The @extend directive in Sass can produce undesirable side effects. David Khourshid shows how to use @extend effectively to produce clean & organized CSS.

When we work at scale, we often find that we spend a large amount of our time reading, maintaining, and refactoring existing code, rather than writing and adding new features. This is the reason we focus so much on things like architectures, naming conventions, methodologies, preprocessors, scalability, etc.: because writing CSS is easy; looking after it is not.

The more your website resembles an application over a document, the more global typography styles become a pain to build upon. Even heavily content-based websites seem more like an app in the modern world of responsive design. The solution? Just scope typographic styles:
.text h1 {...}
.text p {...}

Managing CSS at scale is hard; and a lot harder than it should be. ITCSS is a simple, effective, and as-yet unpublished methodology to help manage, maintain, and scale CSS projects of all sizes.
In this talk we’ll take a sneak peek at what ITCSS is and how it works to tame and control UI code as it grows.

certainlyakey starred CSSSR/csssr-project-template

certainlyakey starred HugoGiraudel/sass-boilerplate

certainlyakey starred bbc/gs-sass-tools

certainlyakey starred sass-mq/sass-mq

Back to architecture, shall we? I usually go with what I call the 7-1 pattern: 7 folders, 1 file. Basically, you have all your partials stuffed into 7 different folders, and a single file at the root level (usually named main.scss) which imports them all to be compiled into a CSS stylesheet.
base/ - resets and basic typography
components/ (or blocks/) - components with their separate mixins, images, variables, (also possibly scripts and markup)
layout/ - structural styling for main elements (asides, mains, headers etc.)
pages/ - styles specific to certain pages
themes/ - if site contains several color/typography themes - put here styling that should vary according to different themes
abstracts/ - common vars, functions, mixins, extends
vendors/ - external scripts or frameworks specific styling (jq-ui etc.)

Luckily for us, solutions exist to the problem of creating fast, responsive, fully customizable grids: Susy is a Sass-based grid framework. It’s very lightweight and enables you to create entirely custom grids in CSS without touching your markup.

Grandstand is a scalable front end architecture and a lightweight Sass framework. Consisting of a collection of common CSS abstractions and utility helper classes, Grandstand allows you to quickly development components in a reusable, performant manner.

certainlyakey starred bbc/gel-grid

@extend is now widely considered an anti-pattern, so its usage is thankfully fading out, but we’re not quite there yet.

certainlyakey starred at-import/breakpoint

Our Global Experience Language, (GEL), is the BBC's shared design framework which enables us to create consistent and delightful user experiences across all of our Digital Services.

I promised I’d write a blog with more details so here goes. When I started writing this I realised there was lot to say so I’m going to split this two blog posts which covers how we’re approaching CSS at BBC Sport.

Redux is a simple, truly extensible options framework for WordPress themes and plugins.

Care must be taken when implementing icon fonts to ensure a great experience for all users. What happens when your font doesn’t load? What happens when @font-face isn’t supported in the browser? We’ll show you how to implement bulletproof font icons.

Collapsible content areas are frequently presented in web sites and applications as a way to let users to control how content is shown or hidden on the page. Also called collapsibles, spin-downs, toggle panels, twisties, and content disclosures, they're ideal for selectively displaying optional information — like instructional text or additional details, for example — so users can focus on the task at hand and view this content only as needed.