/*Additional Stuff*/
.tooltiptext {
  visibility: hidden;
  width: 120px;
  background-color: rgba(0,0,0,.8);
  color: #fff;
  text-align: center;
  padding: 5px 0;
  border-radius: 6px;
  font-size: .8rem;
  font-weight: 300;
 
  /* Position the tooltip text - see examples below! */
  position: absolute;
  z-index: 1;
  bottom: 100%;
  left: 50%;
  margin-left: -60px;
}

.tooltiptext b{
  font-weight: 500;
}

/* Show the tooltip text when you mouse over the tooltip container */
.circle:hover .tooltiptext {
  visibility: visible;
}
/* End of additional stuff*/