@media (max-width: 768px) {
    .btn-responsive {
      padding:5px 10px;
      font-size:60%;
    }
  }
  
  @media (min-width: 769px) and (max-width: 992px) {
    .btn-responsive {
      padding:5px 10px;
      font-size:90%;
    }
  }