import React, { useEffect, useState } from 'react';
import { fetchWithAuth, postWithAuth, putWithAuth, deleteWithAuth } from '../fetchWithAuth';

const API_URL = import.meta.env.VITE_EFC_API_URL;
export default function Vucem() {
  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);

  // Estado para formulario de creación/edición
  const initialForm = {
    usuario: '',
    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('');

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

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

  // 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);
  };

  // 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 VUCEM');
      const data = await res.json();
      setVucemList(data);
      setError(null);
    } catch (err) {
      setError('Error al cargar VUCEM');
    }
    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);
    }
  };

  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,
      });
    }
  }, [editVucem]);

  // Table y header estilo Users.jsx
  return (
    <div className="p-6 max-w-7xl mx-auto">
      {/* 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 VUCEM 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 VUCEM...</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] ? 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] ? 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={() => { 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={() => { 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 VUCEM</h3>
                        <p className="text-gray-500">Comienza creando tu primer registro VUCEM.</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 VUCEM...</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={() => { 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={() => { 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] ? 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] ? 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 VUCEM</h3>
              <p className="text-gray-500 text-center">Comienza creando tu primer registro VUCEM.</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-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-3/4 lg:w-1/2 shadow-lg rounded-md bg-white">
            <div className="flex items-center justify-between mb-4">
              <h3 className="text-lg font-medium text-gray-900">Crear VUCEM</h3>
              <button onClick={closeModals} className="text-gray-400 hover:text-gray-600 transition-colors">
                <svg className="w-6 h-6" 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>
            <form className="space-y-6 w-full" 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);
              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 postWithAuth(`${API_URL}/vucem/vucem/`, formData);
                if (!res.ok) throw new Error('Error al crear VUCEM');
                await fetchVucem();
                closeModals();
              } catch (err) {
                alert('Error al crear VUCEM');
              }
            }}>
              <div className="grid grid-cols-1 sm:grid-cols-2 gap-6">
                <div>
                  <label className="block text-sm font-medium text-gray-700 mb-1">Usuario *</label>
                  <input name="usuario" value={form.usuario} onChange={handleInputChange} required className="w-full px-3 py-2 border border-gray-300 rounded-md shadow-sm focus:ring-2 focus:ring-blue-500 focus:border-blue-500 text-sm" placeholder="usuario" />
                </div>
                <div>
                  <label className="block text-sm font-medium text-gray-700 mb-1">Password *</label>
                  <div className="relative">
                    <input 
                      name="password" 
                      type={showPassword ? "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 text-sm" 
                      placeholder="password" 
                    />
                    <div className="absolute inset-y-0 right-0 flex items-center">
                      <button
                        type="button"
                        onClick={() => setShowPassword(!showPassword)}
                        className="px-2 py-1 text-gray-400 hover:text-gray-600 focus:outline-none"
                        title={showPassword ? "Ocultar password" : "Mostrar password"}
                      >
                        {showPassword ? (
                          <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"
                        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>
                  <label className="block text-sm font-medium text-gray-700 mb-1">Patente *</label>
                  <input name="patente" value={form.patente} onChange={handleInputChange} required className="w-full px-3 py-2 border border-gray-300 rounded-md shadow-sm focus:ring-2 focus:ring-blue-500 focus:border-blue-500 text-sm" placeholder="patente" />
                </div>
                <div>
                  <label className="block text-sm font-medium text-gray-700 mb-1">e.firma *</label>
                  <div className="relative">
                    <input 
                      name="efirma" 
                      type={showEfirma ? "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 text-sm" 
                      placeholder="e.firma" 
                    />
                    <div className="absolute inset-y-0 right-0 flex items-center">
                      <button
                        type="button"
                        onClick={() => setShowEfirma(!showEfirma)}
                        className="px-2 py-1 text-gray-400 hover:text-gray-600 focus:outline-none"
                        title={showEfirma ? "Ocultar e.firma" : "Mostrar e.firma"}
                      >
                        {showEfirma ? (
                          <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"
                        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>
                  <label className="block text-sm font-medium text-gray-700 mb-1">Key (.key)</label>
                  <input name="key" type="file" accept=".key" onChange={handleInputChange} className="w-full px-3 py-2 border border-gray-300 rounded-md shadow-sm text-sm" />
                  {form.key && <span className="text-xs text-gray-500">{form.key.name}</span>}
                </div>
                <div>
                  <label className="block text-sm font-medium text-gray-700 mb-1">Cer (.cer)</label>
                  <input name="cer" type="file" accept=".cer" onChange={handleInputChange} className="w-full px-3 py-2 border border-gray-300 rounded-md shadow-sm text-sm" />
                  {form.cer && <span className="text-xs text-gray-500">{form.cer.name}</span>}
                </div>
                <div className="flex gap-2 items-center">
                  <input name="is_importador" type="checkbox" checked={form.is_importador} onChange={handleInputChange} />
                  <label className="text-sm">Importador</label>
                </div>
                <div className="flex gap-2 items-center">
                  <input name="acusecove" type="checkbox" checked={form.acusecove} onChange={handleInputChange} />
                  <label className="text-sm">Acuse COVE</label>
                </div>
                <div className="flex gap-2 items-center">
                  <input name="acuseedocument" type="checkbox" checked={form.acuseedocument} onChange={handleInputChange} />
                  <label className="text-sm">Acuse e-Document</label>
                </div>
                <div className="flex gap-2 items-center">
                  <input name="is_active" type="checkbox" checked={form.is_active} onChange={handleInputChange} />
                  <label className="text-sm">Activo</label>
                </div>
              </div>
              <div className="flex justify-end space-x-3 pt-4 border-t border-gray-200">
                <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="submit" className="px-4 py-2 border border-transparent rounded-md shadow-sm text-sm font-medium text-white bg-blue-600 hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500 transition-colors disabled:opacity-50 flex items-center">Crear</button>
              </div>
            </form>
          </div>
        </div>
      )}

      {/* Modal de edición */}
      {showEditModal && editVucem && (
        <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-3/4 lg:w-1/2 shadow-lg rounded-md bg-white">
            <div className="flex items-center justify-between mb-4">
              <h3 className="text-lg font-medium text-gray-900">Editar VUCEM</h3>
              <button onClick={closeModals} className="text-gray-400 hover:text-gray-600 transition-colors">
                <svg className="w-6 h-6" 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>
            <form className="space-y-6 w-full" 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 putWithAuth(`${API_URL}/vucem/vucem/${editVucem.id}/`, formData);
                if (!res.ok) throw new Error('Error al actualizar VUCEM');
                await fetchVucem();
                closeModals();
              } catch (err) {
                alert('Error al actualizar VUCEM');
              }
            }}>
              <div className="grid grid-cols-1 sm:grid-cols-2 gap-6">
                <div>
                  <label className="block text-sm font-medium text-gray-700 mb-1">Usuario *</label>
                  <input name="usuario" value={form.usuario} onChange={handleInputChange} required className="w-full px-3 py-2 border border-gray-300 rounded-md shadow-sm focus:ring-2 focus:ring-blue-500 focus:border-blue-500 text-sm" placeholder="usuario" />
                </div>
                <div>
                  <label className="block text-sm font-medium text-gray-700 mb-1">Password *</label>
                  <div className="relative">
                    <input 
                      name="password" 
                      type={showPassword ? "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 text-sm" 
                      placeholder="password" 
                    />
                    <div className="absolute inset-y-0 right-0 flex items-center">
                      <button
                        type="button"
                        onClick={() => setShowPassword(!showPassword)}
                        className="px-2 py-1 text-gray-400 hover:text-gray-600 focus:outline-none"
                        title={showPassword ? "Ocultar password" : "Mostrar password"}
                      >
                        {showPassword ? (
                          <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"
                        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>
                  <label className="block text-sm font-medium text-gray-700 mb-1">Patente *</label>
                  <input name="patente" value={form.patente} onChange={handleInputChange} required className="w-full px-3 py-2 border border-gray-300 rounded-md shadow-sm focus:ring-2 focus:ring-blue-500 focus:border-blue-500 text-sm" placeholder="patente" />
                </div>
                <div>
                  <label className="block text-sm font-medium text-gray-700 mb-1">e.firma *</label>
                  <div className="relative">
                    <input 
                      name="efirma" 
                      type={showEfirma ? "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 text-sm" 
                      placeholder="e.firma" 
                    />
                    <div className="absolute inset-y-0 right-0 flex items-center">
                      <button
                        type="button"
                        onClick={() => setShowEfirma(!showEfirma)}
                        className="px-2 py-1 text-gray-400 hover:text-gray-600 focus:outline-none"
                        title={showEfirma ? "Ocultar e.firma" : "Mostrar e.firma"}
                      >
                        {showEfirma ? (
                          <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"
                        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>
                  <label className="block text-sm font-medium text-gray-700 mb-1">Key (.key)</label>
                  <input name="key" type="file" accept=".key" onChange={handleInputChange} className="w-full px-3 py-2 border border-gray-300 rounded-md shadow-sm text-sm" />
                  {form.key && <span className="text-xs text-gray-500">{form.key.name}</span>}
                </div>
                <div>
                  <label className="block text-sm font-medium text-gray-700 mb-1">Cer (.cer)</label>
                  <input name="cer" type="file" accept=".cer" onChange={handleInputChange} className="w-full px-3 py-2 border border-gray-300 rounded-md shadow-sm text-sm" />
                  {form.cer && <span className="text-xs text-gray-500">{form.cer.name}</span>}
                </div>
                <div className="flex gap-2 items-center">
                  <input name="is_importador" type="checkbox" checked={form.is_importador} onChange={handleInputChange} />
                  <label className="text-sm">Importador</label>
                </div>
                <div className="flex gap-2 items-center">
                  <input name="acusecove" type="checkbox" checked={form.acusecove} onChange={handleInputChange} />
                  <label className="text-sm">Acuse COVE</label>
                </div>
                <div className="flex gap-2 items-center">
                  <input name="acuseedocument" type="checkbox" checked={form.acuseedocument} onChange={handleInputChange} />
                  <label className="text-sm">Acuse e-Document</label>
                </div>
                <div className="flex gap-2 items-center">
                  <input name="is_active" type="checkbox" checked={form.is_active} onChange={handleInputChange} />
                  <label className="text-sm">Activo</label>
                </div>
              </div>
              <div className="flex justify-end space-x-3 pt-4 border-t border-gray-200">
                <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="submit" className="px-4 py-2 border border-transparent rounded-md shadow-sm text-sm font-medium text-white bg-blue-600 hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500 transition-colors disabled:opacity-50 flex items-center">Actualizar</button>
              </div>
            </form>
          </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 VUCEM?</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 VUCEM');
                    await fetchVucem();
                    closeModals();
                  } catch (err) {
                    alert('Error al eliminar VUCEM');
                  }
                }} 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>
  );
}