div.sphinxsidebarwrapper ul li.toctree-l1 {
    padding-left: 15px;
    text-indent: -15px;
}

div.sphinxsidebarwrapper ul li.toctree-l1 ul{
    margin-left: 10px;
}
div.sphinxsidebarwrapper ul li.toctree-l1 ul li.toctree-l2 {
    padding-left: 10px;
    text-indent: -10px;
    margin-left: 0px;
    list-style:none;
}