.certification .signature {
  top: -4.8rem;
  left: -3rem;
}

@media only screen and (max-width: 992px) {
  .certification .signature {
    top: -4.5rem;
    left: -3rem;
  }
}

@media only screen and (max-width: 600px) {
  .certification .signature {
    top: -5.5rem;
    left: -3.5rem;
  }
}