Make feature image have consistent 21:9 aspect ratio

assets/css/screen.css

@@ -700,6 +700,8 @@ instead of pages ".mind-page*".
 
 img.mind-post_feature-image {
     width: 100%;
+    object-fit: cover;
+    max-height: 360px; /* 21:9 aspect ratio */
     /*
     TODO: see .mind-post_content-header.
 
@@ -1211,6 +1213,10 @@ Media queries are used to make the website responsive and cool on mobile.
         font-size: 17px;
     }
 
+    img.mind-post_feature-image {
+        max-height: 29vw; /* 21:9 aspect ratio */
+    }
+
     .kg-gallery-image {
         margin: 10px 10px;
     }
@@ -1287,6 +1293,10 @@ Media queries are used to make the website responsive and cool on mobile.
         padding: 0 20px;
     }
 
+    img.mind-post_feature-image {
+        max-height: 42.857vw; /* 21:9 aspect ratio */
+    }
+
     .kg-gallery-image {
         margin: 10px 5px;
     }