body {
  font-family: Arial, sans-serif;
  background-color: #f2f6fc;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.container {
  background: white;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
  text-align: center;
  width: 90%;
  max-width: 400px;
}

input {
  padding: 10px;
  width: 80%;
  margin-top: 10px;
  border: 1px solid #ccc;
  border-radius: 6px;
}

button {
  padding: 10px 20px;
  margin-top: 15px;
  background-color: #007bff;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

button:hover {
  background-color: #0056b3;
}

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

.hidden {
  display: none;
}