Building Pantsuit: The Hillary Clinton UI Pattern Library with Mina Markham

Mina Markham built "Pantsuit," Hillary for America’s internal design system. The core CSS architecture of Pantsuit is based around a combination of SMACSS and Harry Roberts’ ITCSS, along with his brilliant namespacing patterns. How complex are systems like this? How does a well-documented styleguide and system improve your developer's workflow?