html,
body {
  margin: 0;
  padding: 0;
}

body {
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  background: #000;
  text-align:center;
}

#output{
    width: 90vmin;
    height: 90vmin;
    padding: 5vmin;
}

* {
  -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;
}