// Mobile menu toggle
document.addEventListener('DOMContentLoaded', () => {
  const toggle = document.querySelector('.menu-toggle');
  const nav = document.querySelector('.nav-links');
  if (toggle && nav) {
    toggle.addEventListener('click', () => nav.classList.toggle('open'));
    // close menu when clicking a link
    nav.querySelectorAll('a').forEach(a =>
      a.addEventListener('click', () => nav.classList.remove('open'))
    );
  }

  // Highlight current nav link
  const path = location.pathname;
  document.querySelectorAll('.nav-links a').forEach(a => {
    const href = a.getAttribute('href');
    if (href === path || (href !== '/' && path.startsWith(href))) {
      a.classList.add('active');
    }
  });

  // Simple scroll-reveal for cards
  const observer = new IntersectionObserver((entries) => {
    entries.forEach(e => {
      if (e.isIntersecting) {
        e.target.style.opacity = '1';
        e.target.style.transform = 'translateY(0)';
      }
    });
  }, { threshold: 0.1 });

  document.querySelectorAll('.feature-card, .blog-card, .course-item').forEach(el => {
    el.style.opacity = '0';
    el.style.transform = 'translateY(20px)';
    el.style.transition = 'opacity .5s ease, transform .5s ease';
    observer.observe(el);
  });
});