MediaWiki:Common.css

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

* { font-family: times}

* { font-size: 20px }

<style>
@import url('https://fonts.googleapis.com/css2?family=New+Rocker&display=swap');
</style>

.new-rocker-regular {
  font-family: "New Rocker", system-ui;
  font-weight: 400;
  font-style: normal;
}