body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #767171;
}

.gameContainer {
    max-width: 600px;
    margin: 20px auto;
    padding: 20px;
    background-color: #c7c7c7;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    text-align: center;
}

h1, h2 {
    color: #333;
}

#cellContainer{
    display: grid;
    grid-template-columns: repeat(3, auto);
    width: 225px;
    margin: auto;
}

.cell{
    width: 80px;
    height: 80px;
    border: 2px solid rgb(171, 102, 255);
    box-shadow: 0 0 0 5px;
    line-height: 75px;
    font-size: 50px;
    cursor: pointer;
}

#restartBtn {
    display: block;
    margin: 20px auto;
    padding: 10px 20px;
    background-color: #4c00be;
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
}

#restartBtn:hover {
    background-color: #3c0070;
}

/* Media queries for responsiveness */
@media (max-width: 600px) {
    .gameContainer {
        padding: 10px;
    }

    #cellContainer {
        grid-template-columns: repeat(3, 1fr);
    }

    .cell {
        width: 80px;
        height: 80px;
        font-size: 20px;
    }
}

@media (max-width: 400px) {
    .cell {
        width: 60px;
        height: 60px;
        font-size: 16px;
    }
}