diff --git a/frontend/src/App.css b/frontend/src/App.css
index 7440c9f..501b6e0 100644
--- a/frontend/src/App.css
+++ b/frontend/src/App.css
@@ -233,18 +233,22 @@
   flex-wrap: nowrap;
   overflow-x: auto;
   padding-bottom: 2px; /* to avoid cutting off focus outline */
+  /* Ensure dropdowns are not covered by following content (e.g., tables) */
+  position: relative;
+  z-index: 2500;
 }
 .header-actions .btn-group {
   display: flex;
-  align-items: center;
+  align-items: stretch;
   gap: 0.5rem;
 }
-.header-actions .btn-group .btn-group { gap: 0; }
-.header-actions .btn-group .dropdown-toggle-split { padding-left: .5rem; padding-right: .5rem; }
+.header-actions .btn-group .btn-group { gap: 0; align-items: stretch; }
+.header-actions .btn-group .dropdown-toggle-split { padding-left: .5rem; padding-right: .5rem; display: inline-flex; align-items: center; height: 100%; }
 .header-actions .btn {
   display: inline-flex;
   align-items: center;
   white-space: nowrap;
+  height: 100%;
 }
 .header-actions .btn svg { width: 18px; height: 18px; }