body{
max-width:900px;
margin:auto;
padding:20px;
font-family:Arial,sans-serif;
line-height:1.6;
background:#ffffff;
color:#222;
}

header{
padding-bottom:15px;
border-bottom:1px solid #ddd;
margin-bottom:30px;
}

nav{
margin-bottom:30px;
}

nav a{
margin-right:20px;
text-decoration:none;
color:#0066cc;
}

section{
margin-bottom:30px;
padding:15px;
border:1px solid #eee;
border-radius:4px;
}

footer{
margin-top:30px;
font-size:14px;
color:#777;
}