.sidebar-nav li{position:relative;margin:0;cursor:pointer}.sidebar-nav ul:not(.app-sub-sidebar)>li:not(.file)::before{content:'';display:block;position:absolute;top:11px;left:-12px;height:6px;width:6px;border-right:1px solid #505d6b;border-bottom:1px solid #505d6b;transform:rotate(-45deg);transition:transform .1s}.sidebar-nav ul:not(.app-sub-sidebar)>li.open::before{transform:rotate(45deg)}.sidebar-nav ul:not(.app-sub-sidebar)>li.collapse::before{transform:rotate(-45deg)}