AstroPaper is a minimal, responsive, accessible and SEO-friendly Astro blog theme/template. It provides a complete blogging platform with features like light/dark mode toggle, dynamic OG image generation, static search with Pagefind, RSS/sitemap generation, tag and archive pages, and internationalization support. Built with Astro v6, Tailwind CSS v4, and TypeScript, it follows modern web development practices with a component-based architecture. The theme separates concerns effectively: configurations in astro-paper.config.ts, resolved settings in src/config.ts, UI components in src/components/, layouts in src/layouts/, pages in src/pages/, and content in src/content/. It handles complex edge cases like Unicode slugification, timezone-aware date formatting, and view transition compatibility with thoughtful, reusable utilities.