where does css stylesheet live?

the root directory (same place as your index.php). I think that’s what your question was.

Many thanks! That’s what I needed to know.

Also, you can change the path of your style file in index.php.
<style type=”text/css” media=”screen”>
@import url( <?php echo get_settings(‘siteurl’); ?>/path_of_your_file/your_style.css );
</style>

ooooh !
thanks coolger