system-fonts/css/system-fonts.css

CSS module for utilizing system fonts

/*

  SYSTEM FONTS

*/
.system-sans-serif { font-family: -apple-system, BlinkMacSystemFont, /* MacOS and iOS */
               'avenir next', avenir, /* MacOS and iOS */
               'Segoe UI', /* Windows */
               'lucida grande', /* Older MacOS */
               'helvetica neue', helvetica, /* Older MacOS */
               'Fira Sans', /* Firefox OS */
               roboto, noto, /* Google stuff */
               'Droid Sans', /* Old Google stuff */
               cantarell, oxygen, ubuntu, /* Linux stuff */
               'franklin gothic medium', 'century gothic', /* Windows stuff */
               'Liberation Sans', /* Linux */
               sans-serif; /* Everything else */ }
/*
  References:

  https://webkit.org/blog/3709/using-the-system-font-in-web-content/
  https://en.wikipedia.org/wiki/Avenir_(typeface)
  https://www.google.com/design/spec/style/typography.html#typography-typeface
  https://core.trac.wordpress.org/ticket/36753#comment:85

*/