Two navigation modes for two kinds of investigation. Tap one to see how the floating TOC, back button, and flow between reports work on mobile.
Sections are real hub pages with executive summaries. Reports branch off themes and can be read in any order. TOC shows clickable theme hubs.
Reports flow in sequence through acts. Acts are structure, not content. "Next" button at the end carries you forward. TOC shows your position in the arc.