body { font-family: Arial, sans-serif; margin:0; padding:0; background:#fafafa; }
header { background:#333; color:#fff; padding:10px; }
header nav a { color:#fff; margin:0 10px; text-decoration:none; }
main { padding:20px; }
footer { background:#eee; padding:10px; text-align:center; margin-top:20px; }
form input, form textarea { width:100%; max-width:400px; margin:5px 0; padding:8px; }
button { padding:8px 15px; background:#333; color:#fff; border:none; cursor:pointer; }

.categoria { margin-bottom: 30px; }
.categoria h3 { background:#444; color:#fff; padding:5px 10px; }
.siti { list-style:none; padding:0; }
.scheda-sito { background:#fff; border:1px solid #ddd; margin:5px 0; padding:10px; border-radius:5px; }
.scheda-sito h4 { margin:0; }
.scheda-sito a { color:#0066cc; text-decoration:none; }
.scheda-sito a:hover { text-decoration:underline; }