4>
                      <p className="text-xs text-slate-600">Opciones y permisos de la credencial</p>
                    </div>
                  </div>
                  <div className="grid grid-cols-2 sm:grid-cols-4 gap-3">
                    <div className="flex items-center space-x-2 bg-white p-3 rounded-md border border-slate-200 shadow-sm">
                      <input
                        name="is_importador"
                        type="checkbox"
                        checked={form.is_importador}
                        onChange={handleInputChange}
                        className="w-4 h-4 text-blue-600 border-slate-300 rounded focus:ring-blue-500 focus:ring-1"
                      />
                      <label className="text-xs font-semibold text-slate-700">Importador</label>
                    </div>
                    <div className="flex items-center space-x-2 bg-white p-3 rounded-md border border-slate-200 shadow-sm">
                      <input
                        name="acusecove"
                        type="checkbox"
                        checked={form.acusecove}
                        onChange={handleInputChange}
                        className="w-4 h-4 text-blue-600 border-slate-300 rounded focus:ring-blue-500 focus:ring-1"
                      />
                      <label className="text-xs font-semibold text-slate-700">Acuse COVE</label>
                    </div>
                    <div className="flex items-center space-x-2 bg-white p-3 rounded-md border border-slate-200 shadow-sm">
                      <input
                        name="acuseedocument"
                        type="checkbox"
                        checked={form.acuseedocument}
                        onChange={handleInputChange}
                        className="w-4 h-4 text-blue-600 border-slate-300 rounded focus:ring-blue-500 focus:ring-1"
                      />
                      <label className="text-xs font-semibold text-slate-700">Acuse e-Document</label>
                    </div>
                    <div className="flex items-center space-x-2 bg-white p-3 rounded-md border border-slate-200 shadow-sm">
                      <input
                        name="is_active"
                        type="checkbox"
                        checked={form.is_active}
                        onChange={handleInputChange}
                        className="w-4 h-4 text-green-600 border-slate-300 rounded focus:ring-green-500 focus:ring-1"
                      />
                      <label className="text-xs font-semibold text-slate-700">Credencial Activa</label>
                    </div>
                  </div>
                </div>

                {/* Seccion de organizacion para super_users */}
                {currentUser.is_superuser ? (
                  <div className="bg-slate-50 rounded-lg p-4 border border-slate-200">
                    <div className="flex items-center mb-3 pb-2 border-b border-slate-300">
                      <div className="bg-amber-600 rounded-lg p-2 mr-3 shadow-sm">
                        <svg className="w-4 h-4 text-white" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                          <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M10.325 4.317c.426-1.756 2.924-1.756 3.35 0a1.724 1.724 0 002.573 1.066c1.543-.94 3.31.826 2.37 2.37a1.724 1.724 0 001.065 2.572c1.756.426 1.756 2.924 0 3.35a1.724 1.724 0 00-1.066 2.573c.94 1.543-.826 3.31-2.37 2.37a1.724 1.724 0 00-2.572 1.065c-.426 1.756-2.924 1.756-3.35 0a1.724 1.724 0 00-2.573-1.066c-1.543.94-3.31-.826-2.37-2.37a1.724 1.724 0 00-1.065-2.572c-1.756-.426-1.756-2.924 0-3.35a1.724 1.724 0 001.066-2.573c-.94-1.543.826-3.31 2.37-2.37.996.608 2.296.07 2.572-1.065z" />
                          <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" />
                        </svg>
                      </div>
                      <div>
                        <h4 className="text-sm font-semibold text-slate-800">Configuracion de Organizaciones</h4>
                        <p className="text-xs text-slate-600">Asignar la Organizacion a la que pertenece.</p>
                      </div>
                    </div>
                    <div className="grid grid-cols-1 lg:grid-cols-1 gap-4">
                      <div className="space-y-1">
                        <label className="block text-xs font-semibold text-slate-700">
                          Seleccionar Organizacion <span className="text-red-600">*</span>
                        </label>
                        <div className="relative rounded-lg shadow-sm">
                          <select
                            name="organizacion"
                            value={form.organizacion || ''}
                            onChange={handleInputChange}
                            className="block w-full rounded-lg border-gray-300 pl-3 pr-10 py-2.5 text-gray-900 placeholder-gray-500 
                              focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-blue-500 sm:text-sm
                              transition-all duration-200 bg-white appearance-none"
                          >
                            <option value="">Todas las organizaciones</option>
                            {organizaciones.results && organizaciones.results.map(org => (
                              <option key={org.id} value={org.id}>
                                {org.nombre}
                              </option>
                            ))}
                          </select>
                          <div className="absolute inset-y-0 right-0 flex items-center pr-3 pointer-events-none">
                            <svg className="h-5 w-5 text-gray-400 group-focus-within:text-blue-500" fill="none" viewBox="0 0 24 24" stroke="currentColor">
                              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M19 9l-7 7-7-7" />
                            </svg>
                          </div>
                        </div>
                      </div>
                    </div>
                  </div>
                ) : (
                  <div className="bg-slate-50 rounded-lg p-4 border border-slate-200"></div>
                )}
                {/* Botones de acción */}
                <div className="flex flex-col sm:flex-row justify-end space-y-2 sm:space-y-0 sm:space-x-3 pt-4 border-t border-slate-200">
                  <button
                    type="button"
                    onClick={closeModals}
                    className="w-full sm:w-auto px-6 py-2 border border-slate-300 rounded-md shadow-sm text-sm font-semibold text-slate-700 bg-white hover:bg-slate-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-slate-500 transition-all duration-200"
                  >
                    Cancelar
                  </button>
                  <button
                    type="submit"
                    className="w-full sm:w-auto px-6 py-2 border border-transparent rounded-md shadow-lg text-sm font-semibold text-white bg-gradient-to-r from-blue-700 to-blue-900 hover:from-blue-800 hover:to-blue-950 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500 transition-all duration-200 flex items-center justify-center space-x-2"
                  >
                    <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                      <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z" />
                    </svg>
                    <span>Registrar Credencial</span>
                  </button>
                </div>
              </form>
            </div>
          </div>
        </div>
      )}

      {/* Modal de edición */}
      {showEditModal && editVucem && (
        <div className="fixed inset-0 bg-black bg-opacity-60 backdrop-blur-sm overflow-y-auto h-full w-full z-50 flex items-center justify-center p-2">
          <div className="relative mx-auto w-full max-w-4xl bg-white rounded-lg shadow-2xl transform transition-all duration-300 animate-in slide-in-from-bottom-4">
            {/* Header formal en escala de azules */}
            <div className="bg-gradient-to-r from-blue-700 to-blue-900 rounded-t-lg p-4 text-white border-b-2 border-blue-500">
              <div className="flex items-center justify-between">
                <div className="flex items-center space-x-3">
                  <div className="bg-blue-500 bg-opacity-30 rounded-lg p-2 border border-blue-400 border-opacity-30">
                    <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                      <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M11 5H6a2 2 0 00-2 2v11a2 2 0 002 2h11a2 2 0 002-2v-5m-1.414-9.414a2 2 0 112.828 2.828L11.828 15H9v-2.828l8.586-8.586z" />
                    </svg>
                  </div>
                  <div>
                    <h3 className="text-lg font-semibold tracking-wide">Editar Credencial</h3>
                    <p className="text-blue-200 text-xs font-medium">Modificación de Credenciales Aduanales</p>
                  </div>
                </div>
                <button
                  onClick={closeModals}
                  className="text-blue-100 hover:text-white transition-colors p-2 hover:bg-blue-600 hover:bg-opacity-50 rounded-lg border border-blue-500 border-opacity-30"
                >
                  <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M6 18L18 6M6 6l12 12" />
                  </svg>
                </button>
              </div>
            </div>

            {/* Contenido del formulario */}
            <div className="p-4 max-h-[85vh] overflow-y-auto">
              <form className="space-y-4" onSubmit={async (e) => {
                e.preventDefault();
                if (!editVucem) return;
                const formData = new FormData();
                formData.append('usuario', form.usuario);
                if (form.password) formData.append('password', form.password);
                formData.append('patente', form.patente);
                formData.append('efirma', form.efirma);
                if (form.key) formData.append('key', form.key);
                if (form.cer) formData.append('cer', form.cer);
                formData.append('is_importador', form.is_importador);
                formData.append('acusecove', form.acusecove);
                formData.append('acuseedocument', form.acuseedocument);
                formData.append('is_active', form.is_active);
                try {
                  const res = await putFormDataWithAuth(`${API_URL}/vucem/vucem/${editVucem.id}/`, formData);
                  if (!res.ok) throw new Error('Error al actualizar');
                  await fetchVucem();
                  closeModals();
                } catch (err) {
                  alert('Error al actualizar');
                }
              }}>

                {/* Sección de Información Básica */}
                <div className="bg-slate-50 rounded-lg p-4 border border-slate-200">
                  <div className="flex items-center mb-3 pb-2 border-b border-slate-300">
                    <div className="bg-blue-600 rounded-lg p-2 mr-3 shadow-sm">
                      <svg className="w-4 h-4 text-white" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M16 7a4 4 0 11-8 0 4 4 0 018 0zM12 14a7 7 0 00-7 7h14a7 7 0 00-7-7z" />
                      </svg>
                    </div>
                    <div>
                      <h4 className="text-sm font-semibold text-slate-800">Información Básica del Usuario</h4>
                      <p className="text-xs text-slate-600">Datos de identificación del usuario VU</p>
                    </div>
                  </div>
                  <div className="grid grid-cols-1 lg:grid-cols-2 gap-4">
                    <div className="space-y-1">
                      <label className="block text-xs font-semibold text-slate-700">
                        Usuario VU <span className="text-red-600">*</span>
                      </label>
                      <input
                        name="usuario"
                        value={form.usuario}
                        onChange={handleInputChange}
                        required
                        className="w-full px-3 py-2 border border-slate-300 rounded-md shadow-sm focus:ring-2 focus:ring-blue-500 focus:border-blue-500 transition-all duration-200 bg-white text-slate-900 placeholder-slate-400 text-sm"
                        placeholder="Ingrese el nombre de usuario VU/RFC"
                      />
                    </div>
                    <div className="space-y-1">
                      <label className="block text-xs font-semibold text-slate-700">
                        Número de Patente <span className="text-red-600">*</span>
                      </label>
                      <input
                        name="patente"
                        value={form.patente}
                        onChange={handleInputChange}
                        required
                        className="w-full px-3 py-2 border border-slate-300 rounded-md shadow-sm focus:ring-2 focus:ring-blue-500 focus:border-blue-500 transition-all duration-200 bg-white text-slate-900 placeholder-slate-400 text-sm"
                        placeholder="Ingrese el número de patente"
                      />
                    </div>
                  </div>
                </div>

                {/* Sección de Credenciales */}
                <div className="bg-slate-50 rounded-lg p-4 border border-slate-200">
                  <div className="flex items-center mb-3 pb-2 border-b border-slate-300">
                    <div className="bg-slate-700 rounded-lg p-2 mr-3 shadow-sm">
                      <svg className="w-4 h-4 text-white" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M12 15v2m-6 4h12a2 2 0 002-2v-6a2 2 0 00-2-2H6a2 2 0 00-2 2v6a2 2 0 002 2zm10-10V7a4 4 0 00-8 0v4h8z" />
                      </svg>
                    </div>
                    <div>
                      <h4 className="text-sm font-semibold text-slate-800">Credenciales de Seguridad</h4>
                      <p className="text-xs text-slate-600">Información de autenticación del sistema</p>
                    </div>
                  </div>
                  <div className="grid grid-cols-1 lg:grid-cols-2 gap-4">
                    <div className="space-y-1">
                      <label className="block text-xs font-semibold text-gray-700">
                        Password <span className="text-red-500">*</span>
                      </label>
                      <div className="relative">
                        <input
                          name="password"
                          type={showEditPassword ? "text" : "password"}
                          value={form.password}
                          onChange={handleInputChange}
                          className="w-full px-3 py-2 pr-20 border border-gray-300 rounded-md shadow-sm focus:ring-2 focus:ring-blue-500 focus:border-blue-500 transition-all duration-200 bg-white text-sm"
                          placeholder="Ingrese el password"
                        />
                        <div className="absolute inset-y-0 right-0 flex items-center">
                          <button
                            type="button"
                            onClick={toggleEditPasswordVisibility}
                            className="px-2 py-1 text-gray-400 hover:text-gray-600 focus:outline-none transition-colors"
                            title={showEditPassword ? "Ocultar password" : "Mostrar password"}
                          >
                            {showEditPassword ? (
                              <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M13.875 18.825A10.05 10.05 0 0112 19c-4.478 0-8.268-2.943-9.543-7a9.97 9.97 0 011.563-3.029m5.858.908a3 3 0 114.243 4.243M9.878 9.878l4.242 4.242M9.878 9.878L8.464 8.464m1.414 1.414L21.536 21.536" />
                              </svg>
                            ) : (
                              <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" />
                                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M2.458 12C3.732 7.943 7.523 5 12 5c4.478 0 8.268 2.943 9.542 7-1.274 4.057-5.064 7-9.542 7-4.477 0-8.268-2.943-9.542-7z" />
                              </svg>
                            )}
                          </button>
                          <button
                            type="button"
                            onClick={() => copyToClipboard(form.password, 'Password')}
                            className="px-2 py-1 mr-1 text-gray-400 hover:text-gray-600 focus:outline-none transition-colors"
                            title="Copiar password"
                          >
                            <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M8 16H6a2 2 0 01-2-2V6a2 2 0 012-2h8a2 2 0 012 2v2m-6 12h8a2 2 0 002-2v-8a2 2 0 00-2-2h-8a2 2 0 00-2 2v8a2 2 0 002 2z" />
                            </svg>
                          </button>
                        </div>
                      </div>
                    </div>
                    <div className="space-y-1">
                      <label className="block text-xs font-semibold text-gray-700">
                        e.firma <span className="text-red-500">*</span>
                      </label>
                      <div className="relative">
                        <input
                          name="efirma"
                          type={showEditEfirma ? "text" : "password"}
                          value={form.efirma}
                          onChange={handleInputChange}
                          required
                          className="w-full px-3 py-2 pr-20 border border-gray-300 rounded-md shadow-sm focus:ring-2 focus:ring-blue-500 focus:border-blue-500 transition-all duration-200 bg-white text-sm"
                          placeholder="Ingrese la e.firma"
                        />
                        <div className="absolute inset-y-0 right-0 flex items-center">
                          <button
                            type="button"
                            onClick={toggleEditEfirmaVisibility}
                            className="px-2 py-1 text-gray-400 hover:text-gray-600 focus:outline-none transition-colors"
                            title={showEditEfirma ? "Ocultar e.firma" : "Mostrar e.firma"}
                          >
                            {showEditEfirma ? (
                              <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M13.875 18.825A10.05 10.05 0 0112 19c-4.478 0-8.268-2.943-9.543-7a9.97 9.97 0 011.563-3.029m5.858.908a3 3 0 114.243 4.243M9.878 9.878l4.242 4.242M9.878 9.878L8.464 8.464m1.414 1.414L21.536 21.536" />
                              </svg>
                            ) : (
                              <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" />
                                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M2.458 12C3.732 7.943 7.523 5 12 5c4.478 0 8.268 2.943 9.542 7-1.274 4.057-5.064 7-9.542 7-4.477 0-8.268-2.943-9.542-7z" />
                              </svg>
                            )}
                          </button>
                          <button
                            type="button"
                            onClick={() => copyToClipboard(form.efirma, 'e.firma')}
                            className="px-2 py-1 mr-1 text-gray-400 hover:text-gray-600 focus:outline-none transition-colors"
                            title="Copiar e.firma"
                          >
                            <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M8 16H6a2 2 0 01-2-2V6a2 2 0 012-2h8a2 2 0 012 2v2m-6 12h8a2 2 0 002-2v-8a2 2 0 00-2-2h-8a2 2 0 00-2 2v8a2 2 0 002 2z" />
                            </svg>
                          </button>
                        </div>
                      </div>
                    </div>
                  </div>
                </div>

                {/* Sección de Archivos de Certificado */}
                <div className="bg-slate-50 rounded-lg p-4 border border-slate-200">
                  <div className="flex items-center mb-3 pb-2 border-b border-slate-300">
                    <div className="bg-green-700 rounded-lg p-2 mr-3 shadow-sm">
                      <svg className="w-4 h-4 text-white" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z" />
                      </svg>
                    </div>
                    <div>
                      <h4 className="text-sm font-semibold text-slate-800">Certificados Digitales</h4>
                      <p className="text-xs text-slate-600">Archivos de certificado y clave privada</p>
                    </div>
                  </div>
                  <div className="grid grid-cols-1 lg:grid-cols-2 gap-4">
                    <div className="space-y-1">
                      <label className="block text-xs font-semibold text-slate-700">
                        Archivo de Clave (.key)
                      </label>
                      <input
                        name="key"
                        type="file"
                        accept=".key"
                        onChange={handleInputChange}
                        className="w-full px-3 py-2 border border-slate-300 rounded-md shadow-sm focus:ring-2 focus:ring-green-500 focus:border-green-500 transition-all duration-200 bg-white text-slate-900 file:mr-3 file:py-1 file:px-3 file:rounded-md file:border-0 file:text-xs file:font-semibold file:bg-green-100 file:text-green-800 hover:file:bg-green-200 text-sm"
                      />
                      {form.key && (
                        <div className="flex items-center text-xs text-green-700 bg-green-100 px-2 py-1.5 rounded-md border border-green-200">
                          <svg className="w-3 h-3 mr-1.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z" />
                          </svg>
                          {form.key.name}
                        </div>
                      )}
                    </div>
                    <div className="space-y-1">
                      <label className="block text-xs font-semibold text-slate-700">
                        Archivo de Certificado (.cer)
                      </label>
                      <input
                        name="cer"
                        type="file"
                        accept=".cer"
                        onChange={handleInputChange}
                        className="w-full px-3 py-2 border border-slate-300 rounded-md shadow-sm focus:ring-2 focus:ring-green-500 focus:border-green-500 transition-all duration-200 bg-white text-slate-900 file:mr-3 file:py-1 file:px-3 file:rounded-md file:border-0 file:text-xs file:font-semibold file:bg-green-100 file:text-green-800 hover:file:bg-green-200 text-sm"
                      />
                      {form.cer && (
                        <div className="flex items-center text-xs text-green-700 bg-green-100 px-2 py-1.5 rounded-md border border-green-200">
                          <svg className="w-3 h-3 mr-1.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z" />
                          </svg>
                          {form.cer.name}
                        </div>
                      )}
                    </div>
                  </div>
                </div>

                {/* Sección de Configuraciones */}
                <div className="bg-slate-50 rounded-lg p-4 border border-slate-200">
                  <div className="flex items-center mb-3 pb-2 border-b border-slate-300">
                    <div className="bg-amber-600 rounded-lg p-2 mr-3 shadow-sm">
                      <svg className="w-4 h-4 text-white" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M10.325 4.317c.426-1.756 2.924-1.756 3.35 0a1.724 1.724 0 002.573 1.066c1.543-.94 3.31.826 2.37 2.37a1.724 1.724 0 001.065 2.572c1.756.426 1.756 2.924 0 3.35a1.724 1.724 0 00-1.066 2.573c.94 1.543-.826 3.31-2.37 2.37a1.724 1.724 0 00-2.572 1.065c-.426 1.756-2.924 1.756-3.35 0a1.724 1.724 0 00-2.573-1.066c-1.543.94-3.31-.826-2.37-2.37a1.724 1.724 0 00-1.065-2.572c-1.756-.426-1.756-2.924 0-3.35a1.724 1.724 0 001.066-2.573c-.94-1.543.826-3.31 2.37-2.37.996.608 2.296.07 2.572-1.065z" />
                        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" />
                      </svg>
                    </div>
                    <div>
                      <h4 className="text-sm font-semibold text-slate-800">Configuraciones del Sistema</h4>
                      <p className="text-xs text-slate-600">Opciones y permisos de la credencial</p>
                    </div>
                  </div>
                  <div className="grid grid-cols-2 sm:grid-cols-4 gap-3">
                    <div className="flex items-center space-x-2 bg-white p-3 rounded-md border border-slate-200 shadow-sm">
                      <input
                        name="is_importador"
                        type="checkbox"
                        checked={form.is_importador}
                        onChange={handleInputChange}
                        className="w-4 h-4 text-blue-600 border-slate-300 rounded focus:ring-blue-500 focus:ring-1"
                      />
                      <label className="text-xs font-semibold text-slate-700">Importador</label>
                    </div>
                    <div className="flex items-center space-x-2 bg-white p-3 rounded-md border border-slate-200 shadow-sm">
                      <input
                        name="acusecove"
                        type="checkbox"
                        checked={form.acusecove}
                        onChange={handleInputChange}
                        className="w-4 h-4 text-blue-600 border-slate-300 rounded focus:ring-blue-500 focus:ring-1"
                      />
                      <label className="text-xs font-semibold text-slate-700">Acuse COVE</label>
                    </div>
                    <div className="flex items-center space-x-2 bg-white p-3 rounded-md border border-slate-200 shadow-sm">
                      <input
                        name="acuseedocument"
                        type="checkbox"
                        checked={form.acuseedocument}
                        onChange={handleInputChange}
                        className="w-4 h-4 text-blue-600 border-slate-300 rounded focus:ring-blue-500 focus:ring-1"
                      />
                      <label className="text-xs font-semibold text-slate-700">Acuse e-Document</label>
                    </div>
                    <div className="flex items-center space-x-2 bg-white p-3 rounded-md border border-slate-200 shadow-sm">
                      <input
                        name="is_active"
                        type="checkbox"
                        checked={form.is_active}
                        onChange={handleInputChange}
                        className="w-4 h-4 text-green-600 border-slate-300 rounded focus:ring-green-500 focus:ring-1"
                      />
                      <label className="text-xs font-semibold text-slate-700">Credencial Activa</label>
                    </div>
                  </div>
                </div>

                {/* Botones de acción */}
                <div className="flex flex-col sm:flex-row justify-end space-y-2 sm:space-y-0 sm:space-x-3 pt-4 border-t border-slate-200">
                  <button
                    type="button"
                    onClick={closeModals}
                    className="w-full sm:w-auto px-6 py-2 border border-slate-300 rounded-md shadow-sm text-sm font-semibold text-slate-700 bg-white hover:bg-slate-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-slate-500 transition-all duration-200"
                  >
                    Cancelar
                  </button>
                  <button
                    type="submit"
                    className="w-full sm:w-auto px-6 py-2 border border-transparent rounded-md shadow-lg text-sm font-semibold text-white bg-gradient-to-r from-blue-700 to-blue-900 hover:from-blue-800 hover:to-blue-950 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500 transition-all duration-200 flex items-center justify-center space-x-2"
                  >
                    <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                      <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M4 16v1a3 3 0 003 3h10a3 3 0 003-3v-1m-4-8l-4-4m0 0L8 8m4-4v12" />
                    </svg>
                    <span>Actualizar Credencial</span>
                  </button>
                </div>

              </form>
            </div>
          </div>
        </div>
      )}

      {/* Modal de eliminación */}
      {showDeleteModal && deleteVucem && (
        <div className="fixed inset-0 bg-gray-600 bg-opacity-50 overflow-y-auto h-full w-full z-50">
          <div className="relative top-20 mx-auto p-5 border w-11/12 md:w-96 shadow-lg rounded-md bg-white">
            <div className="mt-3 text-center">
              <div className="mx-auto flex items-center justify-center h-12 w-12 rounded-full bg-red-100 mb-4">
                <svg className="h-6 w-6 text-red-600" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" d="M6 18L18 6M6 6l12 12" />
                </svg>
              </div>
              <h3 className="text-lg font-medium text-gray-900 mb-2">¿Eliminar Credencial?</h3>
              <div className="mt-2 px-7 py-3">
                <p className="text-sm text-gray-500 mb-4">
                  ¿Estás seguro que deseas eliminar el registro <span className="font-semibold">{deleteVucem.usuario}</span>?
                </p>
                <p className="text-sm text-red-600">Esta acción no se puede deshacer.</p>
              </div>
              <div className="flex justify-center space-x-3 pt-4">
                <button type="button" onClick={closeModals} className="px-4 py-2 border border-gray-300 rounded-md shadow-sm text-sm font-medium text-gray-700 bg-white hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500 transition-colors disabled:opacity-50">Cancelar</button>
                <button type="button" onClick={async () => {
                  if (!deleteVucem) return;
                  try {
                    const res = await deleteWithAuth(`${API_URL}/vucem/vucem/${deleteVucem.id}/`);
                    if (!res.ok) throw new Error('Error al eliminar');
                    await fetchVucem();
                    closeModals();
                  } catch (err) {
                    alert('Error al eliminar');
                  }
                }} className="px-4 py-2 border border-transparent rounded-md shadow-sm text-sm font-medium text-white bg-red-600 hover:bg-red-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-red-500 transition-colors disabled:opacity-50 flex items-center">Eliminar</button>
              </div>
            </div>
          </div>
        </div>
      )}
    </div>
  );
}