/* Tooltip text */
.nav-item  .tooltiptext {
  visibility: hidden;
  width: 80px;
  background-color: rgba(89, 89, 87, 0.42);
  color: #fff;
  text-align: center;
  padding: 5px 0;
  border-radius: 6px;
  font-size: small;

  /* Position the tooltip text - see examples below! */
  position: absolute;
  z-index: 1;
}

/* Show the tooltip text when you mouse over the tooltip container */
.nav-item:hover .tooltiptext {
  visibility: visible;
  opacity: 0;
 transition: opacity 5s;
}