MediaWiki:Vector.css

/* ---------------------------------------------
   HIDE sidebar blocks for anonymous users only
   --------------------------------------------- */

/* Hides all sidebar blocks except the logo for anonymous users */
body:not(.mw-user-loggedin) #mw-panel .portal {
    display: none !important;
}

/* Show personal tools (login link) */
body:not(.mw-user-loggedin) #p-personal {
    display: block !important;
}

/* Ensure the logo is always visible */
body:not(.mw-user-loggedin) #p-logo,
body:not(.mw-user-loggedin) #p-logo a,
body:not(.mw-user-loggedin) #p-logo a img {
    display: block !important;
    visibility: visible !important;
}

/* Add dummy sidebar space for layout balance */
body:not(.mw-user-loggedin) #mw-panel::after {
    content: '';
    display: block;
    height: 400px;  /* Adjust this if needed */
}

/* ---------------------------------------------
   RESET sidebar visibility for logged-in users
   --------------------------------------------- */

/* Force show sidebar portals for logged-in users */
body.mw-user-loggedin #mw-panel .portal {
    display: block !important;
    visibility: visible !important;
}

/* Restore background if it was removed for anons */
body.mw-user-loggedin #mw-panel {
    background: #f8f9fa !important;
    padding-top: 1em;
}