Backpech

function preloadImages(images) {
  images.forEach(src => {
    new Image().src = src;
  });
}

// Menu Mobile: Acessibilidade e controle de foco
function setupMobileMenu() {
  const openBtn = document.getElementById('mobile-menu-toggle');
  const menu = document.getElementById('mobile-menu');
  const closeBtn = document.getElementById('mobile-menu-close');

  if (!openBtn || !menu || !closeBtn) {
    console.warn("Mobile menu elements (toggle, menu, or close button) not found. Skipping setup.");
    return;
  }

  menu.setAttribute('aria-hidden', 'true');
  menu.hidden = true;
  openBtn.setAttribute('aria-expanded', 'false');

  openBtn.addEventListener('click', () => {
    menu.hidden = false;
    menu.setAttribute('aria-hidden', 'false');
    openBtn.setAttribute('aria-expanded', 'true');
    closeBtn.focus();
    document.body.classList.add('overflow-hidden'); // Prevent scrolling when menu is open
  });

  const closeMenuAction = () => {
    if (menu.hidden) return; // Avoid running if already closed
    menu.hidden = true;
    menu.setAttribute('aria-hidden', 'true');
    openBtn.setAttribute('aria-expanded', 'false');
    // Return focus to the toggle button only if it's visible and focusable
    // This check is important if the button itself could be hidden by other means
    if (openBtn && typeof openBtn.focus === 'function') {
        openBtn.focus();
    }
    document.body.classList.remove('overflow-hidden');
  };

  closeBtn.addEventListener('click', closeMenuAction);
  document.addEventListener('keydown', (e) => {
    if (!menu.hidden && e.key === 'Escape') {
      closeMenuAction();
    }
  });
}