<button class="radikalwp-btn-glass">دانلود رایگان<//button>

.radikalwp-btn-glass {
  padding: 14px 32px;
  font-size: 16px;
  font-family: inherit;
  color: #f8fafc;
  background: rgba(255, 255, 255, .12);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, .25);
  border-radius: 16px;
  cursor: pointer;
  transition: all .3s ease;
}
.radikalwp-btn-glass:hover {
  background: rgba(255, 255, 255, .22);
  transform: scale(1.04);
}