.age-calculator {
    max-width: 420px;
    margin: 20px auto;
    padding: 25px;
    border-radius: 10px;
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.15);
    text-align: center;
    font-family: 'Arial', sans-serif;
}

.age-calculator label {
    font-size: 18px;
    font-weight: bold;
    display: block;
    margin-bottom: 12px;
}

.age-calculator input {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    border: 2px solid #0073aa;
    border-radius: 6px;
    font-size: 16px;
    outline: none;
}

.age-calculator button {
    background: #0073aa;
    color: white;
    padding: 12px 18px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 18px;
    transition: background 0.3s ease;
}

.age-calculator button:hover {
    background: #005177;
}

#age-result {
    margin-top: 20px;
    font-size: 18px;
    color: #333;
}

.result-box {
    padding: 15px;
    border-radius: 6px;
    background: #d4edda;
    color: #155724;
    font-size: 16px;
    margin-top: 10px;
    border: 1px solid #c3e6cb;
}

.error-msg {
    color: #dc3545;
    font-size: 16px;
    font-weight: bold;
}

.loading-msg {
    color: #0073aa;
    font-size: 16px;
    font-style: italic;
}