Zurb Foundation - самый современный фреймворк для вёрстки сайтов. SCSS, mobile-first.
Документация
Foundation | The most advanced responsive front-end framework in the world.
foundation.zurb.com
Foundation for Sites | Getting started
foundation.zurb.com
Foundation for Sites 6 Docs
We built Foundation for Sites to be the most advanced responsive front-end framework in the world.
foundation.zurb.com