design.js

// This file is part of YouTube Only Music.
//
// YouTube Only Music is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
//
// YouTube Only Music is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along with YouTube Only Music. If not, see <https://www.gnu.org/licenses/>.
// Copyright 2022 Kaneko Qt

document.styleSheets[0].insertRule(`#main-panel { display: none !important; }`);
document.styleSheets[0].insertRule(`.side-panel.ytmusic-player-page { max-width: unset !important; width: 100% !important; margin: unset !important; }`);
document.styleSheets[0].insertRule(`.content.style-scope.ytmusic-player-page { padding: unset !important; }`);