/*!
 * kiwixJS_invert.css
 * Licence GPL v3:
 *
 * Stylesheet for applying a content theme to articles extracted from a ZIM archive by Kiwix JS.
 * 
 * This is a pure generic stylesheet for inverting the display of content extracted from any ZIM.
 * The actual inversion is done in app.css by applying an inversion filter to the element in the outer document (e.g. iframe)
 * that contains the embedded article. This stylesheet re-inverts images and videos so that they do not look like
 * photographic negatives. In principle, inversion could be achieved by adding the 'html' selector to the first rule below,
 * but this causes non-WAI-compliant flashes (to white) between article loads in Service Worker mode.
 *
 * This file is part of Kiwix.
 *
 * Kiwix is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public Licence as published by
 * the Free Software Foundation, either version 3 of the Licence, or
 * (at your option) any later version.
 *
 * Kiwix 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 Licence for more details.
 *
 * You should have received a copy of the GNU General Public Licence
 * along with Kiwix (file LICENSE-GPLv3.txt).  If not, see <http://www.gnu.org/licenses/>
 */

img,
video,
canvas,
iframe[src*="youtube"],
iframe[src*="vimeo"],
iframe[src*="video"],
iframe[class*="video"],
iframe[id*="video"],
[style*="background-image:"],
[style*="background-image :"],
[style*="background: url("],
[style*="background:url("] {
    filter: invert(1) hue-rotate(180deg);
}