body {
background:#111;
color:white;
font-family:Arial;
text-align:center;
}

header {
background:#007BFF;
padding:20px;
}

nav {
background:#222;
padding:10px;
}

nav a {
color:white;
margin:10px;
}

section {
padding:30px;
}

footer {
background:black;
padding:20px;
}