document.addEventListener('DOMContentLoaded', () => {
    // Initialize animations
    const animatedElements = document.querySelectorAll('.fade-in, .slide-up');
    
    const observer = new IntersectionObserver((entries) => {
        entries.forEach(entry => {
            if (entry.isIntersecting) {
                entry.target.classList.add('animate');
                observer.unobserve(entry.target);
            }
        });
    }, {
        threshold: 0.1
    });

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

    // Theme toggle functionality
    const themeToggle = document.getElementById('theme-toggle');
    if (themeToggle) {
        themeToggle.addEventListener('click', () => {
            document.documentElement.classList.toggle('dark');
            localStorage.setItem('theme', document.documentElement.classList.contains('dark') ? 'dark' : 'light');
        });
    }
});