diff --git a/app/assets/javascripts/admin/models/site_customization.js b/app/assets/javascripts/admin/models/site_customization.js
index 8e90d13cef7..71143b89683 100644
--- a/app/assets/javascripts/admin/models/site_customization.js
+++ b/app/assets/javascripts/admin/models/site_customization.js
@@ -7,7 +7,7 @@
   @module Discourse
 **/
 Discourse.SiteCustomization = Discourse.Model.extend({
-  trackedProperties: ['enabled', 'name', 'stylesheet', 'header', 'override_default_style'],
+  trackedProperties: ['enabled', 'name', 'stylesheet', 'header', 'mobile_stylesheet', 'mobile_header', 'override_default_style'],
 
   init: function() {
     this._super();
@@ -33,7 +33,7 @@ Discourse.SiteCustomization = Discourse.Model.extend({
 
     return changed;
 
-  }.property('override_default_style', 'enabled', 'name', 'stylesheet', 'header', 'originals'),
+  }.property('override_default_style', 'enabled', 'name', 'stylesheet', 'header', 'mobile_stylesheet', 'mobile_header', 'originals'),
 
   startTrackingChanges: function() {
     var _this = this;
@@ -62,6 +62,8 @@ Discourse.SiteCustomization = Discourse.Model.extend({
       enabled: this.enabled,
       stylesheet: this.stylesheet,
       header: this.header,
+      mobile_stylesheet: this.mobile_stylesheet,
+      mobile_header: this.mobile_header,
       override_default_style: this.override_default_style
     };
 
diff --git a/app/assets/javascripts/admin/templates/customize.js.handlebars b/app/assets/javascripts/admin/templates/customize.js.handlebars
index 6a32ccee663..44b1307b9b4 100644
--- a/app/assets/javascripts/admin/templates/customize.js.handlebars
+++ b/app/assets/javascripts/admin/templates/customize.js.handlebars
@@ -12,25 +12,38 @@
 
 {{#if selectedItem}}
 <div class='current-style'>
-  <div class='admin-controls'>
-    <ul class="nav nav-pills">
-      <li {{bindAttr class="view.stylesheetActive:active"}}>
-        <a {{action selectStylesheet href="true" target="view"}}>{{i18n admin.customize.css}}</a>
-      </li>
-      <li {{bindAttr class="view.headerActive:active"}}>
-        <a {{action selectHeader href="true" target="view"}}>{{i18n admin.customize.header}}</a>
-      </li>
-    </ul>
-  </div>
-
   {{#with selectedItem}}
     {{textField class="style-name" value=name}}
+
+    <div class='admin-controls'>
+      <ul class="nav nav-pills">
+        <li {{bindAttr class="view.stylesheetActive:active"}}>
+          <a {{action selectStylesheet href="true" target="view"}}>{{i18n admin.customize.css}}</a>
+        </li>
+        <li {{bindAttr class="view.headerActive:active"}}>
+          <a {{action selectHeader href="true" target="view"}}>{{i18n admin.customize.header}}</a>
+        </li>
+        <li {{bindAttr class="view.mobileStylesheetActive:active"}}>
+          <a {{action selectMobileStylesheet href="true" target="view"}}>{{i18n admin.customize.mobile_css}}</a>
+        </li>
+        <li {{bindAttr class="view.mobileHeaderActive:active"}}>
+          <a {{action selectMobileHeader href="true" target="view"}}>{{i18n admin.customize.mobile_header}}</a>
+        </li>
+      </ul>
+    </div>
+
     {{#if view.headerActive}}
       {{aceEditor content=header mode="html"}}
     {{/if}}
     {{#if view.stylesheetActive}}
       {{aceEditor content=stylesheet mode="scss"}}
     {{/if}}
+    {{#if view.mobileHeaderActive}}
+      {{aceEditor content=mobile_header mode="html"}}
+    {{/if}}
+    {{#if view.mobileStylesheetActive}}
+      {{aceEditor content=mobile_stylesheet mode="scss"}}
+    {{/if}}
   {{/with}}
   <br>
   <div class='status-actions'>
diff --git a/app/assets/javascripts/admin/views/admin_customize_view.js b/app/assets/javascripts/admin/views/admin_customize_view.js
index a030d43244b..31761233661 100644
--- a/app/assets/javascripts/admin/views/admin_customize_view.js
+++ b/app/assets/javascripts/admin/views/admin_customize_view.js
@@ -11,20 +11,16 @@
 Discourse.AdminCustomizeView = Discourse.View.extend({
   templateName: 'admin/templates/customize',
   classNames: ['customize'],
+  headerActive: Ember.computed.equal('selected', 'header'),
+  stylesheetActive: Ember.computed.equal('selected', 'stylesheet'),
+  mobileHeaderActive: Ember.computed.equal('selected', 'mobileHeader'),
+  mobileStylesheetActive: Ember.computed.equal('selected', 'mobileStylesheet'),
 
   init: function() {
     this._super();
     this.set('selected', 'stylesheet');
   },
 
-  headerActive: (function() {
-    return this.get('selected') === 'header';
-  }).property('selected'),
-
-  stylesheetActive: (function() {
-    return this.get('selected') === 'stylesheet';
-  }).property('selected'),
-
   selectHeader: function() {
     this.set('selected', 'header');
   },
@@ -33,6 +29,14 @@ Discourse.AdminCustomizeView = Discourse.View.extend({
     this.set('selected', 'stylesheet');
   },
 
+  selectMobileHeader: function() {
+    this.set('selected', 'mobileHeader');
+  },
+
+  selectMobileStylesheet: function() {
+    this.set('selected', 'mobileStylesheet');
+  },
+
   didInsertElement: function() {
     var controller = this.get('controller');
     return Mousetrap.bindGlobal(['meta+s', 'ctrl+s'], function() {
diff --git a/app/controllers/admin/site_customizations_controller.rb b/app/controllers/admin/site_customizations_controller.rb
index 855b947bd9b..d2595a3f11c 100644
--- a/app/controllers/admin/site_customizations_controller.rb
+++ b/app/controllers/admin/site_customizations_controller.rb
@@ -49,7 +49,7 @@ class Admin::SiteCustomizationsController < Admin::AdminController
   private
 
     def site_customization_params
-      params.require(:site_customization).permit(:name, :stylesheet, :header, :position, :enabled, :key, :override_default_style, :stylesheet_baked)
+      params.require(:site_customization).permit(:name, :stylesheet, :header, :mobile_stylesheet, :mobile_header, :position, :enabled, :key, :override_default_style, :stylesheet_baked)
     end
 
     def log_site_customization_change(old_record, new_params)
diff --git a/app/models/site_customization.rb b/app/models/site_customization.rb
index 40814ea7917..c52eb4841e9 100644
--- a/app/models/site_customization.rb
+++ b/app/models/site_customization.rb
@@ -12,31 +12,35 @@ class SiteCustomization < ActiveRecord::Base
   end
 
   before_save do
-    if stylesheet_changed?
-      begin
-        self.stylesheet_baked = Sass.compile stylesheet
-      rescue Sass::SyntaxError => e
-        error = e.sass_backtrace_str("custom stylesheet")
-        error.gsub!("\n", '\A ')
-        error.gsub!("'", '\27 ')
+    ['stylesheet', 'mobile_stylesheet'].each do |stylesheet_attr|
+      if self.send("#{stylesheet_attr}_changed?")
+        begin
+          self.send("#{stylesheet_attr}_baked=", Sass.compile(self.send(stylesheet_attr)))
+        rescue Sass::SyntaxError => e
+          error = e.sass_backtrace_str("custom stylesheet")
+          error.gsub!("\n", '\A ')
+          error.gsub!("'", '\27 ')
 
-        self.stylesheet_baked =
-"#main {display: none;}
-footer {white-space: pre; margin-left: 100px;}
-footer:after{ content: '#{error}' }"
+          self.send("#{stylesheet_attr}_baked=",
+  "#main {display: none;}
+  footer {white-space: pre; margin-left: 100px;}
+  footer:after{ content: '#{error}' }")
+        end
       end
     end
   end
 
   after_save do
     if stylesheet_changed?
-      if File.exists?(stylesheet_fullpath)
-        File.delete stylesheet_fullpath
-      end
+      File.delete(stylesheet_fullpath) if File.exists?(stylesheet_fullpath)
+    end
+    if mobile_stylesheet_changed?
+      File.delete(stylesheet_fullpath(:mobile)) if File.exists?(stylesheet_fullpath(:mobile))
     end
     remove_from_cache!
-    if stylesheet_changed?
-      ensure_stylesheet_on_disk!
+    if stylesheet_changed? or mobile_stylesheet_changed?
+      ensure_stylesheets_on_disk!
+      # TODO: this is broken now because there's mobile stuff too
       MessageBus.publish "/file-change/#{key}", stylesheet_hash
     end
     MessageBus.publish "/header-change/#{key}", header if header_changed?
@@ -47,6 +51,9 @@ footer:after{ content: '#{error}' }"
     if File.exists?(stylesheet_fullpath)
       File.delete stylesheet_fullpath
     end
+    if File.exists?(stylesheet_fullpath(:mobile))
+      File.delete stylesheet_fullpath(:mobile)
+    end
     self.remove_from_cache!
   end
 
@@ -71,17 +78,17 @@ footer:after{ content: '#{error}' }"
     end
   end
 
-  def self.custom_stylesheet(preview_style)
+  def self.custom_stylesheet(preview_style, target=:desktop)
     preview_style ||= enabled_style_key
     style = lookup_style(preview_style)
-    style.stylesheet_link_tag.html_safe if style
+    style.stylesheet_link_tag(target).html_safe if style
   end
 
-  def self.custom_header(preview_style)
+  def self.custom_header(preview_style, target=:desktop)
     preview_style ||= enabled_style_key
     style = lookup_style(preview_style)
-    if style && style.header
-      style.header.html_safe
+    if style && ((target == :mobile && style.mobile_header) || style.header)
+      target == :mobile ? style.mobile_header.html_safe : style.header.html_safe
     else
       ""
     end
@@ -104,7 +111,7 @@ footer:after{ content: '#{error}' }"
 
     @lock.synchronize do
       style = where(key: key).first
-      style.ensure_stylesheet_on_disk! if style
+      style.ensure_stylesheets_on_disk! if style
       @cache[key] = style
     end
   end
@@ -135,39 +142,49 @@ footer:after{ content: '#{error}' }"
     self.class.remove_from_cache!(key)
   end
 
-  def stylesheet_hash
-    Digest::MD5.hexdigest(stylesheet)
+  def stylesheet_hash(target=:desktop)
+    Digest::MD5.hexdigest( target == :mobile ? mobile_stylesheet : stylesheet )
   end
 
   def cache_fullpath
     "#{Rails.root}/public/#{CACHE_PATH}"
   end
 
-  def ensure_stylesheet_on_disk!
-    path = stylesheet_fullpath
-    dir = cache_fullpath
-    FileUtils.mkdir_p(dir)
-    unless File.exists?(path)
-      File.open(path, "w") do |f|
-        f.puts stylesheet_baked
+  def ensure_stylesheets_on_disk!
+    [[:desktop, 'stylesheet_baked'], [:mobile, 'mobile_stylesheet_baked']].each do |target, baked_attr|
+      path = stylesheet_fullpath(target)
+      dir = cache_fullpath
+      FileUtils.mkdir_p(dir)
+      unless File.exists?(path)
+        File.open(path, "w") do |f|
+          f.puts self.send(baked_attr)
+        end
       end
     end
   end
 
-  def stylesheet_filename
-    "/#{self.key}.css"
+  def stylesheet_filename(target=:desktop)
+    target == :desktop ? "/#{self.key}.css" : "/#{target}_#{self.key}.css"
   end
 
-  def stylesheet_fullpath
-    "#{cache_fullpath}#{stylesheet_filename}"
+  def stylesheet_fullpath(target=:desktop)
+    "#{cache_fullpath}#{stylesheet_filename(target)}"
   end
 
-  def stylesheet_link_tag
+  def stylesheet_link_tag(target=:desktop)
+    return mobile_stylesheet_link_tag if target == :mobile
     return "" unless stylesheet.present?
     return @stylesheet_link_tag if @stylesheet_link_tag
-    ensure_stylesheet_on_disk!
+    ensure_stylesheets_on_disk!
     @stylesheet_link_tag = "<link class=\"custom-css\" rel=\"stylesheet\" href=\"/#{CACHE_PATH}#{stylesheet_filename}?#{stylesheet_hash}\" type=\"text/css\" media=\"screen\">"
   end
+
+  def mobile_stylesheet_link_tag
+    return "" unless mobile_stylesheet.present?
+    return @mobile_stylesheet_link_tag if @mobile_stylesheet_link_tag
+    ensure_stylesheets_on_disk!
+    @mobile_stylesheet_link_tag = "<link class=\"custom-css\" rel=\"stylesheet\" href=\"/#{CACHE_PATH}#{stylesheet_filename(:mobile)}?#{stylesheet_hash(:mobile)}\" type=\"text/css\" media=\"screen\">"
+  end
 end
 
 # == Schema Information
diff --git a/app/views/common/_discourse_stylesheet.html.erb b/app/views/common/_discourse_stylesheet.html.erb
index 168617f6ae5..460ef7a2436 100644
--- a/app/views/common/_discourse_stylesheet.html.erb
+++ b/app/views/common/_discourse_stylesheet.html.erb
@@ -10,6 +10,4 @@
   <%= stylesheet_link_tag "admin"%>
 <%-end%>
 
-<% unless mobile_view? %>
-  <%= SiteCustomization.custom_stylesheet(session[:preview_style]) %>
-<% end %>
+<%= SiteCustomization.custom_stylesheet(session[:preview_style], mobile_view? ? :mobile : :desktop) %>
diff --git a/app/views/layouts/application.html.erb b/app/views/layouts/application.html.erb
index d47df7d539b..473ac8ab129 100644
--- a/app/views/layouts/application.html.erb
+++ b/app/views/layouts/application.html.erb
@@ -30,9 +30,7 @@
   <body>
     <!--[if IE 9]><script type="text/javascript">ie = "new";</script><![endif]-->
 
-    <% unless mobile_view? %>
-      <%= SiteCustomization.custom_header(session[:preview_style]) %>
-    <% end %>
+    <%= SiteCustomization.custom_header(session[:preview_style], mobile_view? ? :mobile : :desktop) %>
     <section id='main'>
     </section>
 
diff --git a/config/locales/client.en.yml b/config/locales/client.en.yml
index a255634273e..47a5ac557ff 100644
--- a/config/locales/client.en.yml
+++ b/config/locales/client.en.yml
@@ -1166,6 +1166,8 @@ en:
         long_title: "Site Customizations"
         header: "Header"
         css: "Stylesheet"
+        mobile_header: "Mobile Header"
+        mobile_css: "Mobile Stylesheet"
         override_default: "Do not include standard style sheet"
         enabled: "Enabled?"
         preview: "preview"
diff --git a/db/migrate/20130913210454_add_mobile_to_site_customizations.rb b/db/migrate/20130913210454_add_mobile_to_site_customizations.rb
new file mode 100644
index 00000000000..681788ce6e1
--- /dev/null
+++ b/db/migrate/20130913210454_add_mobile_to_site_customizations.rb
@@ -0,0 +1,7 @@
+class AddMobileToSiteCustomizations < ActiveRecord::Migration
+  def change
+    add_column :site_customizations, :mobile_stylesheet, :text
+    add_column :site_customizations, :mobile_header, :text
+    add_column :site_customizations, :mobile_stylesheet_baked, :text
+  end
+end
diff --git a/spec/models/site_customization_spec.rb b/spec/models/site_customization_spec.rb
index f602b1c7621..e40dc9d7e22 100644
--- a/spec/models/site_customization_spec.rb
+++ b/spec/models/site_customization_spec.rb
@@ -6,8 +6,16 @@ describe SiteCustomization do
     Fabricate(:user)
   end
 
+  let :customization_params do
+    {name: 'my name', user_id: user.id, header: "my awesome header", stylesheet: "my awesome css", mobile_stylesheet: '', mobile_header: ''}
+  end
+
   let :customization do
-    SiteCustomization.create!(name: 'my name', user_id: user.id, header: "my awesome header", stylesheet: "my awesome css")
+    SiteCustomization.create!(customization_params)
+  end
+
+  let :customization_with_mobile do
+    SiteCustomization.create!(customization_params.merge(mobile_stylesheet: ".mobile {better: true;}", mobile_header: "fancy mobile stuff"))
   end
 
   it 'should set default key when creating a new customization' do
@@ -50,15 +58,46 @@ describe SiteCustomization do
       c = customization
       c.remove_from_cache!
       File.delete(c.stylesheet_fullpath)
+      File.delete(c.stylesheet_fullpath(:mobile))
 
       SiteCustomization.custom_stylesheet(c.key)
       File.exists?(c.stylesheet_fullpath).should == true
-
+      File.exists?(c.stylesheet_fullpath(:mobile)).should == true
     end
 
-    it 'should allow me to lookup a filename containing my preview stylesheet' do
-      SiteCustomization.custom_stylesheet(customization.key).should ==
-        "<link class=\"custom-css\" rel=\"stylesheet\" href=\"/uploads/stylesheet-cache/#{customization.key}.css?#{customization.stylesheet_hash}\" type=\"text/css\" media=\"screen\">"
+    context '#custom_stylesheet' do
+      it 'should allow me to lookup a filename containing my preview stylesheet' do
+        SiteCustomization.custom_stylesheet(customization.key).should ==
+          "<link class=\"custom-css\" rel=\"stylesheet\" href=\"/uploads/stylesheet-cache/#{customization.key}.css?#{customization.stylesheet_hash}\" type=\"text/css\" media=\"screen\">"
+      end
+
+      it "should return blank link tag for mobile if mobile_stylesheet is blank" do
+        SiteCustomization.custom_stylesheet(customization.key, :mobile).should == ""
+      end
+
+      it "should return link tag for mobile custom stylesheet" do
+        SiteCustomization.custom_stylesheet(customization_with_mobile.key, :mobile).should ==
+          "<link class=\"custom-css\" rel=\"stylesheet\" href=\"/uploads/stylesheet-cache/mobile_#{customization_with_mobile.key}.css?#{customization_with_mobile.stylesheet_hash(:mobile)}\" type=\"text/css\" media=\"screen\">"
+      end
+    end
+
+    context '#custom_header' do
+      it "returns empty string when there is no custom header" do
+        c = SiteCustomization.create!(customization_params.merge(header: ''))
+        SiteCustomization.custom_header(c.key).should == ''
+      end
+
+      it "can return the custom header html" do
+        SiteCustomization.custom_header(customization.key).should == customization_params[:header]
+      end
+
+      it "returns empty string for mobile header when there's no custom mobile header" do
+        SiteCustomization.custom_header(customization.key, :mobile).should == ''
+      end
+
+      it "can return the custom mobile header html" do
+        SiteCustomization.custom_header(customization_with_mobile.key, :mobile).should == customization_with_mobile.mobile_header
+      end
     end
 
     it 'should fix stylesheet files after changing the stylesheet' do
@@ -72,13 +111,31 @@ describe SiteCustomization do
       SiteCustomization.custom_stylesheet(customization.key).should_not == original
     end
 
+    it 'should fix mobile stylesheet files after changing the mobile_stylesheet' do
+      old_file = customization_with_mobile.stylesheet_fullpath(:mobile)
+      original = SiteCustomization.custom_stylesheet(customization_with_mobile.key, :mobile)
+
+      File.exists?(old_file).should == true
+      customization_with_mobile.mobile_stylesheet = "div { clear:both; }"
+      customization_with_mobile.save
+
+      SiteCustomization.custom_stylesheet(customization_with_mobile.key).should_not == original
+    end
+
     it 'should delete old stylesheet files after deleting' do
       old_file = customization.stylesheet_fullpath
-      customization.ensure_stylesheet_on_disk!
+      customization.ensure_stylesheets_on_disk!
       customization.destroy
       File.exists?(old_file).should == false
     end
 
+    it 'should delete old mobile stylesheet files after deleting' do
+      old_file = customization_with_mobile.stylesheet_fullpath(:mobile)
+      customization_with_mobile.ensure_stylesheets_on_disk!
+      customization_with_mobile.destroy
+      File.exists?(old_file).should == false
+    end
+
     it 'should nuke old revs out of the cache' do
       old_style = SiteCustomization.custom_stylesheet(customization.key)
 
@@ -87,16 +144,35 @@ describe SiteCustomization do
       SiteCustomization.custom_stylesheet(customization.key).should_not == old_style
     end
 
+    it 'should nuke old revs out of the cache for mobile too' do
+      old_style = SiteCustomization.custom_stylesheet(customization_with_mobile.key)
+
+      customization_with_mobile.mobile_stylesheet = "hello worldz"
+      customization_with_mobile.save
+      SiteCustomization.custom_stylesheet(customization.key, :mobile).should_not == old_style
+    end
+
 
     it 'should compile scss' do
       c = SiteCustomization.create!(user_id: user.id, name: "test", stylesheet: '$black: #000; #a { color: $black; }', header: '')
       c.stylesheet_baked.should == "#a {\n  color: black; }\n"
     end
 
+    it 'should compile mobile scss' do
+      c = SiteCustomization.create!(user_id: user.id, name: "test", stylesheet: '', header: '', mobile_stylesheet: '$black: #000; #a { color: $black; }', mobile_header: '')
+      c.mobile_stylesheet_baked.should == "#a {\n  color: black; }\n"
+    end
+
     it 'should provide an awesome error on failure' do
       c = SiteCustomization.create!(user_id: user.id, name: "test", stylesheet: "$black: #000; #a { color: $black; }\n\n\nboom", header: '')
-
       c.stylesheet_baked.should =~ /Syntax error/
+      c.mobile_stylesheet_baked.should_not be_present
+    end
+
+    it 'should provide an awesome error on failure for mobile too' do
+      c = SiteCustomization.create!(user_id: user.id, name: "test", stylesheet: '', header: '', mobile_stylesheet: "$black: #000; #a { color: $black; }\n\n\nboom", mobile_header: '')
+      c.mobile_stylesheet_baked.should =~ /Syntax error/
+      c.stylesheet_baked.should_not be_present
     end
 
   end