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design language·marquee

Marquee

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 source of truth for most agents and apps.

the spec

specification

philosophy
summary
An arcade attract screen as a design language. Liquid-chrome surfaces float on a deep electric-violet void; a runway of round marquee bulbs chases along every lit sign; and three neon tubes — cyan live, magenta selected, one rationed amber glint — glow like the lamps on a freshly waxed cabinet at midnight. It takes the retrofuturist chrome-and-neon brief through the arcade-nostalgia door rather than the cockpit one: the page is a lit marquee, not an instrument deck. Counts read off a glowing odometer, not a needle; the high-score table is the structural spine.
values
The marquee is the interface — content is staged like a cabinet's attract mode: a lit chrome sign, a chasing bulb runway, an odometer score, a coin-op leaderboard.Bulbs are the heartbeat — a perimeter band of round lamps frames every sign and chases in sequence; the bulb runway is the ownable mechanic.Numbers are lit, never plotted — values read off segmented odometer lamps in one accent, straight off the lamps, never from a dial or needle.Chrome on violet — brushed liquid-chrome plates on a deep electric-violet ground; no washes, no muddy tints, pure metal on deep colour.Three bulbs, rationed — cyan means live, magenta means selected, a single amber glint means it needs you; each accent stays a small fraction of the surface.Type as a sign — Bungee reads as a bulb-lit marquee, Space Grotesk carries the body, DM Mono keeps the readouts.
anti-values
×Needle gauges and dials — Marquee reads its numbers, it does not point at them.×Blue-black or white default grounds — the identity is electric violet, chosen by concept.×Lone accent edges on cards — surfaces are framed all the way around in chrome, never striped.×Neon or pastel washes across whole panels — accents glow on small parts, never as fills.×Boxed pill nav widgets — navigation breathes as part of the page.
tokens
colors19 items
bg
#16052E
bg_2
#1F0A40
surface
#250D4A
surface_2
#2E1158
panel
#1B0838
text
#F4ECFF
muted
#B49AD6
border
#3C1C6E
rule
#3C1C6E
chrome_hi
#EDE6FF
chrome_lo
#8E78BE
accent
#FFC23D
accent_2
#FF4FD8
accent_3
#3CE0FF
on_accent
#2A0A12
success
#46E6A6
warning
#FFC23D
error
#FF5C7A
info
#3CE0FF
typography9 items
base size
17px
body font
Space Grotesk
heading font
Bungee
mono font
DM Mono
heading weight
400
heading transform
uppercase
letter spacing
-0.01em
line height
1.55
google fonts url
https://fonts.googleapis.com/css2?family=Bungee:wght@400&family=Bungee+Inline&family=Space+Grotesk:wght@400;500;600;700&family=DM+Mono:wght@400;500&display=swap
radii4 items
none
0px
md
16px
lg
24px
full
9999px
shadows5 items
md
0 24px 60px rgba(5,0,20,.6)
chrome inset
inset 0 1px 0 rgba(255,255,255,.10)
glow amber
0 0 22px rgba(255,194,61,.55)
glow magenta
0 0 22px rgba(255,79,216,.5)
glow cyan
0 0 22px rgba(60,224,255,.5)
spacing2 items
base
8px
scale
8px, 12px, 16px, 24px, 32px, 48px, 64px, 96px
surfaces4 items
treatment
brushed-chrome-on-violet
card style
A brushed-chrome plate: violet-to-floor gradient fill, a full 1px violet frame plus an inset top highlight, 24px radius, cast shadow. Framed all the way around — never a single coloured edge, never nested.
bg pattern
bulb-grain-dot-field
material
Liquid-chrome gradient (#D9CFF2 -> #6E5598) with a vertical sheen; a soft bulb-grain dot field sits over the deep electric-violet ground.
borders4 items
default width
1px
accent width
2px
style
full-frame
character
Containers carry a full 1px violet frame with a chrome top highlight, never a lone accent edge. Inputs are sunken coin-slot wells; focus turns the rim cyan with a cyan glow ring.
motion3 items
duration
220ms
easing
cubic-bezier(0.34,1.56,0.64,1)
philosophy
A marquee bulb chase plus a servo-spring overshoot — controls and bulbs overshoot then lock. The settled state is the default and renders with no JavaScript; an inline script sets a class on <html> to gate the hidden start-state and reveals, respecting prefers-reduced-motion.
rules
composition
Frame every sign in a full chrome bezel with a perimeter bulb runway; let the bulbs chase in sequence.Read counts off odometer lamps in a single accent — never a needle, dial, or flat numeric card.Frame containers all the way around in 1px chrome; never a lone accent edge, never nested.Keep cyan, magenta, and amber each a small fraction of the surface — bulbs and rims, not fills.Run a soft bulb-grain dot field over the electric-violet void for arcade depth.
hierarchy
Display titles and the masthead use Bungee caps with a liquid-chrome gradient fill and a faint neon halo.Nav, labels, scores, and timestamps use DM Mono tracked-caps.Body copy uses Space Grotesk at 17px, read-light on the violet or muted for secondary.The primary action is a single bulb-amber instrument button with an amber glow; the rest stay dark chrome.Status is a register-mark badge with a lit dot — cyan live, magenta selected, amber needs-you — never a coloured field.
density
Comfortable coin-op density: a large Bungee marquee and odometer lamps balanced by compact DM Mono readouts and a tightly ruled high-score leaderboard on chrome plates.
signature
Marquee bulb runway: a perimeter band of round lamps framing each sign, chasing in a 3-step sequence.Liquid-chrome neon-tube wordmark set in Bungee with a magenta+cyan halo.Odometer score lamps: segmented near-black digit cells glowing in one accent, read straight off the lamps.Coin-slot input wells with a cyan focus rim, and chrome spring toggles.High-score / coin-op leaderboard as the structural spine, with a magenta wash on the leader.
layout
grid
type
centered-stage
max width
1180px
gutter
24px
margin
24px
column behavior
A centred marquee stage above a single-column coin-op rhythm; dashboards use a 240px sidebar plus fluid main.
whitespace
section gap
96px desktop, 48px mobile
card gap
24px
content padding
32px
approach
Generous space so bulbs and chrome breathe against the violet void.
density
default
comfortable
comfortable
button height 48px·input height 48px·row height row-ruled mono
responsive

Single-column stack on mobile with nav links hidden and the wordmark clamped; capped and centred on ultra-wide with only the hero spanning 100vw.

breakpoints
mobile
390px
tablet
768px
desktop
1180px
ultrawide
2560px
guidance
do
  • Frame signs in a chrome bezel with a chasing bulb runway.
  • Read numbers off odometer lamps in one accent.
  • Ration cyan, magenta, and amber like highlighters on bulbs and rims.
  • Let nav breathe as part of the page; build hierarchy with space, type, and surface.
  • Style every control explicitly — coin-slot wells, chrome spring toggles.
  • Use Bungee for the marquee wordmark, DM Mono for readouts, Space Grotesk for body.
avoid
  • Don't put a lone accent edge on a card.
  • Don't render values as needles or dials.
  • Don't wash whole panels in neon or pastel.
  • Don't box the nav into a floating pill bar.
  • Don't default the ground to white or blue-black.
  • Don't put emoji or symbol glyphs on buttons — use SVG primitives.
imagery
pairs with

lustre

summary
Liquid-chrome arcade renders on a deep electric-violet space-black void — a single bold chrome subject filling the frame, lit by cyan and magenta neon rims with one amber glint and a faint scanline.
subjects
arcade joystick with ball-topchrome coin slotcabinet control panelmarquee signpinball flipperscore reel
usage
One full-bleed chrome hero per landing; mid-complexity chrome objects for features; tightly-framed chrome busts for avatars. Always full-frame, never inset, no text.
katagami spec
# Marquee

## Philosophy

An arcade attract screen as a design language. Liquid-chrome surfaces float on a deep electric-violet void; a runway of round marquee bulbs chases along every lit sign; and three neon tubes — cyan live, magenta selected, one rationed amber glint — glow like the lamps on a freshly waxed cabinet at midnight. It takes the retrofuturist chrome-and-neon brief through the arcade-nostalgia door rather than the cockpit one: the page is a lit marquee, not an instrument deck. Counts read off a glowing odometer, not a needle; the high-score table is the structural spine.

### Values

- The marquee is the interface — content is staged like a cabinet's attract mode: a lit chrome sign, a chasing bulb runway, an odometer score, a coin-op leaderboard.
- Bulbs are the heartbeat — a perimeter band of round lamps frames every sign and chases in sequence; the bulb runway is the ownable mechanic.
- Numbers are lit, never plotted — values read off segmented odometer lamps in one accent, straight off the lamps, never from a dial or needle.
- Chrome on violet — brushed liquid-chrome plates on a deep electric-violet ground; no washes, no muddy tints, pure metal on deep colour.
- Three bulbs, rationed — cyan means live, magenta means selected, a single amber glint means it needs you; each accent stays a small fraction of the surface.
- Type as a sign — Bungee reads as a bulb-lit marquee, Space Grotesk carries the body, DM Mono keeps the readouts.

### Anti-Values

- Needle gauges and dials — Marquee reads its numbers, it does not point at them.
- Blue-black or white default grounds — the identity is electric violet, chosen by concept.
- Lone accent edges on cards — surfaces are framed all the way around in chrome, never striped.
- Neon or pastel washes across whole panels — accents glow on small parts, never as fills.
- Boxed pill nav widgets — navigation breathes as part of the page.

### Visual Character

- A perimeter runway of round marquee bulbs frames the masthead and CTA banners and chases in a 3-step sequence, lit in bulb-amber.
- The wordmark is a liquid-chrome metallic gradient fill with a faint magenta+cyan neon halo, set in Bungee.
- Counts render as odometer lamps: segmented near-black digit cells glowing in one accent — cyan, amber, or magenta — read straight off the lamps.
- Inputs are sunken coin-slot wells with an inset shadow; focus lights the rim cyan with a cyan glow ring.
- The high-score / coin-op leaderboard is the structural spine of every screen; today's leader pulls a magenta wash. A soft bulb-grain dot field sits over the violet void.

## Tokens

### Colors

| Name | Value |
|------|-------|
| bg | `#16052E` |
| bg_2 | `#1F0A40` |
| surface | `#250D4A` |
| surface_2 | `#2E1158` |
| panel | `#1B0838` |
| text | `#F4ECFF` |
| muted | `#B49AD6` |
| border | `#3C1C6E` |
| rule | `#3C1C6E` |
| chrome_hi | `#EDE6FF` |
| chrome_lo | `#8E78BE` |
| accent | `#FFC23D` |
| accent_2 | `#FF4FD8` |
| accent_3 | `#3CE0FF` |
| on_accent | `#2A0A12` |
| success | `#46E6A6` |
| warning | `#FFC23D` |
| error | `#FF5C7A` |
| info | `#3CE0FF` |

### Typography

- **Base Size**: 17px
- **Body Font**: Space Grotesk
- **Heading Font**: Bungee
- **Mono Font**: DM Mono
- **Heading Weight**: 400
- **Heading Transform**: uppercase
- **Letter Spacing**: -0.01em
- **Line Height**: 1.55
- **Google Fonts Url**: https://fonts.googleapis.com/css2?family=Bungee:wght@400&family=Bungee+Inline&family=Space+Grotesk:wght@400;500;600;700&family=DM+Mono:wght@400;500&display=swap

### Radii

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

### Shadows

- **Md**: 0 24px 60px rgba(5,0,20,.6)
- **Chrome Inset**: inset 0 1px 0 rgba(255,255,255,.10)
- **Glow Amber**: 0 0 22px rgba(255,194,61,.55)
- **Glow Magenta**: 0 0 22px rgba(255,79,216,.5)
- **Glow Cyan**: 0 0 22px rgba(60,224,255,.5)

### Spacing

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

### Surfaces

- **Treatment**: brushed-chrome-on-violet
- **Card Style**: A brushed-chrome plate: violet-to-floor gradient fill, a full 1px violet frame plus an inset top highlight, 24px radius, cast shadow. Framed all the way around — never a single coloured edge, never nested.
- **Bg Pattern**: bulb-grain-dot-field
- **Material**: Liquid-chrome gradient (#D9CFF2 -> #6E5598) with a vertical sheen; a soft bulb-grain dot field sits over the deep electric-violet ground.

### Borders

- **Default Width**: 1px
- **Accent Width**: 2px
- **Style**: full-frame
- **Character**: Containers carry a full 1px violet frame with a chrome top highlight, never a lone accent edge. Inputs are sunken coin-slot wells; focus turns the rim cyan with a cyan glow ring.

### Motion

- **Duration**: 220ms
- **Easing**: cubic-bezier(0.34,1.56,0.64,1)
- **Philosophy**: A marquee bulb chase plus a servo-spring overshoot — controls and bulbs overshoot then lock. The settled state is the default and renders with no JavaScript; an inline script sets a class on <html> to gate the hidden start-state and reveals, respecting prefers-reduced-motion.

## Rules

### Composition

- Frame every sign in a full chrome bezel with a perimeter bulb runway; let the bulbs chase in sequence.
- Read counts off odometer lamps in a single accent — never a needle, dial, or flat numeric card.
- Frame containers all the way around in 1px chrome; never a lone accent edge, never nested.
- Keep cyan, magenta, and amber each a small fraction of the surface — bulbs and rims, not fills.
- Run a soft bulb-grain dot field over the electric-violet void for arcade depth.

### Hierarchy

- Display titles and the masthead use Bungee caps with a liquid-chrome gradient fill and a faint neon halo.
- Nav, labels, scores, and timestamps use DM Mono tracked-caps.
- Body copy uses Space Grotesk at 17px, read-light on the violet or muted for secondary.
- The primary action is a single bulb-amber instrument button with an amber glow; the rest stay dark chrome.
- Status is a register-mark badge with a lit dot — cyan live, magenta selected, amber needs-you — never a coloured field.

### Density

Comfortable coin-op density: a large Bungee marquee and odometer lamps balanced by compact DM Mono readouts and a tightly ruled high-score leaderboard on chrome plates.

### Signature

- Marquee bulb runway: a perimeter band of round lamps framing each sign, chasing in a 3-step sequence.
- Liquid-chrome neon-tube wordmark set in Bungee with a magenta+cyan halo.
- Odometer score lamps: segmented near-black digit cells glowing in one accent, read straight off the lamps.
- Coin-slot input wells with a cyan focus rim, and chrome spring toggles.
- High-score / coin-op leaderboard as the structural spine, with a magenta wash on the leader.

## Layout

### Grid

- **Type**: centered-stage
- **Max Width**: 1180px
- **Gutter**: 24px
- **Margin**: 24px
- **Column Behavior**: A centred marquee stage above a single-column coin-op rhythm; dashboards use a 240px sidebar plus fluid main.

### Whitespace

- **Section Gap**: 96px desktop, 48px mobile
- **Card Gap**: 24px
- **Content Padding**: 32px
- **Approach**: Generous space so bulbs and chrome breathe against the violet void.

### Density

- **Default**: comfortable
- **Comfortable**: {"button_height":"48px","input_height":"48px","row_height":"row-ruled mono"}

### Responsive

Single-column stack on mobile with nav links hidden and the wordmark clamped; capped and centred on ultra-wide with only the hero spanning 100vw.

### Breakpoints

- **Mobile**: 390px
- **Tablet**: 768px
- **Desktop**: 1180px
- **Ultrawide**: 2560px

## Guidance

### Do

- Frame signs in a chrome bezel with a chasing bulb runway.
- Read numbers off odometer lamps in one accent.
- Ration cyan, magenta, and amber like highlighters on bulbs and rims.
- Let nav breathe as part of the page; build hierarchy with space, type, and surface.
- Style every control explicitly — coin-slot wells, chrome spring toggles.
- Use Bungee for the marquee wordmark, DM Mono for readouts, Space Grotesk for body.

### Don't

- Don't put a lone accent edge on a card.
- Don't render values as needles or dials.
- Don't wash whole panels in neon or pastel.
- Don't box the nav into a floating pill bar.
- Don't default the ground to white or blue-black.
- Don't put emoji or symbol glyphs on buttons — use SVG primitives.

### Accessibility

WCAG AA on the violet ground (4.5:1 body, 3:1 large/UI). Focus is a cyan rim plus a cyan glow ring on every control. prefers-reduced-motion disables the bulb chase and reveals. Colour is always paired with a label or icon. Decorative chrome, sheen, and glow are aria-hidden.

## Imagery Direction

### Pairs With

lustre

### Summary

Liquid-chrome arcade renders on a deep electric-violet space-black void — a single bold chrome subject filling the frame, lit by cyan and magenta neon rims with one amber glint and a faint scanline.

### Subjects

- arcade joystick with ball-top
- chrome coin slot
- cabinet control panel
- marquee sign
- pinball flipper
- score reel

### Usage

One full-bleed chrome hero per landing; mid-complexity chrome objects for features; tightly-framed chrome busts for avatars. Always full-frame, never inset, no text.
DESIGN.md
---
version: "alpha"
name: "Marquee"
description: "Agent-curated design language exported from Katagami as DESIGN.md."
colors:
  bg: "#16052E"
  bg_2: "#1F0A40"
  surface: "#250D4A"
  surface_2: "#2E1158"
  panel: "#1B0838"
  text: "#F4ECFF"
  muted: "#B49AD6"
  border: "#3C1C6E"
  rule: "#3C1C6E"
  chrome_hi: "#EDE6FF"
  chrome_lo: "#8E78BE"
  accent: "#FFC23D"
  accent_2: "#FF4FD8"
  accent_3: "#3CE0FF"
  on_accent: "#2A0A12"
  success: "#46E6A6"
  warning: "#FFC23D"
  error: "#FF5C7A"
  info: "#3CE0FF"
typography:
  headline-lg:
    fontFamily: "Bungee"
    fontSize: "2.075rem"
    fontWeight: 700
    lineHeight: 1.1
    letterSpacing: "-0.01em"
  headline-md:
    fontFamily: "Bungee"
    fontSize: "1.66rem"
    fontWeight: 600
    lineHeight: 1.15
    letterSpacing: "-0.01em"
  body-md:
    fontFamily: "Space Grotesk"
    fontSize: "17px"
    fontWeight: 400
    lineHeight: 1.55
    letterSpacing: "-0.01em"
  label-md:
    fontFamily: "DM Mono"
    fontSize: "0.75rem"
    fontWeight: 600
    lineHeight: 1
    letterSpacing: "0.08em"
rounded:
  none: "0px"
  md: "16px"
  lg: "24px"
  full: "9999px"
spacing:
  base: "8px"
  xs: "8px"
  sm: "12px"
  md: "16px"
  lg: "24px"
  xl: "32px"
  2xl: "48px"
  3xl: "64px"
  4xl: "96px"
components:
  color-reference-bg:
    backgroundColor: "{colors.bg}"
  color-reference-bg_2:
    backgroundColor: "{colors.bg_2}"
  color-reference-surface:
    backgroundColor: "{colors.surface}"
  color-reference-surface_2:
    backgroundColor: "{colors.surface_2}"
  color-reference-panel:
    backgroundColor: "{colors.panel}"
  color-reference-text:
    backgroundColor: "{colors.text}"
  color-reference-muted:
    backgroundColor: "{colors.muted}"
  color-reference-border:
    backgroundColor: "{colors.border}"
  color-reference-rule:
    backgroundColor: "{colors.rule}"
  color-reference-chrome_hi:
    backgroundColor: "{colors.chrome_hi}"
  color-reference-chrome_lo:
    backgroundColor: "{colors.chrome_lo}"
  color-reference-accent:
    backgroundColor: "{colors.accent}"
  color-reference-accent_2:
    backgroundColor: "{colors.accent_2}"
  color-reference-accent_3:
    backgroundColor: "{colors.accent_3}"
  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"
---

# Marquee

## Overview

An arcade attract screen as a design language. Liquid-chrome surfaces float on a deep electric-violet void; a runway of round marquee bulbs chases along every lit sign; and three neon tubes — cyan live, magenta selected, one rationed amber glint — glow like the lamps on a freshly waxed cabinet at midnight. It takes the retrofuturist chrome-and-neon brief through the arcade-nostalgia door rather than the cockpit one: the page is a lit marquee, not an instrument deck. Counts read off a glowing odometer, not a needle; the high-score table is the structural spine.

### Values

- The marquee is the interface — content is staged like a cabinet's attract mode: a lit chrome sign, a chasing bulb runway, an odometer score, a coin-op leaderboard.
- Bulbs are the heartbeat — a perimeter band of round lamps frames every sign and chases in sequence; the bulb runway is the ownable mechanic.
- Numbers are lit, never plotted — values read off segmented odometer lamps in one accent, straight off the lamps, never from a dial or needle.
- Chrome on violet — brushed liquid-chrome plates on a deep electric-violet ground; no washes, no muddy tints, pure metal on deep colour.
- Three bulbs, rationed — cyan means live, magenta means selected, a single amber glint means it needs you; each accent stays a small fraction of the surface.
- Type as a sign — Bungee reads as a bulb-lit marquee, Space Grotesk carries the body, DM Mono keeps the readouts.

### Anti-Values

- Needle gauges and dials — Marquee reads its numbers, it does not point at them.
- Blue-black or white default grounds — the identity is electric violet, chosen by concept.
- Lone accent edges on cards — surfaces are framed all the way around in chrome, never striped.
- Neon or pastel washes across whole panels — accents glow on small parts, never as fills.
- Boxed pill nav widgets — navigation breathes as part of the page.

### Visual Character

- A perimeter runway of round marquee bulbs frames the masthead and CTA banners and chases in a 3-step sequence, lit in bulb-amber.
- The wordmark is a liquid-chrome metallic gradient fill with a faint magenta+cyan neon halo, set in Bungee.
- Counts render as odometer lamps: segmented near-black digit cells glowing in one accent — cyan, amber, or magenta — read straight off the lamps.
- Inputs are sunken coin-slot wells with an inset shadow; focus lights the rim cyan with a cyan glow ring.
- The high-score / coin-op leaderboard is the structural spine of every screen; today's leader pulls a magenta wash. A soft bulb-grain dot field sits over the violet void.

## 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 | `#16052E` |
| bg_2 | `#1F0A40` |
| surface | `#250D4A` |
| surface_2 | `#2E1158` |
| panel | `#1B0838` |
| text | `#F4ECFF` |
| muted | `#B49AD6` |
| border | `#3C1C6E` |
| rule | `#3C1C6E` |
| chrome_hi | `#EDE6FF` |
| chrome_lo | `#8E78BE` |
| accent | `#FFC23D` |
| accent_2 | `#FF4FD8` |
| accent_3 | `#3CE0FF` |
| on_accent | `#2A0A12` |
| success | `#46E6A6` |
| warning | `#FFC23D` |
| error | `#FF5C7A` |
| info | `#3CE0FF` |

## Typography

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

## Layout

### Spacing Tokens

- **Base**: `8px`
- **Xs**: `8px`
- **Sm**: `12px`
- **Md**: `16px`
- **Lg**: `24px`
- **Xl**: `32px`
- **2xl**: `48px`
- **3xl**: `64px`
- **4xl**: `96px`

### Grid

- **Type**: centered-stage
- **Max Width**: 1180px
- **Gutter**: 24px
- **Margin**: 24px
- **Column Behavior**: A centred marquee stage above a single-column coin-op rhythm; dashboards use a 240px sidebar plus fluid main.

### Whitespace

- **Section Gap**: 96px desktop, 48px mobile
- **Card Gap**: 24px
- **Content Padding**: 32px
- **Approach**: Generous space so bulbs and chrome breathe against the violet void.

### Density

- **Default**: comfortable
- **Comfortable**: {"button_height":"48px","input_height":"48px","row_height":"row-ruled mono"}

### Responsive

Single-column stack on mobile with nav links hidden and the wordmark clamped; capped and centred on ultra-wide with only the hero spanning 100vw.

### Breakpoints

- **Mobile**: 390px
- **Tablet**: 768px
- **Desktop**: 1180px
- **Ultrawide**: 2560px

## Elevation & Depth

### Shadows

- **Md**: 0 24px 60px rgba(5,0,20,.6)
- **Chrome Inset**: inset 0 1px 0 rgba(255,255,255,.10)
- **Glow Amber**: 0 0 22px rgba(255,194,61,.55)
- **Glow Magenta**: 0 0 22px rgba(255,79,216,.5)
- **Glow Cyan**: 0 0 22px rgba(60,224,255,.5)

## Shapes

### Rounded

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

### Surfaces

- **Treatment**: brushed-chrome-on-violet
- **Card Style**: A brushed-chrome plate: violet-to-floor gradient fill, a full 1px violet frame plus an inset top highlight, 24px radius, cast shadow. Framed all the way around — never a single coloured edge, never nested.
- **Bg Pattern**: bulb-grain-dot-field
- **Material**: Liquid-chrome gradient (#D9CFF2 -> #6E5598) with a vertical sheen; a soft bulb-grain dot field sits over the deep electric-violet ground.

### Borders

- **Default Width**: 1px
- **Accent Width**: 2px
- **Style**: full-frame
- **Character**: Containers carry a full 1px violet frame with a chrome top highlight, never a lone accent edge. Inputs are sunken coin-slot wells; focus turns the rim cyan with a cyan glow ring.

## Components

### Composition

- Frame every sign in a full chrome bezel with a perimeter bulb runway; let the bulbs chase in sequence.
- Read counts off odometer lamps in a single accent — never a needle, dial, or flat numeric card.
- Frame containers all the way around in 1px chrome; never a lone accent edge, never nested.
- Keep cyan, magenta, and amber each a small fraction of the surface — bulbs and rims, not fills.
- Run a soft bulb-grain dot field over the electric-violet void for arcade depth.

### Hierarchy

- Display titles and the masthead use Bungee caps with a liquid-chrome gradient fill and a faint neon halo.
- Nav, labels, scores, and timestamps use DM Mono tracked-caps.
- Body copy uses Space Grotesk at 17px, read-light on the violet or muted for secondary.
- The primary action is a single bulb-amber instrument button with an amber glow; the rest stay dark chrome.
- Status is a register-mark badge with a lit dot — cyan live, magenta selected, amber needs-you — never a coloured field.

### Density

Comfortable coin-op density: a large Bungee marquee and odometer lamps balanced by compact DM Mono readouts and a tightly ruled high-score leaderboard on chrome plates.

### Signature

- Marquee bulb runway: a perimeter band of round lamps framing each sign, chasing in a 3-step sequence.
- Liquid-chrome neon-tube wordmark set in Bungee with a magenta+cyan halo.
- Odometer score lamps: segmented near-black digit cells glowing in one accent, read straight off the lamps.
- Coin-slot input wells with a cyan focus rim, and chrome spring toggles.
- High-score / coin-op leaderboard as the structural spine, with a magenta wash on the leader.

## 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-019ef9eb-68e0-7683-bbd0-8df8e5692413/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 Frame signs in a chrome bezel with a chasing bulb runway.
- Do Read numbers off odometer lamps in one accent.
- Do Ration cyan, magenta, and amber like highlighters on bulbs and rims.
- Do Let nav breathe as part of the page; build hierarchy with space, type, and surface.
- Do Style every control explicitly — coin-slot wells, chrome spring toggles.
- Do Use Bungee for the marquee wordmark, DM Mono for readouts, Space Grotesk for body.
- Don't Don't put a lone accent edge on a card.
- Don't Don't render values as needles or dials.
- Don't Don't wash whole panels in neon or pastel.
- Don't Don't box the nav into a floating pill bar.
- Don't Don't default the ground to white or blue-black.
- Don't Don't put emoji or symbol glyphs on buttons — use SVG primitives.

### Accessibility

WCAG AA on the violet ground (4.5:1 body, 3:1 large/UI). Focus is a cyan rim plus a cyan glow ring on every control. prefers-reduced-motion disables the bulb chase and reveals. Colour is always paired with a label or icon. Decorative chrome, sheen, and glow are aria-hidden.

## Imagery Direction

### Pairs With

lustre

### Summary

Liquid-chrome arcade renders on a deep electric-violet space-black void — a single bold chrome subject filling the frame, lit by cyan and magenta neon rims with one amber glint and a faint scanline.

### Subjects

- arcade joystick with ball-top
- chrome coin slot
- cabinet control panel
- marquee sign
- pinball flipper
- score reel

### Usage

One full-bleed chrome hero per landing; mid-complexity chrome objects for features; tightly-framed chrome busts for avatars. Always full-frame, never inset, no text.
shadcn/ui theme
```json
{
  "$schema": "https://ui.shadcn.com/schema/registry-item.json",
  "name": "marquee",
  "type": "registry:theme",
  "title": "Marquee shadcn Theme",
  "cssVars": {
    "theme": {},
    "light": {
      "background": "#16052E",
      "foreground": "#F4ECFF",
      "card": "#250D4A",
      "card-foreground": "#F4ECFF",
      "popover": "#250D4A",
      "popover-foreground": "#F4ECFF",
      "primary": "#F4ECFF",
      "primary-foreground": "#111111",
      "secondary": "#f4f4f5",
      "secondary-foreground": "#111111",
      "muted": "#B49AD6",
      "muted-foreground": "#F4ECFF",
      "accent": "#FFC23D",
      "accent-foreground": "#111111",
      "destructive": "#FF5C7A",
      "border": "#3C1C6E",
      "input": "#3C1C6E",
      "ring": "#FFC23D",
      "chart-1": "#F4ECFF",
      "chart-2": "#f4f4f5",
      "chart-3": "#FFC23D",
      "chart-4": "#46E6A6",
      "chart-5": "#FFC23D",
      "sidebar": "#250D4A",
      "sidebar-foreground": "#F4ECFF",
      "sidebar-primary": "#F4ECFF",
      "sidebar-primary-foreground": "#111111",
      "sidebar-accent": "#3CE0FF",
      "sidebar-accent-foreground": "#111111",
      "sidebar-border": "#3C1C6E",
      "sidebar-ring": "#FFC23D",
      "radius": "16px"
    },
    "dark": {
      "background": "#0f1115",
      "foreground": "#f8fafc",
      "card": "#181b22",
      "card-foreground": "#f8fafc",
      "popover": "#181b22",
      "popover-foreground": "#f8fafc",
      "primary": "#F4ECFF",
      "primary-foreground": "#111111",
      "secondary": "#252a33",
      "secondary-foreground": "#f8fafc",
      "muted": "#252a33",
      "muted-foreground": "#a1a1aa",
      "accent": "#FFC23D",
      "accent-foreground": "#111111",
      "destructive": "#FF5C7A",
      "border": "#303642",
      "input": "#303642",
      "ring": "#FFC23D",
      "chart-1": "#F4ECFF",
      "chart-2": "#f4f4f5",
      "chart-3": "#FFC23D",
      "chart-4": "#46E6A6",
      "chart-5": "#FFC23D",
      "sidebar": "#181b22",
      "sidebar-foreground": "#f8fafc",
      "sidebar-primary": "#F4ECFF",
      "sidebar-primary-foreground": "#111111",
      "sidebar-accent": "#FFC23D",
      "sidebar-accent-foreground": "#111111",
      "sidebar-border": "#303642",
      "sidebar-ring": "#FFC23D",
      "radius": "16px"
    }
  },
  "meta": {
    "source": "katagami",
    "languageId": "en-019ef9eb-68e0-7683-bbd0-8df8e5692413",
    "slug": "marquee",
    "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_3",
        "bg",
        "bg_2",
        "border",
        "chrome_hi",
        "chrome_lo",
        "error",
        "info",
        "muted",
        "on_accent",
        "panel",
        "rule",
        "success",
        "surface",
        "surface_2",
        "text",
        "warning"
      ],
      "typography": [
        "base_size",
        "body_font",
        "google_fonts_url",
        "heading_font",
        "heading_transform",
        "heading_weight",
        "letter_spacing",
        "line_height",
        "mono_font"
      ],
      "radii": [
        "full",
        "lg",
        "md",
        "none"
      ],
      "shadows": [
        "chrome_inset",
        "glow_amber",
        "glow_cyan",
        "glow_magenta",
        "md"
      ],
      "spacing": [
        "base",
        "scale"
      ],
      "surfaces": [
        "bg_pattern",
        "card_style",
        "material",
        "treatment"
      ],
      "borders": [
        "accent_width",
        "character",
        "default_width",
        "style"
      ],
      "motion": [
        "duration",
        "easing",
        "philosophy"
      ]
    }
  }
}
```
in the wild

embodiments

bespoke marketing landingopen full page ↗
landing · marquee
DESIGN.md

at a glance

Typography

headline-lgBungee · 33px · 700

The quick brown fox jumps

headline-mdBungee · 27px · 600

The quick brown fox jumps

body-mdSpace Grotesk · 17px · 400

The quick brown fox jumps

label-mdDM Mono · 12px · 600

The quick brown fox jumps

shadcn/ui

implementation kit

built with

Agent-generated

remix lane

try a remix

Keep Marqueeand swap a palette and an art style onto it — the landing & dashboard recolor live. The Studio does the same with all three lanes free.

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

Family

Evolved from
related

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