Dear Hamdy mansour,
Please go to Template Manager, in General tab, chosen option button Disable Responsive. after in Theme tab, check what color be chosen on Template Style. Then please open template-color.css files on folder: yoursite\templates\sj_teen\css.
eg: open file template-yellow.css and add the code bellow in the first line of file.
.container, .navbar-static-top .container, .navbar-fixed-top .container, .navbar-fixed-bottom .container{width:1180px;}
.row-fluid .first[class*="span"]{margin:0px;}
Thanks !