Hello Michael. I have noticed that my css files contain all code twice *Handler: * *getApplicationFrameR :: Handler RepHtml* *getApplicationFrameR = do* * defaultLayout $ do* * setTitle "Помогай"* * addJulius $(juliusFile "application")* * addScript JsApiR* * addCassius $(cassiusFile "application-frame")* * addWidget $(widgetFile "application-frame")* * * *Cassius: (application-frame.cassius):* * div#header color: red div#content color: green * *css output from browser:* div#header{color:red}div#content{color:green}div#header{color:red}div# content{color:green}body{font-family:sans-serif} The Lucius behavior is the same. What do i make wrong ? Thanks. -- Best regards, Cheshkov Anton Phone: +7 909 005 18 82 Skype: cheshkov_anton