body {
            font-family: Arial, sans-serif;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            height: 100vh;
            margin: 0;
          }

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

          .cell {
            width: 100px;
            height: 100px;
            background-color: #f0f0f0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            cursor: pointer;
          }

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

          button {
            margin-top: 20px;
            padding: 10px 20px;
            font-size: 18px;
            cursor: pointer;
          }