Repaint to jet-black + atomic-tangerine skin, add consultant-special 2×2

Why: the default skin was too warm/neutral and the pyramid + venn never
quite read the way they should. Also prepping for public sharing, so the
example diagrams needed to drop the littlemight-specific copy.

Changes:
- New five-color palette: jet-black ink, atomic-tangerine accent,
  white-smoke paper, blue-slate muted, silver hairlines. Replaces
  warm-stone + rust across every variant + dark-mode tokens.
- Default background is clean paper; dot grid + framed container are
  now opt-in variants (uncomment in template to enable).
- New consultant-special quadrant variant (example-quadrant-consultant.html)
  — 2×2 scenario matrix with named cells, double-ended axes, one focal
  quadrant; house skin, not a separate visual language.
- Pyramid redrawn as a true triangular silhouette with shared edges on
  one slope (stacked polygons on a single triangle outline, no kinks).
- Venn redesigned: dark-fill triple-intersection with white text,
  circle labels moved inside non-overlap lobes, pair-overlap labels
  removed, legend dropped.
- Example content genericized (content site / product timeline /
  content platform instead of littlemight-branded copy).
- Screenshots regenerated at 2× DPI; added quadrant-consultant.png
  (14th diagram in the gallery).
- README: hero-first opener, preserved Why-I-built-it section, UTM
  tags on littlemight + bestself links, palette description updated.

references/type-quadrant.md

@@ -18,3 +18,55 @@
 - `assets/example-quadrant.html` — minimal light
 - `assets/example-quadrant-dark.html` — minimal dark
 - `assets/example-quadrant-full.html` — full editorial
+- `assets/example-quadrant-consultant.html` — consultant special (see below)
+
+---
+
+## Consultant special (2×2 scenario matrix)
+
+A **layout variant** of the standard quadrant — same house skin (warm paper, dot pattern, Instrument Serif title, Geist mono eyebrows, coral focal rule). The grammar shifts: axes hold a **range** rather than a measurement; cells hold **named scenarios** rather than positioned items.
+
+**Use when:** you're framing four futures, archetypes, or strategic options across two independent drivers — classic scenario planning, positioning frames, or 2×2 strategy decks (BCG/McKinsey territory). The reader should come away with four named bets, not a point cloud.
+
+**Do not use** for prioritization, density maps, or anything where the *position inside* a cell carries meaning — that's the standard quadrant above.
+
+### What makes it the consultant variant
+
+| Move | Standard quadrant | Consultant special |
+|---|---|---|
+| Axis arrows | single-ended (→ HIGH EFFORT) | **double-ended** (← LOW ↔ HIGH →) |
+| Cell content | small dots with labels | **named scenario + 1–3 line description** |
+| Quadrant corner | short tag (e.g. DO FIRST) | **numbered tag + axis combination** (`01 · HIGH / LOW`) |
+| Focal accent | coral on one *item* | coral on one *quadrant* — tinted bg + coral stroke + coral corner tag |
+| Axes | 1px muted ink | **1.2px ink** (slightly heavier — the axes carry more of the figure) |
+
+Everything else — paper, dot pattern, typography, legend strip, 4px grid, complexity budget — is the house default. Don't invent new colors or fonts for this variant.
+
+### Style tokens (in-house)
+
+- **Paper / bg / pattern**: defaults from `style-guide.md` (`paper`, 22×22 dot pattern at 10% ink).
+- **Axis lines**: `ink` (`#2d3142`), `stroke-width: 1.2`, `marker-start` + `marker-end` both pointing outward.
+- **Focal quadrant tint**: `rgba(235,108,54,0.04)` full rect behind the focal cell.
+- **Focal cell**: `accent-tint` fill, `accent` stroke at 1.2px. Corner tag in `accent`, weight 600.
+- **Non-focal cells**: `store` treatment (`ink @ 0.04` fill, `muted @ 0.28` stroke).
+- **Cell title**: Geist sans, 16px, weight 600, `ink`.
+- **Cell description**: Geist sans, 11px, `muted`, 1–3 lines, left-aligned inside the cell.
+- **Corner tag**: Geist Mono, 8px, uppercase, tracked `0.18em`, `muted` (or `accent` on focal).
+- **Axis labels**: two-line — `↑ DRIVER NAME` in Geist Mono 9px weight 600 uppercase tracked, `range` sublabel in Geist Mono 9px regular `muted`.
+
+### Layout conventions
+
+- Four cells, equal size (240×160 or 280×180 are good defaults), arranged with a 40–60px gap from the axis cross.
+- Axis cross passes *between* the cells, not through them.
+- Arrow tips live ~20–40px outside the outermost cell edge; two-line axis labels beyond the tips.
+- Exactly one focal cell. Picking none makes it a placeholder template; picking two erases the signal.
+- Keep the legend strip + horizontal rule at the bottom — same as the standard quadrant. Legend swatches should show both "headline bet" (coral) and "candidate future" (neutral).
+
+### Anti-patterns (variant-specific)
+
+- Plain white background — the warm paper + dot pattern is load-bearing across the skill; dropping it to "look consultant" turns the diagram generic.
+- Sans-serif H1 — keep Instrument Serif for the page title. The title/diagram contrast is the house signature.
+- Unnamed cells ("Scenario 1/2/3/4") in a shipped diagram — OK as a blank template; not OK as a finished artifact.
+- Coral on more than one cell — same focal rule as everywhere else in the skill.
+- 3×3 or 2×3 grids — those are different diagrams, not this variant.
+- Positioning dots *inside* the cells — if position matters, use the standard quadrant.