For now 2 css are used (kendo.common.css and kendo.theme_name.css) for whatever widgets are present on the page. Would be nice to have styles for different widgets separated into single css files (as it is in jQueryUI), so that, if I need only a DropDownList on the page, I include something line "kendo.core.css" and "kendo.dropdown.css" and the whole css framework would not be downloaded each time.