.pane-button {
    border: none;
    border-radius: 4px;
    padding: 4px 8px;
    font-size: 16px;
    color: white;
    background-color: #5a6268;
}

#convert,
#download {
    background-color: #218838;
}

#guidebtn {
    background-color: #0069d9;
}

#guide-ok-btn {
    border: 1px solid #b4b4b4;
    border-radius: 8px;
    color: white;
    background-color: #218838;
    padding: 8px 16px;
    font-size: 20px;
}

#guide-ok-btn:hover,
.pane-button:hover {
    filter: brightness(85%);
    transition: 0.2s;
}