.cm-sidenav-submenu-enter-active,.cm-sidenav-submenu-leave-active{transition:opacity .15s,max-height .2s;overflow:hidden}.cm-sidenav-submenu-enter-from,.cm-sidenav-submenu-leave-to{opacity:0;max-height:0}.cm-sidenav-submenu-enter-to,.cm-sidenav-submenu-leave-from{opacity:1;max-height:500px}