diff --git a/src/listing.html b/src/listing.html
index 27c20b6..e91cf9e 100644
--- a/src/listing.html
+++ b/src/listing.html
@@ -16,7 +16,8 @@
   --item-link: initial;
   --link-hover-bg: #DDE;
   --sort: seagreen;
-  --search-bg: background-color: rgba(255, 255, 255, 0.9);
+  --search-bg: rgba(255, 255, 255, 0.9);
+  --thumbnail-bg: var(--odd-child);
 }
 @media (prefers-color-scheme: dark) {
   :root {
@@ -162,6 +163,7 @@
   margin-bottom: 0;
   outline: none;
   background-color: var(--search-bg);
+  border: 1px solid #ddd;
 }
 
 .image-grid {
@@ -186,6 +188,7 @@
   aspect-ratio: 1 / 1;
   background-size: cover;
   background-position: center center;
+  background-color: var(--thumbnail-bg);
 }
 .thumbnail:hover {
   border: 1px solid white;