html,body {
  width: 100%;
  height: 100%;
  margin: 0px;
  padding: 0px;
  display: flex;
  justify-content: center;
  align-items: center;
}

html {
  flex-direction: column;
}

main {
  text-align: center;
  width: 100%;
}

body {
  flex-direction: row;
  overflow: hidden;
  touch-action: none;
  background: #222222;
}

canvas {
display: block;
}


main {
align-items: center;
display: flex;
height: 100vh;
justify-content: center;
}
main canvas { 
height: auto !important;
width: auto !important;
max-width: 100%;
max-height: 100%;
display: inline-block;
margin: 0 auto;
vertical-align: middle;
touch-action: none;
}