.game-board {
  display: flex;
  flex-wrap: wrap;
  width: 300px;
  margin: 0 auto;
}

.cell {
  width: 100px;
  height: 100px;
  background-color: white;
  border: 1px solid black;
  box-sizing: border-box;
  font-size: 60px;
  text-align: center;
  line-height: 100px;
}

.cell:hover {
  background-color: #f5f5f5;
}

.game-board {
  display: flex;
  flex-wrap: wrap;
  width: 300px;
  margin: 0 auto;
}