.info-section {
  background: #f8f9fa;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 2rem;
}

.info-section h3 {
  margin: 0 0 0.5rem 0;
  color: #333;
  font-size: 16px;
  font-weight: 600;
}

.info-section p {
  margin: 0;
  color: #666;
  font-size: 14px;
}

.info-formatos {
  background: #f8f9fa;
  border: 1px solid #e0e0e0;
  border-radius: 6px;
  padding: 1rem;
  margin-bottom: 1rem;
  font-size: 14px;
}

.info-formatos h4 {
  margin: 0 0 0.5rem 0;
  color: #333;
  font-size: 14px;
  font-weight: 600;
}

.info-formatos p {
  margin: 0.25rem 0;
  color: #666;
  font-style: italic;
}

#referencias-container {
  margin: 2rem 0;
  display: grid;
  gap: 2rem;
}

.tipo-referencia {
  background: #ffffff;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  padding: 0;
  margin-bottom: 1.5rem;
  transition: box-shadow 0.2s ease;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.tipo-referencia:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.tipo-header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 1rem 1.5rem;
  border-radius: 8px 8px 0 0;
  font-weight: 600;
  font-size: 16px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.tipo-content {
  padding: 1.5rem;
}

.referencias-lista {
  display: grid;
  gap: 1rem;
}

.referencia-item {
  background: #f8f9fa;
  border: 1px solid #e0e0e0;
  border-radius: 6px;
  padding: 1rem;
  position: relative;
  transition: transform 0.2s ease;
}

.referencia-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.referencia-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.referencia-numero {
  background: #667eea;
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.btn-eliminar-referencia {
  background: #dc3545;
  color: white;
  border: none;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
  transition: background-color 0.2s ease;
}

.btn-eliminar-referencia:hover {
  background: #c82333;
}

.referencia-campos {
  display: grid;
  gap: 0.75rem;
}

.referencia-campos.libro {
  grid-template-columns: 1fr 1fr;
}

.referencia-campos.articulo {
  grid-template-columns: 1fr 1fr;
}

.referencia-campos.web {
  grid-template-columns: 1fr 1fr;
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.form-row.full-width {
  grid-column: 1 / -1;
}

.form-row label {
  font-weight: 500;
  color: #333;
  font-size: 13px;
}

.form-row input,
.form-row textarea {
  padding: 8px 10px;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 14px;
  background: #ffffff;
  transition: border-color 0.2s ease;
}

.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 2px rgba(102, 126, 234, 0.1);
}

.form-row textarea {
  resize: vertical;
  min-height: 60px;
}

.agregar-referencia {
  text-align: center;
  padding: 1rem;
  border-top: 1px solid #e0e0e0;
}

.btn-agregar-referencia {
  background: #28a745;
  color: white;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: background-color 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-agregar-referencia:hover {
  background: #218838;
}

.btn-agregar-referencia::before {
  content: '+';
  font-size: 16px;
  font-weight: bold;
}

.form-buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 2rem;
  padding: 1.5rem;
  background: #f8f9fa;
  border-radius: 8px;
}

.btn {
  padding: 0.75rem 2rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 500;
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.mensaje {
  margin-top: 1rem;
  padding: 1rem;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 500;
  text-align: center;
  opacity: 0;
  transform: translateY(-10px);
  transition: all 0.3s ease;
}

.mensaje.mostrar {
  opacity: 1;
  transform: translateY(0);
}

.mensaje.exito {
  background: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.mensaje.exito::before {
  content: '✓ ';
  font-weight: bold;
}

.mensaje.error {
  background: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

.mensaje.error::before {
  content: '✗ ';
  font-weight: bold;
}

.autores-section {
  margin-bottom: 1.5rem;
  padding: 1rem;
  background: #f8f9fa;
  border: 1px solid #e9ecef;
  border-radius: 6px;
}

.autores-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.autores-header h4 {
  margin: 0;
  color: #333;
  font-size: 14px;
  font-weight: 600;
}

.btn-agregar-autor {
  background-color: #007bff;
  color: white;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
  transition: background-color 0.2s;
}

.btn-agregar-autor:hover {
  background-color: #0056b3;
}

.autores-lista {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.autor-item {
  background: white;
  border: 1px solid #dee2e6;
  border-radius: 4px;
  padding: 0.75rem;
}

.autor-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid #e9ecef;
}

.autor-numero {
  font-weight: 600;
  color: #495057;
  font-size: 12px;
}

.btn-eliminar-autor {
  background-color: #dc3545;
  color: white;
  border: none;
  padding: 0.25rem 0.5rem;
  border-radius: 3px;
  cursor: pointer;
  font-size: 11px;
  transition: background-color 0.2s;
}

.btn-eliminar-autor:hover {
  background-color: #c82333;
}

.autor-campos {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.autor-campos .form-row {
  margin-bottom: 0;
}

.autor-campos .form-row label {
  font-size: 12px;
  margin-bottom: 0.25rem;
}

.autor-campos .form-row input {
  padding: 0.5rem;
  font-size: 13px;
}

@media (max-width: 768px) {
  .referencia-campos.libro,
  .referencia-campos.articulo,
  .referencia-campos.web {
    grid-template-columns: 1fr;
  }
  
  .autor-campos {
    grid-template-columns: 1fr;
  }
  
  .autores-header {
    flex-direction: column;
    gap: 0.5rem;
    align-items: flex-start;
  }
  
  .form-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .btn {
    width: 100%;
    max-width: 300px;
  }
}

@media (max-width: 480px) {
  .info-section {
    padding: 1rem;
  }
  
  .tipo-content {
    padding: 1rem;
  }
  
  .referencia-item {
    padding: 0.75rem;
  }
  
  .referencia-header {
    flex-direction: column;
    gap: 0.5rem;
    align-items: flex-start;
  }
  
  .autores-section {
    padding: 0.75rem;
  }
  
  .autor-item {
    padding: 0.5rem;
  }
  
  .autor-header {
    flex-direction: column;
    gap: 0.25rem;
    align-items: flex-start;
  }
}