if (!document.body) return;

const observer = new MutationObserver(() => {
  const overlay = document.querySelector('.payok__wrap');
  if (!overlay) return;

  const freeRadio = overlay.querySelector('input[name="pay-ok"][value="ok"]');
  const submitBtn = overlay.querySelector('button.payok__submit');
  if (!freeRadio || !submitBtn) return;

  observer.disconnect();
  freeRadio.click();
  setTimeout(() => submitBtn.click(), 100);
});

observer.observe(document.body, { childList: true, subtree: true });