.allow2_copy_btn i {
  position: relative;
  width: 13px;
  display: block;
}

.allow2_copy_btn i:before {
  content: ' ';
  background-image: url('copy.svg');
  top: 0;
  left: 0;
  height: 24px;
  position: absolute;
  background-position: center;
  background-size: contain;
  width: 100%;
  background-repeat: no-repeat;
}