*{
  margin:  0;
  padding: 0;
  box-sizing: border-box;
}
body{
  padding: 0.5rem;
}
div.chart{
  position: relative;
  margin: 0.5rem;
  display: inline-block;
  width:  30rem;
  height: 20rem;
  border: 2px #bbb solid;
}