(function() {
  'use strict';

  const prefersReducedMotion = window.matchMedia('(prefers-reduced-motion: reduce)').matches;

  // Mobile Navigation
  const mobileToggle = document.querySelector('.mobile-toggle');
  const navLinks = document.querySelector('.nav-links');

  if (mobileToggle && navLinks) {
    mobileToggle.addEventListener('click', () => {
      const isExpanded = mobileToggle.getAttribute('aria-expanded') === 'true';
      mobileToggle.setAttribute('aria-expanded', !isExpanded);
      mobileToggle.classList.toggle('active');
      navLinks.classList.toggle('active');
      
      if (!isExpanded) {
        const firstLink = navLinks.querySelector('a');
        if (firstLink) firstLink.focus();
      }
    });

    navLinks.querySelectorAll('a').forEach(link => {
      link.addEventListener('click', () => {
        mobileToggle.setAttribute('aria-expanded', 'false');
        mobileToggle.classList.remove('active');
        navLinks.classList.remove('active');
      });
    });
    
    document.addEventListener('keydown', (e) => {
      if (e.key === 'Escape' && navLinks.classList.contains('active')) {
        mobileToggle.setAttribute('aria-expanded', 'false');
        mobileToggle.classList.remove('active');
        navLinks.classList.remove('active');
        mobileToggle.focus();
      }
    });
  }

  // Header scroll effect
  const header = document.querySelector('.site-header');

  function handleScroll() {
    const currentScroll = window.pageYOffset;
    
    if (currentScroll > 100) {
      header.classList.add('scrolled');
    } else {
      header.classList.remove('scrolled');
    }
  }

  window.addEventListener('scroll', handleScroll, { passive: true });

  // Reveal on scroll
  const revealElements = document.querySelectorAll('.reveal');
  
  if (prefersReducedMotion) {
    revealElements.forEach(el => el.classList.add('visible'));
  } else {
    const revealObserver = new IntersectionObserver((entries, observer) => {
      entries.forEach(entry => {
        if (entry.isIntersecting) {
          entry.target.classList.add('visible');
          observer.unobserve(entry.target);
        }
      });
    }, {
      threshold: 0.1,
      rootMargin: '0px 0px -50px 0px'
    });

    revealElements.forEach(el => revealObserver.observe(el));
  }

  // Smooth scroll for anchor links
  document.querySelectorAll('a[href^="#"]').forEach(anchor => {
    anchor.addEventListener('click', function(e) {
      const targetId = this.getAttribute('href');
      if (targetId === '#') return;
      
      const target = document.querySelector(targetId);
      if (target) {
        e.preventDefault();
        target.scrollIntoView({
          behavior: prefersReducedMotion ? 'auto' : 'smooth'
        });
        
        target.setAttribute('tabindex', '-1');
        target.focus({ preventScroll: true });
      }
    });
  });

  // Current year in footer
  const yearSpan = document.querySelector('.current-year');
  if (yearSpan) {
    yearSpan.textContent = new Date().getFullYear();
  }

})();