// Mobile menu functionality
document.addEventListener('DOMContentLoaded', function() {
    const mobileMenuBtn = document.getElementById('mobile-menu-btn');
    const mobileMenu = document.getElementById('mobile-menu');
    
    if (mobileMenuBtn && mobileMenu) {
        mobileMenuBtn.addEventListener('click', function() {
            mobileMenu.classList.toggle('hidden');
            
            // Change menu icon
            const icon = mobileMenuBtn.querySelector('[data-feather]');
            if (mobileMenu.classList.contains('hidden')) {
                icon.setAttribute('data-feather', 'menu');
            } else {
                icon.setAttribute('data-feather', 'x');
            }
            feather.replace();
        });
    }
    
    // Smooth scrolling for navigation links
    const navLinks = document.querySelectorAll('a[href^="#"]');
    navLinks.forEach(link => {
        link.addEventListener('click', function(e) {
            e.preventDefault();
            const targetId = this.getAttribute('href');
            const targetElement = document.querySelector(targetId);
            
            if (targetElement) {
                const offsetTop = targetElement.offsetTop - 80; // Account for fixed navbar
                window.scrollTo({
                    top: offsetTop,
                    behavior: 'smooth'
                });
                
                // Close mobile menu if open
                if (mobileMenu && !mobileMenu.classList.contains('hidden')) {
                    mobileMenu.classList.add('hidden');
                    const icon = mobileMenuBtn.querySelector('[data-feather]');
                    icon.setAttribute('data-feather', 'menu');
                    feather.replace();
                }
            }
        });
    });
    
    // Navbar background on scroll
    const navbar = document.querySelector('nav');
    window.addEventListener('scroll', function() {
        if (window.scrollY > 50) {
            navbar.classList.add('shadow-lg');
        } else {
            navbar.classList.remove('shadow-lg');
        }
    });
    
    // Intersection Observer for fade-in animations
    const observerOptions = {
        threshold: 0.1,
        rootMargin: '0px 0px -50px 0px'
    };
    
    const observer = new IntersectionObserver(function(entries) {
        entries.forEach(entry => {
            if (entry.isIntersecting) {
                entry.target.classList.add('animate-fade-in');
            }
        });
    }, observerOptions);
    
    // Observe sections for animations
    const sections = document.querySelectorAll('section');
    sections.forEach(section => {
        observer.observe(section);
    });
    
    // Add loading animation to images
    const images = document.querySelectorAll('img');
    images.forEach(img => {
        img.addEventListener('load', function() {
            this.style.opacity = '1';
        });
    });
    
    // Typing effect for hero text (optional enhancement)
    function typeWriter(element, text, speed = 100) {
        let i = 0;
        element.innerHTML = '';
        
        function type() {
            if (i < text.length) {
                text.charAt(i element.innerHTML +=);
                i++;
                setTimeout(type, speed);
            }
        }
        type();
    }
    
    // Contact form handling (if you add a form)
    const contactForm = document.getElementById('contact-form');
    if (contactForm) {
        contactForm.addEventListener('submit', function(e) {
            e.preventDefault();
            
            // Get form data
            const formData = new FormData(this);
            const data = Object.fromEntries(formData);
            
            // Simulate form submission
            const submitBtn = this.querySelector('button[type="submit"]');
            const originalText = submitBtn.textContent;
            
            submitBtn.textContent = 'Sending...';
            submitBtn.disabled = true;
            
            setTimeout(() => {
                submitBtn.textContent = 'Message Sent!';
                setTimeout(() => {
                    submitBtn.textContent = originalText;
                    submitBtn.disabled = false;
                    this.reset();
                }, 2000);
            }, 1000);
        });
    }
    
    // Theme toggle functionality (if you want to add dark mode later)
    function toggleTheme() {
        document.body.classList.toggle('dark');
        localStorage.setItem('theme', document.body.classList.contains('dark') ? 'dark' : 'light');
    }
    
    // Load saved theme
    const savedTheme = localStorage.getItem('theme');
    if (savedTheme === 'dark') {
        document.body.classList.add('dark');
    }
    
    // Add keyboard navigation
    document.addEventListener('keydown', function(e) {
        // ESC key closes mobile menu
        if (e.key === 'Escape' && mobileMenu && !mobileMenu.classList.contains('hidden')) {
            mobileMenu.classList.add('hidden');
            const icon = mobileMenuBtn.querySelector('[data-feather]');
            icon.setAttribute('data-feather', 'menu');
            feather.replace();
        }
    });
    
    // Add performance optimizations
    // Lazy load images
    if ('IntersectionObserver' in window) {
        const imageObserver = new IntersectionObserver((entries, observer) => {
            entries.forEach(entry => {
                if (entry.isIntersecting) = entry.target;
 {
                    const img                    img.src = img.dataset.src;
                    img.classList.remove('lazy');
                    imageObserver.unobserve(img);
                }
            });
        });
        
        const lazyImages = document.querySelectorAll('img[data-src]');
        lazyImages.forEach(img => imageObserver.observe(img));
    }
    
    // Add error handling for images
    images.forEach(img => {
        img.addEventListener('error', function() {
            this.style.display = 'none';
        });
    });
    
    // Console message for developers
    console.log('%c👋 Hi there! Thanks for checking out my portfolio.', 'color: #6366f1; font-size: 16px; font-weight: bold;');
    console.log('%cIf you\'re interested in the code, feel free to reach out!', 'color: #4f46e5; font-size: 14px;');
});