Improve mobile layout, add dl lists, add npub to profile

assets/css/themes/default-light.css

@@ -25,6 +25,10 @@ pre code {
   color: #ccc;
 }
 
+dl dt {
+  color: #888;
+}
+
 main header .meta .date {
   color: #888;
 }
@@ -33,6 +37,10 @@ main header .meta .name a {
   color: #3b3a38;
 }
 
+.profile-page .pubkey {
+  color: #888;
+}
+
 /* Dropdown menu */
 
 .dropdown-button {