/* Hide top bar completely */
#title_wrapper, .top_bar, .header { display: none !important; }

/* Hide all buttons */
#sf_upload, #file_upload, #demo_song, #download_button, 
.export_button, .save_audio, #save_audio {
    display: none !important;
}

/* Hide controller area */
#midi_and_sf_controller, .controller_container {
    display: none !important;
}

/* Hide status messages */
.status_message, .warning_div {
    display: none !important;
}

/* Hide footer/menu */
.footer_menu, .menu_button, .settings_button {
    display: none !important;
}