Reference-grade survey of the named design systems (Material 3, Apple HIG, Fluent 2, Carbon, SLDS, Polaris, Atlassian, Primer, Ant, Spectrum) and the modern build stack (Tailwind, shadcn/ui, Radix/React Aria/Ark, MUI/Chakra/Mantine/Base) — each system's actual philosophy and rules, plus how to choos
Reference-grade survey of the named design systems (Material 3, Apple HIG, Fluent 2, Carbon, SLDS, Polaris, Atlassian, Primer, Ant, Spectrum) and the modern build stack (Tailwind, shadcn/ui, Radix/React Aria/Ark, MUI/Chakra/Mantine/Base) — each system's actual philosophy and rules, plus how to choose adopt-vs-adapt-vs-build.