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archy/.cursor/rules/12-accessibility.mdc
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Dorian c28e6dd811 feat: initialize AIUI monorepo with project rules and core types
Foundation for the next-generation AI content surface UI:
- 16 Cursor rules files covering philosophy, Vue conventions, design system,
  content surfaces, plugin system, AI integration, renderers, security,
  Bitcoin-only policy, dev/prod modes, accessibility, performance, animation,
  mobile UX, and git workflow
- pnpm workspaces + Turborepo monorepo (@aiui/core, @aiui/app)
- Vue 3 + Vite + TypeScript + Tailwind CSS 4
- Core type system: plugins, renderers, messages, content blocks
- Plugin registry with renderer registration
- 50 mock film fixtures with search/filter utilities
- App shell with chat page layout
- Environment config templates

Made-with: Cursor
2026-03-02 14:15:39 +00:00

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---
description: Accessibility standards - WCAG AA, keyboard navigation, screen readers
globs: "**/*.vue"
alwaysApply: false
---
# Accessibility
## Standard
WCAG AA compliance minimum. Target AAA where feasible.
## Color Contrast
- Normal text: 4.5:1 minimum ratio
- Large text (18px+ or 14px+ bold): 3:1 minimum
- Interactive elements: 3:1 against adjacent colors
- Test with browser DevTools accessibility panel
## Keyboard Navigation
- All interactive elements focusable via Tab
- Visible focus indicators on every focusable element (`focus:ring-2`)
- Escape closes modals, drawers, dropdowns
- Arrow keys navigate within lists, grids, tabs
- Enter/Space activates buttons and controls
- Focus trap inside modals (Tab cycles within modal)
## Semantic HTML
```html
<header>, <nav>, <main>, <article>, <aside>, <footer>
```
Never `<div class="header">`. Use semantic elements.
## ARIA
- Icon-only buttons: `aria-label="Close modal"`
- Dynamic content: `aria-live="polite"` for updates
- Screen reader only text: `class="sr-only"`
- Expandable sections: `aria-expanded="true/false"`
- Form fields: `aria-describedby` for help text, `aria-invalid` for errors
## Images
- All `<img>` tags need `alt` text
- Decorative images: `alt=""`
- Complex images: `aria-describedby` pointing to description
## Media
- Audio/video players: keyboard-accessible controls
- Provide transcripts/captions when available
- Respect `prefers-reduced-motion` for animations
## Touch Targets
- Minimum: 44x44px (Apple HIG)
- Recommended: 48x48px (Material Design)
- Minimum 8px gap between adjacent targets
## Reduced Motion
```css
@media (prefers-reduced-motion: reduce) {
* {
animation-duration: 0.01ms !important;
transition-duration: 0.01ms !important;
}
}
```
Check in JS: `window.matchMedia('(prefers-reduced-motion: reduce)').matches`
## Testing
- VoiceOver (macOS), TalkBack (Android), NVDA (Windows)
- Keyboard-only navigation test
- axe DevTools or Lighthouse accessibility audit
- High contrast mode test