Kursbuch

# Kursbuch

## Philosophy

Kursbuch translates modernist clarity into an interface standard for operational surfaces — timetables, control rooms, transit information. Hierarchy comes from scale, weight, and position; structure from a strict grid and hairline rules; emphasis from type before any colour is spent. One signal red marks position and delay.

### Values

- grid discipline over improvisation
- objective communication over stylistic flourish
- flush-left typographic hierarchy with measured rhythm
- contrast through scale, weight, and placement rather than ornament
- modular systems reproducible across signage, print, and interface

### Anti-Values

- skeuomorphic texture
- centred ornamental composition
- rounded friendly softness
- decorative drop shadows and gratuitous gradients
- ambiguous hierarchy or inconsistent alignment

### Visual Character

- strict asymmetric grid with an oversized left rail for section indices and metadata
- hairline ink rules separating modules, rows, and headings with no decorative framing
- large neo-grotesk headlines flush-left with tight leading and generous surrounding space
- small uppercase utility labels tracked wide and aligned to a common baseline grid
- a limited paper-ink palette punctuated by one urgent signal red as bars, dots, and action accents

## Tokens

### Colors

| Name | Value |
|------|-------|
| bg | `#ECE9E1` |
| surface | `#FCFBF7` |
| surface_solid | `#FCFBF7` |
| text | `#121212` |
| muted | `#6F6A63` |
| border | `#121212` |
| accent | `#D62828` |
| accent_2 | `#B00020` |
| accent_soft | `#F2DEDA` |
| on_accent | `#FCFBF7` |
| success | `#1D6B3C` |
| warning | `#B26A00` |
| error | `#B00020` |
| info | `#005F8C` |

### 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**: 800
- **Heading Transform**: none
- **Letter Spacing**: -0.02em
- **Line Height**: 1.5
- **Scale Ratio**: 1.25
- **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
- **Md**: 16px
- **Lg**: 24px
- **Full**: 9999px

### Shadows

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

### Spacing

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

### Surfaces

- **Treatment**: paper
- **Card Style**: hairline-ruled planes separated by open space, no elevation
- **Bg Pattern**: grid

### Borders

- **Default Width**: 1px
- **Accent Width**: 6px
- **Style**: solid
- **Character**: hairline ink dividers; the accent bar is a thick vertical signal at the left grid edge

### Motion

- **Duration**: 140ms
- **Easing**: cubic-bezier(0.2,0,0,1)
- **Philosophy**: snappy and purposeful; settled state is the default

## Rules

### Composition

Build on a disciplined modular grid with a persistent left index rail. Every section opens with a narrow red signal bar and an oversized index number anchored to the left grid edge. Major zones are separated by open space and hairline rules, never nested boxes.

### Hierarchy

Hierarchy comes from scale jumps, weight changes, red signal markers, and grid position. Headlines are oversized Archivo, flush-left, tight leading; supporting data is compact, uppercase, and mono tabular.

### Density

Medium information density with high legibility: generous structural margins, compressed leading in headlines, and tightly ruled tables. Whitespace is architectural, never padding inflation inside controls.

### Signature Patterns

- every major section begins with a narrow red vertical bar and an oversized index number anchored to the left grid edge
- module boundaries are drawn with 1px horizontal hairline rules instead of rounded cards or shadows
- section index numbers live in an oversized detached left rail
- all utility labels are uppercase mono with wide letter-spacing on a common baseline grid
- tables, forms, and tabs use monochrome fields with hairline underlines or perimeter rules rather than filled controls
- the departure board component spends red only on delay; everything on time stays monochrome

## Layout

### Grid

Desktop section head is a 120px index rail plus a flexible content column; content blocks span controlled widths and align flush-left. Tablet (~768–1024) keeps the rail but tightens it into its own considered layout. Mobile collapses so the red bar and index sit inline above their block.

### Breakpoints

At ~1024px tighten outer margins and reduce column spans. At ~768px stack the hero and operational panels vertically while preserving rule-based separators and the tablet rail. At ~480px convert multi-column rows to a single column, make actions full-width, and allow tables to scroll horizontally inside ruled wrappers.

### Whitespace

Whitespace is structural: large outer margins, 48–64px between sections, an 8px internal baseline grid. Negative space frames typography like poster composition rather than filling gaps evenly.

## Guidance

### Do

- Spend red as a positional and delay signal, not as decorative fill.
- Keep major text flush-left; let the rag create rhythm.
- Separate information blocks with rules and space instead of extra containers.
- Use tabular mono for schedules, codes, and numeric summaries.
- Let typography carry emphasis before reaching for colour or iconography.

### Don't

- Centre headlines or balance pages symmetrically.
- Introduce rounded corners, soft shadows, or glass effects.
- Use a second accent colour or an illustrative gradient.
- Wrap regions in heavy boxes that destroy the open grid.
- Make controls look tactile; they are engineered and flat.

## Imagery Direction

### Summary

Spare, diagrammatic, objective. Photography is a crop field, not a scene: transit information panels, ordered city plans, objective still lifes — each on warm paper, each holding a single red mark. Text and image never contest the same ground; copy sits on its own ink panel or in open space.

### Pairs With

kursbuch

### Techniques

- objective modernist graphic photography
- diagrammatic crop fields
- matte print texture
- hairline-rule overlays on a warm paper ground

---
version: "alpha"
name: "Kursbuch"
description: "Agent-curated design language exported from Katagami as DESIGN.md."
colors:
  bg: "#ECE9E1"
  surface: "#FCFBF7"
  surface_solid: "#FCFBF7"
  text: "#121212"
  muted: "#6F6A63"
  border: "#121212"
  accent: "#D62828"
  accent_2: "#B00020"
  accent_soft: "#F2DEDA"
  on_accent: "#FCFBF7"
  success: "#1D6B3C"
  warning: "#B26A00"
  error: "#B00020"
  info: "#005F8C"
typography:
  headline-lg:
    fontFamily: "Archivo, Helvetica Neue, Arial, sans-serif"
    fontSize: "2.075rem"
    fontWeight: 700
    lineHeight: 1.1
    letterSpacing: "-0.02em"
  headline-md:
    fontFamily: "Archivo, Helvetica Neue, Arial, sans-serif"
    fontSize: "1.66rem"
    fontWeight: 600
    lineHeight: 1.15
    letterSpacing: "-0.02em"
  body-md:
    fontFamily: "IBM Plex Sans, Arial, sans-serif"
    fontSize: "17px"
    fontWeight: 400
    lineHeight: 1.5
    letterSpacing: "-0.02em"
  label-md:
    fontFamily: "IBM Plex Mono, ui-monospace, monospace"
    fontSize: "0.75rem"
    fontWeight: 600
    lineHeight: 1
    letterSpacing: "0.08em"
rounded:
  none: "0px"
  md: "16px"
  lg: "24px"
  full: "9999px"
spacing:
  base: "8px"
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: "#ffffff"
    typography: "{typography.label-md}"
    rounded: "{rounded.md}"
    padding: "{spacing.base}"
  card-surface:
    backgroundColor: "{colors.surface}"
    textColor: "{colors.text}"
    rounded: "{rounded.md}"
    padding: "{spacing.base}"
  input-default:
    backgroundColor: "{colors.surface}"
    textColor: "{colors.text}"
    rounded: "{rounded.md}"
    height: "44px"
---

# Kursbuch

## Overview

Kursbuch translates modernist clarity into an interface standard for operational surfaces — timetables, control rooms, transit information. Hierarchy comes from scale, weight, and position; structure from a strict grid and hairline rules; emphasis from type before any colour is spent. One signal red marks position and delay.

### Values

- grid discipline over improvisation
- objective communication over stylistic flourish
- flush-left typographic hierarchy with measured rhythm
- contrast through scale, weight, and placement rather than ornament
- modular systems reproducible across signage, print, and interface

### Anti-Values

- skeuomorphic texture
- centred ornamental composition
- rounded friendly softness
- decorative drop shadows and gratuitous gradients
- ambiguous hierarchy or inconsistent alignment

### Visual Character

- strict asymmetric grid with an oversized left rail for section indices and metadata
- hairline ink rules separating modules, rows, and headings with no decorative framing
- large neo-grotesk headlines flush-left with tight leading and generous surrounding space
- small uppercase utility labels tracked wide and aligned to a common baseline grid
- a limited paper-ink palette punctuated by one urgent signal red as bars, dots, and action accents

## 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 | `#ECE9E1` |
| surface | `#FCFBF7` |
| surface_solid | `#FCFBF7` |
| text | `#121212` |
| muted | `#6F6A63` |
| border | `#121212` |
| accent | `#D62828` |
| accent_2 | `#B00020` |
| accent_soft | `#F2DEDA` |
| on_accent | `#FCFBF7` |
| success | `#1D6B3C` |
| warning | `#B26A00` |
| error | `#B00020` |
| info | `#005F8C` |

## 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`

### Grid

Desktop section head is a 120px index rail plus a flexible content column; content blocks span controlled widths and align flush-left. Tablet (~768–1024) keeps the rail but tightens it into its own considered layout. Mobile collapses so the red bar and index sit inline above their block.

### Breakpoints

At ~1024px tighten outer margins and reduce column spans. At ~768px stack the hero and operational panels vertically while preserving rule-based separators and the tablet rail. At ~480px convert multi-column rows to a single column, make actions full-width, and allow tables to scroll horizontally inside ruled wrappers.

### Whitespace

Whitespace is structural: large outer margins, 48–64px between sections, an 8px internal baseline grid. Negative space frames typography like poster composition rather than filling gaps evenly.

## Elevation & Depth

### Shadows

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

## Shapes

### Rounded

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

### Surfaces

- **Treatment**: paper
- **Card Style**: hairline-ruled planes separated by open space, no elevation
- **Bg Pattern**: grid

### Borders

- **Default Width**: 1px
- **Accent Width**: 6px
- **Style**: solid
- **Character**: hairline ink dividers; the accent bar is a thick vertical signal at the left grid edge

## Components

### Composition

Build on a disciplined modular grid with a persistent left index rail. Every section opens with a narrow red signal bar and an oversized index number anchored to the left grid edge. Major zones are separated by open space and hairline rules, never nested boxes.

### Hierarchy

Hierarchy comes from scale jumps, weight changes, red signal markers, and grid position. Headlines are oversized Archivo, flush-left, tight leading; supporting data is compact, uppercase, and mono tabular.

### Density

Medium information density with high legibility: generous structural margins, compressed leading in headlines, and tightly ruled tables. Whitespace is architectural, never padding inflation inside controls.

### Signature Patterns

- every major section begins with a narrow red vertical bar and an oversized index number anchored to the left grid edge
- module boundaries are drawn with 1px horizontal hairline rules instead of rounded cards or shadows
- section index numbers live in an oversized detached left rail
- all utility labels are uppercase mono with wide letter-spacing on a common baseline grid
- tables, forms, and tabs use monochrome fields with hairline underlines or perimeter rules rather than filled controls
- the departure board component spends red only on delay; everything on time stays monochrome

## 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-019f706f-f170-7d73-a198-20cdccfd54b7/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 Spend red as a positional and delay signal, not as decorative fill.
- Do Keep major text flush-left; let the rag create rhythm.
- Do Separate information blocks with rules and space instead of extra containers.
- Do Use tabular mono for schedules, codes, and numeric summaries.
- Do Let typography carry emphasis before reaching for colour or iconography.
- Don't Centre headlines or balance pages symmetrically.
- Don't Introduce rounded corners, soft shadows, or glass effects.
- Don't Use a second accent colour or an illustrative gradient.
- Don't Wrap regions in heavy boxes that destroy the open grid.
- Don't Make controls look tactile; they are engineered and flat.

## Imagery Direction

### Summary

Spare, diagrammatic, objective. Photography is a crop field, not a scene: transit information panels, ordered city plans, objective still lifes — each on warm paper, each holding a single red mark. Text and image never contest the same ground; copy sits on its own ink panel or in open space.

### Pairs With

kursbuch

### Techniques

- objective modernist graphic photography
- diagrammatic crop fields
- matte print texture
- hairline-rule overlays on a warm paper ground

```json
{
  "$schema": "https://ui.shadcn.com/schema/registry-item.json",
  "name": "kursbuch",
  "type": "registry:theme",
  "title": "Kursbuch shadcn Theme",
  "cssVars": {
    "theme": {},
    "light": {
      "background": "#ECE9E1",
      "foreground": "#121212",
      "card": "#FCFBF7",
      "card-foreground": "#121212",
      "popover": "#FCFBF7",
      "popover-foreground": "#121212",
      "primary": "#121212",
      "primary-foreground": "#ffffff",
      "secondary": "#f4f4f5",
      "secondary-foreground": "#111111",
      "muted": "#6F6A63",
      "muted-foreground": "#121212",
      "accent": "#D62828",
      "accent-foreground": "#ffffff",
      "destructive": "#B00020",
      "border": "#121212",
      "input": "#121212",
      "ring": "#D62828",
      "chart-1": "#121212",
      "chart-2": "#f4f4f5",
      "chart-3": "#D62828",
      "chart-4": "#1D6B3C",
      "chart-5": "#B26A00",
      "sidebar": "#FCFBF7",
      "sidebar-foreground": "#121212",
      "sidebar-primary": "#121212",
      "sidebar-primary-foreground": "#ffffff",
      "sidebar-accent": "#005F8C",
      "sidebar-accent-foreground": "#ffffff",
      "sidebar-border": "#121212",
      "sidebar-ring": "#D62828",
      "radius": "16px"
    },
    "dark": {
      "background": "#0f1115",
      "foreground": "#f8fafc",
      "card": "#181b22",
      "card-foreground": "#f8fafc",
      "popover": "#181b22",
      "popover-foreground": "#f8fafc",
      "primary": "#121212",
      "primary-foreground": "#ffffff",
      "secondary": "#252a33",
      "secondary-foreground": "#f8fafc",
      "muted": "#252a33",
      "muted-foreground": "#a1a1aa",
      "accent": "#D62828",
      "accent-foreground": "#ffffff",
      "destructive": "#B00020",
      "border": "#303642",
      "input": "#303642",
      "ring": "#D62828",
      "chart-1": "#121212",
      "chart-2": "#f4f4f5",
      "chart-3": "#D62828",
      "chart-4": "#1D6B3C",
      "chart-5": "#B26A00",
      "sidebar": "#181b22",
      "sidebar-foreground": "#f8fafc",
      "sidebar-primary": "#121212",
      "sidebar-primary-foreground": "#ffffff",
      "sidebar-accent": "#D62828",
      "sidebar-accent-foreground": "#ffffff",
      "sidebar-border": "#303642",
      "sidebar-ring": "#D62828",
      "radius": "16px"
    }
  },
  "meta": {
    "source": "katagami",
    "languageId": "en-019f706f-f170-7d73-a198-20cdccfd54b7",
    "slug": "kursbuch",
    "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"
      ]
    }
  }
}
```