body {
  font-family: 'Vazir', sans-serif;
  background: linear-gradient(to right, #0f2027, #203a43, #2c5364);
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.container {
  background: rgba(255, 255, 255, 0.1);
  padding: 2rem;
  border-radius: 10px;
  text-align: center;
}

input, button {
  padding: 0.5rem;
  margin: 1rem 0;
  border: none;
  border-radius: 5px;
}

button {
  background-color: #00ffff;
  color: #000;
  cursor: pointer;
}

#result {
  margin-top: 1rem;
  font-weight: bold;
  font-size: 1.2rem;
}