.age-calculator-container {
    font-family: 'Arial', sans-serif;
    max-width: 600px;
    margin: 0 auto;
    padding: 25px;
    background-color: #f8f9fa;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.age-calculator-container h3 {
    color: #2c3e50;
    margin-bottom: 25px;
    text-align: center;
    font-size: 26px;
    font-weight: 600;
}

.age-calculator-container h3 i {
    margin-right: 12px;
    color: #e74c3c;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #34495e;
    font-size: 16px;
}

.form-group label i {
    margin-right: 10px;
    color: #3498db;
    width: 20px;
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 16px;
    transition: all 0.3s;
    box-sizing: border-box;
}

.form-control:focus {
    border-color: #3498db;
    outline: none;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
}

.date-picker {
    background-color: white;
    cursor: pointer;
}

.btn-calculate {
    width: 100%;
    padding: 14px;
    background-color: #e74c3c;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 17px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    margin-top: 10px;
}

.btn-calculate:hover {
    background-color: #c0392b;
    transform: translateY(-2px);
}

.result-container {
    margin-top: 30px;
    padding: 20px;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    border: 1px solid #eee;
}

.result-container h4 {
    color: #2c3e50;
    margin-bottom: 20px;
    font-size: 20px;
    text-align: center;
    font-weight: 600;
}

.result-container h4 i {
    margin-right: 10px;
    color: #e74c3c;
}

.result-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
}

.result-item {
    text-align: center;
    padding: 15px;
    background-color: #f8f9fa;
    border-radius: 6px;
    transition: all 0.3s;
}

.result-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.result-value {
    display: block;
    font-size: 28px;
    font-weight: 700;
    color: #e74c3c;
    margin-bottom: 5px;
}

.result-label {
    font-size: 14px;
    color: #7f8c8d;
    font-weight: 600;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .age-calculator-container {
        padding: 20px;
    }
    
    .result-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .age-calculator-container {
        padding: 15px;
    }
    
    .result-grid {
        grid-template-columns: 1fr;
    }
    
    .result-value {
        font-size: 24px;
    }
}

/* jQuery UI Datepicker customization */
.ui-datepicker {
    background: white;
    border: 1px solid #ddd;
    border-radius: 6px;
    padding: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.ui-datepicker-header {
    background: #e74c3c;
    color: white;
    border: none;
    border-radius: 4px;
}

.ui-datepicker-prev, .ui-datepicker-next {
    cursor: pointer;
    color: white;
}

.ui-datepicker-title select {
    background: white;
    color: #333;
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 2px;
}

.ui-datepicker-calendar th {
    color: #e74c3c;
    font-weight: 600;
}

.ui-datepicker-calendar td a {
    text-align: center;
    color: #333;
    border-radius: 4px;
}

.ui-datepicker-calendar td a:hover {
    background: #e74c3c;
    color: white;
}

.ui-datepicker-calendar .ui-state-active {
    background: #3498db;
    color: white;
}