Visual refresh of docs site

docs/sandbox.md

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+---
+title: Visual sandbox
+description: Reference page for reviewing the visual refresh.
+unlisted: true
+slug: /sandbox
+---
+
+# Visual sandbox
+
+Reference page rendering one example of every pattern from the visual refresh ([issue #492](https://github.com/openrewrite/rewrite-docs/issues/492)). Used for designer/PM review of staged PRs.
+
+## Typography
+
+# Heading 1 — page title scale
+
+## Heading 2 — section
+
+### Heading 3 — subsection
+
+#### Heading 4
+
+Body paragraph using Inter at the docs base size. Includes an [inline link](/sandbox) and `inline code`. Set against the off-white background that runs across the site.
+
+## Admonitions
+
+:::info
+For a better understanding of the permissions requested, please review our [GitHub permissions reference documentation](/sandbox).
+:::
+
+:::tip
+Run `mod recipe debug` first if you want to see the LST output before applying any change.
+:::
+
+:::note
+Running a recipe _does not_ automatically update the code in the selected repositories. You will be able to view the results and decide what you want to commit.
+:::
+
+:::warning
+Depending on what organization you ran the recipe against, you may not have access to commit code or create a PR. Please don't try and open PRs against random projects that aren't your own.
+:::
+
+:::caution
+If you are still on the legacy Neon development database, do not share your `DATABASE_URL`. It contains your database credentials.
+:::
+
+:::danger
+Force-pushing to `master` rewrites history for every collaborator. Coordinate before doing this.
+:::
+
+## Markdown link-list cards
+
+Plain markdown bulleted lists where every item is just a link render as cards. This pattern shows up on recipe README pages.
+
+### Categories
+
+- [FF4j](/sandbox)
+- [LaunchDarkly](/sandbox)
+- [OpenFeature](/sandbox)
+- [Quarkus](/sandbox)
+
+### Recipes
+
+- [Remove a String feature flag for feature key](/sandbox)
+- [Remove a boolean feature flag for feature key](/sandbox)
+- [Remove a double feature flag for feature key](/sandbox)
+
+## DocCard layout
+
+Generated index page cards (e.g. `/changelog`, `/recipes`, `/authoring-recipes`) are full-width and stacked vertically. See [Changelog](/changelog) for a live example.
+
+## Sidebar nav
+
+The left-hand sidebar uses bold dark text for collapsible categories, blue for the active expanded section, and regular weight for child items.