// Mobile menu toggle
document.addEventListener('DOMContentLoaded', function() {
    const mobileMenuToggle = document.querySelector('.mobile-menu-toggle');
    const navMenu = document.querySelector('.nav-menu');
    
    if (mobileMenuToggle && navMenu) {
        mobileMenuToggle.addEventListener('click', function() {
            navMenu.classList.toggle('active');
            mobileMenuToggle.setAttribute('aria-expanded', 
                navMenu.classList.contains('active'));
        });
        
        // Close menu when clicking outside
        document.addEventListener('click', function(event) {
            if (!event.target.closest('nav') && navMenu.classList.contains('active')) {
                navMenu.classList.remove('active');
                mobileMenuToggle.setAttribute('aria-expanded', 'false');
            }
        });
    }
    
    // Contact form handling
    const contactForm = document.getElementById('contactForm');
    const formMessage = document.getElementById('formMessage');
    
    if (contactForm && formMessage) {
        contactForm.addEventListener('submit', function(e) {
            e.preventDefault();
            
            // Simple validation
            const name = document.getElementById('name').value;
            const email = document.getElementById('email').value;
            const subject = document.getElementById('subject').value;
            const message = document.getElementById('message').value;
            
            if (!name || !email || !subject || !message) {
                formMessage.textContent = 'Please fill in all fields.';
                formMessage.className = 'form-message error';
                return;
            }
            
            // Email validation
            const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
            if (!emailRegex.test(email)) {
                formMessage.textContent = 'Please enter a valid email address.';
                formMessage.className = 'form-message error';
                return;
            }
            
            // Simulate form submission
            formMessage.textContent = 'Thank you for your message! We\'ll get back to you soon.';
            formMessage.className = 'form-message success';
            
            // Reset form
            contactForm.reset();
            
            // Clear message after 5 seconds
            setTimeout(() => {
                formMessage.textContent = '';
                formMessage.className = 'form-message';
            }, 5000);
        });
    }
    
    // Smooth scrolling for anchor links
    document.querySelectorAll('a[href^="#"]').forEach(anchor => {
        anchor.addEventListener('click', function(e) {
            e.preventDefault();
            const targetId = this.getAttribute('href');
            if (targetId === '#') return;
            
            const targetElement = document.querySelector(targetId);
            if (targetElement) {
                targetElement.scrollIntoView({
                    behavior: 'smooth',
                    block: 'start'
                });
            }
        });
    });
    
    // Current page highlighting
    const currentPage = location.pathname.split('/').pop();
    const navLinks = document.querySelectorAll('.nav-menu a');
    
    navLinks.forEach(link => {
        const linkPage = link.getAttribute('href');
        if (currentPage === linkPage || (currentPage === '' && linkPage === 'index.html')) {
            link.classList.add('active');
        } else {
            link.classList.remove('active');
        }
    });
    
    // Lazy loading for images (would be implemented with actual images)
    if ('IntersectionObserver' in window) {
        const lazyImages = document.querySelectorAll('img[data-src]');
        
        const imageObserver = new IntersectionObserver((entries, observer) => {
            entries.forEach(entry => {
                if (entry.isIntersecting) {
                    const img = entry.target;
                    img.src = img.dataset.src;
                    img.classList.remove('lazy');
                    imageObserver.unobserve(img);
                }
            });
        });
        
        lazyImages.forEach(img => {
            imageObserver.observe(img);
        });
    }
});