.star-wrap {
  display: flex;
  align-items: center;
}
.star {
  width: 70px;
  height: 50px;
  background: url(../images/twitter_fave.png) no-repeat;
  background-position: 0 0;
  margin-left: 10px;
}
.active {
  background-position: -3519px 0;
  transition: background 1s steps(55);
}
.star-content {
  display: flex;
  width: 35px;
  height: 50px;
  align-items: center;
}