div.tooltip-heatmap {	
  position: absolute;			
  text-align: center;			
  width: 60px;					
  height: 40px;					
  padding: 2px;				
  font: 12px sans-serif;		
  background: #ABCBF5;	
  border: 0px;		
  border-radius: 8px;			
  pointer-events: none;			
}

.x_label, .y_label{
  cursor: pointer;
}
