.button {
  display: inline-block;
  border-radius: 7px;
  border: none;
  background: #1875ff;
  color: white;
  font-family: inherit;
  text-align: center;
  font-size: 13px;
  box-shadow: 0px 14px 56px -11px #1875ff;
  width: 10em;
  padding: 1em;
  transition: all 0.4s;
  cursor: pointer;
}

.button span {
  cursor: pointer;
  display: inline-block;
  position: relative;
  transition: 0.4s;
}

.button span:after {
  content: "Free";
  position: absolute;
  opacity: 0;
  top: 0;
  right: 50px;
  transition: 0.25s;
}

.button:hover span {
  padding-left: 2.55em;
}

.button:hover span:after {
  opacity: 4;
  right: 70px;
}