document.addEventListener('DOMContentLoaded', () => {
    // Menügruppen ein- und ausklappen
    document.querySelectorAll('#menu .menu-group h3').forEach(header => {
        header.addEventListener('click', () => {
            const group = header.parentElement;
            group.classList.toggle('open');
        });
    });

    // Menü öffnen/schließen
    const menuToggle = document.getElementById('menuToggle');
    const menu = document.getElementById('menu');
    menuToggle.addEventListener('mouseover', () => {
        menu.classList.add('active');
    });
    menu.addEventListener('mouseleave', () => {
        menu.classList.remove('active');
    });

    // Ladeanimation nach Laden ausblenden
    window.addEventListener('load', () => {
        document.body.classList.add('loaded');
        const loader = document.getElementById('loader');
        if (loader) {
            loader.style.display = 'none';
        }
    });
});

// Fehlerbehandlung für Bilder
function handleImageError(img) {
    img.onerror = null;
    img.src = 'img/placeholder.png';
}