body {
  align-items: center;
  background: #000;
  display: flex;
  justify-content: center;
}
body,
html {
  margin: 0;
  overflow: hidden;
  padding: 0;
}
canvas { 
  max-width: 100%;
  max-height: 100%;
  display: inline-block;
  margin: 0 auto;
  vertical-align: middle;
  touch-action: none;
}

* {
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
  -moz-osx-font-smoothing: grayscale;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
}