Fix reflow of posts on blog index

Author: knolleary

css/blog.css

@@ -134,8 +134,16 @@ blockquote {
 .blog-posts .grid {
     overflow: visible;
 }
+
+@media handheld, only screen and (max-width: 850px) {
+    .blog-posts .post-preview {
+        width:  calc(100% / 2 - 50px);
+        height: 200px;
+    }
+}
+
 @media handheld, only screen and (max-width: 767px) {
-    .post-preview {
+    .blog-posts .post-preview {
         width: calc(100% - 40px);
         height: 200px;
     }