/* rt-theme.css — the place where a theme puts what it changes, on top of the base (rt-base.css).
 *
 * This default one is empty on purpose. A theme package (listed before this one in the engine config "packages") ships a file of the
 * same name, and its file is served instead: the base stays the same, the theme only says what differs. Put everything in
 * `@layer rt-theme { … }`: redeclare tokens (--rt-accent, --rt-radius…) and adjust components. Your own CSS outside any layer
 * (rt-user.css) still wins over all of it.
 *
 * See packages/theme-ledger for an example that changes nearly everything.
 */