document.addEventListener('DOMContentLoaded', function () {
    const header = document.getElementById('mainHeader');
    
    if (header) {
        window.addEventListener('scroll', function () {
            if (window.scrollY > 100) {
                header.classList.add('scrolled');
            } else {
                header.classList.remove('scrolled');
            }
        });
    }

    // Intersection Observer for animations
    const animatedElements = document.querySelectorAll('.animate-on-scroll');
    if (animatedElements.length > 0) {
        const observer = new IntersectionObserver((entries) => {
            entries.forEach(entry => {
                if (entry.isIntersecting) {
                    entry.target.classList.add('is-visible');
                    // Optional: unobserve after animation
                    // observer.unobserve(entry.target);
                }
            });
        }, {
            threshold: 0.1 
        });

        animatedElements.forEach(el => {
            observer.observe(el);
        });
    }

    // Newsletter Form Handler
    const newsletterForm = document.getElementById('newsletterForm');
    if (newsletterForm) {
        newsletterForm.addEventListener('submit', function(e) {
            e.preventDefault();
            const emailInput = newsletterForm.querySelector('input[type="email"]');
            if (emailInput.value) {
                alert('Danke für Ihr Interesse! Sie wurden zu unserem Newsletter hinzugefügt.');
                emailInput.value = '';
            } else {
                alert('Bitte geben Sie eine gültige E-Mail-Adresse ein.');
            }
        });
    }

    // Cookie Banner Handler
    const cookieBanner = document.getElementById('cookieBanner');
    const cookieAccept = document.getElementById('cookieAccept');
    const cookieReject = document.getElementById('cookieReject');
    const cookieConsent = localStorage.getItem('cookie_consent');

    // Show banner if no consent has been given
    if (!cookieConsent) {
        setTimeout(() => {
            cookieBanner.classList.add('visible');
        }, 1000); // Delay showing the banner slightly
    }

    const handleCookieConsent = (consent) => {
        localStorage.setItem('cookie_consent', consent);
        cookieBanner.classList.remove('visible');
    };

    if(cookieAccept) {
        cookieAccept.addEventListener('click', () => handleCookieConsent('accepted'));
    }
    if(cookieReject) {
        cookieReject.addEventListener('click', () => handleCookieConsent('rejected'));
    }

    // Mobile Menu Handler
    const mobileToggle = document.querySelector('.mobile-toggle');
    const mobileMenu = document.getElementById('mobileMenu');
    const closeMobileMenu = document.getElementById('closeMobileMenu');
    const body = document.body;

    const openMenu = () => {
        mobileMenu.classList.add('open');
        body.classList.add('menu-open');
    };

    const closeMenu = () => {
        mobileMenu.classList.remove('open');
        body.classList.remove('menu-open');
    };

    if (mobileToggle && mobileMenu) {
        mobileToggle.addEventListener('click', openMenu);
    }

    if (closeMobileMenu) {
        closeMobileMenu.addEventListener('click', closeMenu);
    }

    // Close menu when clicking a link inside
    const mobileNavLinks = mobileMenu.querySelectorAll('a[href^="#"]');
    mobileNavLinks.forEach(link => {
        link.addEventListener('click', () => {
            // Don't close for section toggles
            if (!link.parentElement.classList.contains('mobile-subsection')) {
                 closeMenu();
            }
        });
    });

    // Accordion for mobile sub-menu
    const sectionToggles = mobileMenu.querySelectorAll('.section-toggle');
    sectionToggles.forEach(toggle => {
        toggle.addEventListener('click', () => {
            const section = toggle.parentElement;
            const subsection = section.querySelector('.mobile-subsection');

            section.classList.toggle('open');

            if (section.classList.contains('open')) {
                subsection.style.maxHeight = subsection.scrollHeight + 'px';
            } else {
                subsection.style.maxHeight = '0';
            }
        });
    });

    // Language Switcher Handler
    const langSwitcherBtn = document.getElementById('langSwitcherBtn');
    const langDropdown = document.getElementById('langDropdown');
    const langSwitcherContainer = document.querySelector('.lang-switcher-container');

    if (langSwitcherBtn && langDropdown && langSwitcherContainer) {
        langSwitcherBtn.addEventListener('click', (event) => {
            event.stopPropagation(); // Prevent the click from immediately closing the dropdown
            langSwitcherContainer.classList.toggle('open');
        });

        document.addEventListener('click', (event) => {
            if (!langSwitcherContainer.contains(event.target)) {
                langSwitcherContainer.classList.remove('open');
            }
        });

    }
});