<button class="radikalwp-btn-iconswap">مشاهده بیشتر<span class="radikalwp-btn-iconswap-arrow">←<//span><//button>

.radikalwp-btn-iconswap {
  display: inline-flex;
  align-items: center;
  gap: 0;
  padding: 12px 28px;
  font-family: inherit;
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  background: #0f172a;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  overflow: hidden;
  transition: background .3s ease;
}
.radikalwp-btn-iconswap:hover { background: #1e293b; }
.radikalwp-btn-iconswap-arrow {
  display: inline-block;
  width: 0;
  opacity: 0;
  transform: translateX(-14px);
  transition: width .3s ease, opacity .3s ease, transform .3s ease;
  overflow: hidden;
}
.radikalwp-btn-iconswap:hover .radikalwp-btn-iconswap-arrow {
  width: 24px;
  opacity: 1;
  transform: translateX(0);
  margin-right: 10px;
}