window.onload = function() {
    // Only show modal on homepage (index.php or root), not on subpages like /about, /contact, etc.
    var path = window.location.pathname.replace(/\/+$/, ''); // remove trailing slash
    var isHome = (path === '' || path === '/' || path.endsWith('/index.php'));
    if (isHome) {
      setTimeout(openModal, 4000);
    }
  }