diff --git a/frontend/src/styles/components.css b/frontend/src/styles/components.css
index ac60ab8..d56825b 100644
--- a/frontend/src/styles/components.css
+++ b/frontend/src/styles/components.css
@@ -2109,7 +2109,12 @@ tr:focus-within .btn-table-actions {
   display: none;
 }
 
-/* Header: fixed, covers content area only (not sidebar) — glass treatment */
+/* Header: fixed, covers content area only (not sidebar) — glass treatment.
+   Same tint/blur strength as .sidebar so both fixed chrome surfaces read as
+   one consistent glass layer — .header previously used a lighter 0.30 tint
+   than .sidebar's 0.40, which made scrolled content underneath show through
+   almost undimmed and read as "no glass effect" even though backdrop-filter
+   was technically applied. */
 .header {
   position: fixed;
   top: 0;
@@ -2117,10 +2122,11 @@ tr:focus-within .btn-table-actions {
   right: 0;
   height: var(--header-height);
   z-index: var(--z-sticky);
-  background-color: rgba(28, 32, 38, 0.30);
+  background-color: rgba(28, 32, 38, 0.40);
   backdrop-filter: var(--blur-modal);
   -webkit-backdrop-filter: var(--blur-modal);
   border-bottom: 1px solid rgba(70, 69, 84, 0.12);
+  box-shadow: var(--shadow-lg);
   display: flex;
   align-items: center;
   padding: 0 var(--space-6);