.mytooltip {
		  position: relative;
		  display: inline-block;
}
		.mytooltip .mytooltiptext {
		  visibility: hidden;
		  width: 400px;
		  background-color: black;
		  color: #fff;
		  text-align: center;
		  border-radius: 6px;
		  padding: 5px 0;
		  position: absolute;
		  z-index: 1;
		  top: 100%;
		  left: 50%;
		  margin-left: -200px;
}
.mytooltip:hover .mytooltiptext {
		  visibility: visible;
}