body {
    font-family: Arial, sans-serif;
    text-align: center;
    background-color: #faf8ef;
}

.container {
    margin: 20px auto;
    max-width: 400px;
    padding: 20px;
    background-color: #bbada0;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1 {
    color: #776e65;
}

#grid-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    background-color: #cdc1b4;
    border-radius: 5px;
    padding: 10px;
    margin-top: 10px;
}

.grid-cell {
    background-color: #eee4da;
    border-radius: 5px;
    text-align: center;
    font-size: 24px;
    padding: 20px 0;
}

#score {
    margin-top: 20px;
    font-size: 20px;
}

#game-over-message {
    margin-top: 20px;
    font-size: 24px;
    color: #776e65;
}

#new-game-btn {
    margin-top: 20px;
    padding: 10px 20px;
    font-size: 16px;
    background-color: #8f7a66;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

#new-game-btn:hover {
    background-color: #a3937e;
}