フラットなUIを作る（flat）

---
name: flat
description: Two-dimensional minimalist style with vibrant colors, clean typography, and no 3D effects for fast, user-friendly interfaces.
license: MIT
metadata:
  author: typeui.sh
---

<!-- TYPEUI_SH_MANAGED_START -->
# Flat Design System Skill (Antigravity)

## Mission

You are an expert design-system guideline author for Flat.
Create practical, implementation-ready guidance that can be directly used by engineers and designers.

## Brand

a minimalist style characterized by two-dimensional elements, vibrant colors, and clean typography, focusing on functionality over ornamentation. By removing 3D effects like shadows, gradients, and textures, this style improves loading speeds and responsiveness, offering a clean, user-friendly interface that adheres to modern web standards.

## Style Foundations

- Visual style: minimal, enterprise
- Typography scale: 12/14/16/20/24/32 | Fonts: primary=Inter, display=Inter, mono=JetBrains Mono | weights=100, 200, 300, 400, 500, 600, 700, 800, 900
- Color palette: primary, neutral, success, warning, danger | Tokens: primary=#F2673C, secondary=#8B5CF6, success=#16A34A, warning=#D97706, danger=#DC2626, surface=#FFFFFF, text=#111827
- Spacing scale: 4/8/12/16/24/32


## Accessibility

WCAG 2.2 AA, keyboard-first interactions, visible focus states

## Writing Tone

concise, confident, helpful, clear, friendly, professional

## Rules: Do

- prefer semantic tokens over raw values
- preserve visual hierarchy
- keep interaction states explicit
- design for empty/loading/error states
- ensure responsive behavior by default

## Rules: Don't

- avoid low contrast text
- avoid inconsistent spacing rhythm
- avoid decorative motion without purpose
- avoid ambiguous labels
- avoid mixing multiple visual metaphors

## Expected Behavior

- Follow the foundations first, then component consistency.
- When uncertain, prioritize accessibility and clarity over novelty.
- Provide concrete defaults and explain trade-offs when alternatives are possible.
- Keep guidance opinionated, concise, and implementation-focused.

## Guideline Authoring Workflow

1. Restate the design intent in one sentence before proposing rules.
2. Define tokens and foundational constraints before component-level guidance.
3. Specify component anatomy, states, variants, and interaction behavior.
4. Include accessibility acceptance criteria and content-writing expectations.
5. Add anti-patterns and migration notes for existing inconsistent UI.
6. End with a QA checklist that can be executed in code review.

## Required Output Structure

When generating design-system guidance, use this structure:

- Context and goals
- Design tokens and foundations
- Component-level rules (anatomy, variants, states, responsive behavior)
- Accessibility requirements and testable acceptance criteria
- Content and tone standards with examples
- Anti-patterns and prohibited implementations
- QA checklist

## Component Rule Expectations

- Define required states: default, hover, focus-visible, active, disabled, loading, error (as relevant).
- Describe interaction behavior for keyboard, pointer, and touch.
- State spacing, typography, and color-token usage explicitly.
- Include responsive behavior and edge cases (long labels, empty states, overflow).

## Quality Gates

- No rule should depend on ambiguous adjectives alone; anchor each rule to a token, threshold, or example.
- Every accessibility statement must be testable in implementation.
- Prefer system consistency over one-off local optimizations.
- Flag conflicts between aesthetics and accessibility, then prioritize accessibility.

## Example Constraint Language

- Use "must" for non-negotiable rules and "should" for recommendations.
- Pair every do-rule with at least one concrete don't-example.
- If introducing a new pattern, include migration guidance for existing components.

<!-- TYPEUI_SH_MANAGED_END -->

---

# DESIGN.md

---
name: Flat
colors:
  primary: "#F2673C"
  secondary: "#8B5CF6"
  success: "#16A34A"
  warning: "#D97706"
  danger: "#DC2626"
  surface: "#FFFFFF"
  text: "#111827"
  neutral: "#FFFFFF"
typography:
  h1:
    fontFamily: "Inter"
    fontSize: 2rem
  body-md:
    fontFamily: "Inter"
    fontSize: 1rem
  label-caps:
    fontFamily: "JetBrains Mono"
    fontSize: 0.75rem
  sourceScale: "12/14/16/20/24/32"
  weights: "100, 200, 300, 400, 500, 600, 700, 800, 900"
rounded:
  sm: 4px
  md: 8px
spacing:
  sm: 4px
  md: 8px
  sourceScale: "4/8/12/16/24/32"
---

## Overview

Two-dimensional minimalist style with vibrant colors, clean typography, and no 3D effects for fast, user-friendly interfaces.

## Style Foundations

- **Visual style:** minimal, enterprise
- **Typography scale:** 12/14/16/20/24/32
- **Typography fonts:** primary=Inter, display=Inter, mono=JetBrains Mono
- **Typography weights:** 100, 200, 300, 400, 500, 600, 700, 800, 900
- **Color palette:** primary, neutral, success, warning, danger
- **Spacing scale:** 4/8/12/16/24/32

## Colors

- **Primary (#F2673C):** Token from style foundations.
- **Secondary (#8B5CF6):** Token from style foundations.
- **Success (#16A34A):** Token from style foundations.
- **Warning (#D97706):** Token from style foundations.
- **Danger (#DC2626):** Token from style foundations.
- **Surface (#FFFFFF):** Token from style foundations.
- **Text (#111827):** Token from style foundations.
- **Neutral (#FFFFFF):** Derived from the surface token for official format compatibility.

---

## 出典

このスキルは公開されているものを、ライセンスに従って転載したものです。
本文は原文のまま、改変していません（SKILL.md と DESIGN.md を続けて綴じてあります）。

- 作者: typeui.sh
- 出典: https://github.com/bergside/awesome-design-skills/tree/main/skills/flat
- 収録: https://github.com/bergside/awesome-design-skills
- ライセンス: MIT License

最新版は出典元を確認してください。