diff --git a/frontend/src/components/ui/DesignSystemStyles.astro b/frontend/src/components/ui/DesignSystemStyles.astro
index 286ddcc..7cbb2be 100644
--- a/frontend/src/components/ui/DesignSystemStyles.astro
+++ b/frontend/src/components/ui/DesignSystemStyles.astro
@@ -144,7 +144,7 @@
     font: inherit;
   }
 
-  :where(input, textarea, select) {
+  :where(input:not([type="checkbox"]):not([type="radio"]), textarea, select) {
     background: var(--color-field-bg);
     color: var(--color-text);
     border: 1px solid var(--color-border);
@@ -153,21 +153,21 @@
     transition: border-color var(--motion-fast) var(--easing-standard), background-color var(--motion-fast) var(--easing-standard);
   }
 
-  :where(input, textarea, select)::placeholder {
+  :where(input:not([type="checkbox"]):not([type="radio"]), textarea, select)::placeholder {
     color: var(--color-text-muted);
     opacity: 0.9;
   }
 
-  :where(input, textarea, select):disabled {
+  :where(input:not([type="checkbox"]):not([type="radio"]), textarea, select):disabled {
     opacity: 0.6;
     cursor: not-allowed;
   }
 
-  :where(input, textarea, select):hover {
+  :where(input:not([type="checkbox"]):not([type="radio"]), textarea, select):hover {
     border-color: var(--color-border-hover);
   }
 
-  :where(input, textarea, select):focus {
+  :where(input:not([type="checkbox"]):not([type="radio"]), textarea, select):focus {
     outline: none;
     border-color: var(--color-primary);
   }
diff --git a/frontend/src/pages/admin/invitations.astro b/frontend/src/pages/admin/invitations.astro
index 83afbe5..e04054d 100644
--- a/frontend/src/pages/admin/invitations.astro
+++ b/frontend/src/pages/admin/invitations.astro
@@ -259,17 +259,8 @@ import { API_BASE as apiBase } from '../../lib/api';
     margin-bottom: 1rem;
   }
 
-  .create-form .form-group label {
-    font-size: 0.875rem;
-  }
-
-  .create-form .form-group input {
-    width: 100%;
-    padding: 0.75rem;
-    border: 1px solid var(--color-border);
-    border-radius: 8px;
-    background: var(--color-bg);
-    color: var(--color-text);
+  .filter-label {
+    margin-bottom: 0;
   }