#hvg-guestbook {
    padding: 1em;
    border: 2px solid #444;
    border-radius: 10px;
    background-color: #f5252f;
    color: white;
    max-width: 400px;
    font-family: sans-serif;
}
#hvg-record-btn, #hvg-stop-btn, #hvg-upload-btn {
    margin-top: 10px;
    margin-right: 5px;
    padding: 8px 12px;
    font-size: 1em;
    border-radius: 5px;
    border: none;
    cursor: pointer;
}
#hvg-status {
    margin-top: 10px;
    font-weight: bold;
}