/* ========================================
   IT សាច់គោអាំង - Professional POS System
   Modern, Responsive, Production-Ready
   ======================================== */

/* CSS Variables */
:root {
    /* Brand Colors */
    --primary: #1565C0;
    --primary-dark: #0D47A1;
    --primary-light: #42A5F5;
    
    --secondary: #FF6F00;
    --secondary-dark: #E65100;
    --secondary-light: #FF9800;
    
    --gold: #FFD700;
    --gold-dark: #FFA500;
    --green: #00C853;
    --green-dark: #00A344;
    
    /* Neutral Colors */
    --gray-50: #F8F9FA;
    --gray-100: #E9ECEF;
    --gray-200: #DEE2E6;
    --gray-300: #CED4DA;
    --gray-400: #ADB5BD;
    --gray-500: #6C757D;
    --gray-600: #495057;
    --gray-700: #343A40;
    --gray-800: #212529;
    --gray-900: #0D1117;
    
    /* Dark Theme */
    --bg-primary: #0D1117;
    --bg-secondary: #161B22;
    --bg-tertiary: #1C2128;
    --bg-elevated: #22272E;
    --bg-overlay: rgba(13, 17, 23, 0.95);
    
    /* Text Colors */
    --text-primary: #FFFFFF;
    --text-secondary: #8B949E;
    --text-tertiary: #6E7681;
    --text-muted: #484F58;
    
    /* Border Colors */
    --border-light: rgba(255, 255, 255, 0.08);
    --border-medium: rgba(255, 255, 255, 0.12);
    --border-strong: rgba(255, 255, 255, 0.18);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow: 0 2px 8px 0 rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 12px 0 rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 8px 24px 0 rgba(0, 0, 0, 0.6);
    --shadow-xl: 0 16px 48px 0 rgba(0, 0, 0, 0.7);
    
    /* Typography */
    --font-khmer: 'Kantumruy Pro', 'Battambang', system-ui, sans-serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* Khmer Text */
[lang="km"], .khmer {
    font-family: var(--font-khmer);
}

/* ======== NAVBAR ======== */
.navbar {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-medium);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(20px);
}

.navbar-content {
    max-width: 100%;
    padding: var(--space-4) var(--space-6);
    display: flex;
    align-items: center;
    gap: var(--space-6);
}

.navbar-left {
    flex-shrink: 0;
}

.brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.brand-logo {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
}

.brand-logo svg {
    width: 100%;
    height: 100%;
    filter: drop-shadow(0 2px 8px rgba(255, 215, 0, 0.3));
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-name {
    font-family: var(--font-khmer);
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1.2;
    background: linear-gradient(135deg, var(--gold), var(--gold-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.brand-subtitle {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

.search-container {
    position: relative;
    width: 100%;
}

.search-icon {
    position: absolute;
    left: var(--space-4);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: var(--space-3) var(--space-4) var(--space-3) var(--space-10);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: all var(--transition);
}

.search-input:focus {
    outline: none;
    background: var(--bg-elevated);
    border-color: var(--gold);
    box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.1);
}

.search-input::placeholder {
    color: var(--text-tertiary);
    font-family: var(--font-khmer);
}

.navbar-right {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.icon-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition);
}

.icon-btn:hover {
    background: var(--bg-elevated);
    border-color: var(--gold);
    transform: translateY(-2px);
}

.date-time {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-family: var(--font-khmer);
}

/* ======== MAIN CONTENT ======== */
.main-content {
    display: grid;
    grid-template-columns: 280px 1fr 420px;
    gap: var(--space-6);
    padding: var(--space-6);
    min-height: calc(100vh - 80px);
}

/* ======== SIDEBAR ======== */
.sidebar {
    background: var(--bg-secondary);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    height: fit-content;
    position: sticky;
    top: 100px;
}

.sidebar-header h2 {
    font-family: var(--font-khmer);
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--space-5);
    line-height: 1.3;
}

.category-nav {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.category-btn {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    background: transparent;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
    text-align: left;
    width: 100%;
}

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

.category-btn.active {
    background: linear-gradient(135deg, var(--gold), var(--gold-dark));
    border-color: var(--gold);
    color: var(--gray-900);
}

.category-btn.active .category-icon {
    color: var(--gray-900);
}

.category-icon {
    flex-shrink: 0;
    color: var(--text-tertiary);
    transition: color var(--transition);
}

.category-btn:hover .category-icon,
.category-btn.active .category-icon {
    color: currentColor;
}

.category-text {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.category-name-km {
    font-family: var(--font-khmer);
    font-size: 0.9375rem;
    font-weight: 600;
    line-height: 1.2;
}

.category-name-en {
    font-size: 0.75rem;
    opacity: 0.8;
}

.category-badge {
    padding: 2px 8px;
    background: var(--bg-elevated);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    min-width: 24px;
    text-align: center;
}

.category-btn.active .category-badge {
    background: rgba(0, 0, 0, 0.15);
}

/* ======== MENU SECTION ======== */
.menu-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.menu-title h2 {
    font-family: var(--font-khmer);
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1.3;
}

.item-count {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: var(--space-1);
}

.menu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-5);
}

.menu-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-slow);
    cursor: pointer;
}

.menu-card:hover {
    transform: translateY(-4px);
    border-color: var(--gold);
    box-shadow: var(--shadow-lg);
}

.menu-card-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, var(--gray-700), var(--gray-800));
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.menu-card-image::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.1), rgba(0, 200, 83, 0.1));
    opacity: 0;
    transition: opacity var(--transition);
}

.menu-card:hover .menu-card-image::before {
    opacity: 1;
}

.menu-card-image svg {
    width: 80px;
    height: 80px;
    color: var(--text-tertiary);
}

.menu-card-body {
    padding: var(--space-5);
}

.menu-card-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.menu-card-price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gold);
    margin-bottom: var(--space-4);
}

.btn-add-cart {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    background: linear-gradient(135deg, var(--green), var(--green-dark));
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-weight: 600;
    font-size: 0.9375rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    cursor: pointer;
    transition: all var(--transition);
}

.btn-add-cart:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 200, 83, 0.4);
}

/* ======== ORDER PANEL ======== */
.order-panel {
    background: var(--bg-secondary);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
    height: fit-content;
    position: sticky;
    top: 100px;
    max-height: calc(100vh - 120px);
}

.order-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--border-light);
}

.order-header h2 {
    font-family: var(--font-khmer);
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1.3;
}

.btn-clear {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: transparent;
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    color: var(--text-secondary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition);
}

.btn-clear:hover {
    background: rgba(211, 47, 47, 0.1);
    border-color: #D32F2F;
    color: #D32F2F;
}

/* Customer Section */
.customer-section {
    padding: var(--space-4);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.form-label {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    font-family: var(--font-khmer);
}

.form-label svg {
    color: var(--gold);
}

.form-control {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    background: var(--bg-secondary);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-size: 0.9375rem;
    transition: all var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--gold);
    box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.1);
}

.form-control::placeholder {
    color: var(--text-tertiary);
}

/* Order Items */
.order-items {
    flex: 1;
    overflow-y: auto;
    min-height: 200px;
    max-height: 400px;
}

.order-items::-webkit-scrollbar {
    width: 6px;
}

.order-items::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
}

.order-items::-webkit-scrollbar-thumb {
    background: var(--gold);
    border-radius: var(--radius-sm);
}

.empty-order {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-8) var(--space-4);
    color: var(--text-tertiary);
}

.empty-order svg {
    margin-bottom: var(--space-4);
    opacity: 0.5;
}

.empty-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--space-1);
}

.empty-subtitle {
    font-size: 0.875rem;
}

.order-item {
    padding: var(--space-4);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-3);
}

.order-item-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: var(--space-3);
}

.order-item-name {
    font-weight: 600;
    font-size: 0.9375rem;
}

.btn-remove {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
}

.btn-remove:hover {
    background: rgba(211, 47, 47, 0.1);
    color: #D32F2F;
}

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

.quantity-controls {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-1);
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
}

.qty-btn {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition);
}

.qty-btn:hover {
    background: var(--gold);
    color: var(--gray-900);
}

.qty-value {
    min-width: 32px;
    text-align: center;
    font-weight: 600;
}

.order-item-price {
    font-weight: 700;
    color: var(--gold);
    font-size: 1rem;
}

/* Order Summary */
.order-summary {
    padding: var(--space-4);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
}

.summary-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-3);
    font-size: 0.9375rem;
}

.summary-row:last-child {
    margin-bottom: 0;
}

.summary-row span:first-child {
    color: var(--text-secondary);
}

.summary-row span:last-child {
    font-weight: 600;
}

.summary-divider {
    height: 1px;
    background: var(--border-light);
    margin: var(--space-3) 0;
}

.total-row {
    font-size: 1.25rem;
    font-weight: 700;
}

.total-row span:first-child {
    color: var(--text-primary);
    font-family: var(--font-khmer);
}

.total-row span:last-child {
    color: var(--gold);
}

/* Checkout Button */
.btn-checkout {
    width: 100%;
    padding: var(--space-4);
    background: linear-gradient(135deg, var(--gold), var(--gold-dark));
    border: none;
    border-radius: var(--radius-lg);
    color: var(--gray-900);
    font-weight: 700;
    font-size: 1rem;
    font-family: var(--font-khmer);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    cursor: pointer;
    transition: all var(--transition-slow);
    box-shadow: 0 4px 12px rgba(255, 215, 0, 0.3);
}

.btn-checkout:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(255, 215, 0, 0.4);
}

.btn-checkout:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ======== MODAL ======== */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: var(--bg-overlay);
    backdrop-filter: blur(10px);
}

.modal-dialog {
    position: relative;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-6);
    border-bottom: 1px solid var(--border-light);
}

.modal-header h3 {
    font-family: var(--font-khmer);
    font-size: 1.5rem;
    font-weight: 700;
}

.modal-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
}

.modal-close:hover {
    background: rgba(211, 47, 47, 0.1);
    border-color: #D32F2F;
    color: #D32F2F;
}

.modal-body {
    padding: var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.payment-summary {
    padding: var(--space-5);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
}

.summary-card {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

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

.summary-item .label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.summary-item .value {
    font-weight: 600;
}

.summary-item.highlight {
    padding-top: var(--space-4);
    border-top: 1px solid var(--border-light);
}

.summary-item.highlight .label {
    color: var(--text-primary);
    font-weight: 600;
}

.summary-item.highlight .value {
    font-size: 1.5rem;
    color: var(--gold);
}

.payment-methods h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-4);
}

.payment-options {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-3);
}

.payment-option input {
    display: none;
}

.option-card {
    padding: var(--space-5) var(--space-4);
    background: var(--bg-tertiary);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    cursor: pointer;
    transition: all var(--transition);
}

.option-card:hover {
    border-color: var(--gold);
}

.payment-option input:checked + .option-card {
    background: linear-gradient(135deg, var(--gold), var(--gold-dark));
    border-color: var(--gold);
    color: var(--gray-900);
}

.option-card span {
    font-size: 0.875rem;
    font-weight: 600;
    text-align: center;
    font-family: var(--font-khmer);
}

.qr-display {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-5);
    padding: var(--space-5);
    background: var(--bg-tertiary);
    border-radius: var(--radius-xl);
}

.qr-title {
    font-family: var(--font-khmer);
    font-size: 1.125rem;
    font-weight: 600;
    text-align: center;
    color: var(--gold);
    line-height: 1.5;
}

.qr-container {
    width: 320px;
    height: 320px;
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-xl);
    border: 4px solid var(--gold);
}

.qr-container img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.qr-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    color: var(--gray-400);
    text-align: center;
}

.qr-placeholder svg {
    color: var(--gray-300);
}

.qr-note {
    font-size: 0.75rem;
    color: var(--gray-500);
}

.btn-download-qr {
    width: 100%;
    max-width: 320px;
    padding: var(--space-3) var(--space-5);
    background: var(--gold);
    border: none;
    border-radius: var(--radius-md);
    color: var(--gray-900);
    font-family: var(--font-khmer);
    font-weight: 600;
    font-size: 0.9375rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    cursor: pointer;
    transition: all var(--transition);
}

.btn-download-qr:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 215, 0, 0.4);
}

.qr-instruction {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-align: center;
    padding: var(--space-3);
    background: rgba(255, 215, 0, 0.05);
    border-radius: var(--radius-md);
    max-width: 400px;
}

.qr-instruction svg {
    flex-shrink: 0;
    color: var(--gold);
}

.modal-footer {
    padding: var(--space-6);
    border-top: 1px solid var(--border-light);
    display: flex;
    gap: var(--space-3);
}

.btn-secondary {
    flex: 1;
    padding: var(--space-3) var(--space-5);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}

.btn-secondary:hover {
    background: var(--bg-elevated);
}

.btn-primary {
    flex: 2;
    padding: var(--space-3) var(--space-5);
    background: linear-gradient(135deg, var(--green), var(--green-dark));
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    cursor: pointer;
    transition: all var(--transition-slow);
    box-shadow: 0 4px 12px rgba(0, 200, 83, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 200, 83, 0.4);
}

/* Settings Modal */
.settings-section {
    padding: var(--space-5);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
}

.settings-section h4 {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-4);
    color: var(--gold);
}

.settings-section .form-group {
    margin-bottom: var(--space-4);
}

.settings-section .form-group:last-child {
    margin-bottom: 0;
}

.settings-section label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.settings-section small {
    display: block;
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-top: var(--space-1);
}

.qr-upload {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
}

.qr-preview {
    width: 200px;
    height: 200px;
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    display: flex;
    align-items: center;
    justify-content: center;
}

.qr-preview img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.btn-upload {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    background: var(--gold);
    border: none;
    border-radius: var(--radius-md);
    color: var(--gray-900);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}

.btn-upload:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 215, 0, 0.4);
}

/* ======== TOAST ======== */
.toast-container {
    position: fixed;
    top: var(--space-6);
    right: var(--space-6);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.toast {
    padding: var(--space-4) var(--space-5);
    background: var(--bg-elevated);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    animation: toastSlideIn 0.3s ease-out;
}

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

.toast.success {
    border-color: var(--green);
}

.toast.error {
    border-color: #D32F2F;
}

.toast.info {
    border-color: var(--primary);
}

/* ======== LOADING ======== */
.loading-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--bg-overlay);
    backdrop-filter: blur(10px);
    z-index: 3000;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: var(--space-4);
}

.loading-overlay.active {
    display: flex;
}

.spinner {
    width: 60px;
    height: 60px;
    border: 4px solid var(--border-medium);
    border-top-color: var(--gold);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading-overlay p {
    font-size: 1rem;
    color: var(--text-secondary);
}

/* ======== RESPONSIVE ======== */
@media (max-width: 1400px) {
    .main-content {
        grid-template-columns: 260px 1fr 380px;
    }
}

@media (max-width: 1200px) {
    .main-content {
        grid-template-columns: 240px 1fr 360px;
    }
    
    .menu-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    }
}

@media (max-width: 1024px) {
    .main-content {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    .sidebar {
        position: static;
        width: 100%;
    }
    
    .category-nav {
        flex-direction: row;
        overflow-x: auto;
        padding-bottom: var(--space-2);
    }
    
    .category-btn {
        flex-shrink: 0;
        min-width: 140px;
    }
    
    .order-panel {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        max-height: 70vh;
        border-radius: var(--radius-xl) var(--radius-xl) 0 0;
        transform: translateY(100%);
        transition: transform var(--transition-slow);
        z-index: 500;
    }
    
    .order-panel.active {
        transform: translateY(0);
    }
    
    .menu-grid {
        grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    }
}

@media (max-width: 768px) {
    .navbar-content {
        flex-wrap: wrap;
        gap: var(--space-4);
    }
    
    .navbar-center {
        order: 3;
        flex-basis: 100%;
        max-width: none;
    }
    
    .date-time {
        display: none;
    }
    
    .menu-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    }
    
    .payment-options {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .navbar-content {
        padding: var(--space-3) var(--space-4);
    }
    
    .brand-name {
        font-size: 1.125rem;
    }
    
    .menu-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    .modal-dialog {
        width: 95%;
        max-height: 95vh;
    }
    
    .qr-container {
        width: 240px;
        height: 240px;
    }
}