# Switching the blog theme

The blog theme is **not** selected by a file name – it is controlled by the **`~shareCss` relation**
on the blog root note (`Richard's Blog`) inside Trilium. The relation points at a `text/css` note
that holds the theme stylesheet. Everything below uses the notes of this repository's live blog;
note IDs are given for reference.

## Available themes

| Theme | Repo file | Live note | Dark / light |
|---|---|---|---|
| Coffee (default) | `theme/blog_share_theme_coffee.css` | `NqZXcFRGi3II` | espresso / latte-cream |
| Harbor | `theme/blog_share_theme_harbor.css` | `Ep54EDTwKxup` | harbordark / paper |
| Gruvbox | `theme/blog_share_theme_gruvbox.css` | `edhL5cByGwqA` | gruvbox dark / light |

All three themes include a `html.theme-light` + `html.theme-dark` block, theme-aware **3D viewer**
overlays and **Mermaid** rendering. The 3D viewer reads the theme's CSS variables
(`--background-primary` for the canvas, `--background-active` for the model material), so it adapts
automatically to whichever theme is active – no script changes needed.

## How the active theme is resolved

1. The blog root note (`Richard's Blog`, `OKjkpgmXZY1L`) carries `~shareCss` → `blog_share_theme_*.css`.
2. The target note is a `code` note with mime `text/css` living under `.blog` (the share system note).
3. The public share renders the page and loads that note's CSS.

## Switching themes

Pick the target note and re-point the relation. The theme note already exists in Trilium (see the
table above), so only the relation needs to change.

### Option A – via the Trilium UI

1. Find the target theme note under `.blog` (e.g. `blog_share_theme_gruvbox.css`).
2. Open `Richard's Blog` → Attributes → edit the `~shareCss` relation to point at that note.
3. Hard-refresh the blog (Ctrl+F5). Done.

### Option B – via ETAPI (scriptable)

```bash
TOKEN="your-etapi-token"
SERVER="https://notes.familie-zink.org"

# 1. Delete the current shareCss relation on the blog root (OKjkpgmXZY1L)
curl -X DELETE "$SERVER/etapi/attributes/<attributeId>" -H "Authorization: $TOKEN"

# 2. Point shareCss at the desired theme note (example: Gruvbox edhL5cByGwqA)
curl -X POST "$SERVER/etapi/attributes" \
  -H "Authorization: $TOKEN" -H "Content-Type: application/json" \
  -d '{"noteId":"OKjkpgmXZY1L","type":"relation","name":"shareCss","value":"edhL5cByGwqA","isInheritable":true}'
```

The attribute ID of the old `shareCss` relation can be looked up via
`GET $SERVER/etapi/notes/OKjkpgmXZY1L/attributes` (or the Trilium attribute list on the note).

### Option C – create a fresh theme note from this repo

If you want to add or customise a theme on a new Trilium instance:

1. Create a `code` note with mime `text/css` under `.blog`, title e.g. `blog_share_theme_coffee.css`.
2. Copy the contents of the matching `theme/blog_share_theme_*.css` file into it.
3. Point `~shareCss` on the blog root at the new note (Option A or B).

> **Tip:** After a theme/content change the page may be cached – do a hard reload. If you run
> nginx proxy caching, also clear the cache (see `AGENTS.md` / the nginx guide).