diff --git a/frontend/src/App.vue b/frontend/src/App.vue
index 03a1b2a..da49c76 100644
--- a/frontend/src/App.vue
+++ b/frontend/src/App.vue
@@ -308,7 +308,7 @@ body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-
   overflow: hidden;
 }
 
-html.dark .sidebar { background: #020617; }
+:global(html.dark .sidebar) { background: #020617; }
 
 .logo {
   display: flex;
diff --git a/frontend/src/components/LoginPage.vue b/frontend/src/components/LoginPage.vue
index 2640282..d5ae1f6 100644
--- a/frontend/src/components/LoginPage.vue
+++ b/frontend/src/components/LoginPage.vue
@@ -153,7 +153,7 @@ async function submit() {
   padding: 8px 12px;
 }
 
-:global(html.dark) .login-error {
+:global(html.dark .login-error) {
   background: #2A1515;
   border-color: #3D1F1F;
 }