MediaWiki:Common.css

/* CSS placed here will be applied to all skins */

@import url('https://fonts.googleapis.com/css?family=Open+Sans:400,400i,700,700i&display=swap&subset=latin-ext');

html, body
{
    font-family: 'Open Sans', sans-serif;
}
.mw-body-content
{
    font-size: unset;
}