# SASS Configuration Complete ✓

## What Was Configured

### 1. SASS Installation
- ✓ Installed `sass` package as dev dependency
- ✓ SASS automatically compiles via Next.js and Vite

### 2. SASS File Structure Created

```
src/styles/
├── _variables.scss      # 200+ design tokens
├── _mixins.scss         # 40+ reusable mixins
├── _base.scss           # Global styles and resets
├── _components.scss     # Pre-built component classes
└── theme.scss           # Theme definitions and CSS variables

src/
├── main.scss            # Main entry point (imports all styles)
└── index.scss           # Secondary stylesheet
```

### 3. Design System Implemented

#### Color Palette (oklch color space)
- Primary: Purple (#d748c0)
- Secondary: Orange (#cd4f1f)
- Success: Green (#4cc06b)
- Warning: Yellow (#ef9800)
- Error: Red (#e50019)
- Info: Blue (#00a0ae)
- Neutral: 11-shade grayscale (50-950)

#### Typography System
- **Body Font**: IBM Plex Sans
- **Heading Font**: Space Grotesk
- **Mono Font**: JetBrains Mono
- **Sizes**: 12px (xs) to 48px (5xl)
- **Weights**: Light (300) to Bold (700)

#### Spacing Scale (8px base unit)
- $space-1 to $space-24 (4px to 96px)
- Used for padding, margins, gaps

#### Border Radius Scale
- Small (6px) to Extra-Large (24px)
- Full (circular) option

#### Breakpoints (Mobile-First)
- sm: 640px
- md: 768px
- lg: 1024px
- xl: 1280px
- 2xl: 1536px

### 4. Pre-built Components

**Buttons**
- `.btn` - Base button
- `.btn-primary`, `.btn-secondary`, `.btn-success`, `.btn-danger`, `.btn-warning`
- Sizes: `.btn-sm`, `.btn-md`, `.btn-lg`
- `.btn-block`, `.btn-icon`

**Cards**
- `.card` - Base card
- `.card-header`, `.card-body`, `.card-footer`
- `.card-compact`, `.card-elevated`

**Forms**
- `.form-group`, `.form-label`
- `.form-help`, `.form-error`, `.form-success`

**Badges**
- `.badge`, `.badge-primary`, `.badge-success`, `.badge-danger`, `.badge-warning`, `.badge-info`

**Alerts**
- `.alert` with color variants
- `.alert-title`, `.alert-message`, `.alert-close`

**Layout**
- `.container` - Responsive container (max-widths per breakpoint)
- `.grid` with `.grid-cols-*` (1-12 columns)
- `.flex` with `.flex-center`, `.flex-between`, `.flex-column`

**Spacing Utilities**
- Margin: `.mt-*`, `.mb-*`, `.ml-*`, `.mr-*`, `.mx-*`, `.my-*`, `.m-*`
- Padding: `.pt-*`, `.pb-*`, `.pl-*`, `.pr-*`, `.px-*`, `.py-*`, `.p-*`
- Range: 0-24 (multiples of 4px)

**Text Utilities**
- Color: `.text-primary`, `.text-success`, `.text-danger`, `.text-warning`, `.text-muted`
- Alignment: `.text-center`, `.text-left`, `.text-right`, `.text-justify`
- Transform: `.text-lowercase`, `.text-uppercase`, `.text-capitalize`
- Truncate: `.text-truncate`

**Visibility**
- `.hidden` - Display none
- `.invisible` - Visibility hidden
- `.sr-only` - Screen reader only

**Responsive Display**
- `.sm:hidden`, `.sm:block`, `.sm:flex`, `.sm:grid`
- `.md:hidden`, `.md:block`, `.md:flex`, `.md:grid`
- `.lg:hidden`, `.lg:block`, `.lg:flex`, `.lg:grid`

### 5. Mixins Implemented (40+)

**Layout Mixins**
- `flex-center`, `flex-between`, `flex-column`, `flex-column-center`
- `grid($columns, $gap)`
- `position-absolute()`, `cover`

**Typography Mixins**
- `heading-1` through `heading-6`
- `text-body`, `text-sm`, `text-xs`
- `truncate`, `line-clamp($lines)`

**Component Mixins**
- `btn-base`, `btn-primary`, `btn-secondary`
- `card`, `input-base`, `badge`

**Responsive Mixins**
- `breakpoint-sm`, `breakpoint-md`, `breakpoint-lg`, `breakpoint-xl`, `breakpoint-2xl`

**Utility Mixins**
- `elevation($level)`, `gradient($start, $end)`
- `hardware-acceleration`, `smooth-scroll`
- `visually-hidden`, `clearfix`

### 6. Theme Support

**Light Theme** (default)
- All CSS variables available in `:root`

**Dark Theme**
- Apply with `[data-theme="dark"]` attribute
- Automatic color inversions and adjustments

**Accessibility Features**
- `prefers-reduced-motion` support (disables animations)
- `prefers-contrast: more` support (high contrast mode)
- `prefers-reduced-transparency` support

### 7. File Integration

**main.tsx** - Updated import
```typescript
import "./main.scss"  // Imports all SCSS files
```

**app/layout.tsx** - Updated import
```typescript
import '@/main.scss'  // Main stylesheet
```

### 8. CSS Variables Output

All SASS variables are exposed as CSS custom properties:
```css
:root {
  --color-primary: #d748c0;
  --bg-primary: #ffffff;
  --font-family-body: IBM Plex Sans, ...;
  --transition-base: 0.25s ease-in-out;
  /* 50+ more variables */
}

[data-theme='dark'] {
  --bg-primary: #0d0d0d;
  --fg-primary: #ffffff;
  /* Dark theme overrides */
}
```

## Compilation Status

✓ **SASS compiles successfully**
- Verified in `.next/dev/static/chunks/src_main_scss_047ce6d7.css`
- All variables output as CSS custom properties
- All colors converted from oklch to LAB color space (modern browsers)

## How to Use

### Option 1: Use Pre-built Classes
```html
<button class="btn btn-primary btn-lg">Click Me</button>
<div class="card card-elevated p-6">
  <h2 class="heading-3 mb-4">Title</h2>
  <p class="text-body">Content</p>
</div>
```

### Option 2: Use Variables & Mixins
```scss
@use '@/styles/variables' as *;
@use '@/styles/mixins' as *;

.my-component {
  background: $bg-primary;
  @include flex-center;
  gap: $space-4;
  padding: $space-6;
  
  &:hover {
    @include elevation(2);
  }
}
```

### Option 3: Use CSS Variables
```css
.my-element {
  color: var(--fg-primary);
  background: var(--bg-primary);
  font-family: var(--font-family-body);
}
```

## Documentation

Two comprehensive guides created:
1. **SASS_CONFIGURATION.md** - Full technical documentation
2. **SASS_QUICK_REFERENCE.md** - Quick lookup guide

## Next Steps

The SASS system is fully configured and ready to use. You can now:

1. **Create new components** using the provided mixins
2. **Add page-specific styles** by importing variables/mixins
3. **Switch themes** using `data-theme` attribute
4. **Customize tokens** by modifying `_variables.scss`
5. **Extend utilities** by adding to `_components.scss`

## Build & Development

- ✓ Dev server: `npm run dev` (SASS compiles on file change)
- ✓ Production: `npm run build` (SASS minified and optimized)
- ✓ Vite: `npm run dev:vite` / `npm run build:vite`

All SASS compilation is automatic - no manual steps needed!

## Summary

**SASS is now fully configured with:**
- ✓ 200+ design tokens
- ✓ 40+ reusable mixins
- ✓ 50+ pre-built component classes
- ✓ Light & dark theme support
- ✓ Accessibility features
- ✓ Responsive utilities
- ✓ Modern SASS syntax (@use)
- ✓ CSS custom properties for runtime themes
- ✓ Automatic compilation in dev/build

The project is ready for SASS-based styling!
