Add README.md and CLAUDE.md

README: project overview, stack, dev/build commands, content
import workflow, design tokens, deployment notes.
CLAUDE.md: Claude Code guidance — commands, CSS pipeline, content
model, layout hierarchy, JS architecture, data flow.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

CLAUDE.md

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+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Commands
+
+```bash
+pnpm dev            # Tailwind watch + Hugo dev server in parallel
+pnpm build          # build:css then hugo --minify → public/
+pnpm build:css      # Tailwind only → static/css/main.css
+pnpm watch:css      # Tailwind watch (CSS only)
+hugo server -D      # Hugo dev server (drafts included)
+hugo --minify       # Production build
+python3 scripts/import-posts.py  # Import posts from ~/projects/ginger/posts.csv
+```
+
+CSS must be compiled before Hugo runs. `pnpm build` does both in order. In dev, `pnpm dev` runs both concurrently.
+
+## Architecture
+
+**Hugo Extended** static site with **Tailwind CSS v4** (no config file — design tokens live in `@theme {}` in `assets/css/main.css`).
+
+### CSS pipeline
+
+Tailwind reads `assets/css/main.css` and writes to `static/css/main.css` (gitignored — build artefact). The `@theme {}` block defines all design tokens (`--color-paper`, `--color-roux`, `--font-display`, etc.). Global resets are in `@layer base` so Tailwind utility classes correctly override them.
+
+### Content model
+
+- `content/posts/<slug>/index.md` — page bundles; each has a `plate` number, `issues`, `categories` (single item), `tags`, `featured` flag, and a `.png` image resource.
+- `content/issues/<id>/_index.md` — branch bundle for an issue; metadata (`title`, `description`, `issueNumber`, `season`, `status`) drives the homepage hero and issue list page.
+- `content/imprint.md` — standalone page using `layout: imprint`.
+
+Taxonomies: `categories`, `tags`, `issues` (defined in `hugo.toml`).
+
+### Layout hierarchy
+
+```
+layouts/baseof.html          ← shell: head, header, main, footer, lightbox, roux-data JSON
+layouts/index.html           ← homepage: current-issue hero + 5 featured plates
+layouts/_default/list.html   ← two branches: kind="taxonomy" (term cards) | kind="term"/section (paginated post grid)
+layouts/_default/single.html ← post plate page (triggers lightbox via window.__ROUX_OPEN_SLUG)
+layouts/_default/imprint.html← prose page layout
+layouts/issues/list.html     ← paginated post grid scoped to an issue
+layouts/issues/terms.html    ← issue index, reads issueIds from hugo.toml params
+layouts/404.html             ← editorial 404 page
+```
+
+Key partials: `header.html`, `footer.html`, `card.html` (reusable post card), `lightbox.html`, `pagination.html`, `logo.html`.
+
+### JavaScript (`static/js/app.js`)
+
+Single vanilla JS file, no build step. Loaded from `baseof.html`. Reads `#roux-data` (JSON injected by Hugo containing all posts) at runtime.
+
+Responsibilities:
+- **Inverted search index** — weighted token scoring across title, tags, categories, description; prefix matching; renders into `#searchpop`.
+- **Lightbox** — full-screen plate viewer with keyboard nav, thumbnail strip, share/copy URL, meta panel. Opened automatically when `window.__ROUX_OPEN_SLUG` is set (direct URL to a post).
+- **Ribbon** dismiss, tab sync, view transitions (`document.startViewTransition`), masthead date.
+
+### Data flow: homepage featured plates
+
+The homepage shows exactly the posts with `featured: true` in frontmatter. Mark posts via `featured: true`; the template filters with `where .Site.RegularPages ".Params.featured" true`.
+
+### Content import
+
+`scripts/import-posts.py` reads `~/projects/ginger/posts.csv` and `~/projects/ginger/images/final/selected/`. It creates/updates page bundles deterministically (sorted by filename → stable plate numbers). Run it from the repo root after updating the upstream CSV or image set.
+
+### Hugo params (hugo.toml)
+
+`issueNumber`, `issueName`, `issueSeason`, `issueBlurb` are fallback values used when `$.Site.GetPage "/issues/01"` returns nil. `issueIds` drives the issues terms page. `umamiSrc`/`umamiId` are injected only in production (`hugo.IsProduction`).
+
+### nginx
+
+`nginx.conf` at repo root is the production server config (used in Docker). `error_page 404 /404.html` is already wired.