#pong {
  width: 100%;
  height: 100%;
  position: absolute;
  left: 0;
  top: 0;

  .content {
    text-align: center;
    font: {
      family: monospace;
      size: 3em;
    }

  }

  .page-list {
    display: none;
  }
}

.pong-ball {
  width: 50px;
  height: 50px;
  left: 0;
  top: 0;
  position: absolute;
}