pixelnode/public/style.css

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
  margin: 0;
  padding: 0;
}

.display {
  height: 100%;
  width: 100%;
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  top: 0;
}