body {
    font-family: sans-serif;
    padding: 20px;
}

h1 {
    text-align: center;
}

#csvFileInput {
    margin-bottom: 10px;
    display: block;
    width: auto;
}

#processButton {
    padding: 10px 20px;
    cursor: pointer;
    display: block;
    width: auto;
}

#processButton:disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

#message {
    margin-top: 20px;
    font-weight: bold;
}

/* Media Query for smaller screens (e.g., mobile devices) */
@media screen and (max-width: 768px) {
    body {
        padding: 15px;
    }

    h1 {
        font-size: 1.5em;
    }

    #csvFileInput,
    #processButton {
        display: block;
        width: 90%;
        margin-left: auto;
        margin-right: auto;
        margin-bottom: 15px;
    }

    #message {
        font-size: 1em;
        margin-top: 15px;
    }
}