In some occasions, you may want to add your own css styles & scripts to your page/site. So that fortun includes the option to add the custom codes. You can add your custom codes at Fortun/Theme Options/Custom coding
This is an ACE editor and automatically validates css code, also it highlights the selectors & styles with unique color code for easy use. For reference, a simple example of css style is included in the editor. You can add your code below to the existing css.
This also is an ACE editor but it validates js code. you should place your jquery scripts inside the ready function.