body {
      font-family: Arial, Helvetica, "Liberation Sans", FreeSans, sans-serif;
      background-color: #fff;
      margin: 0;
      padding: 0;
      border-width: 0;
      cursor: pointer;
    }

    #menu {
      position: relative;
      list-style-type: none;
      padding-left: 5px;
      z-index: 1000;
      /* 1 */
      display: inline-block;
      text-align: center;
    }

    #menu li {
      margin: 2px;
      padding: 4px 10px;
      border-radius: 5px;
      background-color: #ffff80;
    }

    #menu li:hover {
      background-color: #ffDD60;
    }

    #forPuzzle {
      position: absolute;
      width: 95vw;
      height: 95vh;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      background-color:  #aae5fa;
      overflow: hidden;
    }

    .polypiece {
      display: block;
      overflow: hidden;
      position: absolute;
    }

    .moving {
      transition-property: top, left;
      transition-duration: 1s;
      transition-timing-function: linear;
    }

    .gameCanvas {
      display: none;
      overflow: hidden;
      position: absolute;
    }