body {
  font-family: Arial, sans-serif;
  background: #f4f4f4;
  padding: 40px;
}

.container {
  max-width: 400px;
  background: #fff;
  padding: 20px;
  margin: auto;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

input, button {
  width: 100%;
  margin: 10px 0;
  padding: 10px;
  font-size: 1em;
}

button {
  background: #0078d7;
  color: white;
  border: none;
  cursor: pointer;
}

button:hover {
  background: #005fa3;
}

#result {
  margin-top: 20px;
  font-weight: bold;
}