chartInstance {
background-color: #000;
color: #fff;
font-size: 20px;
font-family: 'Arial', sans-serif;
border: 1px solid #000;
padding: 20px;
margin: 10px;
}
span {
background-color: #f00;
padding: 5px 10px;
border: 2px solid #f00;
border-radius: 10px;
}