[#847] Add some links to some CSS tools

doc/theming/css.rst

@@ -2,6 +2,27 @@
 Customizing CKAN's CSS
 ======================
 
+.. seealso::
+
+   There's nothing special about CSS in CKAN, once you've got started with
+   editing CSS in CKAN (by following the tutorial below), then you just use the
+   usual tools and techniques to explore and hack the CSS. We recommend using
+   your browser's web development tools to explore and experiment with the CSS,
+   then using any good text editor to edit your extension's CSS files as
+   needed. For example:
+
+   `Firefox developer tools <https://developer.mozilla.org/en-US/docs/Tools>`_
+     These include a Page Inspector and a Style Editor
+
+   `Firebug <https://www.getfirebug.com/>`_
+     Another web development toolkit for Firefox
+
+   `Chrome developer tools <https://developers.google.com/chrome-developer-tools/>`_
+     Tools for inspecting and editing CSS in Google Chrome
+
+   `Mozilla Developer Network's CSS section <https://developer.mozilla.org/en-US/docs/Web/CSS>`_
+     A good collection of CSS documentation and tutorials
+
 Extensions can add their own CSS files to modify or extend CKAN's default CSS.
 Create an ``example_theme.css`` file in your extension's ``public`` directory::
 
@@ -46,16 +67,7 @@ and you should see the background color of the account masthead change:
 This custom color should appear on all pages of your CKAN site.
 
 Now that we have CKAN using our CSS file, we can add more CSS rules to the file
-and customize CKAN's CSS as much as we want. There's nothing special about CSS
-in CKAN, you just use the usual tools and techniques to explore and hack the
-CSS.
-
-.. todo:: Link to some tools?
-
-   e.g. Firefox inspector etc (or Chrome? Firebug?)
-
-   e.g. Some online CSS reference.
-
+and customize CKAN's CSS as much as we want.
 Let's add a bit more code to our ``example_theme.css`` file. This CSS
 implements a partial imitation of the `datahub.io <http://datahub.io/>`_ theme
 (circa 2013):