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

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

nav{
margin-top:10px;
}

nav a{
color:white;
margin:0 10px;
text-decoration:none;
font-weight:bold;
}

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

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

footer{
text-align:center;
padding:20px;
background:#222;
color:white;
margin-top:40px;
}

/* Banner da página inicial */

.banner{
width:100%;
height:auto;
display:block;
margin-bottom:30px;
border-radius:8px;
}