.to-top .arrow {
  display: inline-block;
  width: 22px;
  height: 22px;
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 50%;
}

.to-top:hover .arrow {
  border-color: #fff;
}

.to-top{ display:inline-flex; align-items:center; gap: 8px; }