.question-mark-o.icon {
  color: #000;
  position: absolute;
  margin-left: 2px;
  margin-top: 2px;
  width: 15px;
  height: 15px;
  border: solid 1px currentColor;
  border-radius: 8px;
}

.question-mark-o.icon:before {
  content: '?';
  position: absolute;
  top: -2px;
  left: 3px;
  width: 17px;
  height: 1px;
}