What's faithfully preserved

Dune's theme library has two families for the same upstream design. This theme is the faithful one: match Starlight pixel-for-pixel where Dune's architecture allows it. Nightfall (inspired, dark-first) is the Dune-native reimagining still waiting on its polish pass.

The stylesheet is upstream

static/starlight.css bundles upstream global CSS verbatim (cascade layers, props, reset, asides, utils, markdown, anchor-links) plus component styles hand-descoped from each .astro scoped <style> block. Class names that exist upstream exist here.

Client behaviour is upstream

Theme picker, mobile menu, ToC scroll spy, tabs sync, sidebar state persistence, and the search modal shell live in static/starlight.js — the upstream custom-element scripts, bundled. Only the search backend differs (see Adapting to Dune).

Components carry over

Aside, Badge, Card, CardGrid, LinkCard, LinkButton, Steps, Tabs/TabItem (with syncKey), FileTree, Icon — markup identical to upstream user-components. See the Style Guide.

Config keeps familiar names

sidebar_section, pagination, social, edit_link_base, splash hero: blocks, tableOfContents, draft, banner — if you've configured Starlight before, you already know most of this surface.