body.dark-mode {
    background-color: #4f4f4f;
    color: #f0f0f0;
}

body.dark-mode input,
body.dark-mode select,
body.dark-mode textarea {
    background-color: #4f4f4f;
    color: #ffffff;
    border-color: #444;
}

body.dark-mode .form-group,
body.dark-mode .detalle-linea {
    background-color: #4f4f4f;
    border-color: #333;
}