// Shared public-site behavior: scroll-reveal animations and the mobile
// nav toggle. Loaded by both index.php and menu.php.

// Reveal-on-scroll
(() => {
  if (window.matchMedia('(prefers-reduced-motion: reduce)').matches) return;

  const els = document.querySelectorAll('.reveal');
  if (!('IntersectionObserver' in window)) {
    els.forEach((el) => el.classList.add('is-visible'));
    return;
  }

  const io = new IntersectionObserver((entries) => {
    entries.forEach((entry) => {
      if (entry.isIntersecting) {
        entry.target.classList.add('is-visible');
        io.unobserve(entry.target);
      }
    });
  }, { threshold: 0.15 });

  els.forEach((el) => io.observe(el));
})();

// Mobile nav toggle
(() => {
  const toggle = document.getElementById('nav-toggle');
  const nav = document.getElementById('primary-nav');
  if (!toggle || !nav) return;

  function closeNav() {
    nav.classList.remove('is-open');
    toggle.setAttribute('aria-expanded', 'false');
  }

  function openNav() {
    nav.classList.add('is-open');
    toggle.setAttribute('aria-expanded', 'true');
  }

  toggle.addEventListener('click', () => {
    if (nav.classList.contains('is-open')) {
      closeNav();
    } else {
      openNav();
    }
  });

  // Close after following a link
  nav.querySelectorAll('a').forEach((link) => {
    link.addEventListener('click', closeNav);
  });

  // Close on Escape
  window.addEventListener('keydown', (e) => {
    if (e.key === 'Escape') closeNav();
  });

  // Close on outside click
  document.addEventListener('click', (e) => {
    if (!nav.classList.contains('is-open')) return;
    if (nav.contains(e.target) || toggle.contains(e.target)) return;
    closeNav();
  });
})();