Explanation pages in the user's HTML style (html-style) that make a concept understood rather than list an API - an algorithm, a data structure, a protocol, an architecture, a piece of math or physics, how a system or a feature works - each page in two versions switched in place (Simple - analogies, plain words, concrete numbers; Technical - precise terms, formulas, complexity, edge cases, code, sources) with diagrams (inline SVG), step-by-step animations (stepper with play / step controls), formulas (MathML, offline), interactive examples (sliders / inputs computing live results and charts, simulations checking the formulas), worked examples, pitfalls, check-yourself que…
