body {
    font-family: Arial, sans-serif;
    text-align: center;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #f9f9f9;
  }
  
  h1 {
    color: #333;
    margin-bottom: 30px;
  }
  
  .board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(3, 1fr);
    gap: 5px;
    width: 300px;
    height: 300px;
  }
  
  .cell {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #eee;
    font-size: 48px;
    color: #333;
    cursor: pointer;
    transition: background-color 0.3s;
    width: 100%;
    height: 100%;
  }
  
  .cell[data-cell="X"] {
    color: #f00;
  }
  
  .cell[data-cell="O"] {
    color: #00f;
  }
  
  .cell.winner {
    background-color: yellow;
  }
  
  .score {
    margin-bottom: 20px;
  }
  
  .buttons {
    display: flex;
    justify-content: center;
    margin-top: 20px;
  }
  
  .buttons button {
    margin: 0 10px;
    padding: 10px 20px;
    font-size: 16px;
    background-color: #333;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
  }
  
  .buttons button:hover {
    background-color: #555;
  }

  #turnMessage {
    margin-top: 20px;
    font-size: 18px;
    color: #333;
  }