Hero images for articles

assets/css/main.css

@@ -347,6 +347,12 @@ body:has(#menu-controller:checked) {
   background-position:center;
 }
 
+.single_hero {
+  background-repeat:no-repeat;
+  background-size:cover; 
+  background-position:center;
+}
+
 .thumbnailshadow {
   box-shadow: 5px 5px 20px 1px rgba(0, 0, 0, 0.3);
 }