document.addEventListener('click', function(e) {
  const btn = e.target.closest('[data-copy]');
  if (!btn) return;
  const text = btn.getAttribute('data-copy');
  if (!text) return;
  if (navigator.clipboard && navigator.clipboard.writeText) {
    navigator.clipboard.writeText(text).catch(() => fallbackCopy(text));
  } else {
    fallbackCopy(text);
  }
});

function fallbackCopy(text) {
  const ta = document.createElement('textarea');
  ta.value = text;
  ta.style.position = 'fixed';
  ta.style.opacity = '0';
  document.body.appendChild(ta);
  ta.select();
  try { document.execCommand('copy'); } catch (e) {}
  document.body.removeChild(ta);
}