reseter.css/src/less/utility/system-fonts.less

Reset Browser Default Styles, Without the need to work with a blank slate. Improve Cross Browser Compatibility. Get All Benefits From Normalize.css As Well

:root {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}