<button class="radikalwp-btn-textswap"><span class="radikalwp-btn-textswap-stack"><span>مشاهده دوره‌ها<//span><span>همین حالا ثبت‌نام کن<//span><//span><//button>

.radikalwp-btn-textswap {
  padding: 0;
  font-family: inherit;
  background: linear-gradient(135deg, #0ea5e9, #6366f1);
  border: none;
  border-radius: 12px;
  cursor: pointer;
  overflow: hidden;
}
.radikalwp-btn-textswap-stack {
  display: block;
  transition: transform .35s cubic-bezier(.4, 0, .2, 1);
}
.radikalwp-btn-textswap-stack > span {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 34px;
  font-size: 15px;
  font-weight: 700;
  color: #fff;
}
.radikalwp-btn-textswap:hover .radikalwp-btn-textswap-stack {
  transform: translateY(-48px);
}