.age-calculator-container {
    max-width: 600px;
    margin: 20px auto;
    padding: 25px;
    background: #f8f9fa;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.age-calculator-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.input-group {
    position: relative;
    display: flex;
    align-items: center;
}

.input-group i {
    position: absolute;
    left: 15px;
    color: #6c757d;
    z-index: 1;
}

#birthdatetime {
    width: 100%;
    padding: 12px 20px 12px 45px;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.3s ease;
}

#birthdatetime:focus {
    border-color: #86b7fe;
    outline: none;
    box-shadow: 0 0 0 4px rgba(13,110,253,0.25);
}

.age-calculator-btn {
    background: #0d6efd;
    color: white;
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.age-calculator-btn:hover {
    background: #0b5ed7;
    transform: translateY(-1px);
}

.age-result {
    margin-top: 20px;
    padding: 20px;
    background: white;
    border-radius: 8px;
    border: 2px solid #e9ecef;
    font-size: 18px;
    text-align: center;
    display: none;
}

.age-result.show {
    display: block;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 480px) {
    .age-calculator-container {
        margin: 10px;
        padding: 15px;
    }
}