#Bottone{
  width: 250px;
  height: 40px;
  font-family: Verdana, Geneva, Tahoma, sans-serif;
  background-color: white;
  border-radius: 5px;
}

.center{margin: auto;}

.sfondo{
  width: 100%;
  height: 60px;
  display: flex;
  background-color: black;
}

.iframe{height: 92%;width: 100%;border-width: 0;}

body{
margin: 0;
}