so add  <code>rounded-pill</code> to make it a circle.</p>
<div class="flex flex-middle mb-2">
  <button class="btn-icon rounded-pill btn-warning"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" fill="currentColor" viewBox="0 0 256 256"><rect width="256" height="256" fill="none"></rect><circle cx="128" cy="128" r="96" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="20"></circle><circle cx="128" cy="176" r="16"></circle><path d="M128,136a28,28,0,1