body {
  background-color: white;
  font-family: sans-serif;
  text-align: center;
  margin: 0;
  padding: 0;
}

.contenitore {
  padding-top: 50px;
}

button {
  font-size: 20px;
  padding: 10px 20px;
  margin: 10px auto;
  display: block;
  width: 80%;
  max-width: 300px;
  border: 2px solid #444;
  background-color: #f0f0f0;
  cursor: pointer;
}