1.2.2 #permalink Font family variables
Font families are not loaded from the Component Library since different themes probably use different fonts. So, these variables are setted with a default value but they must be overridden in the Theme source code.
$font-family-primary: 'Avenir Next LT Pro', Arial, Helvetica, sans-serif
$font-family-secondary: 'Avenir Next LT Pro Demi', Arial, Helvetica, sans-serif
$font-family-tertiary: 'Noto Serif JP', Arial, Helvetica, serif
Source:
scss/variables/_typography.scss, line 5