collective.css3buttons is a Plone product that brings in the functionality of CSS3 buttons into Zope / Plone.
Add the egg and zcml references to your buildout.cfg:
Enable the stylesheet
If you are using this directly (i.e. within Zope and/or without Plone), you will need to include the css resource file like so:
< style type="text/css" >
< /style >
If this is used under Plone, just activate the product `CSS3 Buttons` under Site Setup > Add-ons.
Add the classes
Just insert the HTML fragments as defined in the [documentation](http://css3buttons.michaelhenriksen.dk) for CSS3 Buttons into your template files.