Handle elements and style attributes #43

Description#

Integrate CSS parsing with the HTML pipeline. Extract CSS from <style> elements and style attributes, parse them, and feed them into the style resolution system.

Acceptance Criteria#

• During DOM construction or as a post-processing step:
  • Find all <style> elements in the document
  • Extract their text content
  • Parse each as a CSS stylesheet using the CSS parser
• Parse inline style attributes on elements into declaration blocks
• Collect all stylesheets in document order
• Pass collected stylesheets + DOM to the style resolver
• Update the browser pipeline (in browser crate) to:
  1. Parse HTML → DOM
  2. Extract and parse CSS from <style> elements
  3. Resolve styles (cascade)
  4. Pass styled tree to layout
• Write integration tests: HTML with <style> block renders with correct styles

Dependencies#

• CSS parser
• Cascade and computed style resolution
• HTML parser / DOM

Implementation Notes#

• <link rel="stylesheet"> is deferred to Phase 8 (requires network)
• For now, only <style> elements and inline style attributes