.btn span {
    cursor: pointer;
    display: inline-block;
    position: relative;
    transition: 0.5s;
  }
.btn span:after {
    content: '\00bb';
    position: absolute;
    opacity: 0;
    top: 0;
    right: -20px;
    transition: 0.5s;
}
a{
    color:white;
    text-decoration: none;
}
a:after{
  color:white;
  text-decoration: none;
}
  a:hover{
    color:white;
  text-decoration: none;
  }
  a:hover:after{
    color:white;
    text-decoration: none;
  }
  .btn:hover span {
    padding-right: 25px;
  }
  
  .btn:hover span:after {
    opacity: 1;
    right: 0;
  }