body,html{margin:0;padding:0;min-height:100%;font-family:sans-serif}.sfondo-perfetto{background-image:url('la-tua-immagine.jpg');background-position:center;background-repeat:no-repeat;background-size:cover;background-attachment:fixed;width:100%;min-height:100vh;display:flex;justify-content:center;align-items:center;text-align:center;padding:40px 20px;box-sizing:border-box}.contenuto-centrato{background:rgba(0,0,0,0.5);padding:30px;border-radius:10px;max-width:600px;width:100%;color:white}.logo{max-width:150px;height:auto;margin-bottom:20px}h1{margin:0 0 15px 0;font-size:2.5rem}p{margin:0 0 15px 0;font-size:1.2rem;line-height:1.6}p:last-child{margin-bottom:0}