How to modify css of TomatoCMS

From TomatoCMS Documentation

You want to quick modify skin or css of TomatoCMS, what do you do?
Location of TomatoCMS css file like this:

TomatoCMS_Directory
|
|___skin
    |
    |___NameOfTemplate
        |
        |___default
            |
            |___default
                |
                |___default.css

You can modify this file in backend section.
Click Extend/Template, click edit link of template you want to modify, css file will be loaded, you can modify and save it easily.