.list-group li{
	position: relative;
	list-style: none;
}

#categories-list .category-button{
    position: absolute;
    top: 0;
    z-index: 2;
    right: 0;
    display: block;
    padding: 0;
    height: 38px;
    width: 38px;
    text-align: center;
    cursor: pointer;
    }

#categories-list .category-button{
        padding-top: 8px;
    display: block;
    font-size: 16px;}
    
#categories-list .list-group li ul{
/*display: none;*/ 
    padding-left: 15px;
}
.active a.category-button:before {
  content: '-';
}
.category-button:before {
  content: '+';
}