.puc-container {
    max-width: 500px;
    margin: 30px auto;
    padding: 20px;
    background: #f9f9f9;
    border-radius: 12px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    text-align: center;
    font-family: Arial, sans-serif;
}
.puc-container h2 {
    margin-bottom: 20px;
}
.puc-container select, .puc-container input {
    padding: 10px;
    margin: 5px;
    border-radius: 6px;
    border: 1px solid #ccc;
    width: 120px;
}
#converted-value {
    margin-top: 20px;
    font-size: 18px;
    font-weight: bold;
    color: green;
}