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Acetate

A portable design language for agents: download the markdown first, then inspect the preview, tokens, and rules as needed.

Download DESIGN.md

Portable DESIGN.md — tokens plus the paired art style. Agents must generate real images.

the spec

specification

philosophy
summary
Acetate is the interface language of an optical archive recovery bench. Damaged records are read on a lit glass platen, and every piece of state is shown as a pale blue overlay sheet sitting a few pixels out of register with the ink frame beneath it — until the record is confirmed, and the sheet slides home. It treats damaged memory as evidence rather than spectacle, and it leaves the holes visible.
values
Preserve uncertainty: missing frames, drift and occlusion stay visible instead of being cosmetically filled in.State is expressed as an offset rather than a colour: the distance between two exposures says what a status hue would otherwise have to.Restraint is care: frosted white, vellum grey, ink black and one archival blue carry the whole identity.Structure narrates: contact sheets, accession rails, gutters and crop marks explain recovery state without a dashboard idiom.Forensic legibility over drama — readable checksum strings, timestamp rails and chain-of-custody prose.Manga influence is page architecture: asymmetric panels, gutters and ink frames, never illustration.
anti-values
×No green code rain, neon cyberpunk cyan or magenta, red-alert theatre, skulls or terminal spam.×No SaaS analytics card grids, equal three-across feature cards, or sections labelled Data and Controls.×No anime portraits, mascots or decorative kanji; this is archival interface design.×No glossy maximal glassmorphism — translucency must read as scan-bed acetate, never as a widget.×No soft drop shadows, glows or gradients anywhere; the offset duplicate is the only elevation.×No rounded corners in a language whose geometry has no curves.
visual character
Asymmetric ink panel frames at 1px with 2px corner registration ticks and unequal spans replace conventional cards entirely.Frosted vellum surfaces built from translucent white and an 8px backdrop blur, with faint pressure-mark noise instead of gradients.A pale archival-blue duplicate, hard-offset 4-8px with zero blur, sits behind every stateful element and slides to zero on confirmation.Contact-sheet cells carry partial occlusion, blue drift offsets, and deliberately empty hatched frames for unrecoverable material.Vertical rails of rotated condensed microtype, ruler ticks and full-strength ink axes give every screen its forensic orientation.
lineage
A faithful modernization of Quiet Optical Accession, which drew its structure from manga page architecture, its surfaces from photographic conservation practice, and its microtype from mid-century laboratory instrumentation.
tokens
colors14 items
bg
#F7F6F1
surface
#FDFDFB
surface_solid
#FFFFFF
text
#111316
muted
#565E67
border
#111316
accent
#6E9EC8
accent_2
#1D2F44
accent_soft
#DFE9F3
on_accent
#0C1620
success
#3D6255
warning
#6F5B2E
error
#7A4139
info
#1D2F44
typography10 items
base size
17px
body font
Gelasio
heading font
Oswald
mono font
Cutive Mono
heading weight
500
heading transform
uppercase
letter spacing
-0.035em display, -0.01em body
line height
1.55
scale ratio
1.25
google fonts url
https://fonts.googleapis.com/css2?family=Cutive+Mono&family=Gelasio:ital,wght@0,400;0,500;1,400&family=Oswald:wght@300;400;500&display=swap
radii4 items
none
0px
md
16px
lg
24px
full
9999px
shadows3 items
sm
0 1px 0 rgba(17,19,22,0.12)
md
4px 4px 0 rgba(110,158,200,0.22)
lg
8px 8px 0 rgba(110,158,200,0.18)
spacing2 items
base
8px
scale
4, 8, 12, 16, 24, 32, 48, 64, 96
surfaces3 items
treatment
Frosted vellum: #FDFDFB at 82-92% over the paper ground with backdrop-filter blur(8px) and faint pressure-mark noise. No gradients.
card style
Platen panel — square 1px ink hairline at 20%, two 18px full-ink corner registration ticks, an accession tab notched into the top edge, vellum fill. Never nested, never edge-accented.
bg pattern
Registration field: 1px ruler ticks at 72px, thin ink axes and one pale acetate drift band, dropping to near-zero opacity wherever copy sits.
borders4 items
default width
1px
accent width
2px
style
solid
character
Ink hairlines at 16-22% alpha for ordinary boundaries, full ink for structural axes and 2px corner registration ticks, and a 2px archival-blue mark only on registered frames.
motion3 items
duration
900ms
easing
cubic-bezier(0.45, 0, 0.15, 1)
philosophy
One slow optical pass. Everything moves at the speed of a scanner head — things drift, register and fog; nothing pops, bounces or pulses. Every motion is reversible because every operation on this bench is reversible.
rules
composition
Build screens as forensic light tables: one dominant recovery plate, a narrow metadata rail, a contact-sheet strip, and large negative-space margins. Use unequal panel spans (7/3/2), visible gutters and ruler ticks, and one deliberate grid break per screen where a loupe or scan band crosses a panel boundary. Do not centre everything; alignment should read as evidence being registered on glass.
hierarchy
Hierarchy comes from scale, frame weight, orientation and acetate overlay rather than colour variety. Oswald condensed uppercase labels accession zones; Gelasio at 17px carries every explanatory note; Cutive Mono carries checksums, timestamps and tolerances. Registered items take the acetate wash and a blue calibration mark; uncertain items stay pale and offset; unrecoverable items take the hatch.
density
Alternate hard: 4-8px inside micro-metadata clusters against 48-96px between evidence groups. Never a uniform 24px rhythm — that is what makes a forensic page read like a settings screen.
signature patterns
Register slip — a hard 4-8px archival-blue duplicate of an element's own frame, offset with zero blur, walking to zero as state is confirmed and absent entirely for unrecoverable material.Optical pass — a slow translucent band crossing a plate and briefly fogging the glass behind it; on the landing it is the scanner head that drives the whole film.Accession rail — rotated timestamps, ruler-tick gradients and a thin ink axis that continues across panel boundaries as page furniture, never as a card accent.Blank frame — the unrecoverable cell: hatched, empty, numbered, and never filled in with a placeholder.Checksum stamp — a square mono capsule with a bracketed prompt and a single 8px blue calibration square.
layout
grid
Desktop is a 12-column forensic table with 16px gutters, 1320-1560px maximum, and a 76px accession rail down the left carrying rotated timestamps and ruler ticks. Column spans are deliberately unequal — 7/3/2 — so one plate always dominates.
breakpoints
wide >= 1800, desktop 1281-1799, small laptop 1025-1280, tablet 641-1024, mobile <= 640. The dominant plate is preserved first, then the contact sheet, then the metadata rail.
whitespace

Margins should read as paper left untouched: 48-96px around evidence groups, 4-12px inside micro clusters, never a uniform 24px everywhere.

responsive
Tablet is its own composition rather than a stretched column: 8 columns with the rail retained at 56px, the contact sheet moved below the plate and widened, metadata folded two-up. Mobile is a single column; the rail rotates into a 44-46px horizontal ruler strip across the top; contact cells reduce in count rather than shrinking below legibility; the loupe stays visible.
density

High contrast of density — tight metadata and checksum rows beside generous blank vellum margins, so recovery feels deliberate rather than crowded.

guidance
do
  • Keep the chromatic vocabulary to frosted white, vellum grey, ink black and one archival blue.
  • Use the register slip for state; let the offset itself say what a colour would otherwise have to.
  • Leave unrecoverable material visibly blank and hatched, with its number still attached.
  • Set headings in condensed uppercase, notes in the serif at 17px, and machine values in mono at 11-13px.
  • Let one panel dominate every screen, and let a scan band or rail axis cross a gutter once per screen as the deliberate break.
  • Frame every module as a real bench task: intake, optical pass, checksum comparison, fragment sheet, custody.
avoid
  • Do not put the archival blue on small type — it is a surface hue; #1D2F44 is its ink.
  • Do not round anything; a rounded card in this language is wrong even though 16 is an allowed token.
  • Do not use soft shadows, glows or gradients; the slip is the only elevation.
  • Do not run pattern under copy, and do not set body text over a plate.
  • Do not place three equal panels in a row, and do not label a region Data or Controls.
  • Do not dramatise damage with glitch effects, red alerts or terminal spam; damage is stated rather than performed.
imagery
pairs with

ozalid

illustration style
Duotone diazo contact prints pulled from a scanned original: near-black continuous tone plus a pale archival-blue second exposure a few millimetres out of register, on translucent vellum, with soft edge halation, fine paper grain and scattered dust.
hero image direction
One full-bleed plate photographed straight down onto a lit light table, composed so that a third to a half of the frame is plain empty tabletop reserved for display type. Cool neutral only — no warm or sepia cast, no burnt frame borders.
subjects
Evidence abstractions: plates and overlay sheets on lit glass, contact sheets with blank frames, damaged emulsion, stacked glassine. Never character art, mascots or decorative kanji.
icon style

Drawn 1-1.2px strokes on a square grid — chevrons, arrows and crosses built from two straight lines. No filled pictograms, no rounded joins, no emoji.

image gen prompts
A cracked glass photographic plate on a lit light table, seen straight down, with the whole upper-left third plain empty tabletop — duotone diazo contact print, near-black ink and pale archival blue out of register on translucent vellum, soft halation, paper grain, dust. NO text, NO letters, NO logos.A contact sheet of thirty small frames, a dozen of them completely blank — duotone diazo contact print, near-black ink and pale archival blue out of register on translucent vellum, soft halation, paper grain. NO text, NO letters, NO logos.
swap contract
Every raster plate in the landing is consumed through a --plate-N variable with the URL as the inline default at every use site, documented in a <!-- plate-manifest --> comment; the WebGL ground reads its texture URL from --plate-2a, so an art-style swap re-skins the shader too.
katagami spec
# Acetate

## Philosophy

Acetate is the interface language of an optical archive recovery bench. Damaged records are read on a lit glass platen, and every piece of state is shown as a pale blue overlay sheet sitting a few pixels out of register with the ink frame beneath it — until the record is confirmed, and the sheet slides home. It treats damaged memory as evidence rather than spectacle, and it leaves the holes visible.

### Values

- Preserve uncertainty: missing frames, drift and occlusion stay visible instead of being cosmetically filled in.
- State is expressed as an offset rather than a colour: the distance between two exposures says what a status hue would otherwise have to.
- Restraint is care: frosted white, vellum grey, ink black and one archival blue carry the whole identity.
- Structure narrates: contact sheets, accession rails, gutters and crop marks explain recovery state without a dashboard idiom.
- Forensic legibility over drama — readable checksum strings, timestamp rails and chain-of-custody prose.
- Manga influence is page architecture: asymmetric panels, gutters and ink frames, never illustration.

### Anti-Values

- No green code rain, neon cyberpunk cyan or magenta, red-alert theatre, skulls or terminal spam.
- No SaaS analytics card grids, equal three-across feature cards, or sections labelled Data and Controls.
- No anime portraits, mascots or decorative kanji; this is archival interface design.
- No glossy maximal glassmorphism — translucency must read as scan-bed acetate, never as a widget.
- No soft drop shadows, glows or gradients anywhere; the offset duplicate is the only elevation.
- No rounded corners in a language whose geometry has no curves.

### Visual Character

- Asymmetric ink panel frames at 1px with 2px corner registration ticks and unequal spans replace conventional cards entirely.
- Frosted vellum surfaces built from translucent white and an 8px backdrop blur, with faint pressure-mark noise instead of gradients.
- A pale archival-blue duplicate, hard-offset 4-8px with zero blur, sits behind every stateful element and slides to zero on confirmation.
- Contact-sheet cells carry partial occlusion, blue drift offsets, and deliberately empty hatched frames for unrecoverable material.
- Vertical rails of rotated condensed microtype, ruler ticks and full-strength ink axes give every screen its forensic orientation.

### Lineage

> A faithful modernization of Quiet Optical Accession, which drew its structure from manga page architecture, its surfaces from photographic conservation practice, and its microtype from mid-century laboratory instrumentation.

## Tokens

### Colors

| Name | Value |
|------|-------|
| bg | `#F7F6F1` |
| surface | `#FDFDFB` |
| surface_solid | `#FFFFFF` |
| text | `#111316` |
| muted | `#565E67` |
| border | `#111316` |
| accent | `#6E9EC8` |
| accent_2 | `#1D2F44` |
| accent_soft | `#DFE9F3` |
| on_accent | `#0C1620` |
| success | `#3D6255` |
| warning | `#6F5B2E` |
| error | `#7A4139` |
| info | `#1D2F44` |

### Typography

- **Base Size**: 17px
- **Body Font**: Gelasio
- **Heading Font**: Oswald
- **Mono Font**: Cutive Mono
- **Heading Weight**: 500
- **Heading Transform**: uppercase
- **Letter Spacing**: -0.035em display, -0.01em body
- **Line Height**: 1.55
- **Scale Ratio**: 1.25
- **Google Fonts Url**: https://fonts.googleapis.com/css2?family=Cutive+Mono&family=Gelasio:ital,wght@0,400;0,500;1,400&family=Oswald:wght@300;400;500&display=swap

### Radii

- **None**: 0px
- **Md**: 16px
- **Lg**: 24px
- **Full**: 9999px

### Shadows

- **Sm**: 0 1px 0 rgba(17,19,22,0.12)
- **Md**: 4px 4px 0 rgba(110,158,200,0.22)
- **Lg**: 8px 8px 0 rgba(110,158,200,0.18)

### Spacing

- **Base**: 8px
- **Scale**: [4,8,12,16,24,32,48,64,96]

### Surfaces

- **Treatment**: Frosted vellum: #FDFDFB at 82-92% over the paper ground with backdrop-filter blur(8px) and faint pressure-mark noise. No gradients.
- **Card Style**: Platen panel — square 1px ink hairline at 20%, two 18px full-ink corner registration ticks, an accession tab notched into the top edge, vellum fill. Never nested, never edge-accented.
- **Bg Pattern**: Registration field: 1px ruler ticks at 72px, thin ink axes and one pale acetate drift band, dropping to near-zero opacity wherever copy sits.

### Borders

- **Default Width**: 1px
- **Accent Width**: 2px
- **Style**: solid
- **Character**: Ink hairlines at 16-22% alpha for ordinary boundaries, full ink for structural axes and 2px corner registration ticks, and a 2px archival-blue mark only on registered frames.

### Motion

- **Duration**: 900ms
- **Easing**: cubic-bezier(0.45, 0, 0.15, 1)
- **Philosophy**: One slow optical pass. Everything moves at the speed of a scanner head — things drift, register and fog; nothing pops, bounces or pulses. Every motion is reversible because every operation on this bench is reversible.

## Rules

### Composition

Build screens as forensic light tables: one dominant recovery plate, a narrow metadata rail, a contact-sheet strip, and large negative-space margins. Use unequal panel spans (7/3/2), visible gutters and ruler ticks, and one deliberate grid break per screen where a loupe or scan band crosses a panel boundary. Do not centre everything; alignment should read as evidence being registered on glass.

### Hierarchy

Hierarchy comes from scale, frame weight, orientation and acetate overlay rather than colour variety. Oswald condensed uppercase labels accession zones; Gelasio at 17px carries every explanatory note; Cutive Mono carries checksums, timestamps and tolerances. Registered items take the acetate wash and a blue calibration mark; uncertain items stay pale and offset; unrecoverable items take the hatch.

### Density

Alternate hard: 4-8px inside micro-metadata clusters against 48-96px between evidence groups. Never a uniform 24px rhythm — that is what makes a forensic page read like a settings screen.

### Signature Patterns

- Register slip — a hard 4-8px archival-blue duplicate of an element's own frame, offset with zero blur, walking to zero as state is confirmed and absent entirely for unrecoverable material.
- Optical pass — a slow translucent band crossing a plate and briefly fogging the glass behind it; on the landing it is the scanner head that drives the whole film.
- Accession rail — rotated timestamps, ruler-tick gradients and a thin ink axis that continues across panel boundaries as page furniture, never as a card accent.
- Blank frame — the unrecoverable cell: hatched, empty, numbered, and never filled in with a placeholder.
- Checksum stamp — a square mono capsule with a bracketed prompt and a single 8px blue calibration square.

## Layout

### Grid

Desktop is a 12-column forensic table with 16px gutters, 1320-1560px maximum, and a 76px accession rail down the left carrying rotated timestamps and ruler ticks. Column spans are deliberately unequal — 7/3/2 — so one plate always dominates.

### Breakpoints

wide >= 1800, desktop 1281-1799, small laptop 1025-1280, tablet 641-1024, mobile <= 640. The dominant plate is preserved first, then the contact sheet, then the metadata rail.

### Whitespace

Margins should read as paper left untouched: 48-96px around evidence groups, 4-12px inside micro clusters, never a uniform 24px everywhere.

### Responsive

Tablet is its own composition rather than a stretched column: 8 columns with the rail retained at 56px, the contact sheet moved below the plate and widened, metadata folded two-up. Mobile is a single column; the rail rotates into a 44-46px horizontal ruler strip across the top; contact cells reduce in count rather than shrinking below legibility; the loupe stays visible.

### Density

High contrast of density — tight metadata and checksum rows beside generous blank vellum margins, so recovery feels deliberate rather than crowded.

## Guidance

### Do

- Keep the chromatic vocabulary to frosted white, vellum grey, ink black and one archival blue.
- Use the register slip for state; let the offset itself say what a colour would otherwise have to.
- Leave unrecoverable material visibly blank and hatched, with its number still attached.
- Set headings in condensed uppercase, notes in the serif at 17px, and machine values in mono at 11-13px.
- Let one panel dominate every screen, and let a scan band or rail axis cross a gutter once per screen as the deliberate break.
- Frame every module as a real bench task: intake, optical pass, checksum comparison, fragment sheet, custody.

### Don't

- Do not put the archival blue on small type — it is a surface hue; #1D2F44 is its ink.
- Do not round anything; a rounded card in this language is wrong even though 16 is an allowed token.
- Do not use soft shadows, glows or gradients; the slip is the only elevation.
- Do not run pattern under copy, and do not set body text over a plate.
- Do not place three equal panels in a row, and do not label a region Data or Controls.
- Do not dramatise damage with glitch effects, red alerts or terminal spam; damage is stated rather than performed.

### Accessibility

Maintain AA for all text: body ink #111316 on paper is 16.4:1, muted #565E67 is 4.9:1, and accent-role words use #1D2F44 at 12.5:1. Never rely on the blue alone for state — the register offset, a text label and a semantic square always accompany it. Focus is a 2px #1D2F44 ring on every control; tap targets are 44px minimum; the hatch that marks unrecoverable material is a texture, not a colour, so it survives greyscale and colour-blind rendering.

## Imagery Direction

### Pairs With

ozalid

### Illustration Style

Duotone diazo contact prints pulled from a scanned original: near-black continuous tone plus a pale archival-blue second exposure a few millimetres out of register, on translucent vellum, with soft edge halation, fine paper grain and scattered dust.

### Hero Image Direction

One full-bleed plate photographed straight down onto a lit light table, composed so that a third to a half of the frame is plain empty tabletop reserved for display type. Cool neutral only — no warm or sepia cast, no burnt frame borders.

### Subjects

Evidence abstractions: plates and overlay sheets on lit glass, contact sheets with blank frames, damaged emulsion, stacked glassine. Never character art, mascots or decorative kanji.

### Icon Style

Drawn 1-1.2px strokes on a square grid — chevrons, arrows and crosses built from two straight lines. No filled pictograms, no rounded joins, no emoji.

### Image Gen Prompts

- A cracked glass photographic plate on a lit light table, seen straight down, with the whole upper-left third plain empty tabletop — duotone diazo contact print, near-black ink and pale archival blue out of register on translucent vellum, soft halation, paper grain, dust. NO text, NO letters, NO logos.
- A contact sheet of thirty small frames, a dozen of them completely blank — duotone diazo contact print, near-black ink and pale archival blue out of register on translucent vellum, soft halation, paper grain. NO text, NO letters, NO logos.

### Swap Contract

Every raster plate in the landing is consumed through a --plate-N variable with the URL as the inline default at every use site, documented in a <!-- plate-manifest --> comment; the WebGL ground reads its texture URL from --plate-2a, so an art-style swap re-skins the shader too.
DESIGN.md
---
version: "alpha"
name: "Acetate"
description: "Agent-curated design language exported from Katagami as DESIGN.md."
colors:
  bg: "#F7F6F1"
  surface: "#FDFDFB"
  surface_solid: "#FFFFFF"
  text: "#111316"
  muted: "#565E67"
  border: "#111316"
  accent: "#6E9EC8"
  accent_2: "#1D2F44"
  accent_soft: "#DFE9F3"
  on_accent: "#0C1620"
  success: "#3D6255"
  warning: "#6F5B2E"
  error: "#7A4139"
  info: "#1D2F44"
typography:
  headline-lg:
    fontFamily: "Oswald"
    fontSize: "2.075rem"
    fontWeight: 700
    lineHeight: 1.1
    letterSpacing: "-0.02em"
  headline-md:
    fontFamily: "Oswald"
    fontSize: "1.66rem"
    fontWeight: 600
    lineHeight: 1.15
    letterSpacing: "-0.02em"
  body-md:
    fontFamily: "Gelasio"
    fontSize: "17px"
    fontWeight: 400
    lineHeight: 1.55
    letterSpacing: "-0.02em"
  label-md:
    fontFamily: "Cutive Mono"
    fontSize: "0.75rem"
    fontWeight: 600
    lineHeight: 1
    letterSpacing: "0.08em"
rounded:
  none: "0px"
  md: "16px"
  lg: "24px"
  full: "9999px"
spacing:
  base: "8px"
  xs: "4px"
  sm: "8px"
  md: "12px"
  lg: "16px"
  xl: "24px"
  2xl: "32px"
  3xl: "48px"
  4xl: "64px"
  step-8: "96px"
components:
  color-reference-bg:
    backgroundColor: "{colors.bg}"
  color-reference-surface:
    backgroundColor: "{colors.surface}"
  color-reference-surface_solid:
    backgroundColor: "{colors.surface_solid}"
  color-reference-text:
    backgroundColor: "{colors.text}"
  color-reference-muted:
    backgroundColor: "{colors.muted}"
  color-reference-border:
    backgroundColor: "{colors.border}"
  color-reference-accent:
    backgroundColor: "{colors.accent}"
  color-reference-accent_2:
    backgroundColor: "{colors.accent_2}"
  color-reference-accent_soft:
    backgroundColor: "{colors.accent_soft}"
  color-reference-on_accent:
    backgroundColor: "{colors.on_accent}"
  color-reference-success:
    backgroundColor: "{colors.success}"
  color-reference-warning:
    backgroundColor: "{colors.warning}"
  color-reference-error:
    backgroundColor: "{colors.error}"
  color-reference-info:
    backgroundColor: "{colors.info}"
  button-primary:
    backgroundColor: "{colors.accent}"
    textColor: "#000000"
    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"
---

# Acetate

## Overview

Acetate is the interface language of an optical archive recovery bench. Damaged records are read on a lit glass platen, and every piece of state is shown as a pale blue overlay sheet sitting a few pixels out of register with the ink frame beneath it — until the record is confirmed, and the sheet slides home. It treats damaged memory as evidence rather than spectacle, and it leaves the holes visible.

### Values

- Preserve uncertainty: missing frames, drift and occlusion stay visible instead of being cosmetically filled in.
- State is expressed as an offset rather than a colour: the distance between two exposures says what a status hue would otherwise have to.
- Restraint is care: frosted white, vellum grey, ink black and one archival blue carry the whole identity.
- Structure narrates: contact sheets, accession rails, gutters and crop marks explain recovery state without a dashboard idiom.
- Forensic legibility over drama — readable checksum strings, timestamp rails and chain-of-custody prose.
- Manga influence is page architecture: asymmetric panels, gutters and ink frames, never illustration.

### Anti-Values

- No green code rain, neon cyberpunk cyan or magenta, red-alert theatre, skulls or terminal spam.
- No SaaS analytics card grids, equal three-across feature cards, or sections labelled Data and Controls.
- No anime portraits, mascots or decorative kanji; this is archival interface design.
- No glossy maximal glassmorphism — translucency must read as scan-bed acetate, never as a widget.
- No soft drop shadows, glows or gradients anywhere; the offset duplicate is the only elevation.
- No rounded corners in a language whose geometry has no curves.

### Visual Character

- Asymmetric ink panel frames at 1px with 2px corner registration ticks and unequal spans replace conventional cards entirely.
- Frosted vellum surfaces built from translucent white and an 8px backdrop blur, with faint pressure-mark noise instead of gradients.
- A pale archival-blue duplicate, hard-offset 4-8px with zero blur, sits behind every stateful element and slides to zero on confirmation.
- Contact-sheet cells carry partial occlusion, blue drift offsets, and deliberately empty hatched frames for unrecoverable material.
- Vertical rails of rotated condensed microtype, ruler ticks and full-strength ink axes give every screen its forensic orientation.

### Lineage

> A faithful modernization of Quiet Optical Accession, which drew its structure from manga page architecture, its surfaces from photographic conservation practice, and its microtype from mid-century laboratory instrumentation.

## Colors

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

| Token | Value |
|-------|-------|
| bg | `#F7F6F1` |
| surface | `#FDFDFB` |
| surface_solid | `#FFFFFF` |
| text | `#111316` |
| muted | `#565E67` |
| border | `#111316` |
| accent | `#6E9EC8` |
| accent_2 | `#1D2F44` |
| accent_soft | `#DFE9F3` |
| on_accent | `#0C1620` |
| success | `#3D6255` |
| warning | `#6F5B2E` |
| error | `#7A4139` |
| info | `#1D2F44` |

## Typography

- **Headline-Lg**: Oswald, 2.075rem, weight 700, line-height 1.1.
- **Headline-Md**: Oswald, 1.66rem, weight 600, line-height 1.15.
- **Body-Md**: Gelasio, 17px, weight 400, line-height 1.55.
- **Label-Md**: Cutive 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`
- **Step-8**: `96px`

### Grid

Desktop is a 12-column forensic table with 16px gutters, 1320-1560px maximum, and a 76px accession rail down the left carrying rotated timestamps and ruler ticks. Column spans are deliberately unequal — 7/3/2 — so one plate always dominates.

### Breakpoints

wide >= 1800, desktop 1281-1799, small laptop 1025-1280, tablet 641-1024, mobile <= 640. The dominant plate is preserved first, then the contact sheet, then the metadata rail.

### Whitespace

Margins should read as paper left untouched: 48-96px around evidence groups, 4-12px inside micro clusters, never a uniform 24px everywhere.

### Responsive

Tablet is its own composition rather than a stretched column: 8 columns with the rail retained at 56px, the contact sheet moved below the plate and widened, metadata folded two-up. Mobile is a single column; the rail rotates into a 44-46px horizontal ruler strip across the top; contact cells reduce in count rather than shrinking below legibility; the loupe stays visible.

### Density

High contrast of density — tight metadata and checksum rows beside generous blank vellum margins, so recovery feels deliberate rather than crowded.

## Elevation & Depth

### Shadows

- **Sm**: 0 1px 0 rgba(17,19,22,0.12)
- **Md**: 4px 4px 0 rgba(110,158,200,0.22)
- **Lg**: 8px 8px 0 rgba(110,158,200,0.18)

## Shapes

### Rounded

- **None**: `0px`
- **Md**: `16px`
- **Lg**: `24px`
- **Full**: `9999px`

### Surfaces

- **Treatment**: Frosted vellum: #FDFDFB at 82-92% over the paper ground with backdrop-filter blur(8px) and faint pressure-mark noise. No gradients.
- **Card Style**: Platen panel — square 1px ink hairline at 20%, two 18px full-ink corner registration ticks, an accession tab notched into the top edge, vellum fill. Never nested, never edge-accented.
- **Bg Pattern**: Registration field: 1px ruler ticks at 72px, thin ink axes and one pale acetate drift band, dropping to near-zero opacity wherever copy sits.

### Borders

- **Default Width**: 1px
- **Accent Width**: 2px
- **Style**: solid
- **Character**: Ink hairlines at 16-22% alpha for ordinary boundaries, full ink for structural axes and 2px corner registration ticks, and a 2px archival-blue mark only on registered frames.

## Components

### Composition

Build screens as forensic light tables: one dominant recovery plate, a narrow metadata rail, a contact-sheet strip, and large negative-space margins. Use unequal panel spans (7/3/2), visible gutters and ruler ticks, and one deliberate grid break per screen where a loupe or scan band crosses a panel boundary. Do not centre everything; alignment should read as evidence being registered on glass.

### Hierarchy

Hierarchy comes from scale, frame weight, orientation and acetate overlay rather than colour variety. Oswald condensed uppercase labels accession zones; Gelasio at 17px carries every explanatory note; Cutive Mono carries checksums, timestamps and tolerances. Registered items take the acetate wash and a blue calibration mark; uncertain items stay pale and offset; unrecoverable items take the hatch.

### Density

Alternate hard: 4-8px inside micro-metadata clusters against 48-96px between evidence groups. Never a uniform 24px rhythm — that is what makes a forensic page read like a settings screen.

### Signature Patterns

- Register slip — a hard 4-8px archival-blue duplicate of an element's own frame, offset with zero blur, walking to zero as state is confirmed and absent entirely for unrecoverable material.
- Optical pass — a slow translucent band crossing a plate and briefly fogging the glass behind it; on the landing it is the scanner head that drives the whole film.
- Accession rail — rotated timestamps, ruler-tick gradients and a thin ink axis that continues across panel boundaries as page furniture, never as a card accent.
- Blank frame — the unrecoverable cell: hatched, empty, numbered, and never filled in with a placeholder.
- Checksum stamp — a square mono capsule with a bracketed prompt and a single 8px blue calibration square.

## 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-019ffc42-54d8-7973-9df1-3276335bb669/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 Keep the chromatic vocabulary to frosted white, vellum grey, ink black and one archival blue.
- Do Use the register slip for state; let the offset itself say what a colour would otherwise have to.
- Do Leave unrecoverable material visibly blank and hatched, with its number still attached.
- Do Set headings in condensed uppercase, notes in the serif at 17px, and machine values in mono at 11-13px.
- Do Let one panel dominate every screen, and let a scan band or rail axis cross a gutter once per screen as the deliberate break.
- Do Frame every module as a real bench task: intake, optical pass, checksum comparison, fragment sheet, custody.
- Don't Do not put the archival blue on small type — it is a surface hue; #1D2F44 is its ink.
- Don't Do not round anything; a rounded card in this language is wrong even though 16 is an allowed token.
- Don't Do not use soft shadows, glows or gradients; the slip is the only elevation.
- Don't Do not run pattern under copy, and do not set body text over a plate.
- Don't Do not place three equal panels in a row, and do not label a region Data or Controls.
- Don't Do not dramatise damage with glitch effects, red alerts or terminal spam; damage is stated rather than performed.

### Accessibility

Maintain AA for all text: body ink #111316 on paper is 16.4:1, muted #565E67 is 4.9:1, and accent-role words use #1D2F44 at 12.5:1. Never rely on the blue alone for state — the register offset, a text label and a semantic square always accompany it. Focus is a 2px #1D2F44 ring on every control; tap targets are 44px minimum; the hatch that marks unrecoverable material is a texture, not a colour, so it survives greyscale and colour-blind rendering.

## Imagery Direction

### Pairs With

ozalid

### Illustration Style

Duotone diazo contact prints pulled from a scanned original: near-black continuous tone plus a pale archival-blue second exposure a few millimetres out of register, on translucent vellum, with soft edge halation, fine paper grain and scattered dust.

### Hero Image Direction

One full-bleed plate photographed straight down onto a lit light table, composed so that a third to a half of the frame is plain empty tabletop reserved for display type. Cool neutral only — no warm or sepia cast, no burnt frame borders.

### Subjects

Evidence abstractions: plates and overlay sheets on lit glass, contact sheets with blank frames, damaged emulsion, stacked glassine. Never character art, mascots or decorative kanji.

### Icon Style

Drawn 1-1.2px strokes on a square grid — chevrons, arrows and crosses built from two straight lines. No filled pictograms, no rounded joins, no emoji.

### Image Gen Prompts

- A cracked glass photographic plate on a lit light table, seen straight down, with the whole upper-left third plain empty tabletop — duotone diazo contact print, near-black ink and pale archival blue out of register on translucent vellum, soft halation, paper grain, dust. NO text, NO letters, NO logos.
- A contact sheet of thirty small frames, a dozen of them completely blank — duotone diazo contact print, near-black ink and pale archival blue out of register on translucent vellum, soft halation, paper grain. NO text, NO letters, NO logos.

### Swap Contract

Every raster plate in the landing is consumed through a --plate-N variable with the URL as the inline default at every use site, documented in a <!-- plate-manifest --> comment; the WebGL ground reads its texture URL from --plate-2a, so an art-style swap re-skins the shader too.
shadcn/ui theme
```json
{
  "$schema": "https://ui.shadcn.com/schema/registry-item.json",
  "name": "acetate",
  "type": "registry:theme",
  "title": "Acetate shadcn Theme",
  "cssVars": {
    "theme": {},
    "light": {
      "background": "#F7F6F1",
      "foreground": "#111316",
      "card": "#FDFDFB",
      "card-foreground": "#111316",
      "popover": "#FDFDFB",
      "popover-foreground": "#111316",
      "primary": "#111316",
      "primary-foreground": "#ffffff",
      "secondary": "#f4f4f5",
      "secondary-foreground": "#111111",
      "muted": "#565E67",
      "muted-foreground": "#111316",
      "accent": "#6E9EC8",
      "accent-foreground": "#ffffff",
      "destructive": "#7A4139",
      "border": "#111316",
      "input": "#111316",
      "ring": "#6E9EC8",
      "chart-1": "#111316",
      "chart-2": "#f4f4f5",
      "chart-3": "#6E9EC8",
      "chart-4": "#3D6255",
      "chart-5": "#6F5B2E",
      "sidebar": "#FDFDFB",
      "sidebar-foreground": "#111316",
      "sidebar-primary": "#111316",
      "sidebar-primary-foreground": "#ffffff",
      "sidebar-accent": "#1D2F44",
      "sidebar-accent-foreground": "#ffffff",
      "sidebar-border": "#111316",
      "sidebar-ring": "#6E9EC8",
      "radius": "16px"
    },
    "dark": {
      "background": "#0f1115",
      "foreground": "#f8fafc",
      "card": "#181b22",
      "card-foreground": "#f8fafc",
      "popover": "#181b22",
      "popover-foreground": "#f8fafc",
      "primary": "#111316",
      "primary-foreground": "#ffffff",
      "secondary": "#252a33",
      "secondary-foreground": "#f8fafc",
      "muted": "#252a33",
      "muted-foreground": "#a1a1aa",
      "accent": "#6E9EC8",
      "accent-foreground": "#ffffff",
      "destructive": "#7A4139",
      "border": "#303642",
      "input": "#303642",
      "ring": "#6E9EC8",
      "chart-1": "#111316",
      "chart-2": "#f4f4f5",
      "chart-3": "#6E9EC8",
      "chart-4": "#3D6255",
      "chart-5": "#6F5B2E",
      "sidebar": "#181b22",
      "sidebar-foreground": "#f8fafc",
      "sidebar-primary": "#111316",
      "sidebar-primary-foreground": "#ffffff",
      "sidebar-accent": "#6E9EC8",
      "sidebar-accent-foreground": "#ffffff",
      "sidebar-border": "#303642",
      "sidebar-ring": "#6E9EC8",
      "radius": "16px"
    }
  },
  "meta": {
    "source": "katagami",
    "languageId": "en-019ffc42-54d8-7973-9df1-3276335bb669",
    "slug": "acetate",
    "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",
        "accent_2",
        "accent_soft",
        "bg",
        "border",
        "error",
        "info",
        "muted",
        "on_accent",
        "success",
        "surface",
        "surface_solid",
        "text",
        "warning"
      ],
      "typography": [
        "base_size",
        "body_font",
        "google_fonts_url",
        "heading_font",
        "heading_transform",
        "heading_weight",
        "letter_spacing",
        "line_height",
        "mono_font",
        "scale_ratio"
      ],
      "radii": [
        "full",
        "lg",
        "md",
        "none"
      ],
      "shadows": [
        "lg",
        "md",
        "sm"
      ],
      "spacing": [
        "base",
        "scale"
      ],
      "surfaces": [
        "bg_pattern",
        "card_style",
        "treatment"
      ],
      "borders": [
        "accent_width",
        "character",
        "default_width",
        "style"
      ],
      "motion": [
        "duration",
        "easing",
        "philosophy"
      ]
    }
  }
}
```
in the wild

embodiments

DESIGN.md

at a glance

Typography

headline-lgOswald · 33px · 700

The quick brown fox jumps

headline-mdOswald · 27px · 600

The quick brown fox jumps

body-mdGelasio · 17px · 400

The quick brown fox jumps

label-mdCutive Mono · 12px · 600

The quick brown fox jumps

shadcn/ui

implementation kit

built with
Palette
Credits · in the lineage of
  • Diazo (Ozalid) reprographic printingTraditionThe pale blue-on-vellum duotone, the soft edge halation and the out-of-register second exposure the imagery is built on.
  • Photographic conservation and archival description practiceTraditionAccession numbering, chain-of-custody notes, condition reporting, and the discipline of recording losses rather than repairing them.
  • Manga page architectureTraditionAsymmetric ink panel frames, unequal spans, visible gutters and the deliberate single break where an element crosses a boundary — used structurally, never as illustration.
  • Swiss typographic instrumentation and laboratory notationMovementThe condensed uppercase labelling, ruler-tick rails, rotated microtype and monospaced machine values.
  • Prepress registration marks and crop-mark conventionTraditionCorner registration ticks, calibration notches and the misregistration-as-measurement idea at the centre of the language.

A generated style is an aggregate of many influences — credit is given to the artists and traditions it draws on, not a claim of authorship.

produced by claude-opus-5 · sourced by claude-opus-5 · images by FLUX1.1 [pro] ultra

remix lane

try a remix

Keep Acetate and swap a palette and an art style onto it. The landing & dashboard recolor live.

UI language · fixed
Acetate
Palette
Art style
Landing Page
live preview · recolored + filled
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