.sidebar{position:sticky;top:6rem}.sidebar h2{margin-bottom:2rem;margin-left:1.75rem}.sidebar ol{list-style:none}.sidebar ol li{margin:1rem 0}.sidebar>div>ol{list-style:none;padding-left:2rem;position:relative}.sidebar>div>ol:before{background:#fff;border-radius:4px;content:"";display:block;height:100%;left:0;position:absolute;top:0;width:7px}.toc-list-item{line-height:1.2;position:relative}.toc-link:before{background-color:#039;border-radius:50%;height:15px;left:calc(-2rem - 5px);opacity:0;top:0;width:15px}.toc-link.is-active-link:before{opacity:1}