diff --git a/CHANGELOG.md b/CHANGELOG.md
index 19694452..db811b76 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -21,6 +21,7 @@
 
 ### 🎨 변경 사항 (UX / 접근성)
 
+- 로그인·관리자 로그인·비밀번호 재설정의 제출 대기 상태에 기존 상태 문구를 보조하는 장식 로딩 아이콘을 추가했습니다. 아이콘은 접근성 트리에서 숨기고, 운영체제의 reduced-motion 선호가 켜진 경우 회전 애니메이션을 중지합니다.
 - 세션 활동 리본은 시각적으로 현재인 이벤트를 토글 버튼으로 오인시키지 않고 `aria-current`로 노출하며, 병합된 도구 실행은 `Expand … group` 다음 행동과 포함 이벤트 수를 명확히 안내합니다.
 - 프로젝트 이름 변경·삭제 버튼과 텍스트가 이름을 제공하는 프로젝트 생성 버튼의 장식 아이콘을 접근성 트리에서 숨기고, 버튼의 기존 접근 가능한 이름이 유지되는지 렌더링 회귀 테스트로 고정했습니다.
 - 웹 대시보드의 각종 로그아웃 버튼(`org-sidebar.tsx`, `org-header.tsx`, `no-organization-state.tsx`)에 스크린 리더용 `aria-label="Log out of your account"` (또는 `Sign out of your account`) 속성을 추가하여 접근성을 개선했습니다.
diff --git a/packages/web/src/app/login/page.tsx b/packages/web/src/app/login/page.tsx
index 75d1858a..1f5e011b 100644
--- a/packages/web/src/app/login/page.tsx
+++ b/packages/web/src/app/login/page.tsx
@@ -3,7 +3,7 @@
 import { useState } from 'react'
 import { signIn } from 'next-auth/react'
 import { useRouter } from 'next/navigation'
-import { Button } from '@/components/ui/button'
+import { Button, ButtonLoadingContent } from '@/components/ui/button'
 import { Input } from '@/components/ui/input'
 import { Label } from '@/components/ui/label'
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card'
@@ -75,7 +75,11 @@ export default function LoginPage() {
               <p className="text-sm text-destructive">{error}</p>
             )}
             <Button type="submit" className="w-full" disabled={loading}>
-              {loading ? 'Signing in...' : 'Sign in'}
+              {loading ? (
+                <ButtonLoadingContent>Signing in...</ButtonLoadingContent>
+              ) : (
+                'Sign in'
+              )}
             </Button>
           </form>
           <div className="mt-4 text-center text-sm">
diff --git a/packages/web/src/components/admin/admin-login-form.tsx b/packages/web/src/components/admin/admin-login-form.tsx
index b1dbdadf..d541ae7c 100644
--- a/packages/web/src/components/admin/admin-login-form.tsx
+++ b/packages/web/src/components/admin/admin-login-form.tsx
@@ -4,7 +4,7 @@ import { useState } from 'react'
 import { Lock } from 'lucide-react'
 import { useRouter } from 'next/navigation'
 
-import { Button } from '@/components/ui/button'
+import { Button, ButtonLoadingContent } from '@/components/ui/button'
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card'
 import { Input } from '@/components/ui/input'
 import { Label } from '@/components/ui/label'
@@ -76,7 +76,11 @@ export function AdminLoginForm() {
             </div>
             {error && <p className="text-sm text-destructive">{error}</p>}
             <Button type="submit" className="w-full" disabled={loading}>
-              {loading ? 'Signing in...' : 'Sign in'}
+              {loading ? (
+                <ButtonLoadingContent>Signing in...</ButtonLoadingContent>
+              ) : (
+                'Sign in'
+              )}
             </Button>
           </form>
         </CardContent>
diff --git a/packages/web/src/components/auth/reset-password-form.tsx b/packages/web/src/components/auth/reset-password-form.tsx
index 99066a69..f4f28bfa 100644
--- a/packages/web/src/components/auth/reset-password-form.tsx
+++ b/packages/web/src/components/auth/reset-password-form.tsx
@@ -4,7 +4,7 @@ import { useState } from 'react'
 import Link from 'next/link'
 
 import { Alert, AlertDescription, AlertTitle } from '@/components/ui/alert'
-import { Button, buttonVariants } from '@/components/ui/button'
+import { Button, ButtonLoadingContent, buttonVariants } from '@/components/ui/button'
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card'
 import { Input } from '@/components/ui/input'
 import { Label } from '@/components/ui/label'
@@ -110,7 +110,11 @@ export function ResetPasswordForm({ token, email }: ResetPasswordFormProps) {
             </Alert>
           )}
           <Button type="submit" className="w-full" disabled={loading}>
-            {loading ? 'Updating...' : 'Update password'}
+            {loading ? (
+              <ButtonLoadingContent>Updating...</ButtonLoadingContent>
+            ) : (
+              'Update password'
+            )}
           </Button>
         </form>
       </CardContent>
diff --git a/packages/web/src/components/ui/button.test.tsx b/packages/web/src/components/ui/button.test.tsx
new file mode 100644
index 00000000..7568197d
--- /dev/null
+++ b/packages/web/src/components/ui/button.test.tsx
@@ -0,0 +1,18 @@
+import React from 'react'
+import { renderToStaticMarkup } from 'react-dom/server'
+import { describe, expect, it } from 'vitest'
+
+import { ButtonLoadingContent } from './button'
+
+describe('ButtonLoadingContent', () => {
+  it('keeps loading copy readable while the decorative spinner respects reduced motion', () => {
+    const markup = renderToStaticMarkup(
+      <ButtonLoadingContent>Signing in...</ButtonLoadingContent>,
+    )
+
+    expect(markup).toContain('aria-hidden="true"')
+    expect(markup).toContain('animate-spin')
+    expect(markup).toContain('motion-reduce:animate-none')
+    expect(markup).toContain('Signing in...')
+  })
+})
diff --git a/packages/web/src/components/ui/button.tsx b/packages/web/src/components/ui/button.tsx
index 09df7536..4f10d3c4 100644
--- a/packages/web/src/components/ui/button.tsx
+++ b/packages/web/src/components/ui/button.tsx
@@ -1,3 +1,6 @@
+import React from 'react'
+import { Loader2 } from 'lucide-react'
+import type { ReactNode } from 'react'
 import { Button as ButtonPrimitive } from "@base-ui/react/button"
 import { cva, type VariantProps } from "class-variance-authority"
 
@@ -55,4 +58,17 @@ function Button({
   )
 }
 
-export { Button, buttonVariants }
+
+function ButtonLoadingContent({ children }: { children: ReactNode }) {
+  return (
+    <>
+      <Loader2
+        className="mr-2 h-4 w-4 animate-spin motion-reduce:animate-none"
+        aria-hidden="true"
+      />
+      {children}
+    </>
+  )
+}
+
+export { Button, ButtonLoadingContent, buttonVariants }