All getting rather heated in here. I am with MyBellaVista on this. I always understood it as this. Make a change to the appropriate css file in tmpl_uni/css and it will over ride any css classes with are imported using the import statement. For instance take Deanos box color reference. Go into common.css in the tmpl/css folder and you will see the following:

@import url(../../base/css/common.css);

change the file so it looks like this:

@import url(../../base/css/common.css);
.boxContent see more {
overflow: hidden;
font-size: 11px;
padding: 1px 1px 1px 1px;
background-color: #000;
}

The above statement will over ride the below css statement that was imported via the @import statement

.boxContent {
overflow: hidden;
font-size: 11px;
padding: 1px 1px 1px 1px;
background-color: #fff;
}

The key different being that #000 over rides #fff. Now the background color of pretty much all the boxes in your dolphin system will be changed from white to black.

http://www.codestyle.org/javascript/dom/css/premium/AtImportOverride.shtml