Order tool: fan funding; deck: light and dark, 60/40 shareholding

User, 20 Oct 2026: can the deck also be made in a light and dark mode;
the new order tool should also offer fan funding, so the platform
screenshots match and use the same calculator; the main investor holds
at least 60 %, so 40 % is for sale.

Order tool (docs/order.html, /demos/order/):
- New step 15 "How to pay": pay the plant directly (deposit) or let
  fans fund it; step 16 becomes "Review & launch" with the campaign
  simulation and its three outcomes.
- Campaign maths ported from make-a-record (fan price, length, cap, own
  copies, VAT; fans needed = max(100, break-even); keep at the goal and
  with more fans; price hint); R gains fee (3.5 %), VAT and campaign
  length with sources; no price changed.
- Quote card shows fan price, fans needed and the artist's keep on the
  fan route; route and campaign in the #q= hash; deep links
  #s=<step>&p=<preset>&route=fans.
- Parity with make-a-record: 206/206 checks over 40 configurations;
  default quotes unchanged (37,836 / 217 / 102,936 THB; partner
  mastering 43,676).

Investor deck (docs/pitch/):
- Light and dark theme like the other site pages (cnx-theme, T key and
  button), presenter and overview follow; charts from CSS variables;
  text pairs at WCAG AA in both themes; tool screenshots in both themes.
- Two PDFs: dark and light (print-friendly), each ~1.5 MB.
- Platform slide: both pictures from the order tool (Splatter 12" order
  step and its fan-funding view: 100 fans at 1,200 THB, break-even 46,
  ~480 THB a copy kept).
- BOI and financing slide: shareholding bar, lead investor at least 60 %,
  at most 40 % for co-investors (~32M / ~22M THB at the ~54M equity
  floor, arithmetic only); the ask offers up to 40 %.

Docs: artist-platform.md (fan funding in the order tool), README and
landing page entries.

README.md

@@ -211,8 +211,9 @@ The detail lives in dedicated documents:
   enough have pre-ordered, with refunds if not
 - [Order a record](docs/order.html): the order tool as a step-by-step
   configurator after the Mobineko pattern (step rail, choices, a large live
-  record picture, running price and ship date, review with what is
-  missing); same price list as the artist demos
+  record picture, running price and ship date, a "how to pay" step with
+  direct payment or a fan-funded campaign on make-a-record's calculator,
+  review with what is missing); same price list as the artist demos
 - [Artist ordering demo](docs/artist-order.html): the artist platform as a
   clickable single page: configure a record (jacket with a 3 or 5 mm
   spine), type the track list or drop the master files and artwork
@@ -322,9 +323,10 @@ The detail lives in dedicated documents:
   caveats behind the numbers
 - [Investor deck](docs/pitch/index.html) (October 2026): the plant in 16
   web slides for BOI, bank and institutional readers, proposing Plan B
-  (~215M THB) with Plan A as the comparison, with a
-  presenter view (press P) and a
-  [PDF](docs/pitch/CNX-Vinyl-Investor-Deck.pdf); every figure carries its
+  (~215M THB) with Plan A as the comparison, in a light and a dark theme
+  (press T), with a presenter view (press P) and a PDF of each theme
+  ([dark](docs/pitch/CNX-Vinyl-Investor-Deck.pdf),
+  [light](docs/pitch/CNX-Vinyl-Investor-Deck-light.pdf)); every figure carries its
   source in the business plan or the owning doc
 - Business plan, draft 0.3 (October 2026), in two versions:
   [Plan A, ~180M THB](docs/business-plan/CNX-Vinyl-Business-Plan-A.pdf)