Update to Three Candidate Recommendations of CSS Working Group

The CSS Working Group invites implementations of three updated Candidates Recommendations: CSS Counter Styles Level 3: This module introduces the '@counter-style' rule, which allows authors to define their own custom counter styles for use with CSS list-marker and generated-content counters [CSS-LISTS-3]. It also predefines a set of common counter styles, including the ones present in CSS2 and CSS2.1. CSS Grid Layout Module Level 1: This CSS module defines a two-dimensional grid-based layout system, optimized for user interface design. In the grid layout model, the children of a grid container can be positioned into arbitrary slots in a predefined flexible or fixed-size layout grid. CSS Scroll Snap Module Level 1: This module contains features to control panning and scrolling behavior with “snap positions”. CSS is a language for describing the rendering of structured documents (such as HTML and XML) on screen, on paper, in speech, etc.