sition: relative;
  overflow: hidden;
  background-color: #3498db;
  border: none;
  border-radius: 5px;
  color: #fff;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  margin-top: 10px;
  padding: 10px 20px;
  text-align: center;
  text-transform: uppercase;
  transition: 0.3s;
  width: 100%;
  z-index: 1
}

button::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: linear-gradient(to right,#3498db,#5a5aeb,#7d44f0,#9a16ec);
  opac