MediaWiki:Common.css

/* CSS placed here will be applied to all skins */
element{font-family: Arial}
body.page-Help_Main_Page.action-view h1.firstHeading, body.page-Main_Page.action-view h1.firstHeading { display: none; }
div#content a.external[href ^="https://"] {
    background-image: none;
    padding-right: 0;
}