I might approach this differently. If all of the user preferences are going to be in a stylesheet, why not link an external style sheet (generated by a CGI script). That way you can use the same preferences on static content just as you can for dynamic content. 
<link rel='stylesheet' type='text/css' href='/cgi-bin/generate-css.pl'
+>

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In reply to Re: Parsing and Spewing CSS by Fastolfe
in thread Parsing and Spewing CSS by davemabe

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