diff --git a/libretranslate/static/css/main.css b/libretranslate/static/css/main.css
index 862153a..1d5ac64 100644
--- a/libretranslate/static/css/main.css
+++ b/libretranslate/static/css/main.css
@@ -436,7 +436,7 @@ code[class*="language-"], pre[class*="language-"] {
   background-color: var(--pri-bg-color);
 }
 
-.card-stacked {
+.card-stacked, .card-stacked .card-content {
   background-color: var(--sec-bg-color)
 }