.tooltiptext em {
  display: block;
  overflow: hidden;
  width: 100%;
  text-align: center;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.6);
}
.info {
  position: relative;
  display: inline-block;

  margin-left:40%;
}

.info .tooltiptext {
  visibility: hidden;
  width: 300px;
  background-color: #555;
  color: #fff;
  text-align: center;
  border-radius: 6px;
  padding: 5px 0;
  position: absolute;
  z-index: 1;
  opacity: 0;
  transition: opacity 0.3s;
  margin:10px 0 0 -75px;
}

.info .tooltiptext::after {
  content: "";
  position: absolute;
  bottom: 110%;
  left: 40%;
  margin-left: -5px;
  border-width: 5px;
  border-style: solid;
  border-color: #555 transparent transparent transparent;
}

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