doc/overview/lib/font/OpenSans.css

@font-face {
  font-family: 'Open Sans';
  font-style: normal;
  font-weight: 400;
  src: local('Open Sans'), local('OpenSans'), url(OpenSans.ttf) format('truetype');
}
@font-face {
  font-family: 'Open Sans';
  font-style: normal;
  font-weight: 700;
  src: local('Open Sans Bold'), local('OpenSans-Bold'), url(OpenSans-Bold.ttf) format('truetype');
}
@font-face {
  font-family: 'Open Sans';
  font-style: italic;
  font-weight: 400;
  src: local('Open Sans Italic'), local('OpenSans-Italic'), url(OpenSans-Italic.ttf) format('truetype');
}
@font-face {
  font-family: 'Open Sans';
  font-style: italic;
  font-weight: 700;
  src: local('Open Sans Bold Italic'), local('OpenSans-BoldItalic'), url(OpenSans-BoldItalic.ttf) format('truetype');
}