# Visual System

Style name: Bauhaus Geometry System

## Core DNA

- Warm off-white paper ground with a faint tooth, composed on a strict rectilinear grid.
- Pure primary geometry only: quarter circles bleeding off corners, solid squares, half-discs, right triangles, hairline circles and plus-sign crosshairs.
- Square fields of evenly spaced black dots used as the sole texture.
- Enormous ultra-bold flat-black Japanese gothic headline with the final phrase in primary red, hard against the left margin.
- A single thin black edge-to-edge rule terminated by small mustard and cobalt squares, carrying the subline between a red square and a cobalt circle.
- One dominant construction diagram of three equal bays framed by thin black hairlines and split by vertical black rules.
- Solid red, cobalt or mustard corner squares with knocked-out white numerals opening each bay.
- Flat geometric vector illustration with thick black outlines and flat primary fills, no shading and no gradients.
- Heavy solid black wedge arrows stepping between bays; large flat colour shapes as structural counterweights.
- Exactly three full-width solid colour label bars closing the bays, with knocked-out white or flat black type.
- One wide off-white bottom band bordered by a thin black keyline, with a black square holding a red disc and a mustard triangle at one end and fine black stripe rules at the other.

## Intended Use

原則、フレームワーク、硬派な講義に使う。基本図形と赤・黒・黄の構成で、抽象的な仕組みを装飾に逃げずに強く見せる。

## Page Architecture

- One oversized headline.
- One subline banner.
- One dominant diagram occupying most of the body.
- Exactly three labels.
- One takeaway band.
- Three to six supporting icons that explain the diagram.

## Composition Grammar

- Cover: title composition with corner quarter circles, three hairline-framed numbered bays and a thin-keylined bottom band with a black square emblem.
- Problem: black axis line interrupted three times by heavy solid blocking shapes.
- Before-after: irregular gray stack facing two rhythmic primary bands across a thick vertical rule.
- Three-step: three hairline-framed bays with corner number squares and black wedge arrows.
- Loop: black hairline circle cut into three colour arcs by wedge arrowheads around a crosshair.
- Checklist: tall rectangle of three stacked registers with oversized black checkboxes.
- Roadmap: staircase of three flat terraces rising to a black hairline summit circle.
- Matrix: four-quadrant square with one flooded primary-red priority panel.
- Case: three-cell register of day scenes built only from primary geometric shapes.
- Recap: keylined rectangle holding three stacked colour strips between a quarter circle and a triangle.
