[data-toggle="collapse"]:after {
display: inline-block;
    display: inline-block;
    font: normal normal normal 14px/1 FontAwesome;
    font-size: inherit;
    text-rendering: auto;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  content: "\f054";
  transform: rotate(90deg) ;
  transition: all linear 0.25s;
  float: right;
  }   
[data-toggle="collapse"].collapsed:after {
  transform: rotate(0deg) ;
}