.document-center {
  padding: 30px;
  max-width: 1200px;
  margin: 0 auto;
  font-family: 'Poppins', sans-serif;
}

.document-header {
  display: flex;
  align-items: center;
  margin-bottom: 30px;
  gap: 20px;
}

.back-button {
  background: #f3f4f6;
  border: none;
  padding: 10px 15px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  color: #374151;
  transition: all 0.3s ease;
}

.back-button:hover {
  background: #e5e7eb;
}

.header-content h1 {
  font-size: 32px;
  font-weight: 700;
  color: #111827;
  margin: 0 0 8px 0;
}

.header-content p {
  color: #6b7280;
  margin: 0;
  font-size: 16px;
}

/* Statistics Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.stat-card {
  background: white;
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  text-align: center;
  border: 1px solid #e5e7eb;
}

.stat-card h3 {
  font-size: 12px;
  font-weight: 600;
  color: #6b7280;
  margin: 0 0 8px 0;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-card p {
  font-size: 24px;
  font-weight: 700;
  color: #111827;
  margin: 0;
}

/* Search and Filter Section */
.search-filter-section {
  display: flex;
  gap: 20px;
  margin-bottom: 30px;
  align-items: center;
  flex-wrap: wrap;
}

.search-bar {
  flex: 1;
  min-width: 300px;
}

.search-bar input {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid #e5e7eb;
  border-radius: 8px;
  font-size: 14px;
  transition: all 0.3s ease;
}

.search-bar input:focus {
  outline: none;
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.category-filters {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.category-btn {
  padding: 8px 16px;
  border: 1px solid #e5e7eb;
  background: white;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  color: #374151;
  transition: all 0.3s ease;
}

.category-btn:hover {
  background: #f9fafb;
}

.category-btn.active {
  background: #3b82f6;
  color: white;
  border-color: #3b82f6;
}

/* Action Buttons */
.action-buttons {
  display: flex;
  gap: 15px;
  margin-bottom: 30px;
}

.upload-btn, .link-btn {
  padding: 12px 20px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.3s ease;
}

.upload-btn {
  background: #10b981;
  color: white;
}

.upload-btn:hover {
  background: #059669;
}

.link-btn {
  background: #3b82f6;
  color: white;
}

.link-btn:hover {
  background: #2563eb;
}

/* Documents Section */
.documents-section {
  background: white;
  border-radius: 12px;
  padding: 30px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  border: 1px solid #e5e7eb;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 25px;
}

.section-header h2 {
  font-size: 20px;
  font-weight: 600;
  color: #111827;
  margin: 0;
}

.view-toggle {
  display: flex;
  gap: 5px;
}

.view-btn {
  padding: 8px 12px;
  border: 1px solid #e5e7eb;
  background: white;
  border-radius: 6px;
  cursor: pointer;
  font-size: 16px;
  transition: all 0.3s ease;
}

.view-btn:hover {
  background: #f9fafb;
}

.view-btn.active {
  background: #3b82f6;
  color: white;
  border-color: #3b82f6;
}

/* Documents Grid */
.documents-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.documents-grid.list-view {
  grid-template-columns: 1fr;
}

.document-card {
  background: white;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 20px;
  position: relative;
  transition: all 0.3s ease;
}

.document-card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  transform: translateY(-2px);
}

.new-tag {
  position: absolute;
  top: 12px;
  right: 12px;
  background: #10b981;
  color: white;
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
}

.document-icon {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  margin-bottom: 12px;
}

.document-type {
  font-size: 12px;
  font-weight: 600;
  color: #6b7280;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.document-title {
  font-size: 16px;
  font-weight: 600;
  color: #111827;
  margin: 0 0 8px 0;
  line-height: 1.4;
}

.document-description {
  font-size: 14px;
  color: #6b7280;
  margin: 0 0 15px 0;
  line-height: 1.5;
}

.document-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 15px;
  font-size: 12px;
  color: #6b7280;
}

.document-actions {
  display: flex;
  gap: 10px;
}

.action-btn {
  padding: 8px 12px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 500;
  transition: all 0.3s ease;
}

.view-btn, .download-btn {
  background: #3b82f6;
  color: white;
}

.view-btn:hover, .download-btn:hover {
  background: #2563eb;
}

.delete-btn {
  background: #ef4444;
  color: white;
}

.delete-btn:hover {
  background: #dc2626;
}

/* Modal Styles */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal {
  background: white;
  border-radius: 12px;
  padding: 30px;
  width: 90%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.modal-header h3 {
  font-size: 20px;
  font-weight: 600;
  color: #111827;
  margin: 0;
}

.close-btn {
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: #6b7280;
  padding: 0;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.close-btn:hover {
  color: #374151;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: #374151;
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 10px 12px;
  border: 2px solid #e5e7eb;
  border-radius: 6px;
  font-size: 14px;
  transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

.modal-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  margin-top: 30px;
}

.modal-actions button {
  padding: 10px 20px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.3s ease;
}

.modal-actions button[type="button"] {
  background: #f3f4f6;
  color: #374151;
}

.modal-actions button[type="button"]:hover {
  background: #e5e7eb;
}

.modal-actions button[type="submit"] {
  background: #3b82f6;
  color: white;
}

.modal-actions button[type="submit"]:hover {
  background: #2563eb;
}

/* Loading and Error States */
.loading {
  text-align: center;
  padding: 40px;
  color: #6b7280;
  font-size: 16px;
}

.error-message {
  background: #fef2f2;
  color: #dc2626;
  padding: 12px 16px;
  border-radius: 6px;
  border: 1px solid #fecaca;
  margin-bottom: 20px;
  font-size: 14px;
}

.no-documents {
  text-align: center;
  padding: 40px;
  color: #6b7280;
  font-size: 16px;
}

/* Responsive Design */
@media (max-width: 768px) {
  .document-center {
    padding: 20px;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .search-filter-section {
    flex-direction: column;
    align-items: stretch;
  }
  
  .search-bar {
    min-width: auto;
  }
  
  .category-filters {
    justify-content: center;
  }
  
  .action-buttons {
    flex-direction: column;
  }
  
  .documents-grid {
    grid-template-columns: 1fr;
  }
  
  .modal {
    width: 95%;
    padding: 20px;
  }
}