trilium_share_gruvbox/docs/switch-blog-theme.md

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)

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).