/* General Styles */
body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background: linear-gradient(135deg, #f0f0f0, #e0e0e0);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* Heading Style */
.heading {
    font-size: 2.5rem;
    font-weight: bold;
    color: #333;
    margin: 0 0 10px;
}

/* Paragraph Style */
.mean p {
    font-size: 1.2rem;
    color: #666;
    margin: 0;
    line-height: 1.5;
}

/* Responsive Design */
@media (max-width: 600px) {
    .heading {
        font-size: 2rem;
    }

    .mean p {
        font-size: 1rem;
    }
}

/* Container Styles */
.container {
    text-align: center;
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    padding: 20px;
    width: 320px;
}

/* Board Styles */
.board {
    display: grid;
    grid-template-columns: repeat(3, 100px);
    grid-template-rows: repeat(3, 100px);
    gap: 10px;
    margin-bottom: 20px;
}

/* Cell Styles */
.cell {
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #fafafa;
    border: 2px solid #ccc;
    border-radius: 5px;
    font-size: 2.5rem;
    font-weight: bold;
    color: #333;
    cursor: pointer;
    transition: background-color 0.3s, border-color 0.3s;
}

.cell:hover {
    background-color: #e0e0e0;
    border-color: #999;
}

.cell:active {
    background-color: #d0d0d0;
}

/* Message Styles */
.message {
    font-size: 1.5rem;
    color: #333;
    margin-bottom: 20px;
}

/* Restart Button Styles */
.restart {
    padding: 10px 20px;
    font-size: 1.1rem;
    font-weight: bold;
    color: #fff;
    background-color: #007bff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
}

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

.restart:active {
    background-color: #004494;
    transform: scale(0.98);
}