body{
font-family: Arial, Helvetica, sans-serif;
margin:0;
background:#f4f4f4;
}

header{
background:#1f3a5f;
color:white;
padding:20px;
text-align:center;
}

nav{
margin-top:10px;
}

nav a{
color:white;
margin:0 15px;
text-decoration:none;
font-weight:bold;
}

nav a:hover{
text-decoration:underline;
}

main{
background:white;
max-width:900px;
margin:40px auto;
padding:30px;
line-height:1.6;
}

h1{
margin:0;
}

h2{
color:#1f3a5f;
}

footer{
text-align:center;
padding:20px;
background:#ddd;
}