.tooltip-circle {
  display: inline-block;
  width: 16px;
  height: 16px;
  line-height: 16px;
  text-align: center;
  font-size: 12px;
  font-weight: bold;
  color: white;
  background-color: #666;
  border-radius: 50%;
  cursor: help;
  margin-left: 4px;
  vertical-align: middle;
  transition: background-color 0.2s ease;
}

.tooltip-circle:hover {
  background-color: #333;
}