I'm using Cmd+S to save webpages in Chrome and for most pages it saves the assets to a folder as well. This usually includes the CSS and images. Thus when you open the local HTML file in Chrome, it'll appear very similar to the original page (tested with articles from The Atlantic, Washington Post, WSJ).
However, for Wikipedia, the CSS seems to be in PHP files and the resulting local HTML file won't render correctly out of the box (there seem to be multiple load.php files, which I suspect to be the problem). Is there a Wikipedia-provided solution? Or alternatively can I fix this CSS with some renaming/editing of the HTML?