body{
font-family: Arial;
margin:40px;
background:#f5f5f5;
}

h1{
text-align:center;
}

nav{
text-align:center;
margin-bottom:30px;
}

nav a{
margin:10px;
padding:10px;
background:#3498db;
color:white;
text-decoration:none;
border-radius:5px;
}

section{
background:white;
padding:20px;
margin-bottom:30px;
border-radius:5px;
}