body {
 font-family: Arial, sans-serif;
 line-height: 1.6;
 margin: 0;
 padding: 0;
}
header {
 background-color: #f4f4f4;
 padding: 10px;
 text-align: center;
}
nav a {
 margin: 0 5px;
 text-decoration: none;
}
footer {
 text-align: center;
 padding: 10px;
 background-color: #f4f4f4;
}