jQuery UI datepicker css

I need to apply custo开发者_运维技巧m style to datepicker. I found http://www.themeroller.com/ but the output css seems too heavy to me.

Can I use datepicker without linking to native styles (ui.datepicker.css or jquery-ui.css) and create css for elements I need to customize only? Or may be I have to make custom css with http://www.themeroller.com/ and than edit it. Which way?

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See http://jqueryui.com/demos/datepicker/#theming for documentation on how to theme the datepicker.