body{
      font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background-image:url("sfondo_carta.jpg");
  background-size: cover;
  background-attachment: fixed;
  background-position: center;    
  margin-left: 25%;  
  margin-right: 25%;
    }
table{
      border-collapse: separate;
    }
.paragrafo {
  cursor: pointer;
}

.evidenziato {
  background-color: yellow;
}
.nascosto {
    display: none;
}