# CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

## Project Overview

This is the official website for 밍글 스튜디오 (Mingle Studio), a motion capture studio located in Incheon, South Korea. The website is a multi-page static site built with vanilla HTML, CSS, and JavaScript, showcasing motion capture services, studio galleries, and client portfolios.

**Tech Stack:** Pure HTML5, CSS3 (with CSS Variables), Vanilla JavaScript (ES6+), no framework dependencies

## Architecture & Structure

### Page Architecture
The site follows a modular component-based structure:

- **Main Pages**: `index.html`, `about.html`, `services.html`, `portfolio.html`, `gallery.html`, `contact.html`, `qna.html`, `404.html`
- **Shared Components**: `components/header.html`, `components/footer.html`
- **Page-specific Assets**: Each page has dedicated CSS (`css/[page].css`) and JavaScript (`js/[page].js`) files
- **Common Assets**: `css/common.css` and `js/common.js` provide shared functionality

### Component Loading System
The site uses a dynamic component loading system implemented in `js/common.js`:
- Header and footer are loaded via `fetch()` API from `components/` directory
- **Fallback System**: Pages should include a static backup footer in HTML that gets hidden when dynamic loading succeeds (check `backupFooter` logic in `loadComponents()`)
- Components are initialized after DOM load with proper error handling
- Loading sequence: `showPageLoading()` → `loadComponents()` → `initLazyLoading()` → `hidePageLoading()`

### CSS Architecture
- **CSS Variables**: Defined in `:root` of `common.css` with motion capture/VTuber orange theme
- **Modular Approach**: Common styles in `common.css`, page-specific styles in separate files
- **Responsive Design**: Mobile-first approach with breakpoints at 768px and 1200px
- **Color Scheme**: Primary orange (`#ff8800`) with gradient variations for modern tech aesthetic

## Development Commands

### Server Options

**Node.js (권장):**
```bash
npm run dev          # http://localhost:8000
npm start           # 같은 기능
npm run serve       # 같은 기능
npm test           # 도움말 + 서버 시작
```

**Python (Alternative):**
```bash
python server.py                # Custom server with auto-open on port 8001
python -m http.server 8000      # Basic Python server on port 8000
```

**Note:** The custom Python server (`server.py`) uses port 8001 and includes automatic port detection, browser opening, and clean URL support (`.html` extension optional).

### Development Features
- **Auto Browser Opening**: Python server automatically opens http://localhost:8001 (or available port)
- **Clean URLs**: `.html` extension optional for access (e.g., `/about` works as `/about.html`)
- **Dev Optimizations**: Cache disabled, CORS headers added
- **Port Auto-Detection**: Python server finds available ports from 8001-8020 if default is occupied
- **Error Handling**: Port conflicts and basic error scenarios handled gracefully

### Available URLs
When using npm scripts (port 8000):
- Homepage: http://localhost:8000/
- About: http://localhost:8000/about
- Services: http://localhost:8000/services
- Portfolio: http://localhost:8000/portfolio
- Gallery: http://localhost:8000/gallery
- Contact: http://localhost:8000/contact
- Q&A: http://localhost:8000/qna

When using `python server.py` (port 8001 or auto-detected):
- The server will display available URLs with the detected port

## Key Technical Details

### JavaScript Module System
- **Common Utilities** (`js/common.js`): Exports functions via `window.commonUtils` object for use in page-specific scripts
  - Navigation handling with hamburger menu
  - Notification system with 4 types (success, error, warning, info)
  - Lazy loading for YouTube iframes and images using IntersectionObserver
  - Loading state management (page-level and component-level)
  - Utility functions: `debounce`, `throttle`, `isValidEmail`
- **Popup System** (`js/popup.js`): Cookie-based "don't show today" functionality for main page popups

### SEO Optimization
- Structured data (JSON-LD) with LocalBusiness schema for search engines
- Comprehensive meta tags including Open Graph, Twitter Cards, and Korean platform-specific tags
- Sitemap.xml without lastmod dates to prevent unwanted date display in search results
- Favicon system: Both ICO (`mingle-logo.ico`) and WebP (`mingle-logo.webp`) formats

### Image Management
- Studio images stored in `Studio_Image/` directory using WebP format for optimization
- Gallery system dynamically references these images with descriptive alt text
- Logo assets: `mingle-logo.webp` (primary) and `mingle-logo.ico` (favicon)

### Form Handling & Interactivity
- Contact form with real-time validation in `js/contact.js`
- Lazy loading implementation for performance optimization
- Scroll animations and intersection observers for modern UX

## Content Management

### Adding Gallery Images
1. Add new WebP images to `Studio_Image/` directory
2. Update `gallery.html` with new gallery items following the existing pattern:
   ```html
   <div class="gallery-item">
       <img src="Studio_Image/[filename].webp" alt="descriptive text" class="gallery-img" loading="lazy">
       <div class="gallery-caption">Caption Text</div>
   </div>
   ```

### Adding Portfolio Videos
- YouTube videos: Update `portfolio.html` with iframe embed using `data-src` for lazy loading
- SOOP/streaming VODs: Direct iframe source for broadcast examples

### Navigation Updates
When adding new pages, update `components/header.html` navigation links and ensure corresponding CSS/JS files follow the naming convention (`css/[page].css`, `js/[page].js`).

## Important Notes

### File Structure Conventions
- Each page has three files: `[page].html`, `css/[page].css`, `js/[page].js`
- Backup files may exist (e.g., `index_backup.html`, `index_new.html`) - these are not actively used
- All pages must include placeholders for dynamic components:
  - `<div id="header-placeholder"></div>` for header
  - `<div id="footer-placeholder"></div>` for footer
- Page-specific CSS and JS are loaded after common files for proper override capability

### Styling System
Access the orange motion capture theme via CSS variables defined in `common.css`:
```css
--primary-color: #ff8800;
--gradient-main: linear-gradient(135deg, #ff8800 0%, #ff6600 100%);
--navbar-height: 70px;
```

### Common Utilities Access
Page-specific scripts can access common functions via `window.commonUtils`:
```javascript
// Show notification
window.commonUtils.showNotification('Message', 'success');

// Validate email
window.commonUtils.isValidEmail('test@example.com');

// Use debounce/throttle
const debouncedFn = window.commonUtils.debounce(myFn, 300);
```

## Business Context

This website represents a motion capture studio business with:
- **Primary Service**: OptiTrack-based motion capture studio rental (22만원/hour)
- **Target Market**: VTubers, game developers, content creators
- **Location**: Incheon Techno Valley, unique positioning as Incheon's only motion capture facility
- **Technical Specs**: 28 OptiTrack cameras, 8×7m capture space

Understanding this context helps with content updates, SEO optimization, and feature development that aligns with the studio's business objectives.