Sprocket

# Sprocket

## Philosophy

Sprocket threads live operations through a film projector: every metric is a frame on a sprocket-perforated strip, captioned where it sits and advanced on one shared mechanism, so an operator reads a control room like a screening rather than a scoreboard. A warm bone-parchment daylight ground (a printed cinema programme, not a dark room), deep oxblood ink, and one electric amber that reads like the projector beam.

### Values

- editorial pacing before decorative futurism
- data sequenced on one reel and captioned in place, not stacked as identical tiles
- warm daylight atmosphere with accessibility-aware contrast
- cinematic worldbuilding through measured typographic restraint, not neon

### Anti-Values

- arcade neon overload without information structure
- generic dashboard cards with a palette pasted on top
- dark control-room cliche; the daylight bone ground is the identity
- skeuomorphic cockpit clutter that defeats reading flow

### Visual Character

- A warm bone-parchment field carries a dark sprocket-perforated film-leader band as its spine; metrics ride that reel as captioned cells, sequenced left to right like film rather than floating as isolated cards.
- Perforation rails run down the left and right margins, framing the page as film stock; the landing hero is a full-bleed projector with an amber halation beam and the same film edges.
- Every focal cell carries an oxblood corner crosshair registration tick instead of a boxed border, reading as a frame mounted on a light table.
- An optical Fraunces serif narrates, a tight Inter Tight grotesk runs operations, and a tabular Space Mono types the cues, timestamps, and indexes — three voices on one strip.
- Charts and timelines sit over a faint instrument-grid and scanline scaffold with an amber playhead and crosshair registration, so data reads instrumented without sci-fi chrome.
- Controls reveal through ink fill, hairline brightening, and a single measured amber ring; the amber is one signal, used like the projector beam, never a flood.

## Tokens

### Colors

| Name | Value |
|------|-------|
| primary | `#7A1B22` |
| secondary | `#E8761A` |
| accent | `#E8761A` |
| background | `#F4EFE6` |
| surface | `#FBF8F2` |
| text | `#1A1410` |
| muted | `#6E5F52` |
| border | `#D8CDBC` |
| error | `#B23A2E` |
| success | `#2F7D52` |
| warning | `#B5781A` |
| info | `#345C8A` |
| strip | `#231012` |
| strip_ink | `#F2E4D0` |
| amber_soft | `#F6B16A` |
| on_accent | `#231012` |

### Typography

- **Heading Font**: Fraunces
- **Body Font**: Inter Tight
- **Mono Font**: Space Mono
- **Base Size**: 17px
- **Scale Ratio**: 1.25
- **Line Height**: 1.55
- **Letter Spacing**: -0.005em
- **Heading Weight**: 700
- **Heading Transform**: none
- **Google Fonts Url**: https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,500;0,9..144,600;0,9..144,700;1,9..144,500;1,9..144,600&family=Inter+Tight:wght@400;500;600;700&family=Space+Mono:wght@400;700&display=swap

### Spacing

- **Base**: 8px
- **Scale**: [4,8,12,16,24,32,48,64]

### Radii

- **None**: 0
- **Sm**: 0
- **Md**: 0
- **Lg**: 0
- **Full**: 9999px

### Shadows

- **Sm**: 0 1px 0 rgba(122,27,34,.06), 0 8px 20px rgba(35,16,18,.07)
- **Md**: 0 1px 0 rgba(122,27,34,.07), 0 14px 36px rgba(35,16,18,.10)
- **Lg**: 0 1px 0 rgba(122,27,34,.10), 0 24px 60px rgba(35,16,18,.14)

### Surfaces

- **Treatment**: scanline
- **Card Style**: Lit film cells on a warm bone ground, mounted on a dark sprocket-perforated leader band; an oxblood corner registration tick replaces any border; glow and scanlines stay faint overlays, never glassy.
- **Bg Pattern**: instrument-grid

### Borders

- **Default Width**: 1px
- **Accent Width**: 2px
- **Style**: solid
- **Character**: No boxed borders: structure comes from the dark film-leader band, hairline rules, generous space, and oxblood corner registration ticks; never a heavy or single-accent card edge.

### Motion

- **Duration**: 240ms
- **Easing**: cubic-bezier(0.2,0.8,0.2,1)
- **Philosophy**: deliberate; the settled state is the no-JS default, reveals layered on top via a .js-gated start-state, fully disabled under prefers-reduced-motion

## Rules

### Composition

Build pages as a film reel: a dominant captioned strip of cells sequenced left to right on a sprocket-perforated leader, framed by perforation rails at the margins, with a literary serif lede setting the scene above.

### Hierarchy

Lead with an optical Fraunces serif headline, descend into Inter Tight summaries, Space Mono cues and tabular figures, and caption-scale annotations so information feels authored and sequenced rather than dumped.

### Density

High density controlled by the reel: every cluster of figures is a captioned cell with whitespace and mono labels, advanced on one shared sprocket that preserves reading order.

### Signature

Data rides a horizontal sprocket-perforated film strip of registration-ticked cells; charts sit over an instrument-grid and scanline scaffold with an amber playhead; controls reveal through ink fill and a measured amber ring, never soft fills.

## Layout

### Grid

A 12-column desktop grid with a dominant horizontal reel and asymmetric supporting spans; a two-column tablet reduction; a single-column mobile stack that keeps the leader band and corner ticks wherever possible.

### Whitespace

Deliberate and editorial: generous outer margins, compact internal cell padding, and larger inter-section gaps that pace the page like reels.

### Density

dense

### Responsive

Renders from ~390px mobile to 2560px+ ultra-wide; mobile stacks to one column, hides non-essential nav links and table columns, and drops the side perforation rails; the full-bleed hero spans 100vw while contained content caps and centres.

### Breakpoints

- **Mobile**: 390px
- **Tablet**: 768px
- **Desktop**: 1440px
- **Ultrawide**: 1700px

## Guidance

### Do

- Pair the serif narration with the mono cue track so figures never lose context.
- Mount data as captioned cells on the reel; caption where it happens.
- Keep the amber a single projector-beam signal; let the dark leader and space do the separating.

### Don't

- Do not drift to a dark control-room ground; the daylight bone is the identity.
- Do not box cells in borders or stack identical tiles; the reel sequences them.
- Do not use neon or more than the three accents, or round the square frames.

### Accessibility

Body 17px+, table rows 14.5px+; ink on bone and strip-ink on leader both clear AA. The hero overlay uses a directional ink veil, not a lazy scrim, to keep the headline legible. Status uses labelled chips (colour AND text). Motion respects prefers-reduced-motion; the settled page renders with no JavaScript.

## Imagery Direction

### Pairs With

scanline-bureau

### Summary

Instrumented telemetry captures rendered on a warm bone-parchment daylight ground rather than dark — projection-booth subjects (projectors, reels, the gate) dressed with a faint instrument grid, scanline texture, and a single electric amber halation as the projector beam.

### Subjects

- film projector and mounted reel
- the gate and sprocket mechanism
- a contact sheet / light table of frames
- a projection beam in a daylit booth

### Usage

One full-bleed landing hero composed wide with the projector body left-of-centre and the amber beam exiting the right edge, leaving a darker left zone for the overlay headline; keep the subject full-frame so the instrument grid reads as an overlay, not surrounding apparatus.

---
version: "alpha"
name: "Sprocket"
description: "Agent-curated design language exported from Katagami as DESIGN.md."
colors:
  primary: "#7A1B22"
  secondary: "#E8761A"
  accent: "#E8761A"
  background: "#F4EFE6"
  surface: "#FBF8F2"
  text: "#1A1410"
  muted: "#6E5F52"
  border: "#D8CDBC"
  error: "#B23A2E"
  success: "#2F7D52"
  warning: "#B5781A"
  info: "#345C8A"
  strip: "#231012"
  strip_ink: "#F2E4D0"
  amber_soft: "#F6B16A"
  on_accent: "#231012"
typography:
  headline-lg:
    fontFamily: "Fraunces"
    fontSize: "2.075rem"
    fontWeight: 700
    lineHeight: 1.1
    letterSpacing: "-0.005em"
  headline-md:
    fontFamily: "Fraunces"
    fontSize: "1.66rem"
    fontWeight: 600
    lineHeight: 1.15
    letterSpacing: "-0.005em"
  body-md:
    fontFamily: "Inter Tight"
    fontSize: "17px"
    fontWeight: 400
    lineHeight: 1.55
    letterSpacing: "-0.005em"
  label-md:
    fontFamily: "Space Mono"
    fontSize: "0.75rem"
    fontWeight: 600
    lineHeight: 1
    letterSpacing: "0.08em"
rounded:
  none: "0px"
  sm: "0px"
  md: "0px"
  lg: "0px"
  full: "9999px"
spacing:
  base: "8px"
  xs: "4px"
  sm: "8px"
  md: "12px"
  lg: "16px"
  xl: "24px"
  2xl: "32px"
  3xl: "48px"
  4xl: "64px"
components:
  color-reference-primary:
    backgroundColor: "{colors.primary}"
  color-reference-secondary:
    backgroundColor: "{colors.secondary}"
  color-reference-accent:
    backgroundColor: "{colors.accent}"
  color-reference-background:
    backgroundColor: "{colors.background}"
  color-reference-surface:
    backgroundColor: "{colors.surface}"
  color-reference-text:
    backgroundColor: "{colors.text}"
  color-reference-muted:
    backgroundColor: "{colors.muted}"
  color-reference-border:
    backgroundColor: "{colors.border}"
  color-reference-error:
    backgroundColor: "{colors.error}"
  color-reference-success:
    backgroundColor: "{colors.success}"
  color-reference-warning:
    backgroundColor: "{colors.warning}"
  color-reference-info:
    backgroundColor: "{colors.info}"
  color-reference-strip:
    backgroundColor: "{colors.strip}"
  color-reference-strip_ink:
    backgroundColor: "{colors.strip_ink}"
  color-reference-amber_soft:
    backgroundColor: "{colors.amber_soft}"
  color-reference-on_accent:
    backgroundColor: "{colors.on_accent}"
  button-primary:
    backgroundColor: "{colors.primary}"
    textColor: "#ffffff"
    typography: "{typography.label-md}"
    rounded: "{rounded.md}"
    padding: "{spacing.md}"
  card-surface:
    backgroundColor: "{colors.surface}"
    textColor: "{colors.text}"
    rounded: "{rounded.md}"
    padding: "{spacing.md}"
  input-default:
    backgroundColor: "{colors.surface}"
    textColor: "{colors.text}"
    rounded: "{rounded.md}"
    height: "44px"
---

# Sprocket

## Overview

Sprocket threads live operations through a film projector: every metric is a frame on a sprocket-perforated strip, captioned where it sits and advanced on one shared mechanism, so an operator reads a control room like a screening rather than a scoreboard. A warm bone-parchment daylight ground (a printed cinema programme, not a dark room), deep oxblood ink, and one electric amber that reads like the projector beam.

### Values

- editorial pacing before decorative futurism
- data sequenced on one reel and captioned in place, not stacked as identical tiles
- warm daylight atmosphere with accessibility-aware contrast
- cinematic worldbuilding through measured typographic restraint, not neon

### Anti-Values

- arcade neon overload without information structure
- generic dashboard cards with a palette pasted on top
- dark control-room cliche; the daylight bone ground is the identity
- skeuomorphic cockpit clutter that defeats reading flow

### Visual Character

- A warm bone-parchment field carries a dark sprocket-perforated film-leader band as its spine; metrics ride that reel as captioned cells, sequenced left to right like film rather than floating as isolated cards.
- Perforation rails run down the left and right margins, framing the page as film stock; the landing hero is a full-bleed projector with an amber halation beam and the same film edges.
- Every focal cell carries an oxblood corner crosshair registration tick instead of a boxed border, reading as a frame mounted on a light table.
- An optical Fraunces serif narrates, a tight Inter Tight grotesk runs operations, and a tabular Space Mono types the cues, timestamps, and indexes — three voices on one strip.
- Charts and timelines sit over a faint instrument-grid and scanline scaffold with an amber playhead and crosshair registration, so data reads instrumented without sci-fi chrome.
- Controls reveal through ink fill, hairline brightening, and a single measured amber ring; the amber is one signal, used like the projector beam, never a flood.

## Colors

Use the YAML color tokens as the normative palette. The prose below names the roles agents should preserve when generating UI.

| Token | Value |
|-------|-------|
| primary | `#7A1B22` |
| secondary | `#E8761A` |
| accent | `#E8761A` |
| background | `#F4EFE6` |
| surface | `#FBF8F2` |
| text | `#1A1410` |
| muted | `#6E5F52` |
| border | `#D8CDBC` |
| error | `#B23A2E` |
| success | `#2F7D52` |
| warning | `#B5781A` |
| info | `#345C8A` |
| strip | `#231012` |
| strip_ink | `#F2E4D0` |
| amber_soft | `#F6B16A` |
| on_accent | `#231012` |

## Typography

- **Headline-Lg**: Fraunces, 2.075rem, weight 700, line-height 1.1.
- **Headline-Md**: Fraunces, 1.66rem, weight 600, line-height 1.15.
- **Body-Md**: Inter Tight, 17px, weight 400, line-height 1.55.
- **Label-Md**: Space Mono, 0.75rem, weight 600, line-height 1.

## Layout

### Spacing Tokens

- **Base**: `8px`
- **Xs**: `4px`
- **Sm**: `8px`
- **Md**: `12px`
- **Lg**: `16px`
- **Xl**: `24px`
- **2xl**: `32px`
- **3xl**: `48px`
- **4xl**: `64px`

### Grid

A 12-column desktop grid with a dominant horizontal reel and asymmetric supporting spans; a two-column tablet reduction; a single-column mobile stack that keeps the leader band and corner ticks wherever possible.

### Whitespace

Deliberate and editorial: generous outer margins, compact internal cell padding, and larger inter-section gaps that pace the page like reels.

### Density

dense

### Responsive

Renders from ~390px mobile to 2560px+ ultra-wide; mobile stacks to one column, hides non-essential nav links and table columns, and drops the side perforation rails; the full-bleed hero spans 100vw while contained content caps and centres.

### Breakpoints

- **Mobile**: 390px
- **Tablet**: 768px
- **Desktop**: 1440px
- **Ultrawide**: 1700px

## Elevation & Depth

### Shadows

- **Sm**: 0 1px 0 rgba(122,27,34,.06), 0 8px 20px rgba(35,16,18,.07)
- **Md**: 0 1px 0 rgba(122,27,34,.07), 0 14px 36px rgba(35,16,18,.10)
- **Lg**: 0 1px 0 rgba(122,27,34,.10), 0 24px 60px rgba(35,16,18,.14)

## Shapes

### Rounded

- **None**: `0px`
- **Sm**: `0px`
- **Md**: `0px`
- **Lg**: `0px`
- **Full**: `9999px`

### Surfaces

- **Treatment**: scanline
- **Card Style**: Lit film cells on a warm bone ground, mounted on a dark sprocket-perforated leader band; an oxblood corner registration tick replaces any border; glow and scanlines stay faint overlays, never glassy.
- **Bg Pattern**: instrument-grid

### Borders

- **Default Width**: 1px
- **Accent Width**: 2px
- **Style**: solid
- **Character**: No boxed borders: structure comes from the dark film-leader band, hairline rules, generous space, and oxblood corner registration ticks; never a heavy or single-accent card edge.

## Components

### Composition

Build pages as a film reel: a dominant captioned strip of cells sequenced left to right on a sprocket-perforated leader, framed by perforation rails at the margins, with a literary serif lede setting the scene above.

### Hierarchy

Lead with an optical Fraunces serif headline, descend into Inter Tight summaries, Space Mono cues and tabular figures, and caption-scale annotations so information feels authored and sequenced rather than dumped.

### Density

High density controlled by the reel: every cluster of figures is a captioned cell with whitespace and mono labels, advanced on one shared sprocket that preserves reading order.

### Signature

Data rides a horizontal sprocket-perforated film strip of registration-ticked cells; charts sit over an instrument-grid and scanline scaffold with an amber playhead; controls reveal through ink fill and a measured amber ring, never soft fills.

## shadcn/ui Usage

When the target app uses shadcn/ui, copy DESIGN.md with shadcn instead of the plain DESIGN.md. It contains the same Katagami design-language source plus the shadcn/ui primitives, imports, theme variables, component recipes, and preview-shot guidance.

DESIGN.md with shadcn: `/language/en-019ef8a5-edcc-7773-9eb9-8c37c3c64da0/DESIGN.with-shadcn.md`.

The shadcn page also exposes optional machine-readable files for automation, but the human-facing handoff is DESIGN.md with shadcn.

Install recommended primitives with `npx shadcn@latest add button card input textarea select dialog sheet tabs badge separator checkbox switch slider tooltip dropdown-menu table`.

Use these primitives in shadcn apps:
- button
- card
- input
- textarea
- select
- dialog
- sheet
- tabs
- badge
- separator
- checkbox
- switch
- slider
- tooltip
- dropdown-menu
- table

Implementation rule for agents: import shadcn primitives from `@/components/ui/*`, apply the generated CSS variables first, then compose the language-specific recipes from the companion MD. Katagami remains the source of truth; shadcn names are the implementation surface.

## Do's and Don'ts

- Do Pair the serif narration with the mono cue track so figures never lose context.
- Do Mount data as captioned cells on the reel; caption where it happens.
- Do Keep the amber a single projector-beam signal; let the dark leader and space do the separating.
- Don't Do not drift to a dark control-room ground; the daylight bone is the identity.
- Don't Do not box cells in borders or stack identical tiles; the reel sequences them.
- Don't Do not use neon or more than the three accents, or round the square frames.

### Accessibility

Body 17px+, table rows 14.5px+; ink on bone and strip-ink on leader both clear AA. The hero overlay uses a directional ink veil, not a lazy scrim, to keep the headline legible. Status uses labelled chips (colour AND text). Motion respects prefers-reduced-motion; the settled page renders with no JavaScript.

## Imagery Direction

### Pairs With

scanline-bureau

### Summary

Instrumented telemetry captures rendered on a warm bone-parchment daylight ground rather than dark — projection-booth subjects (projectors, reels, the gate) dressed with a faint instrument grid, scanline texture, and a single electric amber halation as the projector beam.

### Subjects

- film projector and mounted reel
- the gate and sprocket mechanism
- a contact sheet / light table of frames
- a projection beam in a daylit booth

### Usage

One full-bleed landing hero composed wide with the projector body left-of-centre and the amber beam exiting the right edge, leaving a darker left zone for the overlay headline; keep the subject full-frame so the instrument grid reads as an overlay, not surrounding apparatus.

```json
{
  "$schema": "https://ui.shadcn.com/schema/registry-item.json",
  "name": "sprocket",
  "type": "registry:theme",
  "title": "Sprocket shadcn Theme",
  "cssVars": {
    "theme": {},
    "light": {
      "background": "#F4EFE6",
      "foreground": "#1A1410",
      "card": "#FBF8F2",
      "card-foreground": "#1A1410",
      "popover": "#FBF8F2",
      "popover-foreground": "#1A1410",
      "primary": "#7A1B22",
      "primary-foreground": "#ffffff",
      "secondary": "#E8761A",
      "secondary-foreground": "#ffffff",
      "muted": "#6E5F52",
      "muted-foreground": "#1A1410",
      "accent": "#E8761A",
      "accent-foreground": "#ffffff",
      "destructive": "#B23A2E",
      "border": "#D8CDBC",
      "input": "#D8CDBC",
      "ring": "#E8761A",
      "chart-1": "#7A1B22",
      "chart-2": "#E8761A",
      "chart-3": "#E8761A",
      "chart-4": "#2F7D52",
      "chart-5": "#B5781A",
      "sidebar": "#FBF8F2",
      "sidebar-foreground": "#1A1410",
      "sidebar-primary": "#7A1B22",
      "sidebar-primary-foreground": "#ffffff",
      "sidebar-accent": "#345C8A",
      "sidebar-accent-foreground": "#ffffff",
      "sidebar-border": "#D8CDBC",
      "sidebar-ring": "#E8761A",
      "radius": "0"
    },
    "dark": {
      "background": "#0f1115",
      "foreground": "#f8fafc",
      "card": "#181b22",
      "card-foreground": "#f8fafc",
      "popover": "#181b22",
      "popover-foreground": "#f8fafc",
      "primary": "#7A1B22",
      "primary-foreground": "#ffffff",
      "secondary": "#252a33",
      "secondary-foreground": "#f8fafc",
      "muted": "#252a33",
      "muted-foreground": "#a1a1aa",
      "accent": "#E8761A",
      "accent-foreground": "#ffffff",
      "destructive": "#B23A2E",
      "border": "#303642",
      "input": "#303642",
      "ring": "#E8761A",
      "chart-1": "#7A1B22",
      "chart-2": "#E8761A",
      "chart-3": "#E8761A",
      "chart-4": "#2F7D52",
      "chart-5": "#B5781A",
      "sidebar": "#181b22",
      "sidebar-foreground": "#f8fafc",
      "sidebar-primary": "#7A1B22",
      "sidebar-primary-foreground": "#ffffff",
      "sidebar-accent": "#E8761A",
      "sidebar-accent-foreground": "#ffffff",
      "sidebar-border": "#303642",
      "sidebar-ring": "#E8761A",
      "radius": "0"
    }
  },
  "meta": {
    "source": "katagami",
    "languageId": "en-019ef8a5-edcc-7773-9eb9-8c37c3c64da0",
    "slug": "sprocket",
    "componentManifest": [
      "button",
      "card",
      "input",
      "textarea",
      "select",
      "dialog",
      "sheet",
      "tabs",
      "badge",
      "separator",
      "checkbox",
      "switch",
      "slider",
      "tooltip",
      "dropdown-menu",
      "table"
    ],
    "installCommand": "npx shadcn@latest add button card input textarea select dialog sheet tabs badge separator checkbox switch slider tooltip dropdown-menu table",
    "nativeTokenNames": {
      "colors": [
        "accent",
        "amber_soft",
        "background",
        "border",
        "error",
        "info",
        "muted",
        "on_accent",
        "primary",
        "secondary",
        "strip",
        "strip_ink",
        "success",
        "surface",
        "text",
        "warning"
      ],
      "typography": [
        "base_size",
        "body_font",
        "google_fonts_url",
        "heading_font",
        "heading_transform",
        "heading_weight",
        "letter_spacing",
        "line_height",
        "mono_font",
        "scale_ratio"
      ],
      "spacing": [
        "base",
        "scale"
      ],
      "radii": [
        "full",
        "lg",
        "md",
        "none",
        "sm"
      ],
      "shadows": [
        "lg",
        "md",
        "sm"
      ],
      "surfaces": [
        "bg_pattern",
        "card_style",
        "treatment"
      ],
      "borders": [
        "accent_width",
        "character",
        "default_width",
        "style"
      ],
      "motion": [
        "duration",
        "easing",
        "philosophy"
      ]
    }
  }
}
```