#background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("https://lh3.googleusercontent.com/pw/AP1GczOs5S3pGB-ZXejvMy60yE1fN7jDexnt83GKWTDHFhK2hNnFskZrrzv9gstjLnHzJxI2AVJCrR61Ic8Ion5OSUWtHFyNVYXPwMI8d8CB_jZKeeUjHK1zt0f9poPkExhq-taKDCPq2cCHTNfOBgOJnwli=w1737-h977-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/AP1GczMdz1INnMhE-8v05nv0YnPNWMdwePcSFBGq5sFWwq6OZ59UVUX6VQ-yKwKjOIPQ1tnmZkHf07A-7Ev5IEC6FuXE0drjJ6prGnvPgrNyfs1KX1noW_d5n4FAWwoE91wqhzjXSU3se2q89vsrC9JHXpAy=w1280-h720-s-no-gm?authuser=6"); /* URL dell'immagine */
       background-size: cover; /* Adatta l'immagine al div */
       background-position: center; /* Centra l'immagine */
       background-repeat: no-repeat; /* Non ripetere l'immagine */
       }