body {
  font-family: sans-serif;
  padding: 2rem;
  background: #f4f4f4;
}
form {
  background: white;
  padding: 1rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  box-shadow: 0 0 5px rgba(0,0,0,0.1);
}
input {
  margin: 0.5rem 0;
  width: 100%;
  padding: 0.5rem;
}
button {
  padding: 0.5rem 1rem;
}
#ergebnis {
  white-space: pre-wrap;
  background: #fff;
  padding: 1rem;
  border-radius: 8px;
  box-shadow: 0 0 5px rgba(0,0,0,0.1);
}