async function copyText(text, button) {
  try {
    await navigator.clipboard.writeText(text);
  } catch {
    const input = document.createElement("textarea");
    input.value = text;
    input.setAttribute("readonly", "");
    input.style.position = "fixed";
    input.style.left = "-9999px";
    document.body.appendChild(input);
    input.select();
    document.execCommand("copy");
    document.body.removeChild(input);
  }

  if (!button) return;
  const prev = button.textContent;
  button.textContent = "Скопировано";
  button.classList.add("is-copied");
  setTimeout(() => {
    button.textContent = prev;
    button.classList.remove("is-copied");
  }, 1500);
}

document.addEventListener("click", (event) => {
  const button = event.target.closest("[data-copy]");
  if (!button) return;
  event.preventDefault();
  const text = button.getAttribute("data-copy") || "";
  if (text) copyText(text, button);
});