body {
  margin: 0;
  padding: 0;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

canvas {
  max-width: 100%; 
  max-height: 100%;
  /*width: auto !important;
  height: 100% !important;*/
  object-fit: contain;
  
  margin: auto;
  overflow: auto;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
}