body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: flex-start;
    align-items: center;
    padding-top: 50px;
    height: 100vh;
    margin: 0;
    background-color: #f0f0f0;
}

#gameCanvas {
    border: 2px solid var(--primary-color);
    background-color: #fff;
    max-width: 100%;
    height: auto;
    margin-top: 20px;
    position: relative;
}

#startButton {
    margin-top: 20px;
    padding: 10px 20px;
    font-size: 18px;
    background-color: var(--secondary-color);
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}

#startButton:hover {
    background-color: #27ae60;
}

#score {
    font-size: 24px;
    margin-top: 20px;
}

@media (max-width: 430px) {
    .container {
        padding: 10px;
    }

    #gameCanvas {
        width: 100%;
        height: auto;
    }

    #startButton {
        font-size: 16px;
        padding: 8px 16px;
    }

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