ruchej/index.html

## index.html
<!DOCTYPE html>
<html lang="ru">
<head>
  <link rel="stylesheet" href="main.css" />
  <link rel="icon" type="image/x-icon" href="icon/favicon.ico">
  <link href="https://fonts.googleapis.com/css?family=Open+Sans" rel="stylesheet">
  <meta charset="utf-8">
  <title>Мебель класс 31</title>
</head>
<body>
  <div class="block main_block">
    <header class="block">
      <img class="block header_logo" src="icon/logo.svg" alt="Логотип">
      <img class="block header_slogan" src="icon/slogan.svg" alt="Мебель класс. Индивидуально Торчески">
      <div class="block adres">
        <p>(4722) 37-47-86</p>
        <p>8-904-533-88-68</p>
        <p>г.Белгород,</p>
        <p>ул.Конева 21б</p>
      </div>
    </header>
    <nav>
      <ul class="menu">
        <li><a href="#">Главная</a></li>
        <li><a href="#">Каталог</a>
          <ul>
            <li><a href="#">Кухни</a>
              <ul>
                <li><a href="#">Пластик</a></li>
                <li><a href="#">Шпон</a></li>
                <li><a href="#">Эмаль</a></li>
              </ul>
            </li>
            <li><a href="#">Шкафы-купе</a></li>
            <li><a href="#">Шкафы</a></li>
            <li><a href="#">Прихожие</a></li>
          </ul>
        </li>
        <li><a href="#">Материалы</a></li>
        <li><a href="#">Интересное</a></li>
        <li><a href="#">О нас</a></li>
      </ul>
    </nav>
    <main class="block">
      Главный блок
    </main>
  </div>
  <footer class="block">
    Подвал
  </footer>
</body>
</html>

## main.css
.block {
  /*border: 1px dotted #000000;*/
}

* {
  font-family: 'Open Sans', sans-serif;
  box-sizing: border-box;
}

/*  СТРАНИЦА */
html {
  height: 100%;
  background-image: url(img/background-2.png);
  background-position: center;
}

/* ТЕЛО */
body {
  height: 100%;
  padding: 0;
  margin: 0;
}

/*  ГЛАВНЫЙ БЛОК main */

.main_block {
  width: 960px;
  min-height: 100%;
  margin: 0 auto;
  padding: 3px;
  margin-bottom: -150px;
  background: rgba(255,255,255,0.7);
  -webkit-transition: all 0.8s ease-in-out;
}

/* ШАПКА */

header {
  height: 130px;
  width: 100%;
  overflow: hidden;
}

.header_logo {
  width: 110px;
  height: 110px;
  margin: 5px;
}

.header_slogan {
  width: 380px;
  vertical-align: top;
  margin: 5px 5px 5px 0;
}

.adres {
  width: 140px;
  font-size: 18px;
  line-height: 0.4;
  float: right;
  color: #3F5F94;
}

/* МЕНЮ */
.menu, .menu ul {
  margin: 0;
  padding: 0;
  list-style: none;
  text-transform: uppercase;
}

.menu {
  width: 100%;
  height: 30px;
  margin: 0 auto 5px;
  background: #3F5F94;
}

.menu {
  zoom: 1;
}

.menu:before, .menu:after {
  content: "";
  display: table;
}

.menu:after {
  content: "0";
  height: 50px;
  display: block;
  clear: both;
}

.menu li {
  float: left;
  position: relative;
}

.menu a {
  float: left;
  padding: 4px 20px;
  color: #fff;
  text-decoration: none;
}

.menu li:hover > ul {
  opacity: 1;
  visibility: visible;
  margin: 0;
}

.menu > li:hover > a {
/*  color: #3F5F94;
  background: #E9EFF8;*/
  border-bottom: 3px solid #FF7400;
  zoom: 1.2;
}

.menu ul {
  margin: 20px 0 0 0;
  position: absolute;
  opacity: 0;
  visibility: hidden;
  left: 0;
  top: 32px;
  z-index: 1;
  background: #3F5F94;
  transition: all .2s ease-in-out;
}

.menu ul ul {
  top: 0;
  left: 153px;
  margin: 0 0 0 20px;
}

.menu ul li {
  float: none;
  display: block;
  -moz-box-shadow: 0 1px 0 #263C61, 0 2px 0 #fff;
  -webkit-box-shadow: 0 1px 0 #263C61, 0 2px 0 #fff;
  box-shadow: 0 1px 0 #263C61, 0 2px 0 #fff;
}

.menu ul a {
  padding: 5px;
  width: 150px;
  display: block;
  float: none;
}

.menu ul a:hover {
  background: #FF7400;
}

.menu ul li:first-child > a:after {
  content: " ";
  position: absolute;
  left: 40px;
  top: -6px;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-bottom: 6px solid #3F5F94;
}

.menu ul li:first-child > a:hover:after {
  border-bottom: 6px solid #FF7400;
  color: #000;
}

.menu ul ul li:first-child a:after {
  left: -6px;
  top: 50%;
  margin-top: -6px;
  border-left: 0;
  border-bottom: 6px solid transparent;
  border-top: 6px solid transparent;
  border-right: 6px solid #3F5F94;
}

.menu ul ul li:first-child a:hover:after {
  border-right: 6px solid #FF7400;
  border-bottom-color: transparent;
}

/*  ОБЩЕЕ */

.clearfix:before,
.clearfix:after {
    content: " ";
    display: table;
}
.clearfix:after {
    clear: both;
}
.clearfix {
    *zoom: 1;
}


main {
  display: block;
}

footer {
  width: 960px;
  margin: 0 auto;
  height: 150px;
  background-color: #3F5F94;
  -webkit-transition: all 0.8s ease-in-out;
}


/*Адаптация макета*/

@media screen and (max-width: 960px) {

.main_block, footer {
    width: 100%;
 }
}
	<!DOCTYPE html>
	<html lang="ru">
	<head>
	<link rel="stylesheet" href="main.css" />
	<link rel="icon" type="image/x-icon" href="icon/favicon.ico">
	<link href="https://fonts.googleapis.com/css?family=Open+Sans" rel="stylesheet">
	<meta charset="utf-8">
	<title>Мебель класс 31</title>
	</head>
	<body>
	<div class="block main_block">
	<header class="block">
	<img class="block header_logo" src="icon/logo.svg" alt="Логотип">
	<img class="block header_slogan" src="icon/slogan.svg" alt="Мебель класс. Индивидуально Торчески">
	<div class="block adres">
	<p>(4722) 37-47-86</p>
	<p>8-904-533-88-68</p>
	<p>г.Белгород,</p>
	<p>ул.Конева 21б</p>
	</div>
	</header>
	<nav>
	<ul class="menu">
	<li><a href="#">Главная</a></li>
	<li><a href="#">Каталог</a>
	<ul>
	<li><a href="#">Кухни</a>
	<ul>
	<li><a href="#">Пластик</a></li>
	<li><a href="#">Шпон</a></li>
	<li><a href="#">Эмаль</a></li>
	</ul>
	</li>
	<li><a href="#">Шкафы-купе</a></li>
	<li><a href="#">Шкафы</a></li>
	<li><a href="#">Прихожие</a></li>
	</ul>
	</li>
	<li><a href="#">Материалы</a></li>
	<li><a href="#">Интересное</a></li>
	<li><a href="#">О нас</a></li>
	</ul>
	</nav>
	<main class="block">
	Главный блок
	</main>
	</div>
	<footer class="block">
	Подвал
	</footer>
	</body>
	</html>
	.block {
	/border: 1px dotted #000000;/
	}

	* {
	font-family: 'Open Sans', sans-serif;
	box-sizing: border-box;
	}

	/* СТРАНИЦА */
	html {
	height: 100%;
	background-image: url(img/background-2.png);
	background-position: center;
	}

	/* ТЕЛО */
	body {
	height: 100%;
	padding: 0;
	margin: 0;
	}

	/* ГЛАВНЫЙ БЛОК main */

	.main_block {
	width: 960px;
	min-height: 100%;
	margin: 0 auto;
	padding: 3px;
	margin-bottom: -150px;
	background: rgba(255,255,255,0.7);
	-webkit-transition: all 0.8s ease-in-out;
	}

	/* ШАПКА */

	header {
	height: 130px;
	width: 100%;
	overflow: hidden;
	}

	.header_logo {
	width: 110px;
	height: 110px;
	margin: 5px;
	}

	.header_slogan {
	width: 380px;
	vertical-align: top;
	margin: 5px 5px 5px 0;
	}

	.adres {
	width: 140px;
	font-size: 18px;
	line-height: 0.4;
	float: right;
	color: #3F5F94;
	}

	/* МЕНЮ */
	.menu, .menu ul {
	margin: 0;
	padding: 0;
	list-style: none;
	text-transform: uppercase;
	}

	.menu {
	width: 100%;
	height: 30px;
	margin: 0 auto 5px;
	background: #3F5F94;
	}

	.menu {
	zoom: 1;
	}

	.menu:before, .menu:after {
	content: "";
	display: table;
	}

	.menu:after {
	content: "0";
	height: 50px;
	display: block;
	clear: both;
	}

	.menu li {
	float: left;
	position: relative;
	}

	.menu a {
	float: left;
	padding: 4px 20px;
	color: #fff;
	text-decoration: none;
	}

	.menu li:hover > ul {
	opacity: 1;
	visibility: visible;
	margin: 0;
	}

	.menu > li:hover > a {
	/* color: #3F5F94;
	background: #E9EFF8;*/
	border-bottom: 3px solid #FF7400;
	zoom: 1.2;
	}

	.menu ul {
	margin: 20px 0 0 0;
	position: absolute;
	opacity: 0;
	visibility: hidden;
	left: 0;
	top: 32px;
	z-index: 1;
	background: #3F5F94;
	transition: all .2s ease-in-out;
	}

	.menu ul ul {
	top: 0;
	left: 153px;
	margin: 0 0 0 20px;
	}

	.menu ul li {
	float: none;
	display: block;
	-moz-box-shadow: 0 1px 0 #263C61, 0 2px 0 #fff;
	-webkit-box-shadow: 0 1px 0 #263C61, 0 2px 0 #fff;
	box-shadow: 0 1px 0 #263C61, 0 2px 0 #fff;
	}

	.menu ul a {
	padding: 5px;
	width: 150px;
	display: block;
	float: none;
	}

	.menu ul a:hover {
	background: #FF7400;
	}

	.menu ul li:first-child > a:after {
	content: " ";
	position: absolute;
	left: 40px;
	top: -6px;
	border-left: 6px solid transparent;
	border-right: 6px solid transparent;
	border-bottom: 6px solid #3F5F94;
	}

	.menu ul li:first-child > a:hover:after {
	border-bottom: 6px solid #FF7400;
	color: #000;
	}

	.menu ul ul li:first-child a:after {
	left: -6px;
	top: 50%;
	margin-top: -6px;
	border-left: 0;
	border-bottom: 6px solid transparent;
	border-top: 6px solid transparent;
	border-right: 6px solid #3F5F94;
	}

	.menu ul ul li:first-child a:hover:after {
	border-right: 6px solid #FF7400;
	border-bottom-color: transparent;
	}

	/* ОБЩЕЕ */

	.clearfix:before,
	.clearfix:after {
	content: " ";
	display: table;
	}
	.clearfix:after {
	clear: both;
	}
	.clearfix {
	*zoom: 1;
	}


	main {
	display: block;
	}

	footer {
	width: 960px;
	margin: 0 auto;
	height: 150px;
	background-color: #3F5F94;
	-webkit-transition: all 0.8s ease-in-out;
	}






	/Адаптация макета/

	@media screen and (max-width: 960px) {

	.main_block, footer {
	width: 100%;
	}
	}