metamask-extension/ui/app/css/variables/typography.scss

$fa-font-path: 'fonts/fontawesome';

@import '../../../../node_modules/@fortawesome/fontawesome-free/scss/fontawesome';
@import '../../../../node_modules/@fortawesome/fontawesome-free/scss/solid';
@import '../../../../node_modules/@fortawesome/fontawesome-free/scss/regular';

@font-face {
  font-family: 'Roboto';
  font-style: normal;
  font-weight: 100;
  src: local('Roboto Thin'), local('Roboto-Thin'), url('fonts/Roboto/Roboto-Thin.ttf') format('truetype');
}

@font-face {
  font-family: 'Roboto';
  font-style: normal;
  font-weight: 300;
  src: local('Roboto Light'), local('Roboto-Light'), url('fonts/Roboto/Roboto-Light.ttf') format('truetype');
}

@font-face {
  font-family: 'Roboto';
  font-style: normal;
  font-weight: 400;
  src: local('Roboto'), local('Roboto-Regular'), url('fonts/Roboto/Roboto-Regular.ttf') format('truetype');
}

@font-face {
  font-family: 'Roboto';
  font-style: normal;
  font-weight: 500;
  src: local('Roboto Medium'), local('Roboto-Medium'), url('fonts/Roboto/Roboto-Medium.ttf') format('truetype');
}

@font-face {
  font-family: 'Roboto';
  font-style: normal;
  font-weight: 700;
  src: local('Roboto Bold'), local('Roboto-Bold'), url('fonts/Roboto/Roboto-Bold.ttf') format('truetype');
}

@font-face {
  font-family: 'Roboto';
  font-style: normal;
  font-weight: 900;
  src: local('Roboto Black'), local('Roboto-Black'), url('fonts/Roboto/Roboto-Black.ttf') format('truetype');
}

$font-family: Roboto, Helvetica, Arial, sans-serif;

// Typography
%H1 {
  font-style: normal;
  font-weight: normal;
  font-size: 2.5rem;
  font-family: $font-family;
  line-height: 140%;
}

%H2 {
  font-style: normal;
  font-weight: normal;
  font-size: 2rem;
  font-family: $font-family;
  line-height: 140%;
}

%H3 {
  font-style: normal;
  font-weight: normal;
  font-size: 1.5rem;
  font-family: $font-family;
  line-height: 140%;
}

%H4 {
  font-style: normal;
  font-weight: normal;
  font-size: 1.125rem;
  font-family: $font-family;
  line-height: 140%;
}

%H5 {
  font-style: normal;
  font-weight: normal;
  font-size: 1rem;
  font-family: $font-family;
  line-height: 140%;
}

%H6 {
  font-style: normal;
  font-weight: normal;
  font-size: 0.875rem;
  font-family: $font-family;
}

%Paragraph {
  font-style: normal;
  font-weight: normal;
  font-size: 1rem;
  font-family: $font-family;
  line-height: 140%;
}

%H7 {
  font-style: normal;
  font-weight: normal;
  font-size: 0.75rem;
  font-family: $font-family;
  line-height: 140%;
}

%H8 {
  font-style: normal;
  font-weight: normal;
  font-size: 0.625rem;
  font-family: $font-family;
  line-height: 140%;
}

%H9 {
  font-style: normal;
  font-weight: normal;
  font-size: 0.5rem;
  font-family: $font-family;
  line-height: 140%;
}