Шрифт h1, h2 отличаеться от того что в уроке по html. в чём ошибка может быть?

* {
  margin: 0px;
  padding: 0px;
}

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="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% "centry 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: #ffff;
  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: 222px;
  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: #136cb2;
}

.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;
}

.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;
}

.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: white;
  text-decoration: none;
}

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