body {
  background: url('фон.gif');
  color: maroon;
  font-family: Monotype corsiva;
  font-size: 24px;
}

h1 {
  font-family: Arial;
  font-size: 48px;
  color: gray;
  text-align: center;
}

.aligncenter {
    text-align: center;
}

form {
  border: 3px solid rgb(120, 50, 50);
  padding: 10px;
  margin:auto;
  display:table;
  align-self: center;
  text-align: center;
}