.left-panel-content{opacity:1;transition:all .3s .2s}.left-panel-content.hidden{opacity:0;visibility:hidden;pointer-events:none;-webkit-user-select:none;-moz-user-select:none;user-select:none;cursor:default;border:0;width:0;min-width:0;max-width:0;height:0;margin:0;padding:0;transition:opacity .2s;position:absolute;overflow:hidden}