.presentation {
  text-align: center;
  .btn-icon {
    font-size: 100px;
    margin: 0 0.5em;
  }
}

.presentation .btn-icon {
  padding: 0;
  color: white;
  font-size: 2em;
  background: transparent;
  border-color: transparent;
  box-shadow: none;
  cursor: pointer;
  border-radius: 0;
}

 .presentation  .btn-icon .starred {
      color: #FECF15;
      
    } 
    
 .presentation .glyphicon{
    text-shadow: -1px 0 black, 0 1px black, 1px 0 black, 0 -1px black;
}  
    
  /* .presentation  .btn-icon .glyphicon-star .starred {
      color: #FECF15;
      &:hover {
        color: fadeout(@icon-star-color, 15%);
      }
    } */
    
/*     
.presentation .btn-icon  .glyphicon-star {
    color: #666;
    }
     */
  .presentation .btn-icon:hover {
     color: fadeout(#666, 50%);
    }