body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #f0f0f0;
}

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

#grid {
    display: grid;
    grid-template-columns: repeat(4, 80px);
    grid-template-rows: repeat(4, 80px);
    gap: 10px;
    background-color: #ccc;
    padding: 10px;
    border-radius: 5px;
    margin: 20px 0;
}

.cell {
    width: 80px;
    height: 80px;
    background-color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 24px;
    font-weight: bold;
}

#score-display,
#highest-score-display {
    font-size: 20px;
    margin-bottom: 10px;
}

#new-game {
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
}