(function () {
    var toggle = document.getElementById('darkModeToggle');
    var saved = null;
    try { saved = localStorage.getItem('dark_mode'); } catch (error) { /* Storage may be unavailable. */ }
    function applyTheme(enabled) {
        document.body.classList.toggle('dark-mode', enabled);
        toggle.setAttribute('aria-pressed', String(enabled));
        toggle.setAttribute('aria-label', enabled ? 'Switch to light mode' : 'Switch to dark mode');
    }
    applyTheme(saved === 'true' || (saved === null && window.matchMedia('(prefers-color-scheme: dark)').matches));
    toggle.addEventListener('click', function () {
        var enabled = !document.body.classList.contains('dark-mode');
        applyTheme(enabled);
        try { localStorage.setItem('dark_mode', String(enabled)); } catch (error) { /* Theme works without storage. */ }
    });
}());

// Standard language dropdown, matching the main website header.
(function () {
    var menu = document.querySelector('.lang-more');
    var button = document.querySelector('.lang-more-btn');
    if (!menu || !button) return;
    function closeLanguages() {
        menu.classList.remove('open');
        button.setAttribute('aria-expanded', 'false');
    }
    button.addEventListener('click', function (event) {
        event.preventDefault();
        event.stopPropagation();
        var open = menu.classList.toggle('open');
        button.setAttribute('aria-expanded', String(open));
    });
    document.addEventListener('click', function (event) {
        if (!menu.contains(event.target)) closeLanguages();
    });
    document.addEventListener('keydown', function (event) {
        if (event.key === 'Escape') closeLanguages();
    });
    document.getElementById('navToggle').addEventListener('click', closeLanguages);
}());