body {
  background-color: azure;
  font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', Impact, Charcoal, sans-serif;
}

.tooltip {
  position: relative;
  display: inline-block;
}

.tooltip .tooltiptext {
  visibility: hidden;
  width: 360px;
  background-color: #fff;
  color: #555;
  border-color: #555;
  border-style: solid;
  border-width: 1px;
  text-align: center;
  border-radius: 6px;
  padding: 5px 0;
  position: absolute;
  z-index: 1;
  bottom: 75%;
  right: 50%;
  margin-left: -60px;
  opacity: 0;
  transition: opacity 0.3s;
  box-shadow: 5px 10px 18px #888888;
}

.tooltip:hover .tooltiptext {
  visibility: visible;
  opacity: 1;
}