diff --git a/TaxBaik.Web/Components/Admin/Pages/Login.razor b/TaxBaik.Web/Components/Admin/Pages/Login.razor
index 5a06fdd..08fe249 100644
--- a/TaxBaik.Web/Components/Admin/Pages/Login.razor
+++ b/TaxBaik.Web/Components/Admin/Pages/Login.razor
@@ -10,7 +10,7 @@
 
 <MudThemeProvider />
 
-<MudContainer MaxWidth="MaxWidth.Small" Class="d-flex align-center justify-center" Style="min-height: 100vh;">
+<MudContainer MaxWidth="MaxWidth.Small" Class="admin-login-page d-flex align-center justify-center" Style="min-height: 100vh;">
     <MudPaper Class="pa-8" Elevation="3" Style="width: 100%; max-width: 400px;">
         <MudText Typo="Typo.h4" Class="mb-6 text-center">관리자 로그인</MudText>
 
diff --git a/TaxBaik.Web/wwwroot/css/admin.css b/TaxBaik.Web/wwwroot/css/admin.css
index 9626e50..e7aa498 100644
--- a/TaxBaik.Web/wwwroot/css/admin.css
+++ b/TaxBaik.Web/wwwroot/css/admin.css
@@ -44,47 +44,45 @@ html, body {
     margin-left: 12px !important;
 }
 
-/* MudContainer */
-.mud-container {
+/* Login page scoped fallback styles. Keep these scoped so they do not override MudBlazor globally. */
+.admin-login-page.mud-container {
     width: 100%;
     margin: 0 auto;
 }
 
-.mud-container-maxwidth-small {
+.admin-login-page.mud-container-maxwidth-small {
     max-width: 600px !important;
 }
 
-/* MudPaper */
-.mud-paper {
+.admin-login-page .mud-paper {
     background-color: white;
     border-radius: 4px;
     box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.12);
     padding: 16px;
 }
 
-.mud-paper.elevation-3 {
+.admin-login-page .mud-paper.elevation-3 {
     box-shadow: 0 3px 6px 0 rgba(0, 0, 0, 0.16);
 }
 
-/* MudText */
-.mud-typography {
+.admin-login-page .mud-typography {
     color: #333;
     line-height: 1.5;
 }
 
-.mud-typography--h4 {
+.admin-login-page .mud-typography--h4 {
     font-size: 2.125rem;
     font-weight: 500;
     color: #1976d2;
 }
 
-.mud-typography--body1 {
+.admin-login-page .mud-typography--body1 {
     font-size: 1rem;
 }
 
 /* Form Elements */
-input[type="text"],
-input[type="password"] {
+.admin-login-page input[type="text"],
+.admin-login-page input[type="password"] {
     width: 100%;
     padding: 12px;
     margin-bottom: 12px;
@@ -95,14 +93,14 @@ input[type="password"] {
     transition: border-color 0.3s;
 }
 
-input[type="text"]:focus,
-input[type="password"]:focus {
+.admin-login-page input[type="text"]:focus,
+.admin-login-page input[type="password"]:focus {
     outline: none;
     border-color: #1976d2;
     box-shadow: 0 0 0 3px rgba(25, 118, 210, 0.1);
 }
 
-label {
+.admin-login-page label {
     display: block;
     margin-bottom: 6px;
     font-weight: 500;
@@ -110,8 +108,8 @@ label {
     font-size: 0.875rem;
 }
 
-/* MudButton */
-button {
+/* Login button fallback. Do not apply this to all admin buttons. */
+.admin-login-page button {
     width: 100%;
     padding: 12px 24px;
     margin-top: 12px;
@@ -125,17 +123,17 @@ button {
     transition: background-color 0.3s;
 }
 
-button:hover {
+.admin-login-page button:hover {
     background-color: #1565c0;
 }
 
-button:disabled {
+.admin-login-page button:disabled {
     background-color: #bdbdbd;
     cursor: not-allowed;
 }
 
 /* MudAlert */
-.mud-alert {
+.admin-login-page .mud-alert {
     padding: 12px 16px;
     margin-bottom: 16px;
     border-radius: 4px;
@@ -144,23 +142,23 @@ button:disabled {
     color: #c62828;
 }
 
-.mud-alert--error {
+.admin-login-page .mud-alert--error {
     background-color: #ffebee;
     color: #c62828;
 }
 
-.mud-alert--success {
+.admin-login-page .mud-alert--success {
     background-color: #e8f5e9;
     color: #2e7d32;
 }
 
-.mud-alert--info {
+.admin-login-page .mud-alert--info {
     background-color: #e3f2fd;
     color: #1565c0;
 }
 
 /* Progress Circle */
-.mud-progress-circular {
+.admin-login-page .mud-progress-circular {
     display: inline-block;
 }
 
@@ -206,12 +204,12 @@ button:disabled {
 
 /* Responsive */
 @media (max-width: 600px) {
-    .mud-container-maxwidth-small {
+    .admin-login-page.mud-container-maxwidth-small {
         max-width: 100% !important;
         padding: 16px;
     }
 
-    .mud-typography--h4 {
+    .admin-login-page .mud-typography--h4 {
         font-size: 1.5rem;
     }
 }