Added new style for code blocks

boards/static/css/md/base_page.css

@@ -365,4 +365,12 b' li {'
     padding: 0.5ex;
     margin: 0.5ex;
     text-align: center;
-}
  No newline at end of file
+}
+
+code {
+    border: dashed 1px #ccc;
+    background: #111;
+    padding: 2px;
+    font-size: 1.2em;
+    display: inline-block;
+}