body {
    margin: 0;
    padding: 0;
    background-color: black;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
  }

  canvas {
    border: 2px solid white;
    background-color: white;
    width: 100%;
    height: 100%;
  }

  #difficultyButtons {
    position: absolute;
    top: 20px;
    left: 20px;
  }

  #difficultyButtons button {
    margin-right: 10px;
    font-size: 18px;
    background-color: transparent;
    border: 2px solid white;
    color: white;
    padding: 5px 10px;
    cursor: pointer;
  }

  #difficultyButtons button:hover {
    background-color: white;
    color: black;
  }