@font-face {
  font-family: 'Source Sans';
  font-stretch: 100%; /* Note that font-stretch is a % of normal width */
  font-style: normal; /* See note below */
  font-weight: 300 400 500 600 700;
  src: url(SourceSans3-VariableFont_wght.ttf) format('truetype');
}
@font-face {
  font-family: 'Source Serif';
  font-stretch: 100%; /* Note that font-stretch is a % of normal width */
  font-style: normal; /* See note below */
  font-weight: 300 400 500 600 700;
  src: url(SourceSerif4-VariableFont_opsz_wght.ttf) format('truetype');
}