css3 button animation

HTML

<button class="button-animation"><span>Hover </span></button>

CSS

.button-animation {
  background-color: orange;
  border: none;
  color: #FFFFFF;
  text-align: center;
  font-size: 15px;
  padding: 10px;
  width: 80px;
  transition: all 0.5s;
  cursor: pointer;
  margin: 5px;
}

.button-animation span {
  cursor: pointer;
  display: inline-block;
  position: relative;
  transition: 0.5s;
}

.button-animation span:after {
  content: '»';
  position: absolute;
  opacity: 0;
  top: 0;
  right: -10px;
  transition: 0.5s;
}

.button-animation:active span {
  padding-right: 15px;
}

.button-animation:active span:after {
  opacity: 1;
  right: 0;
}