.bac-container {
    max-width: 400px;
    margin: 0 auto;
    padding: 20px;
    border: 1px solid #ddd;
    border-radius: 10px;
    text-align: center;
    background-color: #f9f9f9;
}

#bac-dob {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    border: 1px solid #ccc;
    border-radius: 5px;
}

#bac-calculate {
    padding: 10px 20px;
    background-color: #0073aa;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

#bac-calculate:hover {
    background-color: #005177;
}

#bac-result {
    margin-top: 20px;
    font-size: 18px;
    font-weight: bold;
}