Update Preflight html styles to include shadow DOM :host pseudo-class (#11200)

* Extend current preflight `html` styles to support other root/host scopes

Supports SVG root scope, ShadowDOM, and presumably other root scopes

* Replace `:root` with `html`

* Update tests

* Update changelog

---------

Co-authored-by: Jonathan Reinink <[email protected]>

Author: 2 people

CHANGELOG.md

@@ -13,6 +13,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Add `has-*` variants for `:has(...)` pseudo-class ([#11318](https://github.com/tailwindlabs/tailwindcss/pull/11318))
 - Add `text-wrap` utilities including `text-balance` and `text-pretty` ([#11320](https://github.com/tailwindlabs/tailwindcss/pull/11320), [#12031](https://github.com/tailwindlabs/tailwindcss/pull/12031))
 - Extend default `opacity` scale to include all steps of 5 ([#11832](https://github.com/tailwindlabs/tailwindcss/pull/11832))
+- Update Preflight `html` styles to include shadow DOM `:host` pseudo-class ([#11200](https://github.com/tailwindlabs/tailwindcss/pull/11200))
 
 
 ## [3.3.6] - 2023-12-04

src/css/preflight.css

@@ -26,7 +26,8 @@
 6. Use the user's configured `sans` font-variation-settings by default.
 */
 
-html {
+html,
+:host {
   line-height: 1.5; /* 1 */
   -webkit-text-size-adjust: 100%; /* 2 */
   -moz-tab-size: 4; /* 3 */