Document NPS typography (Rawlinson/Frutiger) and editorial style guide

Noted for completeness in docs/nps-resources.adoc — both proprietary/
licensed fonts, unlike the SIL OFL Noto Sans already vendored, so not
adoptable. The editorial style guide is NPS's own writing/terminology
conventions, not a design or code resource, included only since it was
shared alongside the typography notes.

docs/nps-resources.adoc

@@ -230,6 +230,30 @@ roads," not OSM's `highway=*` tagging scheme — informative as design
 reference, not directly portable onto our OSM-derived data without
 reinterpreting the mapping ourselves.
 
+== Typography & editorial standards
+
+Part of the NPS graphic identity, alongside Park Tiles — noted for
+completeness, but not adoptable and not directly relevant to this app's
+own work (a map viewer, not a publisher of NPS-branded content):
+
+* *Typefaces*: the standards specify two — *NPS Rawlinson* (licensed to
+  NPS by its creator, Terminal Design) and *Frutiger* (licensed from
+  Adobe Systems). Both proprietary/commercially licensed, unlike the
+  fonts this app already vendors (Noto Sans, SIL OFL — see
+  `docs/third-party-notices.adoc`) — not something to pull in.
+* *Hawaiian typography*: NPS Rawlinson includes vowels with Hawaiian
+  macrons (ā, ē, ī, ō, ū) and the okina (ʻ); the regular weight of
+  Frutiger doesn't, so NPS uses a separate "HFrutiger" weight for
+  Hawaiian-language text in official materials.
+* *Editorial style guide*:
+  https://www.nps.gov/subjects/hfc/hfc-editorial-style-guide.htm — HFC's
+  writing/terminology conventions (capitalization, place names,
+  Spanish-language guidance, disability language, etc.), built on top of
+  the Chicago Manual of Style, AP Stylebook, and GPO Style Manual. A
+  content style guide for NPS's own written materials, not a design/code
+  resource — included here only because it was shared alongside the
+  typography notes above.
+
 == NPMap4 (the older, Leaflet-based generation)
 
 https://www.nps.gov/lib/npmap.js/4.2.1/ — predecessor to npmap5,