A free (libre), open-source (MIT license) HTML5 template built for responsive design. Skeleton's 12-column grid uses CSS media queries to automatically adjust page layout for the size of a viewer's screen or browser window.
A free (libre), open-source (MIT license) template for HTML5 websites, includes lots of CSS and JS tweaks and optimizations to support JQuery, Google Analytics, old browsers, and more. ·
The official CSS page at the W3 Consortium.
The "Learn & Use" page is crammed full of links to tutorials, articles, and events. The majority of resources are in English, but there appear to be a decent number in other languages as well. ·
This specification defines Cascading Style Sheets, level 2 revision 1 (CSS 2.1). CSS 2.1 is a style sheet language that allows authors and users to attach style (e.g., fonts and spacing) to structured documents (e.g., HTML documents and XML applications). By separating the presentation style of documents from the content of documents, CSS 2.1 simplifies Web authoring and site maintenance. CSS 2.1 builds on CSS2 [CSS2] which builds on CSS1 [CSS1]. It supports media-specific style sheets so that authors may tailor the presentation of their documents to visual browsers, aural devices, printers, braille devices, handheld devices, etc. It also supports content positioning, table layout, features for internationalization and some properties related to user interface. ·
"One of the most important features of style sheets is that they specify how a document is to be presented on different media: on the screen, on paper, with a speech synthesizer, with a braille device, etc." Recognized media types: all, braille, embossed, handheld, print, projection, screen, speech, tty, tv Media Groups: continuous/paged, visual/audio/speech/tactile, grid/bitmap, interactive/static ·