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

header{
background:#2c3e50;
color:white;
padding:40px;
text-align:center;
}

nav{
background:#34495e;
padding:10px;
text-align:center;
}

nav a{
color:white;
margin:10px;
text-decoration:none;
font-weight:bold;
}

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

footer{
text-align:center;
padding:20px;
background:#2c3e50;
color:white;
margin-top:20px;
}