body {
  font: 10px sans-serif;
  color: #fff;
  background-color: #333;
}

svg {
fill: solid 1px #ccc;
font: 10px sans-serif;
}

div.tooltip {   
  position: absolute;           
  text-align: center;           
  width: 60px;                  
  height: 28px;                 
  padding: 2px;             
  font: 12px sans-serif;        
  background: #111;   
  border: 0px;      
  border-radius: 8px;           
  pointer-events: none;         
}