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

:root {
    --primary-color: #4f46e5;
    --primary-dark: #4338ca;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --bg-color: #f9fafb;
    --card-bg: #ffffff;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* Login Screen */
.login-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    padding: 20px;
}

.login-container {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 40px;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 400px;
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.login-header p {
    color: var(--text-secondary);
}

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

.login-form label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.login-form input {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

.login-form input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.login-footer {
    margin-top: 20px;
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Main App */
.main-app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header */
.app-header {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    flex-direction: column;
}

.header-top {
    padding: 10px 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 1px solid var(--border-color);
}

.shop-logo-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.shop-logo-container img {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    object-fit: cover;
}

.shop-name {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
}

.header-bottom {
    padding: 8px 15px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 15px;
}

.main-nav {
    display: flex;
    gap: 8px;
    align-items: center;
    flex: 1;
}

.nav-btn {
    padding: 10px 16px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

.nav-btn:hover {
    background: var(--bg-color);
    color: var(--primary-color);
}

.nav-btn.active {
    background: var(--primary-color);
    color: white;
}

.nav-btn i {
    font-size: 1rem;
}

.nav-text {
    display: inline;
}

.header-user-section {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.user-name {
    color: var(--text-secondary);
    font-size: 0.875rem;
    white-space: nowrap;
}

.logout-text {
    display: inline;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 20px;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    overflow-x: hidden;
}

.page {
    display: none;
}

.page.active {
    display: block;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 15px;
}

.page-header h2 {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.header-actions {
    display: flex;
    gap: 10px;
    align-items: center;
}

/* POS Page */
.pos-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 20px;
}

.pos-left {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.pos-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.pos-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.pos-controls {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.product-search {
    position: relative;
}

.product-search input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

.product-search input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.search-results {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-top: 5px;
    max-height: 300px;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    z-index: 100;
    display: none;
}

.search-results.show {
    display: block;
}

.search-result-item {
    padding: 12px 16px;
    cursor: pointer;
    border-bottom: 1px solid var(--border-color);
    transition: background 0.2s ease;
    display: flex;
    align-items: center;
    gap: 12px;
}

.search-result-item:hover {
    background: var(--bg-color);
}

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

.search-result-item img {
    width: 40px;
    height: 40px;
    object-fit: cover;
    border-radius: 6px;
}

.search-result-info {
    flex: 1;
}

.search-result-info h4 {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.search-result-info p {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Cart Section */
.cart-section {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 20px;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    max-height: calc(100vh - 300px);
}

.cart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
}

.cart-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.cart-count {
    background: var(--primary-color);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

.cart-items {
    flex: 1;
    overflow-y: auto;
    margin-bottom: 20px;
}

.empty-cart {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-secondary);
}

.empty-cart i {
    font-size: 3rem;
    margin-bottom: 15px;
    opacity: 0.3;
}

.cart-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background: var(--bg-color);
    border-radius: 8px;
    margin-bottom: 10px;
}

.cart-item-image {
    width: 50px;
    height: 50px;
    object-fit: cover;
    border-radius: 6px;
}

.cart-item-info {
    flex: 1;
}

.cart-item-name {
    font-weight: 600;
    margin-bottom: 4px;
    font-size: 0.875rem;
}

.cart-item-details {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.cart-item-price {
    font-weight: 600;
    color: var(--primary-color);
}

.cart-item-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.quantity-control {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 4px;
}

.quantity-control button {
    background: none;
    border: none;
    width: 24px;
    height: 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: background 0.2s ease;
}

.quantity-control button:hover {
    background: var(--bg-color);
}

.quantity-control input {
    width: 40px;
    border: none;
    text-align: center;
    font-weight: 600;
}

.cart-item-remove {
    background: var(--danger-color);
    color: white;
    border: none;
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.875rem;
    transition: background 0.3s ease;
}

.cart-item-remove:hover {
    background: #dc2626;
}

.cart-footer {
    border-top: 2px solid var(--border-color);
    padding-top: 20px;
}

.cart-totals {
    margin-bottom: 20px;
}

.total-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
    font-size: 0.875rem;
}

.total-row.total-final {
    font-size: 1.25rem;
    font-weight: 700;
    padding-top: 10px;
    border-top: 2px solid var(--border-color);
    margin-top: 10px;
}

.cart-actions {
    display: flex;
    gap: 10px;
}

/* POS Right */
.pos-right {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.customer-section,
.quick-products {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 20px;
    box-shadow: var(--shadow);
}

.customer-section h3,
.quick-products h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.customer-search {
    position: relative;
    margin-bottom: 15px;
}

.customer-search input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.875rem;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

.customer-search input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.customer-search-results {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-top: 5px;
    max-height: 200px;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    z-index: 100;
    display: none;
}

.customer-search-results.show {
    display: block;
}

.customer-search-result-item {
    padding: 12px 16px;
    cursor: pointer;
    border-bottom: 1px solid var(--border-color);
    transition: background 0.2s ease;
}

.customer-search-result-item:hover {
    background: var(--bg-color);
}

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

.customer-search-result-item h4 {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.customer-search-result-item p {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.selected-customer-info {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

.customer-info-card {
    background: var(--bg-color);
    padding: 12px;
    border-radius: 8px;
}

.customer-info-card strong {
    display: block;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.customer-info-details {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.customer-select {
    display: flex;
    gap: 10px;
    margin-top: 15px;
}

.customer-select select {
    flex: 1;
    padding: 10px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-family: inherit;
}

.quick-products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 10px;
}

.quick-product-item {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
}

.quick-product-item:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.quick-product-item img {
    width: 100%;
    height: 80px;
    object-fit: cover;
    border-radius: 6px;
    margin-bottom: 8px;
}

.quick-product-item p {
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.quick-product-item span {
    font-size: 0.7rem;
    color: var(--text-secondary);
}

/* Products Page */
.page-controls {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.search-box {
    flex: 1;
    min-width: 200px;
    position: relative;
    display: flex;
    align-items: center;
}

.search-box i {
    position: absolute;
    left: 12px;
    color: var(--text-secondary);
}

.search-box input {
    width: 100%;
    padding: 12px 12px 12px 40px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.page-controls select {
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-family: inherit;
    min-width: 150px;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
}

.product-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 20px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.product-card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 15px;
    background: var(--bg-color);
}

.product-card-info h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.product-card-info p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.product-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

.product-price-container {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.product-mrp {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-decoration: line-through;
}

.product-price {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.product-discount-badge {
    background: var(--danger-color);
    color: white;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
}

.product-quantity {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.product-actions {
    display: flex;
    gap: 8px;
}

/* Customers Page */
.customers-table-container {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 20px;
    box-shadow: var(--shadow);
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table thead {
    background: var(--bg-color);
}

.data-table th {
    padding: 12px;
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 2px solid var(--border-color);
}

.data-table td {
    padding: 16px 12px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

.data-table tbody tr:hover {
    background: var(--bg-color);
}

/* Transactions Page */
.transactions-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.summary-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 20px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 15px;
}

.summary-icon {
    width: 50px;
    height: 50px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
}

.summary-icon.sales {
    background: linear-gradient(135deg, var(--success-color), #059669);
}

.summary-icon.transactions {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
}

.summary-icon.items {
    background: linear-gradient(135deg, var(--warning-color), #d97706);
}

.summary-icon.expenses {
    background: linear-gradient(135deg, var(--danger-color), #dc2626);
}

.summary-icon.net {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
}

.summary-content h3 {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 5px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.summary-content p {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.transactions-table-container {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 20px;
    box-shadow: var(--shadow);
    overflow-x: auto;
}

.entry-type {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.entry-type.sale {
    background: #d1fae5;
    color: var(--success-color);
}

.entry-type.expense {
    background: #fee2e2;
    color: var(--danger-color);
}

.payment-badge.expense-badge {
    background: #fee2e2;
    color: var(--danger-color);
}

.date-filter,
.type-filter {
    padding: 10px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-family: inherit;
    min-width: 150px;
}

/* Settings Page */
.settings-container {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.settings-section {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 25px;
    box-shadow: var(--shadow);
}

.settings-section h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.logo-preview,
.image-preview {
    margin-top: 10px;
}

.logo-preview img,
.image-preview img {
    max-width: 200px;
    max-height: 200px;
    border-radius: 8px;
    border: 2px solid var(--border-color);
}

.users-list {
    margin-bottom: 20px;
}

.user-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background: var(--bg-color);
    border-radius: 8px;
    margin-bottom: 10px;
}

.user-item-info {
    flex: 1;
}

.user-item-info h4 {
    font-weight: 600;
    margin-bottom: 4px;
}

.user-item-info p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.user-item-actions {
    display: flex;
    gap: 8px;
}

.data-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: inherit;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-secondary {
    background: var(--card-bg);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-color);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-small {
    padding: 8px 16px;
    font-size: 0.875rem;
}

.btn-danger {
    background: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background: #dc2626;
}

.btn-save {
    background: var(--primary-color);
    color: white;
}

.btn-save:hover {
    background: var(--primary-dark);
}

.btn-cancel {
    background: var(--card-bg);
    color: var(--text-secondary);
    border: 2px solid var(--border-color);
}

.btn-cancel:hover {
    background: var(--bg-color);
}

.action-btn {
    padding: 6px 12px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.875rem;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.action-btn.edit {
    background: #fef3c7;
    color: #d97706;
}

.action-btn.edit:hover {
    background: #fde68a;
}

.action-btn.delete {
    background: #fee2e2;
    color: var(--danger-color);
}

.action-btn.delete:hover {
    background: #fecaca;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    overflow-y: auto;
    padding: 20px;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--card-bg);
    border-radius: 12px;
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: modalSlideIn 0.3s ease;
    display: flex;
    flex-direction: column;
}

.scanner-modal {
    max-width: 800px;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 5px;
    transition: color 0.3s ease;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 24px;
    flex: 1;
    overflow-y: auto;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 24px;
    border-top: 1px solid var(--border-color);
}

#barcodeScannerContainer,
#qrScannerContainer {
    width: 100%;
    min-height: 300px;
    background: var(--bg-color);
    border-radius: 8px;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.manual-entry {
    display: flex;
    gap: 10px;
}

.manual-entry input {
    flex: 1;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-family: inherit;
}

/* Invoice */
.invoice-content {
    max-width: 800px;
}

.invoice-actions {
    display: flex;
    gap: 10px;
    align-items: center;
}

#invoiceBody {
    padding: 40px;
    background: white;
}

.invoice-header {
    text-align: center;
    margin-bottom: 40px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
}

.invoice-header h1 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.invoice-shop-info {
    text-align: left;
    margin-bottom: 30px;
}

.invoice-shop-info p {
    margin: 5px 0;
    color: var(--text-secondary);
}

.invoice-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 30px;
}

.invoice-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 30px;
}

.invoice-table th {
    background: var(--bg-color);
    padding: 12px;
    text-align: left;
    font-weight: 600;
    border-bottom: 2px solid var(--border-color);
}

.invoice-table td {
    padding: 12px;
    border-bottom: 1px solid var(--border-color);
}

.invoice-table tfoot td {
    font-weight: 700;
    border-top: 2px solid var(--border-color);
    border-bottom: none;
}

.invoice-total {
    text-align: right;
    font-size: 1.25rem;
    color: var(--text-primary);
}

.invoice-payment-details {
    margin-top: 30px;
    padding: 20px;
    background: var(--bg-color);
    border-radius: 8px;
}

.invoice-payment-details h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.payment-info-row {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

.payment-info-row:last-child {
    border-bottom: none;
}

.return-amount-row {
    background: #d1fae5;
    padding: 12px;
    border-radius: 6px;
    margin-top: 10px;
}

.credit-note {
    background: #fef3c7;
    padding: 12px;
    border-radius: 6px;
    margin-top: 10px;
}

.payment-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.payment-badge.cash-badge {
    background: #d1fae5;
    color: var(--success-color);
}

.payment-badge.other-badge {
    background: #dbeafe;
    color: #2563eb;
}

.payment-badge.credit-badge {
    background: #fef3c7;
    color: var(--warning-color);
}

.payment-summary {
    background: var(--bg-color);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.summary-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
    font-size: 0.875rem;
}

.summary-row.total-row {
    font-size: 1.125rem;
    font-weight: 700;
    padding-top: 10px;
    border-top: 2px solid var(--border-color);
    margin-top: 10px;
}

.return-amount {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 10px;
    padding: 10px;
    background: #d1fae5;
    border-radius: 6px;
    color: var(--success-color);
    font-weight: 600;
}

.invoice-payment-details {
    margin-top: 30px;
    padding: 20px;
    background: var(--bg-color);
    border-radius: 8px;
}

.invoice-payment-details h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.payment-info-row {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

.payment-info-row:last-child {
    border-bottom: none;
}

.return-amount-row {
    background: #d1fae5;
    padding: 12px;
    border-radius: 6px;
    margin-top: 10px;
}

.credit-note {
    background: #fef3c7;
    padding: 12px;
    border-radius: 6px;
    margin-top: 10px;
}

.payment-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.payment-badge.cash-badge {
    background: #d1fae5;
    color: var(--success-color);
}

.payment-badge.other-badge {
    background: #dbeafe;
    color: #2563eb;
}

.payment-badge.credit-badge {
    background: #fef3c7;
    color: var(--warning-color);
}

.payment-summary {
    background: var(--bg-color);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.summary-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
    font-size: 0.875rem;
}

.summary-row.total-row {
    font-size: 1.125rem;
    font-weight: 700;
    padding-top: 10px;
    border-top: 2px solid var(--border-color);
    margin-top: 10px;
}

.return-amount {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 10px;
    padding: 10px;
    background: #d1fae5;
    border-radius: 6px;
    color: var(--success-color);
    font-weight: 600;
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--success-color);
    color: white;
    padding: 16px 24px;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    display: none;
    align-items: center;
    gap: 12px;
    z-index: 2000;
    animation: toastSlideIn 0.3s ease;
}

.toast.show {
    display: flex;
}

.toast.error {
    background: var(--danger-color);
}

@keyframes toastSlideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Footer */
.app-footer {
    text-align: center;
    padding: 30px 20px;
    color: var(--text-secondary);
    margin-top: 40px;
    background: var(--card-bg);
    border-top: 1px solid var(--border-color);
}

.app-footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.app-footer a:hover {
    text-decoration: underline;
}

.app-footer .footer-link {
    color: var(--primary-color);
}

.app-footer .footer-link:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

.app-footer .bmc-logo {
    display: inline-block;
    margin-top: 1rem;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.app-footer .bmc-logo:hover {
    transform: scale(1.05);
    opacity: 0.9;
}

.app-footer .bmc-logo img {
    height: 60px;
    width: 217px;
}

.app-footer .view-all-apps-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin: 1rem auto 0 auto;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(45deg, var(--primary-color), var(--primary-dark));
    color: #ffffff;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    width: fit-content;
}

.app-footer .view-all-apps-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    text-decoration: none;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .pos-container {
        grid-template-columns: 1fr;
    }

    .pos-right {
        order: -1;
    }

    .header-bottom {
        flex-wrap: wrap;
    }

    .main-nav {
        width: 100%;
        order: 1;
        margin-bottom: 8px;
        justify-content: center;
    }

    .header-user-section {
        width: 100%;
        order: 2;
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .header-top {
        padding: 8px 12px;
    }

    .shop-name {
        font-size: 1rem;
    }

    .shop-logo-container img {
        width: 32px;
        height: 32px;
    }

    .header-bottom {
        padding: 6px 12px;
        gap: 10px;
        flex-wrap: wrap;
    }

    .main-nav {
        gap: 4px;
        flex: 1;
        min-width: 0;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .main-nav::-webkit-scrollbar {
        display: none;
    }

    .nav-btn {
        padding: 8px 10px;
        flex-shrink: 0;
    }

    .nav-btn i {
        font-size: 0.9rem;
    }

    .nav-text {
        display: none;
    }

    .header-user-section {
        gap: 8px;
        flex-shrink: 0;
    }

    .user-name {
        font-size: 0.75rem;
        max-width: 80px;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .logout-text {
        display: none;
    }

    .btn-small {
        padding: 8px 10px;
        min-width: auto;
    }

    .main-content {
        padding: 12px;
    }

    .products-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 15px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .transactions-summary {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .page-header h2 {
        font-size: 1.5rem;
    }

    .header-actions {
        width: 100%;
        flex-wrap: wrap;
        gap: 8px;
    }

    .cart-item {
        flex-wrap: wrap;
        padding: 12px;
    }

    .cart-item-image {
        width: 40px;
        height: 40px;
    }

    .quick-products-grid {
        grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
        gap: 8px;
    }

    .pos-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .pos-header h2 {
        font-size: 1.25rem;
    }

    .pos-controls {
        width: 100%;
        flex-direction: column;
    }

    .pos-controls .btn {
        width: 100%;
        justify-content: center;
    }

    .customer-section,
    .quick-products {
        padding: 15px;
    }

    .cart-section {
        padding: 15px;
        max-height: calc(100vh - 250px);
    }

    .modal-content {
        margin: 10px;
        max-height: calc(100vh - 20px);
    }

    .modal-header,
    .modal-body,
    .modal-footer {
        padding: 15px;
    }

    .data-table {
        font-size: 0.8rem;
    }

    .data-table th,
    .data-table td {
        padding: 8px 6px;
    }
}

@media (max-width: 480px) {
    .header-top {
        padding: 6px 10px;
    }

    .shop-name {
        font-size: 0.9rem;
    }

    .shop-logo-container img {
        width: 28px;
        height: 28px;
    }

    .header-bottom {
        padding: 5px 10px;
        gap: 8px;
    }

    .main-nav {
        gap: 3px;
    }

    .nav-btn {
        padding: 6px 8px;
        min-width: 36px;
    }

    .nav-btn i {
        font-size: 0.85rem;
    }

    .user-name {
        font-size: 0.7rem;
        max-width: 60px;
    }

    .btn-small {
        padding: 6px 8px;
        font-size: 0.75rem;
    }

    .main-content {
        padding: 10px;
    }

    .page-header h2 {
        font-size: 1.25rem;
    }

    .modal-content {
        margin: 5px;
        max-height: calc(100vh - 10px);
        border-radius: 8px;
    }

    .modal-header,
    .modal-body,
    .modal-footer {
        padding: 12px;
    }

    .products-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .product-card {
        padding: 15px;
    }

    .data-table {
        font-size: 0.75rem;
    }

    .data-table th,
    .data-table td {
        padding: 6px 4px;
    }

    .btn {
        padding: 10px 16px;
        font-size: 0.875rem;
    }

    .btn-small {
        padding: 6px 12px;
        font-size: 0.75rem;
    }

    .cart-item {
        padding: 10px;
        gap: 10px;
    }

    .cart-item-name {
        font-size: 0.8rem;
    }

    .cart-item-details {
        font-size: 0.7rem;
    }

    .summary-card {
        padding: 15px;
    }

    .summary-content p {
        font-size: 1.25rem;
    }

    .quick-product-item {
        padding: 8px;
    }

    .quick-product-item p {
        font-size: 0.7rem;
    }

    .customer-search input {
        font-size: 0.875rem;
        padding: 10px 12px;
    }

    .product-search input {
        font-size: 0.875rem;
        padding: 10px 12px;
    }

    .invoice-details {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    #invoiceBody {
        padding: 20px;
    }
}

@media print {
    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    body {
        background: white;
        margin: 0;
        padding: 0;
    }

    .container,
    .app-header,
    .main-content,
    .app-footer,
    .toast,
    .modal:not(#invoiceModal) {
        display: none !important;
    }

    #invoiceModal {
        display: block !important;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: white;
        padding: 0;
        margin: 0;
        z-index: 9999;
        overflow: visible;
    }

    #invoiceModal .modal-content {
        box-shadow: none;
        max-width: 100%;
        width: 100%;
        height: auto;
        margin: 0;
        padding: 20px;
        border: none;
        border-radius: 0;
        overflow: visible;
    }

    #invoiceModal .modal-header {
        display: none !important;
    }

    #invoiceBody {
        padding: 0;
        margin: 0;
        page-break-inside: avoid;
    }

    @page {
        size: A4;
        margin: 15mm;
    }
}