#VPSidebarNav > .group {
    counter-reset: sidebar-level-1;
}
.VPSidebarItem.level-1 {
    counter-reset: sidebar-level-2;
}
.VPSidebarItem.level-1 > .item > .VPLink > .text:before {
    counter-increment: sidebar-level-1;
    content: counter(sidebar-level-1) ". ";
    counter-reset: sidebar-level-2;
}
.VPSidebarItem.level-2 > .item > .VPLink > .text:before {
    counter-increment: sidebar-level-2;
    content: counter(sidebar-level-1) "." counter(sidebar-level-2) ". ";
}