diff --git a/src/styles/layout/highlights.css b/src/styles/layout/highlights.css
index af0bbad9..620473ee 100644
--- a/src/styles/layout/highlights.css
+++ b/src/styles/layout/highlights.css
@@ -73,7 +73,7 @@
 .highlight-mode-toggle .mode-btn.active { background: var(--color-primary); color: rgb(255 255 255); /* white */ }
 
 /* Three-level highlight toggles */
-.highlight-level-toggles { display: flex; gap: 0.25rem; padding: 0.25rem; background: rgba(255, 255, 255, 0.05); border-radius: 4px; }
+.highlight-level-toggles { display: flex; gap: 0.25rem; padding: 0.25rem; border-radius: 4px; }
 
 .highlights-loading,
 .highlights-empty { display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 2rem 1rem; color: var(--color-text-secondary); text-align: center; gap: 0.5rem; }