Flamingo

.btn-flamingo {
  display: inline-block;
  padding: 13px 28px;
  border: none;
  border-radius: 999px;
  background: linear-gradient(90deg, #fb7185, #f43f5e, #fb7185);
  background-size: 200% auto;
  color: #ffffff;
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background-position 0.4s ease;
}
.btn-flamingo:hover {
  background-position: right center;
}