html { min-height:100vh;}
body {background: linear-gradient(to right, #EF629F, #EECDA3);}
h1 { margin:150px auto 50px auto; text-align:center; color:#fff;}
#chart{
  width: 600px;
  height: 450px;
  margin: 0 auto;
  border: 1px solid #000;
  background-color:#fafafa;
}