MediaWiki:Common.css

.mw-wiki-logo {
    background-size: cover;
}
#mw-content-container {
    background-image: none;
}
.printfooter, #siteSub {
    display: none;
}

body.anonymous #site-tools,
body.anonymous #bodyContentOuter .mw-portlet-body,
body.anonymous #n-recentchanges,
body.anonymous #n-randompage,
body.anonymous #n-help-mediawiki,
body.anonymous #mw-related-navigation
 {
    display: none;
}