/* Tic-Tac-Toe Styles */
#tic-tac-toe {
    display: grid;
    grid-template-columns: repeat(3, 100px);
    grid-gap: 5px;
    margin: 20px auto;
    width: 350px;
    text-align: center;
}

#tic-tac-toe .cell {
    width: 100px;
    height: 100px;
    border: 2px solid #000;
    font-size: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    background-color: #fff;
}

#tic-tac-toe .cell:hover {
    background-color: #f0f0f0;
}

#message {
    text-align: center;
    font-size: 18px;
    margin-top: 20px;
}


/* Pop-up Modal Styles */
.popup {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    justify-content: center;
    align-items: center;
    font-size: 20px;
    color: white;
}

.popup-content {
    background-color: #222;
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    max-width: 400px;
    margin: auto;
}

#close-btn {
    font-size: 30px;
    cursor: pointer;
    position: absolute;
    top: 10px;
    right: 10px;
    color: #fff;
}

#restart-btn {
    background-color: #4CAF50;
    border: none;
    color: white;
    padding: 10px 20px;
    margin-top: 15px;
    cursor: pointer;
    border-radius: 5px;
}

#restart-btn:hover {
    background-color: #45a049;
  }