// Intersection Observer for Table of Contents highlighting
document.addEventListener('DOMContentLoaded', function() {
    const sections = document.querySelectorAll('.policy-section');
    const tocLinks = document.querySelectorAll('.toc-link');
    
    // Create intersection observer
    const observerOptions = {
        root: null,
        rootMargin: '-20% 0px -80% 0px', // Trigger when section is near top
        threshold: 0
    };
    
    const observer = new IntersectionObserver((entries) => {
        entries.forEach(entry => {
            if (entry.isIntersecting) {
                // Remove active class from all links
                tocLinks.forEach(link => {
                    link.classList.remove('active');
                });
                
                // Add active class to current link
                const activeLink = document.querySelector(`.toc-link[href="#${entry.target.id}"]`);
                if (activeLink) {
                    activeLink.classList.add('active');
                }
            }
        });
    }, observerOptions);
    
    // Observe all sections
    sections.forEach(section => {
        observer.observe(section);
    });
    
    // Smooth scroll for anchor links
    document.querySelectorAll('a[href^="#"]').forEach(anchor => {
        anchor.addEventListener('click', function (e) {
            e.preventDefault();
            const target = document.querySelector(this.getAttribute('href'));
            if (target) {
                const headerOffset = 100;
                const elementPosition = target.getBoundingClientRect().top;
                const offsetPosition = elementPosition + window.pageYOffset - headerOffset;
                
                window.scrollTo({
                    top: offsetPosition,
                    behavior: 'smooth'
                });
            }
        });
    });
    
    // Update copyright year dynamically
    const yearElements = document.querySelectorAll('.current-year');
    yearElements.forEach(el => {
        el.textContent = new Date().getFullYear();
    });
    
    // Mobile menu toggle (if needed in future)
    const mobileMenuBtn = document.getElementById('mobile-menu-btn');
    const mobileMenu = document.getElementById('mobile-menu');
    
    if (mobileMenuBtn && mobileMenu) {
        mobileMenuBtn.addEventListener('click', function() {
            mobileMenu.classList.toggle('hidden');
        });
    }
});

// Print functionality
function printPolicy() {
    window.print();
}