body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}

h1 {
    background-color: #0071C5;
    color: white;
    padding: 10px;
    text-align: center;
}

form {
    background-color: white;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    max-width: 500px;
    margin: 0 auto;
}

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

select, input[type="number"] {
    width: 100%;
    padding: 8px;
    margin-top: 5px;
    border: 1px solid #ccc;
    border-radius: 3px;
}

input[type="submit"] {
    background-color: #0071C5;
    color: white;
    border: none;
    padding: 10px 20px;
    cursor: pointer;
    margin-top: 15px;
}

input[type="submit"]:hover {
    background-color: #005493;
}

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