h1 {
  text-align: center;
}

.container {
  text-align: center;
}

.board {
  display: inline-block;
}

.row {
  display: flex;
}

.col {
  width: 70px;
  height: 70px;
  border: 1px solid #222222;
  box-sizing: border-box;
}

.bg-black {
  background-color: #222222;
}

.bg-red {
  background-color: rgb(201, 49, 49);
}