html, body {
  margin: 0;
  padding: 0;
  overflow: hidden;
  font-family: Arial, sans-serif;
  width: 100%;
  height: 100%;
}

.chart-container {
  width: 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
}

canvas {
  width: 100% !important;
  height: 100% !important;
  display: block;
}