body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #000;
    color: #fff;
    font-family: Arial, sans-serif;
    margin: 0;
}

.game-container {
    text-align: center;
}

h1 {
    color: #00ffcc;
    text-shadow: 0 0 10px #00ffcc, 0 0 20px #00ffcc;
}

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

.cell {
    width: 100px;
    height: 100px;
    background-color: #1a1a1a;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2rem;
    cursor: pointer;
    box-shadow: 0 0 20px #00ffcc;
    transition: background-color 0.3s;
}

.cell:hover {
    background-color: #333;
}

button {
    padding: 10px 20px;
    font-size: 1rem;
    color: #00ffcc;
    background-color: #000;
    border: 2px solid #00ffcc;
    cursor: pointer;
    transition: background-color 0.3s, color 0.3s;
}

button:hover {
    background-color: #00ffcc;
    color: #000;
}