For sure, thanks for pointing this out. We have https://documentation.pagedraw.io/why-not/, but we're trying to be clearer about how exactly our layout system works with https://documentation.pagedraw.io/layout/.

We give you controls to annotate your design with layout behaviors. The css we generate is 100% accurate to the constraints you specify, but our constraint system doesn't capture 100% of desired layouts (yet!)

We have 2 ways for you to control responsiveness: A flexbox-y constraint system, and media queries (Screen Size Groups). They're roughly the same controls html/css give you, though hopefully presented in a cleaner manner.