<a href="#" class="btn btn-secondary btn-lg demo-pulla" role="button"><i class="fa-solid fa-house-chimney"></i></a>

.demo-pulla {
  width: 40px;
  height: 40px;
  font-size: 1em;
  border-radius: 100%;
  padding: 8px;
  text-align: center;
  border: 1px solid #ffffff;
  outline: 1px solid rgba(255, 255, 255, 0.60);
  outline-offset: 4px;
}