@namespace url(http://www.w3.org/1999/xhtml);

@-moz-document url-prefix("http://gihyo.jp/dev/")
, url-prefix(http://gihyo.jp/admin/)
, url-prefix(http://gihyo.jp/lifestyle/)
, url-prefix(http://gihyo.jp/design/){

div#headerBanner01
, div#headerBanner02
, div#secondary
, div#sub
, div#footerContent
, div#topicPath
, div#categoryNavigation
, div#header
, div#AdSenseKeyword
{ display:none !important; }

#main
{ width:505px !important;
 margin:0 auto !important;
 float:none !important; }

*{ background-image:none !important; }

}