body {
    font-family: Arial, sans-serif;
}

.container {
    width: 300px;
    margin: 50px auto;
    padding: 20px;
    border: 1px solid #ccc;
    border-radius: 5px;
}

form {
    display: flex;
    flex-direction: column;
}

label, input, button {
    margin: 5px 0;
}

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