.pwc-calculator {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
    border: 1px solid #ddd;
    border-radius: 5px;
}
.pwc-field {
    margin-bottom: 15px;
}
.pwc-field label {
    display: inline-block;
    width: 150px;
}
.pwc-field select, .pwc-field input {
    width: 200px;
    padding: 5px;
}
button {
    padding: 10px 20px;
    background-color: #0073aa;
    color: white;
    border: none;
    border-radius: 3px;
    cursor: pointer;
}
button:hover {
    background-color: #005177;
}
#pwc-result {
    font-weight: bold;
}