[dmitriid]

- Every Layout: https://every-layout.dev Explains the whys and the hows.

- Inclusive Components: https://inclusive-components.design (one of the co-authors of Every Layout). Explains the whys and the hows of building proper components

Additionaly:

- BBC Gel: https://bbc.github.io/gel/ (one of the co-authors of Every Layout) also explains a lot of the whys in design of specific components

- Gov.uk is also great: https://design-system.service.gov.uk/get-started/