metamask-extension/ui/app/css/index.scss

/*
  ITCSS

  http://www.creativebloq.com/web-design/manage-large-css-projects-itcss-101517528
  https://www.xfive.co/blog/itcss-scalable-maintainable-css-architecture/
 */
@import './itcss/settings/index.scss';
@import './itcss/tools/index.scss';
@import './itcss/generic/index.scss';
@import './itcss/base/index.scss';
@import './itcss/objects/index.scss';
@import './itcss/components/index.scss';
@import './itcss/trumps/index.scss';