update css for article for small screen

static/css/theme-coko/main.css

@@ -636,9 +636,12 @@ footer section.infos a:hover {
 @media screen and (max-width: 700px) {
   .article-single article {
     display: block;
+    width: 100%;
+    font-size: 0.9em;
   }
   .article-single article p {
     padding: 1em 0;
+    width: 100%;
   }
 }