body {
  background: #111;
  color: #fff;
  text-align: center;
  font-family: sans-serif;
}

h1 {
  margin-top: 20px;
}

#chessboard {
  width: 480px;
  height: 480px;
  margin: 20px auto;
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  grid-template-rows: repeat(8, 1fr);
  border: 4px solid white;
}

.square {
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  cursor: pointer;
  user-select: none;
}

.white {
  background-color: #eee;
}

.black {
  background-color: #444;
}

.selected {
  outline: 3px solid gold;
}

#turno {
  margin-top: 10px;
  font-weight: bold;
}