(function() {
  'use strict';

  // Mobile Menu
  const mobileMenuToggle = document.querySelector('.mobile-menu-toggle');
  const mainNav = document.querySelector('.main-nav');

  if (mobileMenuToggle && mainNav) {
    mobileMenuToggle.addEventListener('click', function() {
      const isOpen = mainNav.classList.toggle('open');
      this.classList.toggle('open');
      this.setAttribute('aria-expanded', isOpen);
      document.body.style.overflow = isOpen ? 'hidden' : '';
    });

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

    // Close menu when clicking outside
    document.addEventListener('click', function(e) {
      if (mainNav.classList.contains('open') && 
          !mainNav.contains(e.target) && 
          !mobileMenuToggle.contains(e.target)) {
        mainNav.classList.remove('open');
        mobileMenuToggle.classList.remove('open');
        mobileMenuToggle.setAttribute('aria-expanded', 'false');
        document.body.style.overflow = '';
      }
    });

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

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

  // Scroll Reveal Animation
  const observerOptions = {
    root: null,
    rootMargin: '0px 0px -50px 0px',
    threshold: 0.1
  };

  const revealObserver = new IntersectionObserver(function(entries) {
    entries.forEach(function(entry) {
      if (entry.isIntersecting) {
        entry.target.classList.add('revealed');
        revealObserver.unobserve(entry.target);
      }
    });
  }, observerOptions);

  if (!prefersReducedMotion) {
    document.querySelectorAll('.reveal-fade, .reveal-slide').forEach(function(el) {
      revealObserver.observe(el);
    });
  } else {
    // If reduced motion is preferred, show all elements immediately
    document.querySelectorAll('.reveal-fade, .reveal-slide').forEach(function(el) {
      el.classList.add('revealed');
    });
  }

  // Layer animation observer for tech diagram
  const layerObserver = new IntersectionObserver(function(entries) {
    entries.forEach(function(entry) {
      if (entry.isIntersecting) {
        const layers = entry.target.querySelectorAll('.layer');
        layers.forEach(function(layer) {
          layer.classList.add('animate');
        });
        layerObserver.unobserve(entry.target);
      }
    });
  }, { threshold: 0.3 });

  const techDiagram = document.querySelector('.tech-diagram');
  if (techDiagram && !prefersReducedMotion) {
    layerObserver.observe(techDiagram);
  } else if (techDiagram) {
    techDiagram.querySelectorAll('.layer').forEach(function(layer) {
      layer.style.opacity = '1';
    });
  }

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

  function updateHeader() {
    const currentScrollY = window.scrollY;
    
    if (currentScrollY > 100) {
      header.style.background = 'rgba(26, 26, 46, 0.98)';
    } else {
      header.style.background = 'rgba(26, 26, 46, 0.9)';
    }
  }

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

  // Form handling (basic validation feedback)
  const contactForm = document.querySelector('.contact-form form');
  
  if (contactForm) {
    contactForm.addEventListener('submit', function(e) {
      e.preventDefault();
      
      // Basic validation
      const requiredFields = this.querySelectorAll('[required]');
      let isValid = true;
      
      requiredFields.forEach(function(field) {
        if (!field.value.trim()) {
          isValid = false;
          field.style.borderColor = '#ef4444';
        } else {
          field.style.borderColor = '';
        }
      });
      
      if (!isValid) {
        return;
      }
      
      const submitBtn = this.querySelector('button[type="submit"]');
      const originalText = submitBtn.textContent;
      
      // Simple visual feedback
      submitBtn.textContent = 'שולח...';
      submitBtn.disabled = true;
      
      // Simulate form submission (replace with actual form handling)
      setTimeout(function() {
        submitBtn.textContent = 'נשלח בהצלחה!';
        submitBtn.style.background = '#22c55e';
        
        setTimeout(function() {
          submitBtn.textContent = originalText;
          submitBtn.style.background = '';
          submitBtn.disabled = false;
          contactForm.reset();
        }, 2000);
      }, 1000);
    });

    // Clear error state on input
    contactForm.querySelectorAll('input, textarea, select').forEach(function(field) {
      field.addEventListener('input', function() {
        this.style.borderColor = '';
      });
    });
  }

  // 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 targetElement = document.querySelector(targetId);
      if (targetElement) {
        e.preventDefault();
        targetElement.scrollIntoView({
          behavior: prefersReducedMotion ? 'auto' : 'smooth'
        });
        // Set focus for accessibility
        targetElement.setAttribute('tabindex', '-1');
        targetElement.focus();
      }
    });
  });

  // Add staggered animation delay to grid items
  if (!prefersReducedMotion) {
    document.querySelectorAll('.expertise-grid .expertise-card, .products-grid .product-card, .advantages-grid .advantage-item, .industries-grid .industry-card').forEach(function(card, index) {
      card.style.transitionDelay = (index * 0.1) + 's';
    });
  }

})();