ACCEPTANCE CRITERIA (8/8)
☑ Naming convention documented: ref-_, sys-_, comp-\* prefix system
☑ All 200+ CSS custom properties renamed following convention
☑ Backward compatibility: old names aliased to new (transition period)
☑ DS v6.0 HTML renders IDENTICALLY before and after
☑ All sections of DS v6.0 updated (colors, typography, motion, elevation, shape)
☑ Dark mode still works correctly
☑ All animations and transitions unaffected
☑ Security review passes (no sensitive data in token names)