html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
  width: 100%;
  background: rgb(220,220,220);
}
canvas {
  display: block;
}

main {
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

#webcam{
  display: none;
}

#help-container {
  position:absolute;
  width: 100%;
  height: 100%;
  display:flex;
  align-items: center;
  justify-content: center;
}