blockscout/assets/css/explorer/_typography.scss

$explorer-typography-styles: (
  headline: (
    "font-weight": 400,
    "font-size": 24px,
    "line-height": 32px
  ),
  title: (
    "font-weight": 400,
    "font-size": 18px,
    "line-height": 28px
  ),
  body1: (
    "font-weight": 400,
    "font-size": 13px,
    "line-height": 36px
  )
);

@mixin explorer-typography($style) {
  font-weight: map-get(map-get($explorer-typography-styles, $style), "font-weight");
  font-size: map-get(map-get($explorer-typography-styles, $style), "font-size");
  line-height: map-get(map-get($explorer-typography-styles, $style), "line-height");
}