* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Arial', sans-serif;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
}

.container {
    text-align: center;
    padding: 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.title {
    font-size: 2rem;
    margin-bottom: 20px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(3, 100px);
    gap: 10px;
    margin: 20px auto;
}

.cell {
    width: 100px;
    height: 100px;
    display: flex;
    justify-content: center;
    align-items: center;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    font-size: 2rem;
    cursor: pointer;
    transition: background 0.3s;
}

.cell:hover {
    background: rgba(255, 255, 255, 0.3);
}

.winner {
    margin-top: 20px;
    font-size: 1.5rem;
    font-weight: bold;
}

button {
    margin-top: 20px;
    padding: 10px 20px;
    font-size: 1rem;
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    border-radius: 10px;
    cursor: pointer;
    transition: background 0.3s;
}

button:hover {
    background: rgba(255, 255, 255, 0.4);
}

@media (max-width: 400px) {
    .grid {
        grid-template-columns: repeat(3, 80px);
    }

    .cell {
        width: 80px;
        height: 80px;
        font-size: 1.5rem;
    }
}