@font-face {
  font-family: 'Open Sans';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src:
    url('OpenSans-Regular-webfont.woff2') format('woff2'),
    url('OpenSans-Regular-webfont.woff') format('woff');
}

@font-face {
  font-family: 'Open Sans';
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src:
    url('OpenSans-Italic-webfont.woff2') format('woff2'),
    url('OpenSans-Italic-webfont.woff') format('woff');
}

@font-face {
  font-family: 'Open Sans';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src:
    url('OpenSans-Bold-webfont.woff2') format('woff2'),
    url('OpenSans-Bold-webfont.woff') format('woff');
}

@font-face {
  font-family: 'Open Sans';
  font-style: italic;
  font-weight: 700;
  font-display: swap;
  src:
    url('OpenSans-BoldItalic-webfont.woff2') format('woff2'),
    url('OpenSans-BoldItalic-webfont.woff') format('woff');
}

File

core/misc/opensans/opensans.css