body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    text-align: center;
    background-color: #000; /* optional for better contrast on mobile */
    color: white;
}

#img {
    border: 2px dotted gray;
    margin: 10px auto;
    max-width: 90%;
    height: auto;
    display: block;
}

#btn,
#startBtn {
    color: blue;
    border: 2px solid blueviolet;
    padding: 10px 20px;
    font-size: 1rem;
    margin: 20px auto;
    display: block;
    max-width: 80%;
    width: fit-content;
}

#header, #timer, #score {
    border: 2px solid gray;
    padding: 10px;
    margin: 10px auto;
    max-width: 90%;
    font-size: 1.2rem;
    display: block;
}

#score {
    border: 2px dotted red;
}

/* Responsive adjustments */
@media (max-width: 600px) {
    #btn, #startBtn {
        font-size: 1rem;
        padding: 8px 16px;
    }

    #header, #timer, #score {
        font-size: 1rem;
        padding: 8px;
    }

    #img {
        max-width: 95%;
    }
}