#background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("https://lh3.googleusercontent.com/pw/AP1GczPgDviEMCKQkNH_VzjLkXen9-b9FybOr2L-qHi8tFTp7gN0AyGdhQNUBSb-qOkT3FpgZ_Lo3WzOQmrRkAf8veKHWKI8ApBopPxKoFuz9PqorzVZD9D_D0-vZPj-hgskgDMJiWYLaQ5CTfVR0yHJXyha=w1280-h720-s-no-gm?authuser=6");
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: -1; /* Posiziona lo sfondo dietro il contenuto */
}

#header{
       width: auto; /* Larghezza del div */
       height: 250px; /* Altezza del div */
       background-image: url("https://lh3.googleusercontent.com/pw/AP1GczMrPQeH6Yta7eohMgxRYrgMHILHNMS1VPdjxL1ED1xJfOjqVzPyMdbW5Br-hWirRCU3-lFHhAIhqJw-Q8QAZMMolQPn_jnN1WYCgR_GdGmbJxyRUhWf4HmnCrr4YjZMesXtUXKanPztOxXZVhKtSSu_=w1280-h441-s-no-gm?authuser=6"); /* URL dell'immagine */
       background-size: cover; /* Adatta l'immagine al div */
       background-position: top; /* Centra l'immagine */
       background-repeat: no-repeat; /* Non ripetere l'immagine */
       }