fixes #1817

app/views/layouts/default.html.erb

@@ -19,6 +19,9 @@
   <meta name="enable-auto-complete" content="<%= CurrentUser.user.enable_auto_complete %>">
   <%= auto_discovery_link_tag :atom, posts_path(:format => "atom", :tags => params[:tags]) %>
   <%= stylesheet_link_tag "application", :media => "screen" %>
+  <style>
+    <%= CurrentUser.user.custom_style %>
+  </style>
   <%= javascript_include_tag "application" %>
   <%= raw Danbooru.config.custom_html_header_content %>
   <%= yield :html_header %>

app/views/users/edit.html.erb

@@ -53,7 +53,8 @@
           <label class="text optional" for="user_favorite_tags">Frequent tags</label>
           <textarea id="user_favorite_tags" class="text optional" rows="5" name="user[favorite_tags]" cols="40"><%= raw @user.favorite_tags %></textarea>
           <span class="hint">A list of tags that you use often. They will appear when using the list of Related Tags.</span>
-        </div> 
+        </div>
+        <%= f.input :custom_style, :label => "Custom <a href='http://en.wikipedia.org/wiki/Cascading_Style_Sheets'>CSS</a> style" %>
       </fieldset>
 
       <fieldset id="change-password-section">