fix: Thumbnails background (#5058)

* fix

* fix

p/themes/base-theme/frss.css

@@ -1212,10 +1212,14 @@ a.website:hover .favicon {
 
 .flux .item.thumbnail {
 	line-height: 0;
-	padding: 0.75rem;
+	padding: var(--frss-padding-top-bottom) var(--frss-padding-flux-items);
 	height: 80px;
 }
 
+.flux .item.thumbnail .item-element {
+	padding: 0;
+}
+
 .flux .item.thumbnail.small {
 	height: 40px;
 }

p/themes/base-theme/frss.rtl.css

@@ -1212,10 +1212,14 @@ a.website:hover .favicon {
 
 .flux .item.thumbnail {
 	line-height: 0;
-	padding: 0.75rem;
+	padding: var(--frss-padding-top-bottom) var(--frss-padding-flux-items);
 	height: 80px;
 }
 
+.flux .item.thumbnail .item-element {
+	padding: 0;
+}
+
 .flux .item.thumbnail.small {
 	height: 40px;
 }