/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px 10px;
}

/* Container */
.container {
    max-width: 900px;
    margin: 0 auto;
    background: white;
    border-radius: 16px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

/* Header */
.header {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
    padding: 30px;
    text-align: center;
}

.header h1 {
    font-size: 2.5rem;
    margin-bottom: 8px;
    font-weight: 700;
}

.header h1 i {
    margin-right: 12px;
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Main Content */
.main-content {
    padding: 30px;
}

/* Section Headers */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    flex-wrap: wrap;
    gap: 15px;
}

.section-header h2 {
    color: #2c3e50;
    font-size: 1.4rem;
    font-weight: 600;
}

.section-header h2 i {
    margin-right: 8px;
    color: #3498db;
}

/* Buttons */
.btn-add {
    background: linear-gradient(135deg, #56ab2f 0%, #a8e6cf 100%);
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-add:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(86, 171, 47, 0.3);
}

.btn-remove {
    background: #e74c3c;
    color: white;
    border: none;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.btn-remove:hover {
    background: #c0392b;
    transform: scale(1.1);
}

/* Service Items */
.service-items {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 30px;
}

.service-item {
    background: #f8f9fa;
    border: 2px solid #e9ecef;
    border-radius: 12px;
    padding: 20px;
    transition: all 0.3s ease;
}

.service-item:hover {
    border-color: #3498db;
    box-shadow: 0 8px 25px rgba(52, 152, 219, 0.1);
}

.item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.item-number {
    font-weight: 600;
    color: #2c3e50;
    font-size: 1.1rem;
}

.item-content {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group.full-width {
    width: 100%;
}

.form-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1.5fr;
    gap: 20px;
    align-items: end;
}

.form-group label {
    font-weight: 600;
    color: #34495e;
    font-size: 0.9rem;
}

.form-group input {
    padding: 12px;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: white;
}

.form-group input:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.service-description {
    width: 100%;
}

.item-total {
    background: #ecf0f1;
    padding: 12px;
    border-radius: 8px;
    font-weight: 600;
    color: #2c3e50;
    text-align: center;
    border: 2px solid #bdc3c7;
}

/* VAT Section */
.vat-section {
    background: #f8f9fa;
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 30px;
    border: 2px solid #e9ecef;
}

.vat-section h3 {
    color: #2c3e50;
    margin-bottom: 20px;
    font-size: 1.2rem;
}

.vat-section h3 i {
    margin-right: 8px;
    color: #e74c3c;
}

.vat-control label {
    display: block;
    margin-bottom: 15px;
    font-weight: 600;
    color: #34495e;
    font-size: 1.1rem;
}

#vatValue {
    color: #e74c3c;
    font-size: 1.2rem;
}

.vat-slider {
    width: 100%;
    height: 8px;
    border-radius: 5px;
    background: #ddd;
    outline: none;
    appearance: none;
    margin-bottom: 10px;
}

.vat-slider::-webkit-slider-thumb {
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #e74c3c;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

.vat-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #e74c3c;
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

.vat-marks {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: #7f8c8d;
    margin-top: 5px;
}

/* Summary Section */
.summary-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 30px;
}

.summary-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    font-size: 1.1rem;
}

.summary-row.total {
    border-top: 2px solid rgba(255, 255, 255, 0.3);
    padding-top: 15px;
    margin-top: 15px;
    font-size: 1.3rem;
    font-weight: 700;
}

.summary-row .label {
    font-weight: 500;
}

.summary-row .value {
    font-weight: 700;
    text-align: right;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-primary, .btn-secondary {
    padding: 15px 30px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.btn-secondary {
    background: #95a5a6;
    color: white;
}

.btn-secondary:hover {
    background: #7f8c8d;
    transform: translateY(-2px);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: #7f8c8d;
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 15px;
    opacity: 0.5;
}

.empty-state p {
    font-size: 1.1rem;
    margin-bottom: 20px;
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: 10px 5px;
    }
    
    .header {
        padding: 20px 15px;
    }
    
    .header h1 {
        font-size: 1.8rem;
    }
    
    .main-content {
        padding: 20px 15px;
    }
    
    .section-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .btn-primary, .btn-secondary {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 1.5rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .service-item {
        padding: 15px;
    }
    
    .summary-row {
        font-size: 1rem;
    }
    
    .summary-row.total {
        font-size: 1.2rem;
    }
}

/* Template Hidden */
template {
    display: none;
}