private void TabClicked(Tab tab)
        {
            if (tabs[activeTabIndex] == tab)
            {
                return;
            }

            if (activeTabIndex < tabs.Count && activeTabIndex >= 0)
            {
                tabs[activeTabIndex].RemoveFromClassList("active");
            }
            tab.AddToClassList("active");
            activeTabIndex = tabs.IndexOf(tab);

            LoadTabContent(tab);
        }