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

h1 {
    color: #333;
}

.game-board {
    display: grid;
    grid-template-columns: repeat(3, 100px);
    grid-gap: 5px;
    border: 3px solid #333;
    padding: 5px;
    background-color: #fff;
}

.cell {
    width: 100px;
    height: 100px;
    background-color: #ddd;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 3em;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

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

.cell.x {
    color: #007BFF;
}

.cell.o {
    color: #FF5722;
}

.game-status {
    margin-top: 20px;
    font-size: 1.5em;
    font-weight: bold;
    color: #333;
}

#restart-button {
    margin-top: 15px;
    padding: 10px 20px;
    font-size: 1em;
    cursor: pointer;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
}