# UI Components Capability Specification

## MODIFIED Requirements

### Requirement: Launch UI Component Integration
The system SHALL integrate the Launch UI component library, providing pre-built, conversion-optimized components built on shadcn/ui and Tailwind CSS with responsive design for all viewports.

#### Scenario: Navbar component responsive mobile menu
- **WHEN** user accesses site on mobile (<768px)
- **THEN** Navbar displays hamburger menu icon
- **AND** menu opens/closes on icon click
- **AND** navigation links are displayed in vertical stack
- **AND** menu closes when link is clicked

#### Scenario: Hero component with Launch UI styling
- **WHEN** landing page loads
- **THEN** Hero component displays with value proposition
- **AND** Hero includes primary CTA button ("Get Started")
- **AND** Hero has background gradient and optional imagery
- **AND** on mobile, Hero content stacks vertically

#### Scenario: FAQ component accordion interaction
- **WHEN** user views FAQ section
- **THEN** FAQ questions display as expandable accordion items
- **AND** clicking question expands answer
- **AND** multiple questions can be expanded simultaneously
- **AND** on mobile, questions are readable without horizontal scroll

#### Scenario: Stats component with animations
- **WHEN** stats section is viewed
- **THEN** statistics numbers animate from 0 to final value
- **AND** stats display in 2-3 columns on desktop, 1 column on mobile
- **AND** component is responsive and scales appropriately

#### Scenario: CTA component call-to-action
- **WHEN** CTA component is rendered
- **THEN** it displays headline, description, and action button
- **AND** button links to signup or login
- **AND** component layout adapts to mobile and desktop

#### Scenario: Footer component consistent styling
- **WHEN** any page is rendered
- **THEN** Footer appears at bottom of page
- **AND** Footer includes copyright, links, and social media icons
- **AND** Footer styling is consistent with Navbar
- **AND** Footer links navigate correctly

## ADDED Requirements

### Requirement: Mobile-Optimized Launch UI Components
The system SHALL ensure all Launch UI components render correctly and are usable on mobile devices with 375px minimum width.

#### Scenario: Touch target sizing compliance
- **WHEN** interactive elements (buttons, links) are rendered
- **THEN** touch targets are minimum 44x44 pixels
- **AND** spacing between elements is ≥8px
- **AND** elements are easily tappable on mobile

#### Scenario: Mobile text legibility
- **WHEN** page is viewed on mobile
- **THEN** text is readable without pinch-to-zoom
- **AND** minimum font size is 16px for body text
- **AND** line height is ≥1.5 for readability

### Requirement: Accessibility for Launch UI Components
The system SHALL ensure all Launch UI components meet WCAG 2.1 Level AA standards for accessibility.

#### Scenario: Keyboard navigation through components
- **WHEN** user navigates with Tab key
- **THEN** all interactive elements in Launch UI are reachable
- **AND** focus order is logical (left-to-right, top-to-bottom)
- **AND** Escape key closes modals/menus where applicable

#### Scenario: ARIA labels for interactive elements
- **WHEN** assistive technology accesses components
- **THEN** buttons have accessible labels or aria-label
- **AND** form inputs have associated labels
- **AND** dynamic content updates are announced

#### Scenario: Color contrast in Launch UI components
- **WHEN** components are rendered
- **THEN** text has 4.5:1 minimum contrast ratio
- **AND** interactive elements have 3:1 contrast ratio
- **AND** color is not the sole indicator of state or meaning

### Requirement: Dark Mode Infrastructure
The system SHALL provide infrastructure for dark mode theming using shadcn/ui's theme system, supporting future implementation of light/dark toggling.

#### Scenario: Dark mode CSS variables defined
- **WHEN** application initializes
- **THEN** CSS variables for light and dark themes are available
- **AND** components can reference theme variables
- **AND** theme switching is technically possible

#### Scenario: System preference detection
- **WHEN** user first visits application
- **THEN** theme defaults to system preference (prefers-color-scheme)
- **AND** preference is detected and applied automatically
- **AND** user can manually override preference (future feature)