You can see the styles added to a page with this tool: http://css.benjaminbenben.com/
Please only load the CSS when page-list is active on a page, not on all pages.
CSS styles are loaded only first time. All next times browser use cached file. And css file is very small.
And I also does not know where to load css styles, because I don't know how to check if there is a shortcode used on that page. Shortcode also can be used in widgets or in template files too.
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