document.addEventListener('DOMContentLoaded', () => {
  const copyButtons = document.querySelectorAll('[data-copy]');
  copyButtons.forEach((btn) => {
    btn.addEventListener('click', () => {
      const value = btn.getAttribute('data-copy');
      if (!value) return;
      navigator.clipboard.writeText(value).then(() => {
        btn.innerText = btn.getAttribute('data-copied') || 'Copied';
        setTimeout(() => {
          btn.innerText = btn.getAttribute('data-default') || 'Copy';
        }, 1800);
      });
    });
  });
});