html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #cccccc;
  font-family: Arial, Helvetica, sans-serif;
}

#app {
  width: 100%;
  height: 100%;
  overflow: auto;
  display: grid;
  place-items: center;
}

#canvasContainer {
  padding: 0;
  margin: 0;
  min-width: 50px;
  min-height: 50px;
  background: #000000;
  color: #ffffff;
  box-sizing: border-box;

  h1 {
    cursor: pointer;
  }

  canvas {
    display: block;
  }
}