adding css in fresh.css nothing change is made I'm using sub theme zenophile and created sub theme and now in my own sub theme I added some css rules in fresh.css but it's changing nothing.

I did clean refresh, but nothing happening...
You need to tell your theme to pickup your css file.. You can do that using .info file of theme using below code..

stylesheets[all][] = fresh.css


Clear Drupal Cache to see changes...

For more information refer Writing theme.info files...