body {
  font-family: sans-serif;
  text-align: center;
  background: url(./imgs/mario-bg.jpg);
  background-size: cover;
  background-position: center;
}

#board {
  width: 540px;
  height: 540px;
  background: url(./imgs/soil.png);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  border: 3px solid white;
  background-size: cover;
  border-radius: 25px;
  background-repeat: no-repeat;
}

#board div {
  width: 180px;
  height: 180px;
  background-image: url(./imgs/pipe.png);
  background-size: cover;
}

#board div img {
  width: 100px;
  height: 100px;

  user-select: none;
  -moz-user-select: none;
  -webkit-user-drag: none;
  -webkit-user-select: none;
  -ms-user-select: none;
}