diff --git a/internal/httpapi/static/app.css b/internal/httpapi/static/app.css
index e0c8ea7..0f9977f 100644
--- a/internal/httpapi/static/app.css
+++ b/internal/httpapi/static/app.css
@@ -1,5 +1,5 @@
 body { padding: 0; }
-header.nav { position: sticky; top: 0; z-index: 10; padding: .6rem 1rem; border-bottom: 1px solid var(--muted-border-color); display: flex; justify-content: space-between; align-items: center; }
+header.nav { position: sticky; top: 0; z-index: 10; padding: .6rem 1rem; border-bottom: 1px solid var(--muted-border-color); display: flex; justify-content: space-between; align-items: center; background: var(--background-color); }
 header.nav a.brand { text-decoration: none; font-weight: 600; }
 /* Dashboard-only grid layout */
 .dash { display: grid; grid-template-columns: 220px 1fr; gap: 0; min-height: calc(100vh - 3rem); }