.contenitore {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 15px;
}

@media (max-width: 768px) {
    .contenitore {
        padding: 0 10px;
    }

    header, nav, main, footer {
        text-align: center;
    }

    header div,
    nav button {
        width: 100%;
        margin-bottom: 10px;
    }

    nav button {
        display: block;
    }
}

html, body {
  height: 100%;
  margin: 0;
}

.contenitore {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}





.titolo-centrato {
  text-align: center;
  font-size: 2em;
  font-weight: bold;
  margin-top: 20px;
  margin-bottom: 10px;
}