/* general elements */
html,body{margin:0;padding:0}
body{text-align:center;}
div{background:transparent;}

/* layout */
#envelope{text-align:left}
#header{position:relative;overflow:hidden;}
#footer{clear:both}

/*  positions and sizes */
#envelope{padding:0;margin:0 auto;width:981px;} /* 981 = 940 + 41 */ 
#header{padding:0;margin:0px 52px 0px 50px;}/* 981 - 879 = 102 / 2 = 51; 91px logo height */
#content-wrapper{margin:0px 50px 0px 70px;}
#content{float:left;width:460px;x-overflow:hidden;}
#sidebar-wrapper{margin-right:52px;}
#sidebar{float:right;width:340px;}
#extra{float:right;clear:right;width:340px;margin-right:52px;}
#footer{padding:0;margin:0px 52px 0px 50px;border:1px solid silver;}

/* debug & tuning */
#content{x-border:1px solid silver;}