diff --git a/assets/css/custom.css b/assets/css/custom.css
index 83b0b74..8affd6d 100644
--- a/assets/css/custom.css
+++ b/assets/css/custom.css
@@ -505,6 +505,9 @@ img { filter: none; }
   border-bottom: 1px dotted;
   z-index: 2;
 }
-.lang-switch:hover { color: var(--color-text-primary); border-bottom: 1px solid; }
+/* hover state comes from the shared "main a:hover, footer a:hover,
+   .lang-switch:hover" rule above (invert to black bg + white text) — a
+   second, later rule here used to override just the text color back to
+   dark, leaving black-on-black on hover. */
 /* no static width reservation needed here anymore — syncLangSwitch() (shell.js)
    already hides the toggle the moment a long line would reach it */