syncthing/gui/default/assets/css/theme.css

/*
// Copyright (C) 2016 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at https://mozilla.org/MPL/2.0/.

*/

@import "../../theme-assets/dark/assets/css/theme.css" screen and (prefers-color-scheme: dark);
@import "../../theme-assets/light/assets/css/theme.css" (prefers-color-scheme: light), (prefers-color-scheme: no-preference);