@shopify/polaris-tokens/dist/typography.custom-properties.css

Design Tokens for the Polaris Design System

:root {
  --font-stack-base: "-apple-system, 'BlinkMacSystemFont', 'San Francisco', 'Roboto', 'Segoe UI', 'Helvetica Neue', sans-serif";
  --font-stack-monospace: "Monaco, Consolas, 'Lucida Console', monospace";
}