.tooltip {
  position: relative;
  display: inline-block;
  border-bottom: 1px gray;
}

.tooltip .tooltiptext {
  visibility: hidden;
  width: 120px;
  background-color: lightgray;
  color: black;
  text-align: center;
 
  border-radius: 5px;
  padding: 5px 0;
  position: absolute;
  z-index: 1;
  top: -5px;
  left: 110%;
}

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

a:link {
  text-decoration: none;
}


.Div1 {
  
  border-right-style: solid;
  height: 550px;
  border-color: #3567a6;
  border-width: 1px;
}

.Div2 {
  
  border-right-style: solid;
  height: 550px;
  border-color: #3567a6;
  border-width: 1px;
}

.image-blurred-edge {
    background-image: url('cabin/images/sky4.jpg');
    width: 0px;
    height: 0px;
    /* you need to match the shadow color to your background or image border for the desired effect*/
    box-shadow: 0 0 8px 8px white inset;
}