body{
font-family: Arial;
margin:0;
background:#f5f7fa;
}

header{
background:#0a3d62;
color:#fff;
text-align:center;
padding:30px;
}

nav{
background:#1e272e;
text-align:center;
padding:10px;
}

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

section{
background:#fff;
margin:20px;
padding:25px;
border-radius:6px;
}

h2{color:#0a3d62;}

input, textarea{
width:100%;
padding:10px;
margin:10px 0;
}

button,.btn{
background:#0a3d62;
color:white;
padding:10px 15px;
border:none;
border-radius:4px;
cursor:pointer;
text-decoration:none;
display:inline-block;
}

.whatsapp{
position:fixed;
bottom:20px;
right:20px;
background:#25D366;
color:white;
font-size:24px;
padding:15px;
border-radius:50%;
text-decoration:none;
}

footer{
background:#1e272e;
color:white;
text-align:center;
padding:15px;
}
@media print {
nav, .whatsapp, button { display:none; }
section { margin:0; }
}