html,
body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
}

.leaflet-control-chart {
    width: calc(100vw - 20px);
    height: 200px;
    background-color: rgba(255, 255, 255, 0.5);
}

.leaflet-control-chart canvas {
    width: 100%;
    height: 100%;
}