Perhaps you could add this two following lines to danland.info file in your next release.
stylesheets[all] = "style.css"
stylesheets[all] = "local.css"
First line line adds style.css to html output. It works without, but so you could it also rename the style.css file to danland.css or something else.
Second line gives users of your theme an own css file (named local.css), which they can fill with own style option (for example: change font-size of breadcrumb). Your theme should NOT bring its own local.css, because this would override theme users css settings by an update of your theme. After an update of your theme the user's local.css file also overrides with their own css settings.