styles.css

body {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    font-family: 'Arial', sans-serif;
    background-color: #f7f7f7;
}

.game-board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 20px;
}

.cell {
    width: 100px;
    height: 100px;
    background-color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2em;
    color: #333;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    transition: background-color 0.3s, color 0.3s;
    cursor: pointer;
}

.cell:hover {
    background-color: #e1e1e1;
}

.btn-restart {
    padding: 10px 20px;
    font-size: 16px;
    color: #fff;
    background-color: #007BFF;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
    transition: background-color 0.3s;
}

.btn-restart:hover {
    background-color: #0056b3;
}