metamask-extension/ui/app/css/design-system/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-face {
  font-family: 'Euclid';
  font-style: normal;
  font-weight: 400;
  src: url('fonts/Euclid/EuclidCircularB-Regular-WebXL.ttf') format('truetype');
}

@font-face {
  font-family: 'Euclid';
  font-style: italic;
  font-weight: 400;
  src: url('fonts/Euclid/EuclidCircularB-RegularItalic-WebXL.ttf') format('truetype');
}

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

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

$font-size-h1: 2.5rem;
$font-size-h2: 2rem;
$font-size-h3: 1.5rem;
$font-size-h4: 1.125rem;
$font-size-h5: 1rem;
$font-size-h6: 0.875rem;
$font-size-paragraph: 1rem;
$font-size-h7: 0.75rem;
$font-size-h8: 0.625rem;
$font-size-h9: 0.5rem;

// Typography
@mixin H1 {
  font-style: normal;
  font-weight: normal;
  font-size: $font-size-h1;
  font-family: $font-family;
  line-height: 140%;
}


@mixin H2 {
  font-style: normal;
  font-weight: normal;
  font-size: $font-size-h2;
  font-family: $font-family;
  line-height: 140%;
}

@mixin H3 {
  font-style: normal;
  font-weight: normal;
  font-size: $font-size-h3;
  font-family: $font-family;
  line-height: 140%;
}

@mixin H4 {
  font-style: normal;
  font-weight: normal;
  font-size: $font-size-h4;
  font-family: $font-family;
  line-height: 140%;
}

@mixin H5 {
  font-style: normal;
  font-weight: normal;
  font-size: $font-size-h5;
  line-height: 140%;
}

@mixin H6 {
  font-style: normal;
  font-weight: normal;
  font-size: $font-size-h6; // 14px @default
  line-height: 140%;
}

@mixin Paragraph {
  font-style: normal;
  font-weight: normal;
  font-size: $font-size-paragraph;
  line-height: 140%;
}

@mixin H7 {
  font-style: normal;
  font-weight: normal;
  font-size: $font-size-h7;
  line-height: 140%;
}

@mixin H8 {
  font-style: normal;
  font-weight: normal;
  font-size: $font-size-h8;
  line-height: 140%;
}

@mixin H9 {
  font-style: normal;
  font-weight: normal;
  font-size: $font-size-h9;
  line-height: 140%;
}