Dynamic CSS URL

Currently I am using a dynamic template URL using a function as given below in the Routes.

```
.when('/:page', {
templateUrl : function(url) {
return '/static/partials/' + url.page + '/template.html';
},
....
}
```

When I tried the same with CSS, it is unable to find "url"

```
css : function(url) {
return '/static/partials/' + url.page + '/styles.css';
}
```

Is there any chance that we can provide Dynamic CSS URL as mentioned above?