Ile naprawdę kosztuje Cię palenie?

<iframe
  id="flamy-savings-calculator"
  src="https://flamy.co/pl/embed/kalkulator-oszczednosci?lang=pl"
  title="Kalkulator oszczędności Flamy"
  width="100%"
  height="640"
  loading="lazy"
  referrerpolicy="strict-origin-when-cross-origin"
  style="border:0; width:100%; max-width:600px; overflow:hidden;"
></iframe>
<script>
  window.addEventListener('message', function (event) {
    var host = '';
    try { host = new URL(event.origin).hostname; } catch (e) {}
    if (host !== 'flamy.co' && !host.endsWith('.flamy.co')) return;
    if (!event.data || event.data.type !== 'flamy-resize') return;
    var iframe = document.getElementById('flamy-savings-calculator');
    if (iframe && event.data.height) iframe.style.height = event.data.height + 'px';
  });
</script>