body{
font-family: Arial;
margin:0;
background:#f5f5f5;
}

header{
background:#2e7d32;
color:white;
padding:20px;
}

nav a{
color:white;
margin-right:15px;
text-decoration:none;
}

section{
padding:30px;
background:white;
margin:20px;
}

footer{
text-align:center;
padding:20px;
background:#222;
color:white;
}