body {
    background-image: url(castle-background.jpg);
    background-repeat: no-repeat;
    background-position: center;
    background-attachment: fixed;
    background-size: cover;
    color: black;
}
.class1 {
  border: 2px white;
  background-color: white;
  color: black;
  width: 600px;
  padding: 10px;
  margin: auto;
  text-align: center;
}
button {
  border: 2px solid blue;
  background-color: white;
  font-weight: bold;
  cursor: pointer;
}