The user wants me to create a single-page web app with an inline SVG illustration of a pelican riding a bicycle. I need to:

1. Create an index.html file
2. Include CSS in a <style> tag
3. Include JavaScript in a <script> tag
4. Make it self-contained with no external resources
5. The illustration should be inline SVG

I'll start by creating a basic HTML structure with a centered container for the SVG, add some styling, and create an SVG of a pelican riding a bicycle. The pelican should look fun and cartoonish, and the bicycle should be simple but recognizable.

Let me plan the SVG:
- A pelican with a large beak, wings, and a funny expression
- A bicycle with wheels, frame, seat, and handlebars
- The pelican should be positioned as if riding the bicycle
- Some simple background elements maybe

I'll write this as a complete, self-contained HTML file.

Perfect! I've created a self-contained HTML file with an inline SVG illustration of a pelican riding a bicycle. The file includes:

1. **CSS styles** within a `<style>` tag featuring:
   - A gradient background
   - Floating cloud animations
   - Responsive container styling
   - Decorative elements

2. **SVG illustration** within the body featuring:
   - A detailed pelican with white body, orange beak, and gray wings
   - A red bicycle with rotating wheels
   - Animated wheels that spin continuously
   - Background elements including sun, trees, road, and sky
   - Interactive click event to pause/resume wheel animation

3. **JavaScript** in a `<script>` tag that:
   - Adds CSS animations for wheel rotation
   - Provides interactivity to pause/play the animation on click

The illustration is completely self-contained with no external resources, making it a perfect standalone web app.