.button {
  padding: 10px 20px;
  border: none;
  border-radius: 10px;
  background: linear-gradient(90deg, #68cf48 0%, #87d7be 100%);
  position: relative;
  z-index: 0;
  color: #FFF;
  text-align: center;
}

.button::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  right: 2px;
  bottom: 2px;
  background: #000; 
  border-radius: inherit;
  z-index: -1;
}

.w-5.h-5 { 
    width: 20px;
}