(function() {
  'use strict';

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

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

  if (navToggle && navLinks) {
    navToggle.addEventListener('click', function() {
      const isExpanded = this.getAttribute('aria-expanded') === 'true';
      this.setAttribute('aria-expanded', !isExpanded);
      this.classList.toggle('active');
      navLinks.classList.toggle('active');
      document.body.style.overflow = navLinks.classList.contains('active') ? 'hidden' : '';
    });

    // Close menu when clicking a link
    navLinks.querySelectorAll('a').forEach(function(link) {
      link.addEventListener('click', function() {
        navToggle.setAttribute('aria-expanded', 'false');
        navToggle.classList.remove('active');
        navLinks.classList.remove('active');
        document.body.style.overflow = '';
      });
    });

    // Close menu on Escape key
    document.addEventListener('keydown', function(e) {
      if (e.key === 'Escape' && navLinks.classList.contains('active')) {
        navToggle.setAttribute('aria-expanded', 'false');
        navToggle.classList.remove('active');
        navLinks.classList.remove('active');
        document.body.style.overflow = '';
        navToggle.focus();
      }
    });
  }

  // Header scroll effect
  const header = document.querySelector('.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 animations
  if (!prefersReducedMotion) {
    const revealElements = document.querySelectorAll('.reveal');
    
    const revealObserver = new IntersectionObserver(function(entries) {
      entries.forEach(function(entry) {
        if (entry.isIntersecting) {
          entry.target.classList.add('active');
          revealObserver.unobserve(entry.target);
        }
      });
    }, {
      threshold: 0.1,
      rootMargin: '0px 0px -50px 0px'
    });

    revealElements.forEach(function(el) {
      revealObserver.observe(el);
    });
  } else {
    // If reduced motion is preferred, show all elements immediately
    document.querySelectorAll('.reveal').forEach(function(el) {
      el.classList.add('active');
    });
  }

  // Smooth scroll for anchor links
  document.querySelectorAll('a[href^="#"]').forEach(function(anchor) {
    anchor.addEventListener('click', function(e) {
      const targetId = this.getAttribute('href');
      if (targetId === '#') return;
      
      const target = document.querySelector(targetId);
      if (target) {
        e.preventDefault();
        const headerHeight = header.offsetHeight;
        const targetPosition = target.getBoundingClientRect().top + window.pageYOffset - headerHeight;
        
        if (prefersReducedMotion) {
          window.scrollTo(0, targetPosition);
        } else {
          window.scrollTo({
            top: targetPosition,
            behavior: 'smooth'
          });
        }
      }
    });
  });

})();