.ac-container {
    max-width: 400px;
    margin: 20px auto;
    padding: 20px;
    border: 2px solid #eee;
    border-radius: 10px;
    background: #f9f9f9;
    text-align: center;
    box-shadow: 0px 3px 10px rgba(0,0,0,0.1);
}

.ac-container h3 {
    margin-bottom: 15px;
    font-size: 20px;
    color: #333;
}

#ac-container input, 
#ac-container button {
    width: 90%;
    padding: 10px;
    margin: 8px 0;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 16px;
}

#ac-container button {
    background: #0073aa;
    color: #fff;
    cursor: pointer;
}

#ac-container button:hover {
    background: #005f8d;
}

#ageResult {
    margin-top: 15px;
    font-size: 16px;
    font-weight: bold;
    color: #444;
}