Add dropdown menu for opening article in other apps

assets/css/themes/default-light.css

@@ -25,10 +25,35 @@ pre code {
   color: #ccc;
 }
 
-p.meta .date {
+main header .meta .date {
   color: #888;
 }
 
-p.meta .name a {
+main header .meta .name a {
   color: #3b3a38;
 }
+
+/* Dropdown menu */
+
+.dropdown-button {
+  background-color: #f5f2eb;
+  color: #3b3a38;
+  border-color: #ccc;
+}
+
+.dropdown-content {
+  background-color: #fff;
+}
+
+.dropdown-content a {
+  color: #3b3a38 !important;
+}
+
+.dropdown-content a:hover {
+  background-color: #f1f1f1;
+}
+
+.dropdown:hover .dropdown-button {
+  background-color: #fff;
+  border-color: #fff;
+}