body {
    font-family: 'Arial', sans-serif;
    margin: 20px;
    text-align: center;
}

h1 {
    color: #333;
}

label {
    display: block;
    margin-top: 10px;
}

select {
    padding: 5px;
    font-size: 16px;
}

button {
    padding: 10px;
    margin-top: 10px;
    font-size: 16px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

button:hover {
    background-color: #45a049;
}

#result {
    margin-top: 20px;
    font-size: 18px;
    color: #333;
}