<button title=“Toggle Theme” class=“theme-toggle”>

<svg viewBox="0 0 32 32" width="24" height="24" fill="currentcolor">
  <circle cx="16" cy="16" r="14" fill="none" stroke="currentcolor" stroke-width="4"></circle>
  <path d="
           M 16 0
           A 16 16 0 0 0 16 32
           z">
  </path>
</svg>

</button>