.button {
  font-family: 'Cairo', sans-serif;
  border-radius: 4px;
  background-color: #bf1c2d;
  border: none;
  color: #FFFFFF;
  text-align: center;
  font-size: 30px;
  padding: 20px 30px;
  transition: all 0.5s;
  cursor: pointer;
  margin: 5px;
}
.button > span {
  cursor: pointer;
  display: inline-block;
  position: relative;
  transition: 0.5s;
}
.forward > span:after {
  content: ' »';
  position: absolute;
  opacity: 0;
  top: 0;
  right: -20px;
  transition: 0.5s;
}
.back > span:after {
  content: '« ';
  position: absolute;
  opacity: 0;
  top: 0;
  left: 0px;
  transition: 0.5s;
}
.forward:hover > span {
  padding-right: 25px;
}
.back:hover > span {
  padding-left: 25px;
}
.forward:hover > span:after {
  opacity: 1;
  right: 0;
}
.back:hover > span:after {
  opacity: 1;
  left: 0;
}