html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
}

#embed-html {
  width: min(100vw, calc(100vh * 1.4222222222));
  height: min(100vh, calc(100vw / 1.4222222222));
  margin: 0;
  padding: 0;
  position: relative;
  overflow: hidden;
  background: #fff;
}

#embed-html canvas {
  width: 100% !important;
  height: 100% !important;
  display: block;
  image-rendering: auto;
  outline: none;
}