@media (max-width: 980px) {
  #libroForm {
    padding: 16px 0 28px;
  }

  .formulario {
    width: 96vw;
    max-width: 96vw;
    padding: 18px 16px 20px;
    gap: 12px;
  }

  .title_general {
    font-size: 1.1rem;
    padding: 12px;
  }

  .form_grid_2,
  .form_grid_4,
  .form_row {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .formulario input,
  .formulario select,
  .formulario textarea {
    font-size: 16px;
  }

  .pie_form {
    font-size: 0.82rem;
  }
}

@media (max-width: 560px) {
  .formulario {
    padding: 14px 12px 16px;
  }

  .title_general {
    font-size: 1rem;
  }

  .btn_enviar button {
    width: 100%;
  }
}