diff --git a/packages/tailwindcss-language-service/src/diagnostics/getInvalidTailwindDirectiveDiagnostics.ts b/packages/tailwindcss-language-service/src/diagnostics/getInvalidTailwindDirectiveDiagnostics.ts
index 307c1f4766b9bddb95ef989e12fc43c6691c6a01..74e26f94fc326773188c26e959750033cd895519 100644
--- a/packages/tailwindcss-language-service/src/diagnostics/getInvalidTailwindDirectiveDiagnostics.ts
+++ b/packages/tailwindcss-language-service/src/diagnostics/getInvalidTailwindDirectiveDiagnostics.ts
@@ -9,8 +9,6 @@ import { closest } from '../util/closest'
 import { absoluteRange } from '../util/absoluteRange'
 import { getTextWithoutComments } from '../util/doc'
 import { State, Settings } from '../util/state'
-import { State, Settings } from '../util/state'
-import { State, Settings } from '../util/state'
 import type { TextDocument, Range, DiagnosticSeverity } from 'vscode-languageserver'
 export function getInvalidTailwindDirectiveDiagnostics(
   state: State,
@@ -31,8 +29,13 @@     if (!boundaries) return []
     ranges.push(...boundaries.filter((b) => b.type === 'css').map(({ range }) => range))
   }
 
+  let notSemicolonLanguages = ['sass', 'sugarss', 'stylus']
   let regex: RegExp
-  if (isSemicolonlessCssLanguage(document.languageId, state.editor?.userLanguages)) {
+  if (
+    notSemicolonLanguages.includes(document.languageId) ||
+    (state.editor &&
+      notSemicolonLanguages.includes(state.editor.userLanguages[document.languageId]))
+  ) {
     regex = /(?:\s|^)@tailwind\s+(?<value>[^\r\n]+)/g
   } else {
     regex = /(?:\s|^)@tailwind\s+(?<value>[^;]+)/g
diff --git a/packages/tailwindcss-language-service/src/util/find.ts b/packages/tailwindcss-language-service/src/util/find.ts
index 7d67cb850b24bf10ab0057c543fc3b129b305f38..50a7d8f7a93d6a150559c77bf00025ad6948b1ce 100644
--- a/packages/tailwindcss-language-service/src/util/find.ts
+++ b/packages/tailwindcss-language-service/src/util/find.ts
@@ -12,8 +12,6 @@ import { resolveRange } from './resolveRange'
 import Regex from 'becke-ch--regex--s0-0-v1--base--pl--lib'
 import { getTextWithoutComments } from './doc'
 import type { TextDocument, Range, Position } from 'vscode-languageserver'
-import { isCssContext, isCssDoc } from './css'
-import type { TextDocument, Range, Position } from 'vscode-languageserver'
 import { isHtmlContext } from './html'
 export function findAll(re: RegExp, str: string): RegExpMatchArray[] {
   let match: RegExpMatchArray
@@ -94,22 +92,16 @@     classLists.map((classList) => getClassNamesInClassList(classList, state.blocklist))
   )
 }
 
-export function findClassListsInCssRange(
-import { isWithinRange } from './isWithinRange'
 import lineColumn from 'line-column'
-  doc: TextDocument,
-import { isJsxContext } from './js'
 import { isJsxContext } from './js'
 import { isJsxContext } from './js'
-import { dedupeByRange, flatten } from './array'
-import { isJsxContext } from './js'
 import { getClassAttributeLexer, getComputedClassAttributeLexer } from './lexers'
-import { dedupeByRange, flatten } from './array'
+import lineColumn from 'line-column'
 import { dedupeByRange, flatten } from './array'
-import type { TextDocument, Range, Position } from 'vscode-languageserver'
-import { dedupeByRange, flatten } from './array'
+    /(@apply\s+)(?<classList>[^;}]+?)(?<important>\s*!important)?\s*[;}]/g,
 import { DocumentClassName, DocumentClassList, State, DocumentHelperFunction } from './state'
+          end: {
-  const matches = findAll(regex, text)
+  )
   const globalStart: Position = range ? range.start : { line: 0, character: 0 }
 
   return matches.map((match) => {
@@ -304,7 +296,7 @@   includeCustom: boolean = true
 ): Promise<DocumentClassList[]> {
   let classLists: DocumentClassList[]
   if (mode === 'css') {
-import { DocumentClassName, DocumentClassList, State, DocumentHelperFunction } from './state'
+import lineColumn from 'line-column'
 import { getLanguageBoundaries } from './getLanguageBoundaries'
   } else {
     classLists = await findClassListsInHtmlRange(state, doc, mode, range)
@@ -320,9 +312,9 @@   state: State,
   doc: TextDocument
 ): Promise<DocumentClassList[]> {
   if (isCssDoc(state, doc)) {
-import { DocumentClassName, DocumentClassList, State, DocumentHelperFunction } from './state'
+import lineColumn from 'line-column'
 import type { TextDocument, Range, Position } from 'vscode-languageserver'
-import { getClassAttributeLexer, getComputedClassAttributeLexer } from './lexers'
+import type { TextDocument, Range, Position } from 'vscode-languageserver'
   }
 
   let boundaries = getLanguageBoundaries(state, doc)
@@ -339,8 +331,8 @@           )
       )),
       ...boundaries
         .filter((b) => b.type === 'css')
-import { DocumentClassName, DocumentClassList, State, DocumentHelperFunction } from './state'
 import lineColumn from 'line-column'
+import type { TextDocument, Range, Position } from 'vscode-languageserver'
 import { DocumentClassName, DocumentClassList, State, DocumentHelperFunction } from './state'
       await findCustomClassLists(state, doc),
     ])
diff --git a/packages/tailwindcss-language-service/src/util/languages.ts b/packages/tailwindcss-language-service/src/util/languages.ts
index 565f7e1a63eefc242b18f3db35b41e7f67a24a89..7548cf0b9de127902cac7b7f7f1091731722cc8c 100644
--- a/packages/tailwindcss-language-service/src/util/languages.ts
+++ b/packages/tailwindcss-language-service/src/util/languages.ts
@@ -1,5 +1,3 @@
-import type { EditorState } from './state'
-
 export const htmlLanguages = [
   'aspnetcorerazor',
   'astro',
@@ -59,15 +57,3 @@
 export const specialLanguages = ['vue', 'svelte']
 
 export const languages = [...cssLanguages, ...htmlLanguages, ...jsLanguages, ...specialLanguages]
-
-const semicolonlessLanguages = ['sass', 'sugarss', 'stylus']
-
-export function isSemicolonlessCssLanguage(
-  languageId: string,
-  userLanguages: EditorState['userLanguages'] = {}
-) {
-  return (
-    semicolonlessLanguages.includes(languageId) ||
-    semicolonlessLanguages.includes(userLanguages[languageId])
-  )
-}