MediaWiki:Common.css

/* ============================================================
   Rules for Anonymous Users (mw-user-logged-out)
   Hide all elements inside the left sidebar (#mw-panel) 
   except for the logo (#p-logo) and the main page link (#n-mainpage)
   ============================================================ */
body.mw-user-logged-out #mw-panel * {
    display: none !important;
}

/* Make sure the site logo and the main page link are displayed */
body.mw-user-logged-out #p-logo,
body.mw-user-logged-out #n-mainpage {
    display: block !important;
}

/* ============================================================
   In the personal tools (#p-personal) for logged-out users, 
   hide all items except the login link (#pt-login)
   ============================================================ */
body.mw-user-logged-out #p-personal * {
    display: none !important;
}
body.mw-user-logged-out #pt-login {
    display: inline-block !important;
}

/* ============================================================
   In the toolbox (#p-tb) for logged-out users, 
   hide all items except the print/export link (#t-print)
   ============================================================ */
body.mw-user-logged-out #p-tb * {
    display: none !important;
}
body.mw-user-logged-out #t-print {
    display: inline-block !important;
}

/* ============================================================
   Rules for Logged-In Users (mw-user-logged-in)
   Restore the full standard sidebar and tool items.
   (These rules override the above for logged-in users.)
   ============================================================ */
body.mw-user-logged-in #mw-panel * {
    display: block !important;
}
body.mw-user-logged-in #p-personal * {
    display: inline-block !important;
}
body.mw-user-logged-in #p-tb * {
    display: inline-block !important;
}