body {
      font-family: sans-serif;
      display: flex;
      justify-content: center;
      align-items: center;
      height: 100vh;
      margin: 0;
      background-color: #f0f0f0;
    }

    .container {
      text-align: center;
      background-color: #fff;
      padding: 20px;
      border-radius: 8px;
      box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    }

    .game-board {
      display: grid;
      grid-template-columns: repeat(3, 100px);
      grid-gap: 5px;
      margin-top: 20px;
    }

    .cell {
      width: 100px;
      height: 100px;
      background-color: #eee;
      border: 1px solid #ccc;
      font-size: 3em;
      display: flex;
      justify-content: center;
      align-items: center;
      cursor: pointer;
    }

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

    .game-status {
      margin-top: 20px;
      font-size: 1.2em;
    }

    .restart-button {
      margin-top: 20px;
      padding: 10px 20px;
      font-size: 1em;
      background-color: #4CAF50;
      color: white;
      border: none;
      border-radius: 4px;
      cursor: pointer;
    }

    .restart-button:hover {
      background-color: #3e8e41;
    }