<a class="bn47" href="/">Button</a>

.bn47 {
  position: relative;
  padding: 1rem 2rem 0.5rem 2.5rem;
  color: #000000;
  border: 3px solid #776e62;
  -webkit-transition: padding 0.3s ease-in-out;
  transition: padding 0.3s ease-in-out;
}

.bn47:before {
  content: "";
  position: absolute;
  top: 0.5rem;
  left: 0.5rem;
  z-index: -1;
  height: 100%;
  width: 100%;
  background-color: #ffffff;
  border-right: 3px solid #ffffff;
  border-bottom: 3px solid #ffffff;
  -webkit-transition: all 0.3s ease-in-out;
  transition: all 0.3s ease-in-out;
}

.bn47:hover {
  padding: 0.75rem 2.25rem;
}

.bn47:hover:before {
  top: 0;
  left: 0;
}