html,body {
height: 100%;
margin: 0;
padding: 0;
padding: 1px;
box-sizing: border-box;
}
body {
font-family: Arial;
color: #333333;
}
#chart-container {
position: relative;
height: 420px;
border: 1px solid #aaa;
margin: 0.5rem;
overflow: auto;
text-align: center;
}