<button class="Btn">
  <svg height="1.2em" class="arrow" viewBox="0 0 512 512"><path d="M233.4 105.4c12.5-12.5 32.8-12.5 45.3 0l192 192c12.5 12.5 12.5 32.8 0 45.3s-32.8 12.5-45.3 0L256 173.3 86.6 342.6c-12.5 12.5-32.8 12.5-45.3 0s-12.5-32.8 0-45.3l192-192z"></path></svg>
<p class="text">Back to Top</p>
</button>

<style>
/* From Uiverse.io by vinodjangid07 - Tags: button, arrow, hover effect, back to top, scroll to top */
.Btn {
  width: 45px;
  height: 45px;
  background: linear-gradient(#44ea76, #39fad7);