diff --git a/CLAUDE.MD b/CLAUDE.MD
deleted file mode 100644
index 7efe163..0000000
--- a/CLAUDE.MD
+++ /dev/null
@@ -1,236 +0,0 @@
-# CLAUDE.MD - AI Assistant Guide
-
-This file provides guidance for Claude Code and other AI assistants when working with the Cozy Den project.
-
-## Project Quick Reference
-
-**Project:** Cozy Den - Personal landing page for hiddenden.cafe
-**Owner:** Latte (gay furry developer, values self-hosting and privacy)
-**Tech Stack:** Astro 4.x, TypeScript, Vanilla CSS, Docker + Nginx
-**Aesthetic:** Warm coffee/cappuccino theme, cozy hidden den vibes
-**Deployment:** Docker containers pushed to Gitea registry at git.hiddenden.cafe
-
-## Core Design Principles
-
-1. **Cozy Aesthetic** - Warm colors, coffee/cappuccino theme, hidden den vibes
-2. **Self-Hosted** - Everything runs on personal infrastructure (homelab/VPS)
-3. **Privacy First** - No tracking, no external dependencies
-4. **Lightweight** - Static HTML/CSS, minimal JavaScript
-5. **Docker-Ready** - Easy deployment via containers
-
-## File Structure
-
-```
-src/
-├── layouts/
-│   └── BaseLayout.astro      # Base HTML layout + global styles + CSS variables
-├── pages/
-│   └── index.astro            # Main landing page (all sections here)
-└── components/                # Empty - ready for future components
-public/
-└── favicon.svg                # Coffee emoji favicon
-```
-
-**Key Files:**
-- `src/layouts/BaseLayout.astro` - CSS variables, global styles, base HTML structure
-- `src/pages/index.astro` - All page content and section-specific styles
-- `astro.config.mjs` - Astro configuration
-- `Dockerfile` - Multi-stage build (Node builder + Nginx server)
-- `docker-compose.yml` - Local Docker Compose setup
-- `nginx.conf` - Production Nginx configuration
-
-## Color System
-
-All colors use CSS custom properties in `src/layouts/BaseLayout.astro`:
-
-```css
---color-bg: #1a1410           /* Dark background (deep coffee) */
---color-bg-light: #2a1f18     /* Lighter background for cards */
---color-text: #f4e9d8          /* Cream text */
---color-text-dim: #c4b5a0      /* Dimmed text */
---color-accent: #d4a574        /* Warm accent (coffee with cream) */
---color-accent-bright: #e8bf8e /* Brighter accent for highlights */
---color-warm: #8b6f47          /* Warm brown for borders/accents */
-```
-
-**To change theme:** Edit these variables. All components update automatically.
-
-## Common Modification Patterns
-
-### Adding a Section
-```astro
-<section class="section new-section">
-  <div class="container">
-    <div class="card fade-in">
-      <h2>Section Title</h2>
-      <p>Content</p>
-    </div>
-  </div>
-</section>
-```
-
-### Adding a Service
-```astro
-<div class="service-item">
-  <h3><a href="https://service.hiddenden.cafe">🔧 Service Name</a></h3>
-  <p>Description of the service</p>
-</div>
-```
-
-### Adding a New Page
-Create `src/pages/newpage.astro`:
-```astro
----
-import BaseLayout from '../layouts/BaseLayout.astro';
----
-
-<BaseLayout title="New Page">
-  <div class="container">
-    <h1>New Page</h1>
-  </div>
-</BaseLayout>
-```
-
-## Development Workflow
-
-```bash
-npm install          # Install dependencies
-npm run dev          # Start dev server (http://localhost:4321)
-npm run build        # Build for production (output to dist/)
-npm run preview      # Preview production build
-```
-
-## Docker Workflow
-
-```bash
-# Build image
-docker build -t cozy-den .
-
-# Run locally
-docker run -d -p 3000:80 --name cozy-den cozy-den
-
-# Or use Docker Compose
-docker-compose up -d
-
-# Tag for Gitea registry
-docker tag cozy-den git.hiddenden.cafe/mats/cozy-den:latest
-
-# Push to Gitea
-docker login git.hiddenden.cafe
-docker push git.hiddenden.cafe/mats/cozy-den:latest
-```
-
-## Important Implementation Guidelines
-
-### DO:
-- Maintain the cozy, warm aesthetic (coffee theme)
-- Keep the site lightweight and fast (static HTML/CSS)
-- Use CSS custom properties for all colors
-- Add `.fade-in` class for animations
-- Test both dev and production builds
-- Verify Docker build works after changes
-- Use semantic HTML with consistent `.card` class styling
-- Ensure responsive design works on mobile
-- Be warm and friendly in communication (matches site vibe)
-- Focus on practical implementation
-- Respect the furry community context
-
-### DON'T:
-- Add tracking or external dependencies
-- Make the site heavy or complex
-- Use JavaScript unless absolutely necessary (site is pure HTML/CSS)
-- Create sterile or corporate design elements
-- Add features not explicitly requested
-- Break the coffee/warm color theme
-- Ignore accessibility considerations
-
-## Astro-Specific Notes
-
-- **File Extensions:** `.astro` for components, `.mjs` for config
-- **Frontmatter:** Code between `---` runs at build time
-- **Styling:** `<style>` tags are scoped by default, use `<style is:global>` for global styles
-- **Static Generation:** Astro generates static HTML at build time
-- **No Runtime:** This site outputs pure HTML/CSS with no JavaScript runtime needed
-
-## Current Project Status
-
-**Completed:**
-- Landing page with hero section
-- About Hidden Den section
-- About Me section (Latte)
-- Services section (Gitea linked)
-- Support section
-- Docker deployment setup
-- Responsive design
-
-**Future Possibilities:**
-- Blog section using Astro Content Collections
-- More self-hosted services
-- Payment/donation links
-- Project showcase pulling from Gitea API
-- Custom 404 page
-- Theme toggle
-- Contact form
-- RSS feed
-
-## Owner Preferences
-
-Latte typically:
-- Works in bursts of creative energy
-- Uses Docker for all deployments
-- Pushes to personal Gitea at git.hiddenden.cafe
-- Values complete control over hosting
-- Prefers warm, personal styling over corporate design
-- Is learning Astro (normally uses Python/Flask)
-
-## Testing Checklist
-
-Before deploying changes:
-- [ ] `npm run dev` - Check locally
-- [ ] `npm run build` - Ensure build succeeds
-- [ ] `docker build -t cozy-den .` - Verify Docker build
-- [ ] Test on mobile viewport
-- [ ] Check all links work
-- [ ] Verify color contrast for accessibility
-
-## Success Criteria
-
-The site should:
-- Load fast (static HTML)
-- Feel warm and welcoming
-- Accurately represent Latte and Hidden Den
-- Work on all screen sizes
-- Be easy to deploy via Docker
-- Require minimal maintenance
-
-## Troubleshooting Quick Reference
-
-**Build fails:** Check TypeScript config, ensure Node 18+
-**Styles not applying:** Check if you need `is:global`, verify CSS variables are in BaseLayout
-**Docker build fails:** Ensure package.json and package-lock.json are present
-**Changes not showing:** Hard refresh (Ctrl+Shift+R), restart dev server, or clear `.astro` cache
-
-## Documentation Files
-
-- **CLAUDE.MD** (this file) - AI assistant guide
-- **PROJECT_CONTEXT.md** - Project context and design principles
-- **DEVELOPMENT.md** - Developer documentation and architecture
-- **TODO.md** - Current tasks and future features
-- **README.md** - User-facing documentation
-
-## Communication Style
-
-When working with this project:
-- Be warm and friendly (matches the site vibe)
-- Use clear, direct language
-- Respect the furry community context
-- Focus on practical implementation
-- Acknowledge this is a learning project with Astro
-- Personal and authentic over polished and corporate
-
----
-
-**Last Updated:** 2025-12-23
-**Project Version:** Initial release
-**Astro Version:** 4.x
-**Node Version:** 18+
diff --git a/CLAUDE.md b/CLAUDE.md
new file mode 100644
index 0000000..cb918fa
--- /dev/null
+++ b/CLAUDE.md
@@ -0,0 +1,169 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Quick Reference
+
+**Project:** Cozy Den - Personal landing page for hiddenden.cafe
+**Owner:** Latte (gay furry developer, values self-hosting and privacy)
+**Tech Stack:** Astro 4.x, TypeScript, Vanilla CSS, Docker + Nginx
+**Aesthetic:** Warm coffee/cappuccino theme, cozy hidden den vibes
+**Deployment:** Docker containers pushed to Gitea registry at git.hiddenden.cafe
+
+## Core Design Principles
+
+1. **Cozy Aesthetic** - Warm colors, coffee/cappuccino theme, hidden den vibes
+2. **Self-Hosted** - Everything runs on personal infrastructure (homelab/VPS)
+3. **Privacy First** - No tracking, no external dependencies
+4. **Lightweight** - Static HTML/CSS, minimal JavaScript
+5. **Docker-Ready** - Easy deployment via containers
+
+## File Structure
+
+```
+cozy-den/
+├── src/
+│   ├── layouts/
+│   │   └── BaseLayout.astro      # Base layout + global styles
+│   └── pages/
+│       ├── index.astro            # Main landing page
+│       └── 404.astro              # Custom 404 page
+├── public/
+│   ├── favicon.svg                # Coffee emoji favicon
+│   └── robots.txt                 # Search engine directives
+├── astro.config.mjs               # Astro config with sitemap
+├── package.json                   # Dependencies (Astro 4.x, @astrojs/sitemap)
+├── Dockerfile                     # Multi-stage: Node builder + Nginx
+├── docker-compose.yml             # Local container orchestration
+└── nginx.conf                     # Production web server config
+```
+
+## Architecture Notes
+
+This is a simple static site following standard Astro conventions:
+- Layouts in `src/layouts/` for reusable page templates
+- Pages in `src/pages/` (routes automatically based on filename)
+- All content is on a single page (`index.astro`) with multiple sections
+- Custom 404 page with cozy theming
+- No client-side JavaScript - pure static HTML/CSS output
+- CSS custom properties centralized in `BaseLayout.astro` for theming
+- Accessibility improvements with ARIA labels and semantic HTML
+
+## Commands
+
+```bash
+# Development
+npm install          # Install dependencies
+npm run dev          # Start dev server at http://localhost:4321
+npm run build        # Build for production (runs astro check + astro build)
+npm run preview      # Preview production build
+
+# Docker
+docker build -t cozy-den .
+docker run -d -p 3000:80 --name cozy-den cozy-den
+docker-compose up -d
+
+# Deployment to Gitea registry
+docker tag cozy-den git.hiddenden.cafe/mats/cozy-den:latest
+docker login git.hiddenden.cafe
+docker push git.hiddenden.cafe/mats/cozy-den:latest
+```
+
+## Color System
+
+All colors use CSS custom properties in `BaseLayout.astro`:
+
+```css
+--color-bg: #1a1410           /* Dark background (deep coffee) */
+--color-bg-light: #2a1f18     /* Lighter background for cards */
+--color-text: #f4e9d8          /* Cream text */
+--color-text-dim: #c4b5a0      /* Dimmed text */
+--color-accent: #d4a574        /* Warm accent (coffee with cream) */
+--color-accent-bright: #e8bf8e /* Brighter accent for highlights */
+--color-warm: #8b6f47          /* Warm brown for borders/accents */
+```
+
+**To change theme:** Edit these variables. All components update automatically.
+
+## Common Modification Patterns
+
+### Adding a Section
+```astro
+<section class="section new-section">
+  <div class="container">
+    <div class="card fade-in">
+      <h2>Section Title</h2>
+      <p>Content</p>
+    </div>
+  </div>
+</section>
+```
+
+### Adding a Service
+```astro
+<div class="service-item">
+  <h3><a href="https://service.hiddenden.cafe">🔧 Service Name</a></h3>
+  <p>Description of the service</p>
+</div>
+```
+
+### Adding a New Page
+Create new `.astro` file in `src/pages/`:
+```astro
+---
+import BaseLayout from '../layouts/BaseLayout.astro';
+---
+
+<BaseLayout title="New Page">
+  <div class="container">
+    <h1>New Page</h1>
+  </div>
+</BaseLayout>
+```
+Note: Pages route based on filename (e.g., `about.astro` → `/about`)
+
+## Implementation Guidelines
+
+**DO:**
+- Maintain cozy, warm aesthetic (coffee/cappuccino theme)
+- Keep site lightweight - static HTML/CSS only, no JavaScript runtime
+- Use CSS custom properties for all colors (defined in `src/layouts/BaseLayout.astro`)
+- Use `.fade-in` class for animations, `.card` class for consistent card styling
+- Test production builds and Docker builds after changes
+- Ensure responsive design works on mobile
+- Follow standard Astro structure (layouts in `src/layouts/`, pages in `src/pages/`)
+
+**DON'T:**
+- Add tracking or external dependencies (privacy-first approach)
+- Add client-side JavaScript unless absolutely necessary
+- Break the coffee/warm color theme
+- Create sterile or corporate design elements
+
+## Astro-Specific Notes
+
+- Frontmatter (code between `---`) runs at build time only
+- `<style>` tags are scoped by default; use `<style is:global>` for global styles (see `src/layouts/BaseLayout.astro`)
+- Site generates static HTML at build time - no JavaScript runtime
+- Sitemap integration configured in `astro.config.mjs` via `@astrojs/sitemap`
+- Custom 404 page at `src/pages/404.astro` with warm, themed styling
+
+## Context & Preferences
+
+- **Owner:** Latte (gay furry developer who values self-hosting, privacy, and open-source)
+- **Deployment:** All deployments via Docker to personal Gitea registry (git.hiddenden.cafe)
+- **Design Philosophy:** Warm, personal, cozy aesthetic over corporate/sterile design
+- **Technical Background:** Owner typically uses Python/Flask, learning Astro with this project
+
+## Troubleshooting
+
+**Build fails:** Check TypeScript config, ensure Node 18+, run `astro check`
+**Styles not applying:** Verify CSS variables are in `BaseLayout.astro`, check if you need `is:global`
+**Docker build fails:** Ensure `package.json` and `package-lock.json` exist
+**Changes not showing:** Hard refresh browser, restart dev server, or clear `.astro` cache
+
+## Related Documentation
+
+- **PROJECT_CONTEXT.md** - Design principles and project philosophy
+- **DEVELOPMENT.md** - Detailed developer documentation
+- **TODO.md** - Current tasks and future feature ideas
+- **README.md** - User-facing setup and deployment guide
diff --git a/DEVELOPMENT.md b/DEVELOPMENT.md
index 03e8e3c..518053d 100644
--- a/DEVELOPMENT.md
+++ b/DEVELOPMENT.md
@@ -19,11 +19,13 @@ cozy-den/
 │   ├── layouts/
 │   │   └── BaseLayout.astro      # Base HTML layout with global styles
 │   ├── pages/
-│   │   └── index.astro            # Main landing page
+│   │   ├── index.astro            # Main landing page
+│   │   └── 404.astro              # Custom 404 error page
 │   └── components/                # (Empty - ready for future components)
 ├── public/
-│   └── favicon.svg                # Site favicon (coffee emoji)
-├── astro.config.mjs               # Astro configuration
+│   ├── favicon.svg                # Site favicon (coffee emoji)
+│   └── robots.txt                 # Search engine directives
+├── astro.config.mjs               # Astro configuration with sitemap
 ├── package.json                   # Node dependencies
 ├── tsconfig.json                  # TypeScript configuration
 ├── Dockerfile                     # Multi-stage Docker build
@@ -67,6 +69,14 @@ The main page includes these sections:
 5. **Support** - Ways to help/contribute
 6. **Footer** - Links and credits
 
+### 404.astro
+
+Custom error page with:
+- Themed styling matching the cozy aesthetic
+- Clear error message ("Lost in the Den?")
+- Action buttons to return home or visit Gitea
+- Responsive design for all devices
+
 ## Development Workflow
 
 ### Local Development
diff --git a/PROJECT_CONTEXT.md b/PROJECT_CONTEXT.md
index b7deab4..13df848 100644
--- a/PROJECT_CONTEXT.md
+++ b/PROJECT_CONTEXT.md
@@ -29,6 +29,10 @@ The site currently has:
 - ✅ Support section
 - ✅ Docker deployment setup
 - ✅ Responsive design
+- ✅ Custom 404 page with themed styling
+- ✅ Sitemap integration for SEO
+- ✅ robots.txt for search engines
+- ✅ Accessibility improvements (ARIA labels, semantic HTML)
 
 ## What Might Be Added Later
 
@@ -55,9 +59,9 @@ Main content is in `src/pages/index.astro`. Each section is wrapped in semantic
 
 ### File Organization
 - `src/layouts/` - Reusable layouts (currently just BaseLayout)
-- `src/pages/` - Routes (index.astro = homepage)
+- `src/pages/` - Routes (index.astro = homepage, 404.astro = error page)
 - `src/components/` - Reusable components (empty, ready for future use)
-- `public/` - Static assets (favicon, images)
+- `public/` - Static assets (favicon.svg, robots.txt)
 
 ## Communication Style
 
diff --git a/TODO.md b/TODO.md
index 2fd4353..dd12a94 100644
--- a/TODO.md
+++ b/TODO.md
@@ -1,10 +1,14 @@
 # Cozy Den - Tasks & TODO
 
 ## Current Status
-✅ Initial project structure created
+✅ Initial project structure created (proper src/ directory)
 ✅ Landing page with all main sections
 ✅ Docker deployment setup
 ✅ Responsive design
+✅ Custom 404 page
+✅ Sitemap integration
+✅ robots.txt
+✅ Accessibility improvements (ARIA labels, semantic HTML)
 
 ## Immediate Next Steps
 
@@ -17,7 +21,7 @@
 ### Optional Enhancements
 
 #### Short Term
-- [ ] Add a custom 404 page
+- [x] Add a custom 404 page
 - [ ] Add favicon variants for different platforms (apple-touch-icon, etc.)
 - [ ] Add Open Graph meta tags for social media sharing
 - [ ] Add animation on scroll for sections
@@ -90,9 +94,9 @@ Pull repository data from Gitea API and display:
 - [ ] Consider breaking large components into smaller ones
 - [ ] Add comments for complex CSS
 - [ ] Set up automated testing if site grows
-- [ ] Add accessibility audit
+- [x] Add accessibility audit
 - [ ] Optimize images if any are added
-- [ ] Consider adding a sitemap.xml
+- [x] Consider adding a sitemap.xml
 
 ## Performance Optimization