style(docs): simplify article sidebar surface

docs/src/pages/article.tsx

@@ -8,11 +8,7 @@ import {
   resolveDocLocation,
 } from "../content/registry"
 import type { DocLocation, DocPage, DocTocItem } from "../content/types"
-import {
-  Actions,
-  SiteFooter,
-  SiteHeader,
-} from "../components/layout"
+import { Actions, SiteFooter, SiteHeader } from "../components/layout"
 import { mdxComponents } from "../components/mdx"
 import { useLocale, useTranslate } from "../lib/locale"
 
@@ -218,7 +214,7 @@ export default function ArticlePage({ pathname }: { pathname: string }) {
       <div className="flex w-full">
         <div
           data-slot="left"
-          className="sticky top-16 hidden h-[calc(100svh-(--spacing(16)))] min-w-(--min-lw) flex-[6_1_var(--min-lw)] overflow-y-auto border-r bg-slate-50 md:block dark:border-slate-800 dark:bg-slate-900/50"
+          className="sticky top-16 hidden h-[calc(100svh-(--spacing(16)))] min-w-(--min-lw) flex-[6_1_var(--min-lw)] overflow-y-auto border-r md:block dark:border-slate-800"
         >
           <aside className="ml-auto w-full max-w-(--max-lw) p-8">
             <Sidebar current={docLocation} />