MediaWiki:Timeless.css

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/* 1. Global Page Reset - Forces the very bottom and back of the grid to black */
html, body, #mw-content-container, #mw-header-container, #mw-footer-container {
    background-color: #000000 !important;
    color: #ffffff !important;
}

/* 2. Target the Left and Right Sidebar Containers specifically */
#mw-site-navigation, #mw-related-navigation {
    background-color: #000000 !important;
}

/* 3. Target the Navigation 'Chunks' (The white boxes in your screenshot) */
.sidebar-chunk, .mw-portlet {
    background-color: #121212 !important; /* Slightly lighter so you can see them */
    border: 1px solid #333333 !important;
    color: #ffffff !important;
}

/* 4. Fix the Main Content Area and Header */
#content, .mw-header {
    background-color: #121212 !important;
    color: #ffffff !important;
    border: 1px solid #333333 !important;
}

/* 5. Force High-Contrast Colors for Text and Links */
a { color: #00FFFF !important; }       /* Cyan links */
a:visited { color: #FF00FF !important; } /* Magenta links */
.mw-body h1, .mw-body h2 { color: #FFFF00 !important; } /* Yellow headings */

/* 6. Hide the "Set $wgLogos" error image */
.mw-wiki-logo { display: none !important; }