body {
  font-family: 'Segoe UI', sans-serif;
  background: linear-gradient(to right, #0f2027, #203a43, #2c5364);
  color: white;
  text-align: center;
  padding: 50px;
}

h1 {
  font-size: 2.5em;
  margin-bottom: 20px;
  animation: fadeIn 2s ease-in-out;
}

button {
  font-size: 1.2em;
  padding: 15px 30px;
  margin: 10px;
  border: none;
  border-radius: 10px;
  background-color: #00c9ff;
  color: #fff;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

button:hover {
  background-color: #007c9f;
}

#output {
  margin-top: 40px;
  font-size: 1.5em;
  opacity: 0;
  transition: opacity 1s ease;
}

#secretInput {
  margin-top: 20px;
  padding: 10px;
  font-size: 1.1em;
  border-radius: 8px;
  border: none;
  width: 250px;
  display: none;
}

@keyframes fadeIn {
  from { opacity: 0 }
  to { opacity: 1 }
}