body {
  margin: 0;
  padding: 0;
  color: rgba(255, 255, 255, 0.87);
  background-color: #000000;
}

#app {
  position: fixed;
  inset: 0;
  width: 100%;
  /*height: 100vh;*/
  height: 100dvh;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
}

#app canvas {
  display: block;
  outline: none;
  border: none;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  touch-action: none;
  image-rendering: auto; /* smooth text/graphics */
  /* If you want pixel-art look, replace with: image-rendering: pixelated; */
  max-width: 100%;
  max-height: 100%;
}