Modifying the style.css file [#794086]

Hello,

I've been trying to modify the style.css file for the Energetic theme but no matter what changes I make they seem to make no difference to the site itself.

For example I've been trying to make the

smaller and also change its position so it appears on the right of the page. This is the code I've used to try to make it do this:

#featured {

	position: relative;
	height: 100px;

	background: url(images/rslcentre.jpg);

}



#featured .block {

	float: right;

	padding-left: 10.0em;

	bottom: 25px;

	width: 469px;

}

No matter what I do the 'featured' id does not change at all.

I don't know if this is my own stupidity or what but any help would be much appreciated.

Thanks.