Gotham is a Drupal 8 starter theme using Classy as a base and Gulp as a build tool. It utilizes Sass and Sass-based tools to provide a clean, modern development environment for custom theming.
This project is based on materializecss.com project,
The purpose of the theme is that sitebuilders can use out of the box,
It uses classy as base theme, gulp for compiling CSS,
the grid system is defined by the framework (similar to bootstrap).