body {
  font-family: Arial, sans-serif;
  background-color: #f4f4f4;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.container {
  background: white;
  padding: 20px;
  border-radius: 8px;
  max-width: 400px;
  width: 100%;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  text-align: center;
}

h1 {
  margin-bottom: 20px;
}

button {
  margin: 10px 5px;
  padding: 10px 20px;
  font-size: 16px;
  cursor: pointer;
  border: none;
  border-radius: 4px;
  background-color: #007bff;
  color: white;
  transition: background-color 0.3s;
}

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

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