MediaWiki:Common.css

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/* Force global dark mode for the entire interface */
html, body {
    background-color: #121212 !important;
    filter: invert(1) hue-rotate(180deg);
}

/* Un-invert images, media, and logos so they look normal */
img, 
video, 
.mw-logo, 
.cdx-button--weight-primary,
iframe {
    filter: invert(1) hue-rotate(180deg);
}

/* Clean up background details for page content cards */
.mw-page-container {
    background-color: #ffffff !important;
}