Почему из урока 62 по html панель главная и т.д невидно?

* {
margin:0;
padding:0;
}

body {
font-size: 1.2em;
background-color: #fff;
color: #555;
}

p {
padding: 0 0 20px 0;
line-height: 1.7em;
}

input[type="text"], input[type="email"], input[type="password"], input[type="search"] {
color: #5d5d5d;
width: 60%;
padding: 8px;
}

input, textarea {
outline: none;
border: none;
border: solid 1px #f2f2f2;
}

h1, h2 {
font: normal 170% "century gothic", arial;
margin: 0 0 15px 0;
padding: 15px 0 5px 0;
color: #000;
}
h2 {
font-size: 140%;
}

a, a:hover {
outline: none;
text-decoration: underline;
color: #aeb002;

}

ul {
margin: 2px 0 22px 17px;
}

ul li {
margin: 0 0 6px 0;
padding: 0 0 4px 5px;
line-height: 1.5em;
}

.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-left: auto;
margin-right: 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;
}

hr {
border: solid 1px #f3f3f3;
}

.site_content {
width: 880px;
overflow: hidden;
margin: 20px auto 0 auto;
background-color: white;
}

.sidebar_container {
float: right;
width: 224px;
}

.sidebar {
float: right;
width: 220px;
padding: 5%;
margin: 0 0 16px 0;
border: solid 1px #f2f2f2;
border-radius: 5px;
background-color: #f9f9f9;
}

.btn {
padding: 8px;
background-color: white;
cursor: pointer;
}

.sidebar h2 {
color: #136bc2;
}

.lables_passreg_text {
font-size: 0.7em;
margin-top: 3%;
margin-left: 2%;
}

.sidebar ul {
margin: 0;
}

.sidebar ul li {
list-style-type: none;
margin: 0 0 0 0;
list-style:none;
}

.sidebar .rating_sidebar {
float: right;
}

.content {
text-align: left;
width: 620px;
padding: 0 0 0 5px;
float: left;
}

.content a {
text-decoration: none;
}

.films_block {
margin-bottom: 5%;
}

.films_block img {
border-radius: 5px;
border: solid 5px #dad7d5;
width: 22%;
}


.posts .posts_content {
font-size: 0.8em;
}

.info_film_page {
margin-top: 2%;
margin-bottom: 4%;
}

.info_film_page .label {
font-size: 1.2em;
}

.info_film_page .value {
font-size: 1em;
color: #49945a;
margin-right: 3%;
}


.description_film {
margin-bottom: 15%;
}

.description_film img {
float: left;
margin-right: 2%;
border-radius: 5px;
border: solid 5px #dad7d5;
}

.reviews {
margin-bottom: 4%;
font-size: 0.9em;
}

.reviews .review_name {
background-color: #7268ad;
color: white;
padding: 1%;
border-top-left-radius: 5px;
border-top-right-radius: 5px;
}

.reviews .review_text {
padding-top: 2%;
padding-bottom: 2%;
padding-left: 2%;
}

.send {
margin-bottom: 4%;
}

.send input[type="text"], textarea {
border: solid 1px #c3c3c3;
margin-bottom: 2%;
}

.send input[type="text"] {
width: 98%;
}

.send textarea {
width: 624px;
height: 200px;
}

.send input[type="submit"] {
background-color: #7268ad;
padding: 3%;
color: white;
border-radius: 5px;
}

.contact {
margin-bottom: 4%;
}
.contact input[type="text"], textarea {
border: solid 1px #c3c3c3;
margin-bottom: 2%;
}

.contact input[type="text"] {
width: 98%;
}

.contact input[type="email"], textarea {
border: solid 1px #c3c3c3;
margin-bottom: 2%;
}

.contact input[type="email"] {
width: 98%;
}


.contact textarea {
width: 624px;
height: 200px;
}

.contact input[type="submit"] {
background-color: #7268ad;
padding: 3%;
color: white;
border-radius: 5px;
}


.info_film {
margin-bottom: 5%;
background-color: #f9f9f9;
padding: 5%;
height: 270px;
}

.info_film img {
float: left;
margin-right: 2%;
border-radius: 5px;
border: solid 5px #dad7d5;
width: 25%;
}

.button {
background-color: #7268ad;
padding: 2%;
color: white;
border-radius: 5px;
float: right;
margin-top: 5%;
clear: both;
font-size: 0.8em;
}


.button a {
color: white;
}

table {
width: 100%;
border: solid 1px #f4f4f4;
}

td {
padding:2%;
border: solid 1px #f4f4f4;
}

td img {
width: 60px;
vertical-align: middle;
}

.center {
text-align: center;
}

.rating {
font-weight: bold;
}

.footer {
width: 100%;
height: 100px;
padding:28px 0 5px 0;
text-align: center;
background-color: darkslateblue;
color: #a8aa94;
margin-left: 0px;
margin-right: 0px;
min-width: 900px;
}

.footer a {
color: #a8aa94;
text-decoration: none;
}

.footer a:hover {
color: #fff;
text-decoration: none;
}

.footer p {
padding: 0 0 10px 0;

}

/* CSS Mobile */

@media only screen
and (min-device-width: 320px)
and (max-device-width: 568px) {

.header {
background-color: #257965;
min-width: 100%;
width: 20%;
text-align: center;
}

.logo {
width: 100%;
}
.site_content {
width: 100%;
}

.menubar {
width: 100%;
height: 100%;
}

.site_content {
width: 100%;
text-align: center;
}

.sidebar_container {
display: none;
}
.footer {
display: none;
}

ul.menu {
float: none;
}

ul.menu li {
margin: 0;
padding: 0;
float: none;
}

.logo h1 {
font: notmal 235% 'century gothic', arial, sans-serif;
}

.logo h2 {
font: notmal 100% 'century gothic', arial, sans-serif;
color: white;
}

}