diff --git a/assets/css/src/vanilla.css b/assets/css/src/vanilla.css
index f033f78..68063cf 100644
--- a/assets/css/src/vanilla.css
+++ b/assets/css/src/vanilla.css
@@ -16,6 +16,11 @@ picture {
   display: flex !important;
   justify-content: center !important;
   align-items: center !important;
+  transition: background-color 0.3s ease-in-out;
+}
+
+picture.hide {
+  background-color: transparent;
 }
 
 picture img {
diff --git a/assets/dist/style.css b/assets/dist/style.css
index fa25d86..56831f4 100644
--- a/assets/dist/style.css
+++ b/assets/dist/style.css
@@ -505,6 +505,11 @@ picture {
   display: flex !important;
   justify-content: center !important;
   align-items: center !important;
+  transition: background-color 0.3s ease-in-out;
+}
+
+picture.hide {
+  background-color: transparent;
 }
 
 picture img {