feat: add CSSOM (CSS Object Model) section#2

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SeanPlusPlus wants to merge 8 commits into

krasun:mainfrom

SeanPlusPlus:feat/add-cssom-section

Commits on Jan 5, 2026

Add placeholder CSSOM section component
Sean Stephenson
committed
Implement complete CSSOM section with interactive demo
Sean Stephenson
committed
Fix dangling comma in CSSOM description
Sean Stephenson
committed
Add specificity calculation explanation to CSSOM demo
Sean Stephenson
committed
Add note explaining specificity scores are internal browser mechanism
Sean Stephenson
committed
Replace bullet characters with proper CSS list styling
Sean Stephenson
committed
Remove unnecessary highlight styling from render-blocking text
Sean Stephenson
committed
Restore interactive demo, keep specificity in main text
Sean Stephenson
committed