This is what I understand you want: every site rebuilt from the same elements — the main site's structure, the Lacquer palette, the Loka-feel buttons, the prominent GitHub repo widget, the search box, and the light/dark toggle. Not "similar." The same parts, assembled the same way. The bar above and everything below is built only from those parts.
The structure you like from emmaleonhart.com: fixed translucent top bar, brand left, generous sectioned body, numbered section headers. This whole page is that structure.
One palette, flips with the theme. The "box / colour" surfaces from Sutra and the rest all resolve to these tokens in /identity.css.
The buttons you like from Loka, now the single shared .btn. Primary recoloured to a calmer mid-tone fill — not the garish bright block. Live below.
Sutra's Material repo widget, verbatim: octocat, Owner/Repo, then version · stars · forks. The visible one you prefer over the small pill. Live, in the bar above.
The Material search, as a shared component — now compact, expanding on focus. The one in the bar filters these cards live; try typing "buttons".
The exact MkDocs-Material sun/moon toggle, dark by default, persisted. It sits right next to the GitHub widget in the bar — click it up there.
The soft blurred glow at the edges (you liked it on Loka) — the shared .aurora in /identity.css. It is behind this page right now.
The gradient headline + italic-serif accent you like (the "Vibe Coding, done properly" look). Kept as an identity element — flagged in todo.md to revisit whether to dial it back.
One shared 404.html on every site: a 15s visible countdown, page suggestions ranked by URL similarity (sitemap-driven), then auto-redirect to the subdomain root. Any interaction cancels the redirect.
identity.css (palette + buttons). Need the bar/widget/search alignment.Each site keeps its own content and structure (Sutra's nav is good, your main site's is good) but is rebuilt so the chrome is literally the same parts: this bar, this widget, this search, this toggle, these buttons, this palette. Send the reference attachments and I'll tune this page to match exactly what you're picturing, then roll it site by site.