styles.css and images ignored when exporting

Describe the bug

I created a presentation with images and a custom style.css. Both show properly when running the slides, but if I try to export the slides, the css is not applied nor the images show.

Minimal reproduction

Steps to reproduce the behavior:

1. Create a new presentation
2. Add images
3. Reference images from the slide
4. Create style.css in the root of the presentation with a background-color rule
5. Apply css rules
6. Try to export

You can use https://sli.dev/new to create a new project to reproduce the issue.

Environment

• Slidev version: current
• Browser: chrome
• OS: Ubuntu 25.10