.tooltip-chart {
  position: fixed;
  z-index: 1000;
  transform: translate(-50%, -120%);
  padding: 10px;
  background-color: white;
  border-radius: 5px;
  text-align: center;
  min-width: 100px;
  border: 1px solid #000;
  box-shadow: 0 0 10px 5px #000;
}