body {
    font-family: Arial, sans-serif;
    background: #f8f9fa;
    text-align: center;
    padding: 50px;
}

.container {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    width: 300px;
    margin: auto;
}

button {
    background: #007bff;
    color: white;
    border: none;
    padding: 10px 15px;
    cursor: pointer;
    margin-top: 10px;
    border-radius: 5px;
}

button:hover {
    background: #0056b3;
}

#result {
    margin-top: 20px;
    font-size: 18px;
    font-weight: bold;
}