@media only screen and (max-width: 600px) {
  .div-card-catalog-header {
    display: block;
  }

  .div-card-catalog-header .btn-download,
  .btn-guardar {
    width: 45%;
  }

  .form-catalog-search {
    margin-top: 5px;
    width: 100%;
  }

  .form-catalog-search input,
  button {
    width: 46%;
  }
}