/* NexusPOS Main Stylesheet */
/* CSS Variables for Theming */
:root {
    /* Light Theme */
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #64748b;
    --accent-color: #f59e0b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    
    /* Background Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-card: #ffffff;
    
    /* Text Colors */
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --text-on-primary: #ffffff;
    
    /* Border Colors */
    --border-color: #e2e8f0;
    --border-dark: #cbd5e1;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Typography */
    --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Z-index layers */
    --z-dropdown: 10;
    --z-sticky: 20;
    --z-modal: 30;
    --z-popover: 40;
    --z-toast: 50;
    --z-tooltip: 60;
}

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

html {
    font-size: 16px;
    height: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    line-height: 1.5;
    height: 100%;
    overflow-x: hidden;
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.875rem; }

p {
    margin-bottom: var(--spacing-md);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-dark);
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    color: white;
}

.loading-content {
    text-align: center;
    animation: fadeIn 0.5s ease;
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-lg);
}

.loading-progress {
    width: 200px;
    height: 4px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    margin-top: var(--spacing-lg);
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: white;
    width: 0%;
    animation: progress 2s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@keyframes progress {
    0% { width: 0%; }
    50% { width: 70%; }
    100% { width: 100%; }
}

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

/* Utility Classes */
.hidden {
    display: none !important;
}

.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.items-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-2 { gap: var(--spacing-sm); }
.gap-4 { gap: var(--spacing-md); }
.gap-8 { gap: var(--spacing-lg); }

.mt-2 { margin-top: var(--spacing-sm); }
.mt-4 { margin-top: var(--spacing-md); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-4 { margin-bottom: var(--spacing-md); }

.p-2 { padding: var(--spacing-sm); }
.p-4 { padding: var(--spacing-md); }
.p-8 { padding: var(--spacing-lg); }

.rounded { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }

.shadow { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }

.text-sm { font-size: 0.875rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }

.text-center { text-align: center; }
.text-right { text-align: right; }

.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.cursor-pointer { cursor: pointer; }
.user-select-none { user-select: none; }

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border-dark);
}

/* Focus Styles */
:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Skip to main content */
.skip-to-content {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    z-index: var(--z-popover);
    text-decoration: none;
}

.skip-to-content:focus {
    top: 0;
}

/* Forms */
input, select, textarea {
    font-family: inherit;
    font-size: inherit;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

input:disabled, select:disabled, textarea:disabled {
    background: var(--bg-tertiary);
    color: var(--text-muted);
    cursor: not-allowed;
}

/* App Container */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    background: var(--bg-primary);
}

/* App Header */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    z-index: var(--z-sticky);
    position: sticky;
    top: 0;
    gap: var(--spacing-lg);
}

.header-left,
.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex-shrink: 0;
}

.header-center {
    flex: 1;
    max-width: 600px;
}

.menu-toggle {
    background: none;
    border: none;
    width: 40px;
    height: 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 4px;
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
    color: var(--text-primary);
}

.menu-toggle:hover {
    background: var(--bg-tertiary);
}

.menu-toggle span {
    width: 20px;
    height: 2px;
    background: currentColor;
    transition: transform var(--transition-fast);
}

.app-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    white-space: nowrap;
}

.app-title span {
    color: var(--accent-color);
}

.store-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
    font-size: 0.875rem;
}

.network-status {
    color: var(--success-color);
    font-weight: 600;
}

.network-status.offline {
    color: var(--danger-color);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.quick-actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
}

.quick-action {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.875rem;
    white-space: nowrap;
}

.quick-action:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--border-dark);
    transform: translateY(-1px);
}

.quick-action .icon {
    font-size: 1.25rem;
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.user-avatar {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.875rem;
    flex-shrink: 0;
}

.user-details {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.user-role {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.header-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    font-size: 1.25rem;
}

.header-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--border-dark);
}

.header-btn .badge {
    position: absolute;
    top: -4px;
    right: -4px;
    background: var(--danger-color);
    color: white;
    font-size: 0.75rem;
    min-width: 18px;
    height: 18px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

/* Main Content */
.main-content {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* Sidebar */
.sidebar {
    width: 280px;
    background: var(--bg-card);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: transform var(--transition-base);
    z-index: var(--z-sticky);
    overflow-y: auto;
}

.sidebar-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}

.sidebar-close {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-md);
}

.sidebar-close:hover {
    background: var(--bg-tertiary);
}

.nav-sections {
    flex: 1;
    padding: var(--spacing-lg);
}

.nav-section {
    margin-bottom: var(--spacing-xl);
}

.nav-section-title {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    transition: all var(--transition-fast);
    text-decoration: none;
    cursor: pointer;
}

.nav-item:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

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

.nav-item .nav-icon {
    font-size: 1.25rem;
    width: 24px;
    text-align: center;
    flex-shrink: 0;
}

.sidebar-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
    flex-shrink: 0;
}

.system-status {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.status-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.status-label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.status-value {
    font-weight: 600;
    color: var(--text-primary);
}

/* Content Area */
.content-area {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg);
    background: var(--bg-primary);
}

.view {
    display: none;
}

.view.active {
    display: block;
    animation: fadeIn var(--transition-base);
}

.view-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

/* POS Container */
.pos-container {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: var(--spacing-lg);
    height: calc(100vh - 180px);
}

.product-grid-container {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.category-tabs {
    display: flex;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    overflow-x: auto;
    flex-shrink: 0;
}

.category-tab {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    white-space: nowrap;
    transition: all var(--transition-fast);
}

.category-tab:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.category-tab.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.product-search {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.product-search input {
    flex: 1;
}

.search-btn,
.barcode-btn {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.25rem;
    transition: all var(--transition-fast);
}

.search-btn:hover,
.barcode-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--border-dark);
}

.product-grid {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    overflow-y: auto;
}

.product-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

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

.product-card.out-of-stock {
    opacity: 0.6;
    filter: grayscale(0.5);
}

.product-card.out-of-stock::after {
    content: "Out of Stock";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(-30deg);
    background: var(--danger-color);
    color: white;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
}

.product-image {
    width: 100%;
    height: 100px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--text-muted);
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-name {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    font-size: 0.875rem;
    line-height: 1.3;
}

.product-price {
    color: var(--primary-color);
    font-weight: 700;
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
}

.product-sku {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
}

.add-to-cart-btn {
    margin-top: auto;
    padding: var(--spacing-sm);
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 600;
    transition: background-color var(--transition-fast);
}

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

.add-to-cart-btn:disabled {
    background: var(--secondary-color);
    cursor: not-allowed;
}

/* Order Panel */
.order-panel {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.order-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
    flex-shrink: 0;
}

.order-info {
    display: flex;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.order-items {
    flex: 1;
    padding: var(--spacing-md);
    overflow-y: auto;
    min-height: 300px;
}

.empty-order {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-muted);
    text-align: center;
}

.order-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
    transition: background-color var(--transition-fast);
}

.order-item:hover {
    background: var(--bg-tertiary);
}

.item-quantity {
    width: 40px;
    text-align: center;
    font-weight: 600;
    flex-shrink: 0;
}

.item-details {
    flex: 1;
}

.item-name {
    font-weight: 600;
    margin-bottom: 2px;
}

.item-modifiers {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.item-price {
    font-weight: 600;
    color: var(--primary-color);
    min-width: 60px;
    text-align: right;
    flex-shrink: 0;
}

.item-actions {
    display: flex;
    gap: var(--spacing-xs);
    flex-shrink: 0;
}

.item-action {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.875rem;
    transition: all var(--transition-fast);
}

.item-action:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.item-action.remove:hover {
    background: var(--danger-color);
    color: white;
    border-color: var(--danger-color);
}

.order-summary {
    padding: var(--spacing-md);
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
    flex-shrink: 0;
}

.summary-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

.summary-row.total {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    padding-top: var(--spacing-sm);
    border-top: 2px solid var(--border-color);
    margin-top: var(--spacing-sm);
}

.order-actions {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    border-top: 1px solid var(--border-color);
    flex-shrink: 0;
}

/* Buttons */
.btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.875rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    user-select: none;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1rem;
}

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

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

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

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

.btn-success:hover {
    background: #0da271;
}

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

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

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

.btn-warning:hover {
    background: #d97706;
}

.btn-discount {
    background: linear-gradient(135deg, #8b5cf6, #6366f1);
    color: white;
}

.btn-tax {
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
}

.btn-pay {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: white;
    font-size: 1rem;
    font-weight: 700;
    grid-column: 2;
}
/* ===== CAMERA SCANNER STYLES ===== */
.camera-scanner-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
}

.scanner-overlay {
    width: 90%;
    max-width: 600px;
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    max-height: 90vh;
}

.scanner-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, #2563eb, #1e40af);
    color: white;
    border-bottom: 1px solid var(--border-color);
}

.scanner-header h3 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
}

.scanner-close {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-md);
    transition: background 0.2s;
}

.scanner-close:hover {
    background: rgba(255, 255, 255, 0.3);
}

.scanner-body {
    position: relative;
    background: #000;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}

.camera-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.scanner-guide {
    position: absolute;
    width: 100%;
    height: 100%;
    pointer-events: none;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.guide-text {
    color: white;
    font-size: 0.875rem;
    margin-bottom: var(--spacing-lg);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.scanner-frame {
    width: 70%;
    max-width: 400px;
    aspect-ratio: 16 / 9;
    border: 3px solid rgba(255, 255, 255, 0.5);
    border-radius: var(--radius-lg);
    box-shadow: 
        inset 0 0 0 1px rgba(255, 255, 255, 0.5),
        0 0 0 9999px rgba(0, 0, 0, 0.5);
    animation: scannerPulse 2s ease-in-out infinite;
}

@keyframes scannerPulse {
    0%, 100% {
        border-color: rgba(255, 255, 255, 0.5);
        box-shadow: 
            inset 0 0 0 1px rgba(255, 255, 255, 0.5),
            0 0 0 9999px rgba(0, 0, 0, 0.5);
    }
    50% {
        border-color: rgba(16, 185, 129, 0.8);
        box-shadow: 
            inset 0 0 0 1px rgba(16, 185, 129, 0.8),
            0 0 0 9999px rgba(0, 0, 0, 0.5);
    }
}

.detection-feedback {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(16, 185, 129, 0.9);
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    font-weight: 600;
    pointer-events: none;
    animation: feedbackPulse 0.3s ease-out;
}

@keyframes feedbackPulse {
    from {
        opacity: 1;
        transform: translate(-50%, -50%) scale(0.8);
    }
    to {
        opacity: 0;
        transform: translate(-50%, -50%) scale(1.1);
    }
}

.scanner-info {
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.scanner-status {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
    padding: var(--spacing-sm);
}

.scanner-footer {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    justify-content: center;
}

.scanner-footer .btn {
    flex: 1;
    max-width: 200px;
}

/* Scanner Controls in POS */
.scanner-controls {
    display: flex;
    gap: var(--spacing-md);
    align-items: stretch;
    margin-bottom: var(--spacing-md);
}

.scanner-controls .barcode-input {
    flex: 1;
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: all 0.2s;
}

.scanner-controls .barcode-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.camera-btn {
    padding: var(--spacing-md) var(--spacing-lg);
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.camera-btn .icon {
    font-size: 1.25rem;
}

.scan-hint {
    display: block;
    margin-top: var(--spacing-sm);
    color: var(--text-muted);
    font-size: 0.75rem;
}

/* Mobile Responsive */
@media (max-width: 640px) {
    .scanner-overlay {
        width: 95%;
        max-height: 95vh;
    }

    .scanner-header h3 {
        font-size: 1rem;
    }

    .scanner-footer {
        flex-direction: column;
    }

    .scanner-footer .btn {
        max-width: 100%;
    }

    .camera-btn {
        flex-direction: column;
        padding: var(--spacing-md);
    }

    .camera-btn .icon {
        font-size: 1.5rem;
    }
}

/* Inventory Management Styles */
.inventory-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.summary-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.2);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.summary-card h4 {
    margin: 0 0 12px 0;
    font-size: 14px;
    opacity: 0.9;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.summary-value {
    font-size: 28px;
    font-weight: bold;
    margin: 0;
}

.summary-card:nth-child(2) {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.summary-card:nth-child(3) {
    background: linear-gradient(135deg, #ffa751 0%, #ffe259 100%);
}

.summary-card:nth-child(4) {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.inventory-filters {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    align-items: center;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 8px 16px;
    border: 1px solid #ddd;
    background: white;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 13px;
    font-weight: 500;
}

.filter-btn:hover,
.filter-btn.active {
    background: #2196F3;
    color: white;
    border-color: #2196F3;
}

.inventory-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.inventory-table thead {
    background: #f5f5f5;
    border-bottom: 2px solid #ddd;
}

.inventory-table th {
    padding: 12px;
    text-align: left;
    font-weight: 600;
    color: #333;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.inventory-table td {
    padding: 12px;
    border-bottom: 1px solid #eee;
}

.inventory-table tbody tr:hover {
    background: #f9f9f9;
}

.btn-tiny {
    padding: 6px 12px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 11px;
    transition: all 0.2s ease;
}

.btn-tiny:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}