Почему не применяются стили?

.header {
	background-color: darkslateblue;
	height: 177px;
	font-size: 0.8em;
	margin-left: 0px;
	margin-right: 0px;
	min-width: 900px;
}
.main, .logo, .menubar, .site_content, .footer{
	margin-right: auto;
	margin-left: auto;
}

.logo{
	width: 880px;
	padding-bottom: 40px;
} 

.logo h1, .logo h2 {
	font: normal 300% 'century gothic', arial, sans-serif;
	margin: 0 0 0 9px;
}

.logo_text h1, .logo_text h1 a, .logo_text h1 a:hover{
	padding: 22px 0 0 0;
	color: #fff;
	letter-spacing: 0.1em;
	text-decoration: none;
} 

.logo_text h2 {
	font-size: 0.9em;
	padding: 4px 0 0 0;
	color: #999;
}

.menubar {
	width: 900px;
	height: 46px;
}

ul .menu {
	float: right;
}
ul .menu li {
	float: left;
	padding: 0 0 0 9px;
	list-style: none;
	margin: 1px 2px 0 0;
}
ul .menu li a{
	font: normal 100% 'trebuchet ms', sans-serif;
	display: block;
	height: 20px;
	padding: 6px 35px 5px 28px;
	color: #fff;
	text-decoration: none;
}
ul.menu li.selected a {
	color: #aeb002;
}
ul .menu li a:hover {
	color:e4ec04;
}