# UI Components Capability - Delta Specification

## ADDED Requirements

### Requirement: Launch UI Component Library
The application SHALL integrate the Launch UI component library, providing pre-built, conversion-optimized components built on shadcn/ui and Tailwind CSS.

#### Scenario: Navbar component integration
- **WHEN** the Navbar component is rendered
- **THEN** it SHALL display navigation links (Home, Login, Register, Dashboard)
- **AND** it SHALL be responsive with mobile menu toggle
- **AND** it SHALL support authenticated/unauthenticated state variations

#### Scenario: Hero component on landing page
- **WHEN** the landing page is loaded
- **THEN** the Hero component SHALL display the main value proposition
- **AND** it SHALL include primary CTA button (e.g., "Get Started")
- **AND** it SHALL support background gradients and imagery

#### Scenario: FAQ component for common questions
- **WHEN** the FAQ component is displayed
- **THEN** it SHALL render accordion-style question/answer pairs
- **AND** clicking a question SHALL expand the answer
- **AND** multiple questions can be expanded simultaneously

#### Scenario: Footer component global placement
- **WHEN** any page is rendered
- **THEN** the Footer component SHALL appear at the bottom
- **AND** it SHALL include copyright, links, and social media icons
- **AND** it SHALL be styled consistently with the Navbar

### Requirement: shadcn/ui Primitive Components
The application SHALL use shadcn/ui primitive components (Button, Input, Card, Dialog, etc.) for all interactive UI elements, ensuring consistency and accessibility.

#### Scenario: Button component variants
- **WHEN** a button is rendered
- **THEN** it SHALL support variants: default, destructive, outline, secondary, ghost, link
- **AND** it SHALL support size props: default, sm, lg, icon
- **AND** it SHALL be keyboard accessible and focusable

#### Scenario: Input component with validation states
- **WHEN** an input field is rendered in a form
- **THEN** it SHALL support validation states: default, error, success
- **AND** it SHALL display error messages when validation fails
- **AND** it SHALL be accessible with proper ARIA labels

#### Scenario: Card component for content grouping
- **WHEN** content needs visual grouping (e.g., portfolio cards)
- **THEN** the Card component SHALL be used with Header, Content, and Footer sections
- **AND** it SHALL support hover effects and shadows
- **AND** it SHALL be responsive to viewport changes

### Requirement: Lucide Icons Integration
The application SHALL use Lucide React icons for all iconography, ensuring consistent visual language and accessibility.

#### Scenario: Icon usage in buttons
- **WHEN** a button requires an icon
- **THEN** a Lucide icon component SHALL be imported and rendered
- **AND** the icon SHALL scale appropriately with button size
- **AND** it SHALL support aria-hidden for decorative icons

#### Scenario: Status indicators with icons
- **WHEN** displaying portfolio status (e.g., uploaded, pending)
- **THEN** status-appropriate Lucide icons SHALL be shown
- **AND** icons SHALL be color-coded to match status meaning
- **AND** tooltips or labels SHALL provide context

### Requirement: Component Accessibility (WCAG 2.1 AA)
All UI components SHALL meet WCAG 2.1 Level AA accessibility standards, including keyboard navigation, screen reader support, and sufficient color contrast.

#### Scenario: Keyboard navigation for interactive elements
- **WHEN** a user navigates using only the keyboard
- **THEN** all interactive components SHALL be focusable in logical order
- **AND** focus indicators SHALL be visible
- **AND** Enter/Space keys SHALL activate buttons and links

#### Scenario: Screen reader compatibility
- **WHEN** a screen reader user accesses the application
- **THEN** all components SHALL have appropriate ARIA labels and roles
- **AND** form inputs SHALL be associated with labels
- **AND** dynamic content changes SHALL be announced

#### Scenario: Color contrast compliance
- **WHEN** components are rendered
- **THEN** text SHALL have a minimum contrast ratio of 4.5:1 against backgrounds
- **AND** interactive elements SHALL have 3:1 contrast for non-text elements
- **AND** color SHALL not be the sole indicator of state or meaning

### Requirement: Dark Mode Support (Future Enhancement)
The application SHALL provide infrastructure for dark mode theming using shadcn/ui's theme system, enabling future implementation of light and dark color scheme toggling.

*(Future enhancement - infrastructure SHALL be present, but full implementation is deferred)*

#### Scenario: Theme toggle in Navbar
- **WHEN** a user clicks the theme toggle button
- **THEN** the application SHALL switch between light and dark mode
- **AND** the preference SHALL be persisted in localStorage
- **AND** all Launch UI components SHALL adapt to the selected theme

#### Scenario: System preference detection
- **WHEN** a user first visits the application
- **THEN** the theme SHALL default to the user's system preference (prefers-color-scheme)
- **AND** the theme can be manually overridden by the user

## MODIFIED Requirements

*No existing requirements to modify (new capability)*

## REMOVED Requirements

*No requirements to remove (new capability)*
