circle.inner, circle.outer{
	cursor : pointer;
	z-index: 5;
}

.descr_hottness{
	text-align: center;
}

.tooltip {
	margin: -10px;
	text-align: center;
	position: fixed;
	transition: opacity 0.6s;
	display: block;
	line-height: 1;
	font-weight: bold;
	font-size: 16px;
	padding: 10px;
	background: rgba(50, 50, 50, 0.8);
	color: #fff;
	border: 3px double;
	z-index: 20;
}

/* Creates a small triangle extender for the tooltip */
.tooltip:after {
  box-sizing: border-box;
  display: inline;
  font-size: 10px;
  width: 100%;
  line-height: 1;
  color: rgba(255, 255, 255, 0.8);
  content: "\25BC";
  text-align: center;
}

/* Style northward tooltips differently */
.tooltip.n:after {
  margin: -1px 0 0 0;
  top: 100%;
  left: 0;
}