[Plugin: Random Posts from Category] problems styleing widget_random_from_cat

with all my other widgets I can add space at the bottom of the displayed items with code like

<div.widget.widget_random_from_cat ul li {
margin-bottom: 1px;
}

I noticed that there isn’t a in the source–is that the problem? I tried sticking one in here in the edit plugin screen but it still doesn’t display

<li><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a>
                <?php
				if ($instance['content'] == 'excerpt') {
					if (function_exists('the_excerpt_reloaded'))
						the_excerpt_reloaded($instance['words'], $instance['tags'], 'content', FALSE, '', '', '1', '');
					else the_excerpt();  // this covers Advanced Excerpt as well as the built-in one
				}
				if ($instance['content'] == 'content') the_content();
			endwhile; endif;
			?></li>
			</ul>

any suggestions?

Thanks