(function () {
  var modal = document.getElementById('bb-donate-modal');
  if (!modal) return;
  var lastFocus = null;

  function openModal(e) {
    if (e) e.preventDefault();
    lastFocus = document.activeElement;
    modal.setAttribute('aria-hidden', 'false');
    document.body.classList.add('bb-modal-open');
    var c = modal.querySelector('[data-bb-close]');
    if (c) c.focus();
  }

  function closeModal() {
    modal.setAttribute('aria-hidden', 'true');
    document.body.classList.remove('bb-modal-open');
    if (lastFocus) lastFocus.focus();
  }

  document.addEventListener('click', function (e) {
    if (!e.target || !e.target.closest) return;
    if (e.target.closest('.js-donate, a[href*="host.nxt.blackbaud.com"]')) { openModal(e); return; }
    if (e.target.closest('[data-bb-close]') || e.target === modal) closeModal();
  });

  document.addEventListener('keydown', function (e) {
    if (e.key === 'Escape' && modal.getAttribute('aria-hidden') === 'false') closeModal();
  });
})();