Sextant

# Sextant

## Philosophy

Sextant is a dark night-survey console for systems read under pressure. It plots every value against an exposed coordinate field — corner ticks, a dimension scale, and a single travelling crosshair that fixes the live datum — and spends one rationed signal ink only on the figure that matters. Order comes from position on the field and tabular figures, never from boxes or shadow.

### Values

- a value is a point plotted on a measured field
- one rationed signal ink, landing only on the live fix
- position on the coordinate field is hierarchy
- tabular mono so figures line up like a survey sheet
- hairline rules and open space on a deep midnight ground, never boxes and shadows

### Anti-Values

- defaulting the ground to white
- an accent bar stamped on every section or a signal-ink flood
- centred, symmetric, decorative composition
- rounded friendly cards and soft drop shadows
- the oversized italic serif or the serif-italic headline swap

### Visual Character

- a deep midnight-ink survey bed with warm bone type and one rationed signal vermilion
- an exposed coordinate field framed by cyan corner ticks and a dimension scale
- a single travelling crosshair plot-head that fixes the live datum
- hairline graphite-blue rules separating modules and rows with no decorative framing
- oversized flush-left neo-grotesk headlines with a colour-pop mark on one word
- small uppercase mono labels tracked wide and aligned to a baseline grid

## Tokens

### Colors

| Name | Value |
|------|-------|
| bg | `#0A1120` |
| surface | `#101A2E` |
| surface_2 | `#16233C` |
| recess | `#070D18` |
| text | `#ECE9DF` |
| muted | `#8492AB` |
| border | `#233655` |
| accent | `#F23A2F` |
| on_accent | `#0A1120` |
| plot | `#2FD4C6` |
| gold | `#E7B53C` |
| success | `#2FD4C6` |
| warning | `#E7B53C` |
| error | `#F23A2F` |
| info | `#2FD4C6` |

### Typography

- **Base Size**: 17px
- **Body Font**: IBM Plex Sans, Arial, sans-serif
- **Heading Font**: Archivo, Helvetica Neue, Arial, sans-serif
- **Mono Font**: IBM Plex Mono, ui-monospace, monospace
- **Heading Weight**: 900
- **Heading Transform**: none
- **Letter Spacing**: -0.035em
- **Line Height**: 1.5
- **Google Fonts Url**: https://fonts.googleapis.com/css2?family=Archivo:wght@500;600;700;800;900&family=IBM+Plex+Sans:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600&display=swap

### Radii

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

### Shadows

- **Sm**: none
- **Md**: none
- **Lg**: none

### Spacing

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

### Surfaces

- **Treatment**: flat dark plane
- **Card Style**: flat midnight planes framed by cyan coordinate corner ticks and hairline rules; no elevation, no accent edges
- **Bg Pattern**: coordinate-field

### Borders

- **Default Width**: 1px
- **Style**: solid
- **Character**: hairline graphite-blue rules as structural dividers; cyan L-ticks mark coordinate corners; a 2px bone key line tops tables

### Motion

- **Duration**: 200ms
- **Easing**: cubic-bezier(0.2,0,0,1)
- **Philosophy**: snappy reveals that arm a crosshair onto the live fix; the settled state renders with no JS; respects prefers-reduced-motion

## Rules

### Composition

Plot content to an exposed coordinate field on a deep midnight ground. Frame measured planes with cyan corner ticks, not boxes or shadows; separate modules with hairline rules and open space. A dimension scale anchors the hero foot and a left platform track docks dashboard sections.

### Hierarchy

Hierarchy comes from position on the field, scale jumps, weight, and the rationed signal ink. Headlines are oversized flush-left Archivo with a colour-pop mark on one word; labels are compact uppercase mono on a baseline grid; figures are tabular mono.

### Density

High legibility at medium-high density: large outer margins, tight headline leading, ordered tables, an 8px baseline rhythm. Whitespace is architectural, not padding inflation.

### Signature

An exposed coordinate field with cyan corner ticks and a dimension scale; a single travelling vermilion crosshair fixes the live datum; numerics fall into tabular mono and the signal ink lands only on the fixed or live value.

## Layout

### Grid

A measured field with large outer margins and flexible content columns; wide content spans the main column, readouts and meters take shorter bands; the dashboard runs a left platform track (236px) with numbered stops. Modules separate with hairline rules and cyan corner ticks.

### Whitespace

Structural and architectural: large outer margins, 48-96px between sections, an 8px baseline rhythm inside content; negative space frames typography like a poster.

### Density

medium-high

### Responsive

Desktop keeps the full field and multi-column readouts; at ~900px plots and pairs stack and nav links collapse; at ~560px the dashboard rail collapses to a horizontal track of section words, tiles stack, tables drop non-essential columns, and the hero headline shrinks with clamp() so it never clips at a true 390px viewport.

### Breakpoints

- **Wide**: 1440
- **Desktop**: 1024
- **Tablet**: 900
- **Mobile**: 560

## Guidance

### Do

- Plot values to the coordinate field; let position carry hierarchy.
- Ration the vermilion to the live or fixed figure only.
- Set every number in tabular mono so columns align.
- Separate modules with hairline rules and cyan corner ticks instead of boxes.
- Keep the ground deep midnight ink; let bone type and one signal ink do the work.

### Don't

- Do not stamp the accent bar on every section or flood a panel with signal ink.
- Do not centre headlines or balance the page symmetrically.
- Do not add rounded friendly cards, soft shadows, or glass.
- Do not use the serif-italic headline swap or an oversized italic serif.
- Do not default the ground to white; this language lives in the dark.

### Accessibility

Warm bone text on a deep midnight ground holds high contrast; the rationed vermilion and cyan are reinforced with labels and dots, never colour alone; focus states use a cyan border; motion respects prefers-reduced-motion and the settled state renders with no JS.

## Imagery Direction

### Pairs With

offset-spot-print

### Summary

Flat-layered spot-ink screenprint imagery on coarse paper: a deep midnight ground, warm bone planes, and one signal vermilion mark, with a soft halftone mid-tone screen, a hair of misregistration, and printer's registration crop marks at the corners. Sparse and diagrammatic — aerial survey plans, rail yards, plotted city blocks; prefer live data, numbered fields, and typographic rhythm over decorative pictures.

### Subjects

- aerial survey plans and plotted city blocks
- rail yards and platforms
- single iconic objects
- harbour and coastline charts
- three-quarter portraits

### Usage

One full-bleed screenprint hero with a calm dark third reserved for the headline overlay; otherwise let data and type lead.

---
version: "alpha"
name: "Sextant"
description: "Agent-curated design language exported from Katagami as DESIGN.md."
colors:
  bg: "#0A1120"
  surface: "#101A2E"
  surface_2: "#16233C"
  recess: "#070D18"
  text: "#ECE9DF"
  muted: "#8492AB"
  border: "#233655"
  accent: "#F23A2F"
  on_accent: "#0A1120"
  plot: "#2FD4C6"
  gold: "#E7B53C"
  success: "#2FD4C6"
  warning: "#E7B53C"
  error: "#F23A2F"
  info: "#2FD4C6"
typography:
  headline-lg:
    fontFamily: "Archivo, Helvetica Neue, Arial, sans-serif"
    fontSize: "2.075rem"
    fontWeight: 700
    lineHeight: 1.1
    letterSpacing: "-0.035em"
  headline-md:
    fontFamily: "Archivo, Helvetica Neue, Arial, sans-serif"
    fontSize: "1.66rem"
    fontWeight: 600
    lineHeight: 1.15
    letterSpacing: "-0.035em"
  body-md:
    fontFamily: "IBM Plex Sans, Arial, sans-serif"
    fontSize: "17px"
    fontWeight: 400
    lineHeight: 1.5
    letterSpacing: "-0.035em"
  label-md:
    fontFamily: "IBM Plex Mono, ui-monospace, monospace"
    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: "16px"
  lg: "24px"
  xl: "32px"
  2xl: "48px"
  3xl: "64px"
  4xl: "96px"
components:
  color-reference-bg:
    backgroundColor: "{colors.bg}"
  color-reference-surface:
    backgroundColor: "{colors.surface}"
  color-reference-surface_2:
    backgroundColor: "{colors.surface_2}"
  color-reference-recess:
    backgroundColor: "{colors.recess}"
  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-on_accent:
    backgroundColor: "{colors.on_accent}"
  color-reference-plot:
    backgroundColor: "{colors.plot}"
  color-reference-gold:
    backgroundColor: "{colors.gold}"
  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"
---

# Sextant

## Overview

Sextant is a dark night-survey console for systems read under pressure. It plots every value against an exposed coordinate field — corner ticks, a dimension scale, and a single travelling crosshair that fixes the live datum — and spends one rationed signal ink only on the figure that matters. Order comes from position on the field and tabular figures, never from boxes or shadow.

### Values

- a value is a point plotted on a measured field
- one rationed signal ink, landing only on the live fix
- position on the coordinate field is hierarchy
- tabular mono so figures line up like a survey sheet
- hairline rules and open space on a deep midnight ground, never boxes and shadows

### Anti-Values

- defaulting the ground to white
- an accent bar stamped on every section or a signal-ink flood
- centred, symmetric, decorative composition
- rounded friendly cards and soft drop shadows
- the oversized italic serif or the serif-italic headline swap

### Visual Character

- a deep midnight-ink survey bed with warm bone type and one rationed signal vermilion
- an exposed coordinate field framed by cyan corner ticks and a dimension scale
- a single travelling crosshair plot-head that fixes the live datum
- hairline graphite-blue rules separating modules and rows with no decorative framing
- oversized flush-left neo-grotesk headlines with a colour-pop mark on one word
- small uppercase mono labels tracked wide and aligned to a baseline grid

## 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 | `#0A1120` |
| surface | `#101A2E` |
| surface_2 | `#16233C` |
| recess | `#070D18` |
| text | `#ECE9DF` |
| muted | `#8492AB` |
| border | `#233655` |
| accent | `#F23A2F` |
| on_accent | `#0A1120` |
| plot | `#2FD4C6` |
| gold | `#E7B53C` |
| success | `#2FD4C6` |
| warning | `#E7B53C` |
| error | `#F23A2F` |
| info | `#2FD4C6` |

## Typography

- **Headline-Lg**: Archivo, Helvetica Neue, Arial, sans-serif, 2.075rem, weight 700, line-height 1.1.
- **Headline-Md**: Archivo, Helvetica Neue, Arial, sans-serif, 1.66rem, weight 600, line-height 1.15.
- **Body-Md**: IBM Plex Sans, Arial, sans-serif, 17px, weight 400, line-height 1.5.
- **Label-Md**: IBM Plex Mono, ui-monospace, monospace, 0.75rem, weight 600, line-height 1.

## Layout

### Spacing Tokens

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

### Grid

A measured field with large outer margins and flexible content columns; wide content spans the main column, readouts and meters take shorter bands; the dashboard runs a left platform track (236px) with numbered stops. Modules separate with hairline rules and cyan corner ticks.

### Whitespace

Structural and architectural: large outer margins, 48-96px between sections, an 8px baseline rhythm inside content; negative space frames typography like a poster.

### Density

medium-high

### Responsive

Desktop keeps the full field and multi-column readouts; at ~900px plots and pairs stack and nav links collapse; at ~560px the dashboard rail collapses to a horizontal track of section words, tiles stack, tables drop non-essential columns, and the hero headline shrinks with clamp() so it never clips at a true 390px viewport.

### Breakpoints

- **Wide**: 1440
- **Desktop**: 1024
- **Tablet**: 900
- **Mobile**: 560

## Elevation & Depth

### Shadows

- **Sm**: none
- **Md**: none
- **Lg**: none

## Shapes

### Rounded

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

### Surfaces

- **Treatment**: flat dark plane
- **Card Style**: flat midnight planes framed by cyan coordinate corner ticks and hairline rules; no elevation, no accent edges
- **Bg Pattern**: coordinate-field

### Borders

- **Default Width**: 1px
- **Style**: solid
- **Character**: hairline graphite-blue rules as structural dividers; cyan L-ticks mark coordinate corners; a 2px bone key line tops tables

## Components

### Composition

Plot content to an exposed coordinate field on a deep midnight ground. Frame measured planes with cyan corner ticks, not boxes or shadows; separate modules with hairline rules and open space. A dimension scale anchors the hero foot and a left platform track docks dashboard sections.

### Hierarchy

Hierarchy comes from position on the field, scale jumps, weight, and the rationed signal ink. Headlines are oversized flush-left Archivo with a colour-pop mark on one word; labels are compact uppercase mono on a baseline grid; figures are tabular mono.

### Density

High legibility at medium-high density: large outer margins, tight headline leading, ordered tables, an 8px baseline rhythm. Whitespace is architectural, not padding inflation.

### Signature

An exposed coordinate field with cyan corner ticks and a dimension scale; a single travelling vermilion crosshair fixes the live datum; numerics fall into tabular mono and the signal ink lands only on the fixed or live value.

## 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-019efd3c-d7e7-7cc2-9df0-f854471e45ff/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 Plot values to the coordinate field; let position carry hierarchy.
- Do Ration the vermilion to the live or fixed figure only.
- Do Set every number in tabular mono so columns align.
- Do Separate modules with hairline rules and cyan corner ticks instead of boxes.
- Do Keep the ground deep midnight ink; let bone type and one signal ink do the work.
- Don't Do not stamp the accent bar on every section or flood a panel with signal ink.
- Don't Do not centre headlines or balance the page symmetrically.
- Don't Do not add rounded friendly cards, soft shadows, or glass.
- Don't Do not use the serif-italic headline swap or an oversized italic serif.
- Don't Do not default the ground to white; this language lives in the dark.

### Accessibility

Warm bone text on a deep midnight ground holds high contrast; the rationed vermilion and cyan are reinforced with labels and dots, never colour alone; focus states use a cyan border; motion respects prefers-reduced-motion and the settled state renders with no JS.

## Imagery Direction

### Pairs With

offset-spot-print

### Summary

Flat-layered spot-ink screenprint imagery on coarse paper: a deep midnight ground, warm bone planes, and one signal vermilion mark, with a soft halftone mid-tone screen, a hair of misregistration, and printer's registration crop marks at the corners. Sparse and diagrammatic — aerial survey plans, rail yards, plotted city blocks; prefer live data, numbered fields, and typographic rhythm over decorative pictures.

### Subjects

- aerial survey plans and plotted city blocks
- rail yards and platforms
- single iconic objects
- harbour and coastline charts
- three-quarter portraits

### Usage

One full-bleed screenprint hero with a calm dark third reserved for the headline overlay; otherwise let data and type lead.

```json
{
  "$schema": "https://ui.shadcn.com/schema/registry-item.json",
  "name": "sextant",
  "type": "registry:theme",
  "title": "Sextant shadcn Theme",
  "cssVars": {
    "theme": {},
    "light": {
      "background": "#0A1120",
      "foreground": "#ECE9DF",
      "card": "#101A2E",
      "card-foreground": "#ECE9DF",
      "popover": "#101A2E",
      "popover-foreground": "#ECE9DF",
      "primary": "#ECE9DF",
      "primary-foreground": "#111111",
      "secondary": "#f4f4f5",
      "secondary-foreground": "#111111",
      "muted": "#8492AB",
      "muted-foreground": "#ECE9DF",
      "accent": "#F23A2F",
      "accent-foreground": "#ffffff",
      "destructive": "#F23A2F",
      "border": "#233655",
      "input": "#233655",
      "ring": "#F23A2F",
      "chart-1": "#ECE9DF",
      "chart-2": "#f4f4f5",
      "chart-3": "#F23A2F",
      "chart-4": "#2FD4C6",
      "chart-5": "#E7B53C",
      "sidebar": "#101A2E",
      "sidebar-foreground": "#ECE9DF",
      "sidebar-primary": "#ECE9DF",
      "sidebar-primary-foreground": "#111111",
      "sidebar-accent": "#2FD4C6",
      "sidebar-accent-foreground": "#ffffff",
      "sidebar-border": "#233655",
      "sidebar-ring": "#F23A2F",
      "radius": "0px"
    },
    "dark": {
      "background": "#0f1115",
      "foreground": "#f8fafc",
      "card": "#181b22",
      "card-foreground": "#f8fafc",
      "popover": "#181b22",
      "popover-foreground": "#f8fafc",
      "primary": "#ECE9DF",
      "primary-foreground": "#111111",
      "secondary": "#252a33",
      "secondary-foreground": "#f8fafc",
      "muted": "#252a33",
      "muted-foreground": "#a1a1aa",
      "accent": "#F23A2F",
      "accent-foreground": "#ffffff",
      "destructive": "#F23A2F",
      "border": "#303642",
      "input": "#303642",
      "ring": "#F23A2F",
      "chart-1": "#ECE9DF",
      "chart-2": "#f4f4f5",
      "chart-3": "#F23A2F",
      "chart-4": "#2FD4C6",
      "chart-5": "#E7B53C",
      "sidebar": "#181b22",
      "sidebar-foreground": "#f8fafc",
      "sidebar-primary": "#ECE9DF",
      "sidebar-primary-foreground": "#111111",
      "sidebar-accent": "#F23A2F",
      "sidebar-accent-foreground": "#ffffff",
      "sidebar-border": "#303642",
      "sidebar-ring": "#F23A2F",
      "radius": "0px"
    }
  },
  "meta": {
    "source": "katagami",
    "languageId": "en-019efd3c-d7e7-7cc2-9df0-f854471e45ff",
    "slug": "sextant",
    "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",
        "bg",
        "border",
        "error",
        "gold",
        "info",
        "muted",
        "on_accent",
        "plot",
        "recess",
        "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",
        "sm"
      ],
      "shadows": [
        "lg",
        "md",
        "sm"
      ],
      "spacing": [
        "base",
        "scale"
      ],
      "surfaces": [
        "bg_pattern",
        "card_style",
        "treatment"
      ],
      "borders": [
        "character",
        "default_width",
        "style"
      ],
      "motion": [
        "duration",
        "easing",
        "philosophy"
      ]
    }
  }
}
```