whynot-design/README.md

# @whynot/design

The neutral, mostly-black-and-white visual language for **whynot** — Tegwick's prototype and market-signal organisation. Wireframe-leaning. Quiet. Built for artefacts that should look deliberately unfinished.

> A prototype is a question made tangible. — `whynot-control/INTENT.md`

This repository is the **implementation surface**. The *language* of the system — voice, casing, motifs, the reasoning behind each rule — lives in this README. The *artefact* — the CSS, the components, the assets — lives in `src/` and `assets/`.

If you're new here, read these in order:

1. **`DesignSystemIntroduction.md`** — how this repo relates to `whynot-control`, the Claude atelier, and consuming apps. Pipeline, versioning, propagation.
2. **`SKILL.md`** — the Agent Skill manifest. Read this if you (or an agent) will be generating new artefacts in this style.
3. **This README** — the full design language: tokens, components, content rules, iconography.
4. **`CONTRIBUTING.md`** — how to propose, review, and ship a change.

## Quick start

```sh
# in a consuming repo
pnpm add git+ssh://git@gitea.example.com/whynot/whynot-design.git#v0.1.0
```

```jsx
// at the app root, once
import "@whynot/design/styles/colors_and_type.css";

// anywhere
import { Button, Tag, Eyebrow, StageDot } from "@whynot/design";
```

## What lives where

| Path | Contents |
|---|---|
| `tokens/` | Source-of-truth design tokens as JSON. |
| `src/styles/colors_and_type.css` | All CSS variables + semantic element styles. The single file every consumer imports. |
| `src/components/` | React components (JSX, no build step). |
| `src/index.js` | Barrel export. |
| `assets/` | Logo, mark, future imagery. |
| `examples/whynot-control/` | Live click-through UI kit. Also the Playwright visual-regression target. |

---

> The remainder of this README is the full design language — colour reasoning, type stack, content rules, iconography. It is identical to the language defined in the Claude atelier project and should stay in sync. Treat it as authoritative.


## CONTENT FUNDAMENTALS

### Voice

The voice is **quiet, structured, evidence-oriented, and careful about overclaiming**. It comes directly out of the `AGENT_RULES.md` and `OPERATING_MODEL.md`:

> Agent outputs should be concise, evidence-oriented, explicit about uncertainty, and careful to separate idea, hypothesis, signal, and decision.
>
> — `whynot-control/AGENT_RULES.md`

The voice should sound like a careful field-notebook — not a startup landing page, not a product manifesto, not marketing copy.

### Casing

- **Sentence case** for headings, buttons, labels, links — *not* Title Case. ("Smallest useful test", not "Smallest Useful Test".)
- **lowercase** for the organization name in body: `whynot`, never `WhyNot` or `WHYNOT`. The logo wordmark may use `WhyWhyNot` for legacy reasons.
- **UPPERCASE** is reserved for short eyebrow labels (`PROTOTYPE`, `SIGNAL S2`, `STAGE`, `IN BETA`) — set in mono, with letterspacing.
- **`code-case`** for repo names, doc names, folder names: `whynot-control`, `INTENT.md`, `inbox/`. Always in monospace.

### Person

**Third person, with the project as subject.** Avoid "we", avoid "you", avoid "I".

- ✅ "A prototype is a question made tangible."
- ✅ "The repository helps the user capture unusual but potentially useful ideas."
- ❌ "We help you discover weird ideas."
- ❌ "You'll love how easy this is."

Direct second-person is reserved for *imperatives in a checklist* (e.g. "Read `INTENT.md`.").

### Tone

- **Curious, not enthusiastic.** "This may be worth a closer look" beats "🚀 huge if true!".
- **Hedged, not promotional.** Use *may*, *could*, *seems*, *appears to*. Avoid *will*, *guaranteed*, *the best*.
- **Distinguish idea / hypothesis / signal / decision.** Never collapse them.
- **Lack of signal is also information.** Silence is a finding, not a failure.

### Phrasing patterns to imitate

Lifted from the existing control documents:

- "A prototype is a question made tangible."
- "Signal beats enthusiasm."
- "Signals are evidence, not vibes."
- "Capture is not commitment."
- "Low-cost learning first."
- "A prototype can be interesting and still be parked."

The pattern is: **short declarative claim → small qualifier or counter-claim**. Two beats, no exclamation.

### Phrasing to avoid

- ❌ "Revolutionize…", "Reimagine…", "Unlock…", "Empower…"
- ❌ "🚀", "✨", "🔥", any other hype emoji.
- ❌ "We believe…", "We're on a mission to…"
- ❌ "Beta — sign up now!" (use "Closed beta. Invitation only.")
- ❌ Numbers without context ("10x faster"). Use signal-record format instead.

### Examples

| ❌ Avoid | ✅ Prefer |
|---|---|
| "Get started — it's free!" | "Inbox is open. Capture is not commitment." |
| "Our amazing new prototype" | "Prototype `WNO-014`. Stage: experiment." |
| "Users love it!" | "S2 — repeated interest, three concrete use-cases." |
| "Coming soon — sign up!" | "Closed beta. Five seats. Ends 2026-04-01." |
| "🎉 Launched!" | "Promoted to Helix on 2026-03-12. See `DECISIONS.md`." |

### Emoji & punctuation

- **No emoji** in body copy, headings, or UI.
- **`?` and `!`** are the brand's punctuation — they appear in the logo and may appear, sparingly, in display headlines (`try($idea) until success;`, `why? why not!`).
- **`→`** (U+2192) for "promotes to / goes to" links between stages. Not `->`.
- **`—`** (em dash) for parenthetical, not `--`.

---

## VISUAL FOUNDATIONS

### Overall posture

The system reads like **engineering graph paper** — precise hairlines, lots of whitespace, monospace labels in margins, content blocks that look like fields in a form rather than cards in a feed. The aesthetic is closer to a Bauhaus wall-chart or a `man` page than to a SaaS dashboard.

### Color

- **Mostly black on white**, with a few flat greys.
- **One accent only**: a warm yellow (`--hi: #FFE14A`) lifted from the LEGO brick in the logo. It appears as **highlighter / annotation / signal-marker** — never as a button fill, never as a hero background.
- **No gradients.** Anywhere. Including subtle ones.
- **No tinted whites** — `--paper` is a true `#FFFFFF`; `--paper-2` and `--paper-3` are barely-warm off-whites (`#FAFAF7`, `#F4F4EF`) reserved for sheets and recessed code blocks.
- Status colors (S0–S4 signal strength) are **rendered as desaturated grey ramps**, not red/yellow/green. S4 ("commercial signal") is the only one that uses the yellow accent, because that's the threshold where a prototype actually matters commercially.

### Type

- **Family**: `IBM Plex Sans` for everything UI/body. `IBM Plex Mono` for labels, code, and stage markers. `IBM Plex Serif` for the occasional editorial pull-quote. (See font substitution note in *Fonts* below.)
- **Weights**: 300 (display only), 400 (body), 500 (UI / headings), 600 (occasional emphasis). Never 700+ — too marketing.
- **Tracking**: tight on display (`-0.035em`), neutral on body, **wide on uppercase labels** (`0.08em` — this is the one signature move).
- **Eyebrows everywhere**: short uppercase mono labels above titles (`STAGE`, `SIGNAL`, `PROTOTYPE`). They are the system's main rhythmic element.

### Spacing

- **4px base unit**, exposed as `--sp-1` (4) through `--sp-10` (128).
- Generous: a content block typically has `--sp-7` (48px) of internal padding. Lists separated by `--sp-5` (24px) minimum.
- **Section breaks are big** (`--sp-9`, 96px). Reads like a printed report.

### Backgrounds

- **`--paper` (#FFFFFF) by default.** Period.
- **`--paper-2`** for full-width "sheet" sections (e.g. between hero and content).
- **`--paper-3`** for recessed surfaces only — code blocks, inline pre, inset cards.
- **No images as backgrounds.** No hand-drawn illustrations. No repeating patterns. No textures. No noise. No grain. (Exception: a 1px hairline grid may be used on a literal "wireframe" mock; see `preview/grid-paper.html`.)

### Animation

- **Minimal.** This is a document system, not a product UI.
- Transitions on hover only: `120ms ease` on `text-decoration-color` for links, `border-color` for inputs.
- **No spring physics, no bounce, no fade-in-on-scroll.** Anything that draws attention is not in the spirit of "low-cost learning first".
- Exception: the cursor-blink animation on a `<TerminalLine>` is permitted because it's a literal terminal motif.

### Hover & press states

- **Links** — underline color goes from `--border-strong` to `--fg-1` on hover.
- **Buttons (primary, dark)** — `--ink` → `--ink-2` on hover. On press, no transform, just `--ink` (back to baseline).
- **Buttons (secondary, outline)** — border `--border` → `--ink`. On press, background flashes `--bg-3`.
- **Cards** — *do not have hover states.* They are documents, not interactive surfaces. Exception: prototype cards in an index list get a 1px black left border on hover.
- **No scale transforms**, no shadow lifts, no glow effects.

### Borders

- **1px solid `--border` (#E5E5E2)** is the default. Used everywhere.
- **`--border-strong` (#C9C9C5)** for section dividers and the outline of a primary block.
- **Hairline `--border-soft` (#F0F0EC)** for internal rules within a card.
- **No double borders, no inset borders, no dashed borders** except in one specific case: dashed `--border-strong` is used to indicate "placeholder / not yet defined" content (see Components / Empty State).

### Shadows

- **`--shadow-0`: none.** This is the default. Most cards and panels have no shadow.
- **`--shadow-1`: `0 1px 0 var(--line)`** — a 1px bottom-line, used in place of bottom-border on sticky headers.
- **`--shadow-2`: `0 1px 0 var(--line-strong)`** — slightly stronger version.
- **`--shadow-3`** is reserved for *floating* elements only (a popover, a focus-trapped modal). Even then it's a soft 4-12px diffuse shadow at 10% opacity — never a "card lift" shadow.

### Protection gradients vs capsules

- **No protection gradients.** Backgrounds are solid; never overlay a gradient to "rescue" text from a busy background, because backgrounds are never busy.
- **Capsules (pills with rounded ends)** are used only for `--label` and tag elements — never for buttons. Buttons are slightly rounded rectangles (`--r-2`, 4px).

### Layout rules

- **Single-column reading width** of ~640px for body, ~880px for documents with sidebars.
- **Constant page padding** of `--sp-7` (48px) on desktop, `--sp-4` (16px) on mobile.
- **Sticky element**: top navigation bar, height 56px, bottom hairline.
- **Sidebar (where used)**: 256px fixed width, `--paper-2` background, no border on right (uses whitespace to separate from main).
- **Grids** for structured data only — never as a "card wall". 12-column with 24px gutters.

### Transparency & blur

- **Almost never used.** No frosted glass. No backdrop-filter.
- One permitted use: a `rgba(255,255,255,0.92)` on the sticky top nav so that scrolled content is faintly visible behind it. No blur.

### Imagery

- **Black & white only.** All photography (when used) is rendered with `filter: grayscale(1) contrast(0.95)` — slightly low-contrast, like a Risograph print.
- **Aspect ratios**: 4:3 (preferred — feels like a document figure), 1:1 (for portraits / icons). Never 16:9 in body.
- **No people-stock-photography.** Prefer objects, diagrams, or screenshots.
- **No AI-generated imagery** unless explicitly labelled as such with a `[generated]` caption.

### Corner radii

- **`--r-1` (2px)** for inputs and tags.
- **`--r-2` (4px)** for buttons and small cards.
- **`--r-3` (8px)** for large cards and modals.
- **`--r-pill` (999px)** for label capsules only.
- **`--r-0` (0px / square)** is the default for documents, sheets, and any element wider than ~600px. Big things are square.

### Cards

A "card" in this system is **a bordered rectangle**, not a shadowed object floating off the page.

- 1px `--border` outline.
- `--paper` background.
- 4px or 8px radius depending on size.
- **No shadow.**
- Internal padding `--sp-5` (24px) minimum.
- A monospace eyebrow at top-left + a stage label at top-right is the canonical card header.
- On hover (when interactive): the top-left eyebrow tints to `--fg-1`, and a 2px black bar appears flush against the left edge. Nothing else moves.

---

## ICONOGRAPHY

The codebase did **not** ship an icon font, an icon sprite, or any SVG icons — `whynot-control` is a documents-only repo. The only visual asset is the LEGO-brick logo.

### Approach

- **Lucide icons via CDN** is the chosen icon set. It matches the system's stroke weight (1.5px), neutral geometry, and "wireframe artefact" feel better than Material, Heroicons, or Phosphor. Load with `<script src="https://unpkg.com/lucide@latest"></script>` and call `lucide.createIcons()`.
- **Stroke weight is always 1.5px.** Override Lucide's default 2px via `stroke-width="1.5"` on each `<svg>` or via CSS.
- **Color**: `currentColor`. Icons inherit from text. No two-tone, no fills.
- **Size**: 16px (inline), 20px (button), 24px (heading-adjacent), 32px (feature). Never larger — large icons read as decoration, and decoration is not in the spirit.

### When to use icons

- In navigation labels, button labels, and inline status — **only when the icon adds parsing speed**. If the word reads faster than the icon, skip the icon.
- In document margins to mark stage transitions (e.g. `→ Helix`).
- **Not** as decorative chrome on cards.
- **Not** as "feature icons" in a 3-up grid on a marketing page (this system has no marketing pages).

### Emoji

- **Never.** Emoji are not used anywhere — in copy, labels, alt text, or as fallback for missing icons.

### Unicode characters used as icons

These are allowed and preferred over raster icons in some contexts:

| Char | Used for |
|---|---|
| `→` | "promotes to" / pipeline arrow |
| `←` | back / previous |
| `·` | inline bullet separator (in nav, in meta lines) |
| `—` | em dash, in metadata |
| `?` `!` | the brand's signature punctuation, in display headlines only |
| `§` | section marker, in long documents |

### The logo

- The primary mark is **the LEGO brick with `?` and `!` underneath**, in pure black & white. `assets/whynot-logo.png` (300×300 raster, transparent background).
- For very small uses (favicon, footer mark), a **simplified mark** is recommended: just the `?!` pair in `IBM Plex Sans 600`, with the brick implied by a 2×4 dot grid above. See `preview/logo.html`.
- The brick should **never be coloured** (no LEGO-red, LEGO-blue, etc). It is always black-outlined on white, or white-outlined on black.
- Minimum size: 32px square. Below that, fall back to the `?!` wordmark.

---

## A note on font substitution

The control repo did not ship font files. **IBM Plex Sans / Mono / Serif** were chosen as a fresh pairing because:

- The "Plex" family was designed by IBM as an explicitly *neutral, technical-document* family — the same use-case as this system.
- All three (sans, mono, serif) share metrics, so they mix cleanly in templates and tables.
- They are openly licensed (SIL OFL) and available on Google Fonts.

Plex is currently loaded from Google Fonts (see top of `colors_and_type.css`). For offline use, drop the `.woff2` files into `fonts/` and swap the `@import` for a local `@font-face` block.

> **🟨 Substitution flagged**: there was no specified brand font; IBM Plex is a choice made here. If `whynot` later adopts a different brand font, replace `--ff-sans` / `--ff-mono` / `--ff-serif` in `colors_and_type.css` and everything downstream will follow.