figureslibres.cc/user/themes/figureslibres/scss/theme/_sidebar.scss

.sidebar-right{
  position: fixed;
  width: 20%;
  height: 100%;
  top: 0;
  right: 0;
  display: flex;
  ul{
    margin: auto;
    text-align: right;
    margin-right: 20px;
    a{
      color: grey;
      &:hover{
        &::after{
          content: "D";
        }
      }
    }
  }
}