/* Main Calculator Container */
.ntg-calculator-container {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* Calculator Header */
.ntg-calculator-header {
    text-align: center;
    margin-bottom: 25px;
    color: #2c3e50;
}

.ntg-calculator-header h2 {
    margin: 0;
    font-size: 28px;
    font-weight: 600;
}

.ntg-calculator-header i {
    margin-right: 10px;
    color: #3498db;
}

/* Input Groups */
.ntg-input-group {
    margin-bottom: 20px;
}

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

.ntg-input-group label i {
    margin-right: 8px;
    color: #3498db;
}

.ntg-input {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #dfe6e9;
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.3s ease;
    background-color: #fff;
}

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

/* Button Styles */
.ntg-button-group {
    display: flex;
    gap: 15px;
    margin: 25px 0;
}

.ntg-button {
    flex: 1;
    padding: 12px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ntg-button i {
    margin-right: 8px;
}

.ntg-calculate-btn {
    background-color: #2ecc71;
    color: white;
}

.ntg-calculate-btn:hover {
    background-color: #27ae60;
}

.ntg-reset-btn {
    background-color: #e74c3c;
    color: white;
}

.ntg-reset-btn:hover {
    background-color: #c0392b;
}

.ntg-copy-btn {
    background-color: #3498db;
    color: white;
    margin-top: 20px;
}

.ntg-copy-btn:hover {
    background-color: #2980b9;
}

/* Results Container */
.ntg-results-container {
    background-color: white;
    padding: 20px;
    border-radius: 10px;
    margin-top: 20px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.ntg-results-container h3 {
    margin-top: 0;
    color: #2c3e50;
    border-bottom: 2px solid #ecf0f1;
    padding-bottom: 10px;
    display: flex;
    align-items: center;
}

.ntg-results-container h3 i {
    margin-right: 10px;
    color: #3498db;
}

.ntg-result-item {
    display: flex;
    justify-content: space-between;
    margin: 15px 0;
    padding-bottom: 10px;
    border-bottom: 1px dashed #ecf0f1;
}

.ntg-result-item:last-child {
    border-bottom: none;
}

.ntg-result-value {
    font-weight: 600;
    color: #2c3e50;
}

.ntg-gross-amount {
    font-size: 18px;
    color: #27ae60;
}

.ntg-gross-amount .ntg-result-value {
    font-size: 20px;
    color: #27ae60;
}

/* Footer */
.ntg-calculator-footer {
    text-align: center;
    margin-top: 20px;
    font-size: 14px;
    color: #7f8c8d;
}

/* Responsive Design */
@media (max-width: 768px) {
    .ntg-calculator-container {
        padding: 15px;
    }
    
    .ntg-button-group {
        flex-direction: column;
    }
}

/* Animation */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.ntg-results-container {
    animation: fadeIn 0.5s ease-out;
}