The core look of Tobar Segais is based on Twitter Bootstrap. Any custom full build of Bootstrap 2.0.x should work as a drop in replacement that offers the customized look and feel.
Assuming you are building your Tobar Segais web application using the technique described in Chapter 2 all you need do is create the file
src/main/webapp/css/bootstrap.min.css containing the minified version of your custom build of Twitter Bootstrap.
If you have customized versions of the Glyph Icons, these should be put at the paths
If you just want to apply some simple tweaks to the CSS after Twitter Bootstrap is loaded all you need to do is create the file
src/main/webapp/css/custom.css this file is included after all the other CSS files have been included.