CSS09（復習）

CSS 
<!doctype html>
<html lang="ja">
<head>
<meta charset="utf-8">
<link rel="stylesheet" href="css/style1.css" media="all">
<title>確認テストCSS01</title>
</head>
<body>
<div id="container">

<div id="header">
<p>ここにheaderが入る</p>
<div id="nav">
<ul>
<li id="home"><a href="#"><span>ホーム</span></a></li>
<li id="food"><a href="#"><span>カフェフード</span></a></li>
<li id="drink"><a href="#"><span>カフェドリンク</span></a></li>
<li id="info"><a href="#"><span>インフォメーション</span></a></li>
<li id="contact"><a href="#"><span>お問い合わせ</span></a></li>
</ul>
</div><!--/#nav-->
</div><!--/#header-->

<div id="wrapper">
<div id="content">
<p>ここにcontentが入る</p></div>
<div id="sidebar">
<p>ここにsidebarが入る</p></div>
</div><!-- /wrapper -->

<div id="footer">
<p>ここにfooterが入る</p>
</div>

</div><!-- /container-->
</body>
</html>

@charset "utf-8";
/* CSS Document */
body, div, ul, li, p {
  margin: 0;
  padding: 0;
}
ul {
  list-style: none;
}
body {
  font-family:
    "Hiragino Kaku ProN",
    Meiryo,
    sans-serif;
  text-align: center;
}
div {
  position: relative;
}
p {
  position: relative;
}
span {
  visibility: hidden;
}
#container {
  width: 814px;
  background-color: #ffffff;
  padding: 10px;
  margin: 0 auto;
}
#header {
  height: 130px;
  margin-bottom: 10px;
  border: 2px solid #d3d3d3;
  position: relative;
}
#nav {
  width: 810px;
  height: 60px;
  padding: 5px;
  position: absolute;
  bottom: 0px;
}
#nav ul {
  overflow: hidden;
}
#nav ul li {
  float: left;
}
#nav ul a {
  width: 160px;
  height: 60px;
  display: block;
  background-image: url(../img/btn.jpg);
  background-repeat: no-repeat;
}
#nav li#home a:link, #nav li#home a:visited {
  background-position: left top;
}
#nav li#home a:hover, #navv li#home a:active {
  background-position: left -70px;
}
#nav li#food a:link, #nav li#food a:visited {
  background-position: -160px top;
}
#nav li#food a:hover, #navv li#food a:active {
  background-position: -160px -70px;
}
#nav li#drink a:link, #nav li#drink a:visited {
  background-position: -320px top;
}
#nav li#drink a:hover, #navv li#drink a:active {
  background-position: -320px -70px;
}
#nav li#info a:link, #nav li#info a:visited {
  background-position: -480px top;
}
#nav li#info a:hover, #navv li#info a:active {
  background-position: -480px -70px;
}
#nav li#contact a:link, #nav li#contact a:visited {
  background-position: -640px top;
}
#nav li#contact a:hover, #navv li#contact a:active {
  background-position: -640px -70px;
}
#wrapper{
  margin-bottom: 10px;
  overflow: hidden;
}
#content {
  width: 556px;
  height: 300px;
  background-color: #ffffe0;
  border: 2px solid #d3d3d3;
  float: left;
}
#sidebar {
  width: 240px;
  height: 300px;
  background-color: #e0ffff;
  border: 2px solid #d3d3d3;
  float: right;
}
#footer {
  background-color: #e0c0fe;
  height: 100px;
  border: 2px solid #d3d3d3;
  clear: both;
  line-height: 100px;
}