:root {
            /* Colors */
            
            --primary-color: #00d4ff;
            --primary-dark: #00b8e6;
            --primary-light: #33dcff;
            --secondary-color: #ff6b35;
            --accent-color: #7c3aed;
            /* Dark Theme Colors */
            
            --bg-primary: #0a0a0a;
            --bg-secondary: #1a1a1a;
            --bg-tertiary: #2a2a2a;
            --bg-card: #1e1e1e;
            --bg-overlay: rgba(0, 0, 0, 0.8);
            /* Text Colors */
            
            --text-primary: #ffffff;
            --text-secondary: #b3b3b3;
            --text-muted: #666666;
            --text-accent: var(--primary-color);
            /* Border Colors */
            
            --border-primary: #333333;
            --border-secondary: #444444;
            --border-accent: var(--primary-color);
            /* Gradients */
            
            --gradient-primary: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
            --gradient-secondary: linear-gradient(135deg, var(--secondary-color) 0%, #ff8a65 100%);
            --gradient-dark: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
            /* Spacing */
            
            --container-max-width: 1200px;
            --section-padding: 80px 0;
            --card-padding: 30px;
            /* Typography */
            
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --font-size-xs: 12px;
            --font-size-sm: 14px;
            --font-size-base: 16px;
            --font-size-lg: 18px;
            --font-size-xl: 24px;
            --font-size-2xl: 32px;
            --font-size-3xl: 48px;
            --font-size-4xl: 64px;
            /* Shadows */
            
            --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
            --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.6);
            /* Border Radius */
            
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --radius-xl: 16px;
            --radius-2xl: 24px;
            /* Transitions */
            
            --transition-fast: 0.2s ease;
            --transition-normal: 0.3s ease;
            --transition-slow: 0.5s ease;
        }
        /* Reset & Base Styles */
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        html {
            scroll-behavior: smooth;
        }
        
        body {
            font-family: var(--font-family);
            font-size: var(--font-size-base);
            line-height: 1.6;
            color: var(--text-primary);
            background-color: var(--bg-primary);
            overflow-x: hidden;
        }
        
        img {
            max-width: 100%;
            height: auto;
        }
        
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition-fast);
        }
        
        ul {
            list-style: none;
        }
        /* Container */
        
        .container {
            max-width: var(--container-max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        /* Typography */
        
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 16px;
        }
        
        h1 {
            font-size: var(--font-size-3xl);
        }
        
        h2 {
            font-size: var(--font-size-2xl);
        }
        
        h3 {
            font-size: var(--font-size-xl);
        }
        
        h4 {
            font-size: var(--font-size-lg);
        }
        
        p {
            margin-bottom: 16px;
            color: var(--text-secondary);
        }
        
        .gradient-text {
            background: var(--gradient-primary);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        
        .section-title {
            font-size: var(--font-size-2xl);
            text-align: center;
            margin-bottom: 20px;
            color: var(--text-primary);
        }
        
        .section-subtitle {
            font-size: var(--font-size-lg);
            text-align: center;
            color: var(--text-secondary);
            margin-bottom: 50px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        /* Buttons */
        
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-lg);
            font-weight: 600;
            font-size: var(--font-size-base);
            border: 2px solid transparent;
            cursor: pointer;
            transition: var(--transition-normal);
            text-decoration: none;
            white-space: nowrap;
        }
        
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-lg);
        }
        
        .btn-secondary {
            background: var(--bg-tertiary);
            color: var(--text-primary);
            border-color: var(--border-secondary);
        }
        
        .btn-secondary:hover {
            background: var(--bg-card);
            border-color: var(--primary-color);
        }
        
        .btn-outline {
            background: transparent;
            color: var(--text-primary);
            border-color: var(--border-primary);
        }
        
        .btn-outline:hover {
            background: var(--primary-color);
            border-color: var(--primary-color);
            color: white;
        }
        
        .btn-sm {
            padding: 8px 16px;
            font-size: var(--font-size-sm);
        }
        
        .btn-large {
            padding: 16px 32px;
            font-size: var(--font-size-lg);
        }
        /* Header */
        
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10, 10, 10, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-primary);
        }
        
        .navbar {
            padding: 16px 0;
        }
        
        .navbar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        
        .nav-brand {
            display: flex;
            align-items: center;
        }
        
        .brand-link {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: var(--font-size-xl);
            font-weight: 800;
            color: var(--text-primary);
            /* THÊM 3 DÒNG NÀY */
            
            position: relative;
            /* Tạo mốc tọa độ cho logo bên trong */
            
            width: 40px;
            /* Giữ lại khoảng trống bằng kích thước logo cũ để chữ không bị xô lệch */
            
            height: 40px;
            /* Giữ chiều cao gốc */
        }
        
        .brand-logo {
            height: 60px;
            /* chỉnh tùy bạn */
            
            animation: logoFloat 4s ease-in-out infinite;
            transform-origin: center;
        }
        
        @keyframes logoFloat {
            0% {
                transform: rotate(0deg);
            }
            25% {
                transform: rotate(3deg);
            }
            50% {
                transform: rotate(0deg);
            }
            75% {
                transform: rotate(-3deg);
            }
            100% {
                transform: rotate(0deg);
            }
        }
        
        .nav-menu {
            display: flex;
            align-items: center;
        }
        
        .nav-list {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        
        .nav-link {
            color: var(--text-secondary);
            font-weight: 500;
            transition: var(--transition-fast);
        }
        
        .nav-link:hover {
            color: var(--primary-color);
        }
        
        .nav-link.active {
            /* Nền xám đậm */
            
            border-bottom: 2px solid #8d2cfc;
            font-weight: 600;
            border-radius: 6px 6px 0 0;
            /* Bo góc trên */
        }
        
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        
        .nav-toggle {
            display: none;
            flex-direction: column;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
        }
        
        .hamburger {
            width: 24px;
            height: 2px;
            background: var(--text-primary);
            transition: var(--transition-fast);
            position: relative;
        }
        
        .hamburger::before,
        .hamburger::after {
            content: '';
            position: absolute;
            width: 24px;
            height: 2px;
            background: var(--text-primary);
            transition: var(--transition-fast);
        }
        
        .hamburger::before {
            top: -8px;
        }
        
        .hamburger::after {
            top: 8px;
        }
        /* Footer */
        
        .footer {
            background: var(--bg-primary);
            border-top: 1px solid var(--border-primary);
            padding: 60px 0 20px;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        
        .footer-brand h3 {
            font-size: var(--font-size-xl);
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        
        .footer-brand p {
            color: var(--text-secondary);
            margin-bottom: 20px;
        }
        
        .footer-logo {
            width: 50px;
            height: 50px;
            margin-bottom: 16px;
        }
        
        .footer-stats {
            display: flex;
            gap: 30px;
        }
        
        .footer-section h4 {
            font-size: var(--font-size-lg);
            margin-bottom: 20px;
            color: var(--text-primary);
        }
        
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        
        .footer-links a {
            color: var(--text-secondary);
            transition: var(--transition-fast);
        }
        
        .footer-links a:hover {
            color: var(--primary-color);
        }
        
        .contact-info {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        
        .contact-item {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        
        .contact-item i {
            color: var(--primary-color);
            width: 20px;
        }
        
        .contact-item a {
            color: var(--text-secondary);
            transition: var(--transition-fast);
        }
        
        .contact-item a:hover {
            color: var(--primary-color);
        }
        
        .footer-bottom {
            border-top: 1px solid var(--border-primary);
            padding-top: 20px;
        }
        
        .footer-bottom-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }
        
        .footer-bottom p {
            color: var(--text-muted);
            margin: 0;
        }
        
        .footer-bottom .footer-links {
            flex-direction: row;
            gap: 20px;
        }
        /* Grid Systems */
        
        .grid {
            display: grid;
            gap: 30px;
        }
        
        .grid-2 {
            grid-template-columns: repeat(2, 1fr);
        }
        
        .grid-3 {
            grid-template-columns: repeat(3, 1fr);
        }
        
        .grid-4 {
            grid-template-columns: repeat(4, 1fr);
        }
        
        .grid-auto {
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        }
        /* Cards */
        
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-xl);
            border: 1px solid var(--border-primary);
            padding: var(--card-padding);
            transition: var(--transition-normal);
        }
        
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        /* Sections */
        
        .section {
            padding: var(--section-padding);
        }
        
        .section-primary {
            background: var(--bg-primary)!important;
        }
        
        .section-secondary {
            background: var(--bg-secondary);
        }
        /* Animations */
        
        .fade-in-up {
            opacity: 0;
            transform: translateY(30px);
            transition: all 0.6s ease;
        }
        
        .fade-in-up.visible {
            opacity: 1;
            transform: translateY(0);
        }
        
        .fade-in-left {
            opacity: 0;
            transform: translateX(-30px);
            transition: all 0.6s ease;
        }
        
        .fade-in-left.visible {
            opacity: 1;
            transform: translateX(0);
        }
        
        .fade-in-right {
            opacity: 0;
            transform: translateX(30px);
            transition: all 0.6s ease;
        }
        
        .fade-in-right.visible {
            opacity: 1;
            transform: translateX(0);
        }
        /* Utility Classes */
        
        .text-center {
            text-align: center;
        }
        
        .text-left {
            text-align: left;
        }
        
        .text-right {
            text-align: right;
        }
        
        .mb-0 {
            margin-bottom: 0;
        }
        
        .mb-1 {
            margin-bottom: 8px;
        }
        
        .mb-2 {
            margin-bottom: 16px;
        }
        
        .mb-3 {
            margin-bottom: 24px;
        }
        
        .mb-4 {
            margin-bottom: 32px;
        }
        
        .mb-5 {
            margin-bottom: 40px;
        }
        
        .mt-0 {
            margin-top: 0;
        }
        
        .mt-1 {
            margin-top: 8px;
        }
        
        .mt-2 {
            margin-top: 16px;
        }
        
        .mt-3 {
            margin-top: 24px;
        }
        
        .mt-4 {
            margin-top: 32px;
        }
        
        .mt-5 {
            margin-top: 40px;
        }
        
        .hidden {
            display: none;
        }
        
        .visible {
            display: block;
        }
        /* Responsive */
        
        @media (max-width: 768px) {
            :root {
                --font-size-3xl: 36px;
                --font-size-2xl: 28px;
                --font-size-xl: 20px;
                --section-padding: 60px 0;
                --card-padding: 20px;
            }
            .container {
                padding: 0 16px;
            }
            .nav-menu {
                position: fixed;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--bg-secondary);
                border-top: 1px solid var(--border-primary);
                padding: 20px;
                transform: translateY(-100%);
                transition: var(--transition-normal);
                opacity: 0;
                visibility: hidden;
            }
            .nav-menu.active {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            .nav-list {
                flex-direction: column;
                gap: 20px;
            }
            .nav-actions {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: 1fr;
            }
            .footer-content {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .footer-stats {
                justify-content: center;
            }
            .footer-bottom-content {
                flex-direction: column;
                text-align: center;
            }
        }
        
        .stat-item {
            text-align: center;
        }
        
        .stat-number {
            display: block;
            font-size: var(--font-size-xl);
            font-weight: 800;
            color: var(--primary-color);
        }
        
        .stat-label {
            font-size: var(--font-size-sm);
            color: var(--text-muted);
        }
        /* Utility classes for margin and padding */
        /* Margin classes */
        
        [class*="m-"] {
            margin: 0 !important;
        }
        
        .m-0 {
            margin: 0 !important;
        }
        
        .m-1 {
            margin: 0.25rem !important;
        }
        
        .m-2 {
            margin: 0.5rem !important;
        }
        
        .m-3 {
            margin: 1rem !important;
        }
        
        .m-4 {
            margin: 1.5rem !important;
        }
        
        .m-5 {
            margin: 3rem !important;
        }
        /* Margin top */
        
        .mt-0 {
            margin-top: 0 !important;
        }
        
        .mt-1 {
            margin-top: 0.25rem !important;
        }
        
        .mt-2 {
            margin-top: 0.5rem !important;
        }
        
        .mt-3 {
            margin-top: 1rem !important;
        }
        
        .mt-4 {
            margin-top: 1.5rem !important;
        }
        
        .mt-5 {
            margin-top: 3rem !important;
        }
        /* Margin bottom */
        
        .mb-0 {
            margin-bottom: 0 !important;
        }
        
        .mb-1 {
            margin-bottom: 0.25rem !important;
        }
        
        .mb-2 {
            margin-bottom: 0.5rem !important;
        }
        
        .mb-3 {
            margin-bottom: 1rem !important;
        }
        
        .mb-4 {
            margin-bottom: 1.5rem !important;
        }
        
        .mb-5 {
            margin-bottom: 3rem !important;
        }
        /* Margin left */
        
        .ml-0 {
            margin-left: 0 !important;
        }
        
        .ml-1 {
            margin-left: 0.25rem !important;
        }
        
        .ml-2 {
            margin-left: 0.5rem !important;
        }
        
        .ml-3 {
            margin-left: 1rem !important;
        }
        
        .ml-4 {
            margin-left: 1.5rem !important;
        }
        
        .ml-5 {
            margin-left: 3rem !important;
        }
        /* Margin right */
        
        .mr-0 {
            margin-right: 0 !important;
        }
        
        .mr-1 {
            margin-right: 0.25rem !important;
        }
        
        .mr-2 {
            margin-right: 0.5rem !important;
        }
        
        .mr-3 {
            margin-right: 1rem !important;
        }
        
        .mr-4 {
            margin-right: 1.5rem !important;
        }
        
        .mr-5 {
            margin-right: 3rem !important;
        }
        /* Padding classes */
        
        [class*="p-"] {
            padding: 0 !important;
        }
        
        .p-0 {
            padding: 0 !important;
        }
        
        .p-1 {
            padding: 0.25rem !important;
        }
        
        .p-2 {
            padding: 0.5rem !important;
        }
        
        .p-3 {
            padding: 1rem !important;
        }
        
        .p-4 {
            padding: 1.5rem !important;
        }
        
        .p-5 {
            padding: 3rem !important;
        }
        /* Padding top */
        
        .pt-0 {
            padding-top: 0 !important;
        }
        
        .pt-1 {
            padding-top: 0.25rem !important;
        }
        
        .pt-2 {
            padding-top: 0.5rem !important;
        }
        
        .pt-3 {
            padding-top: 1rem !important;
        }
        
        .pt-4 {
            padding-top: 1.5rem !important;
        }
        
        .pt-5 {
            padding-top: 3rem !important;
        }
        /* Padding bottom */
        
        .pb-0 {
            padding-bottom: 0 !important;
        }
        
        .pb-1 {
            padding-bottom: 0.25rem !important;
        }
        
        .pb-2 {
            padding-bottom: 0.5rem !important;
        }
        
        .pb-3 {
            padding-bottom: 1rem !important;
        }
        
        .pb-4 {
            padding-bottom: 1.5rem !important;
        }
        
        .pb-5 {
            padding-bottom: 3rem !important;
        }
        /* Padding left */
        
        .pl-0 {
            padding-left: 0 !important;
        }
        
        .pl-1 {
            padding-left: 0.25rem !important;
        }
        
        .pl-2 {
            padding-left: 0.5rem !important;
        }
        
        .pl-3 {
            padding-left: 1rem !important;
        }
        
        .pl-4 {
            padding-left: 1.5rem !important;
        }
        
        .pl-5 {
            padding-left: 3rem !important;
        }
        /* Padding right */
        
        .pr-0 {
            padding-right: 0 !important;
        }
        
        .pr-1 {
            padding-right: 0.25rem !important;
        }
        
        .pr-2 {
            padding-right: 0.5rem !important;
        }
        
        .pr-3 {
            padding-right: 1rem !important;
        }
        
        .pr-4 {
            padding-right: 1.5rem !important;
        }
        
        .pr-5 {
            padding-right: 3rem !important;
        }
        /* X-axis (left and right) */
        
        .mx-0 {
            margin-left: 0 !important;
            margin-right: 0 !important;
        }
        
        .mx-1 {
            margin-left: 0.25rem !important;
            margin-right: 0.25rem !important;
        }
        
        .mx-2 {
            margin-left: 0.5rem !important;
            margin-right: 0.5rem !important;
        }
        
        .mx-3 {
            margin-left: 1rem !important;
            margin-right: 1rem !important;
        }
        
        .mx-4 {
            margin-left: 1.5rem !important;
            margin-right: 1.5rem !important;
        }
        
        .mx-5 {
            margin-left: 3rem !important;
            margin-right: 3rem !important;
        }
        /* Y-axis (top and bottom) */
        
        .my-0 {
            margin-top: 0 !important;
            margin-bottom: 0 !important;
        }
        
        .my-1 {
            margin-top: 0.25rem !important;
            margin-bottom: 0.25rem !important;
        }
        
        .my-2 {
            margin-top: 0.5rem !important;
            margin-bottom: 0.5rem !important;
        }
        
        .my-3 {
            margin-top: 1rem !important;
            margin-bottom: 1rem !important;
        }
        
        .my-4 {
            margin-top: 1.5rem !important;
            margin-bottom: 1.5rem !important;
        }
        
        .my-5 {
            margin-top: 3rem !important;
            margin-bottom: 3rem !important;
        }
        /* Padding X-axis (left and right) */
        
        .px-0 {
            padding-left: 0 !important;
            padding-right: 0 !important;
        }
        
        .px-1 {
            padding-left: 0.25rem !important;
            padding-right: 0.25rem !important;
        }
        
        .px-2 {
            padding-left: 0.5rem !important;
            padding-right: 0.5rem !important;
        }
        
        .px-3 {
            padding-left: 1rem !important;
            padding-right: 1rem !important;
        }
        
        .px-4 {
            padding-left: 1.5rem !important;
            padding-right: 1.5rem !important;
        }
        
        .px-5 {
            padding-left: 3rem !important;
            padding-right: 3rem !important;
        }
        /* Padding Y-axis (top and bottom) */
        
        .py-0 {
            padding-top: 0 !important;
            padding-bottom: 0 !important;
        }
        
        .py-1 {
            padding-top: 0.25rem !important;
            padding-bottom: 0.25rem !important;
        }
        
        .py-2 {
            padding-top: 0.5rem !important;
            padding-bottom: 0.5rem !important;
        }
        
        .py-3 {
            padding-top: 1rem !important;
            padding-bottom: 1rem !important;
        }
        
        .py-4 {
            padding-top: 1.5rem !important;
            padding-bottom: 1.5rem !important;
        }
        
        .py-5 {
            padding-top: 3rem !important;
            padding-bottom: 3rem !important;
        }
        /* Display Flex Utilities */
        
        .d-flex {
            display: flex !important;
        }
        
        .d-inline-flex {
            display: inline-flex !important;
        }
        
        .d-block {
            display: block !important;
        }
        
        .d-inline {
            display: inline !important;
        }
        
        .d-none {
            display: none !important;
        }
        /* Flex Direction */
        
        .flex-row {
            flex-direction: row !important;
        }
        
        .flex-row-reverse {
            flex-direction: row-reverse !important;
        }
        
        .flex-column {
            flex-direction: column !important;
        }
        
        .flex-column-reverse {
            flex-direction: column-reverse !important;
        }
        /* Flex Wrap */
        
        .flex-wrap {
            flex-wrap: wrap !important;
        }
        
        .flex-nowrap {
            flex-wrap: nowrap !important;
        }
        
        .flex-wrap-reverse {
            flex-wrap: wrap-reverse !important;
        }
        /* Justify Content */
        
        .justify-start {
            justify-content: flex-start !important;
        }
        
        .justify-end {
            justify-content: flex-end !important;
        }
        
        .justify-center {
            justify-content: center !important;
        }
        
        .justify-between {
            justify-content: space-between !important;
        }
        
        .justify-around {
            justify-content: space-around !important;
        }
        
        .justify-evenly {
            justify-content: space-evenly !important;
        }
        /* Align Items */
        
        .align-items-start {
            align-items: flex-start !important;
        }
        
        .align-items-end {
            align-items: flex-end !important;
        }
        
        .align-items-center {
            align-items: center !important;
        }
        
        .align-items-baseline {
            align-items: baseline !important;
        }
        
        .align-items-stretch {
            align-items: stretch !important;
        }
        /* Align Self */
        
        .align-self-start {
            align-self: flex-start !important;
        }
        
        .align-self-end {
            align-self: flex-end !important;
        }
        
        .align-self-center {
            align-self: center !important;
        }
        
        .align-self-baseline {
            align-self: baseline !important;
        }
        
        .align-self-stretch {
            align-self: stretch !important;
        }
        /* Align Content */
        
        .align-content-start {
            align-content: flex-start !important;
        }
        
        .align-content-end {
            align-content: flex-end !important;
        }
        
        .align-content-center {
            align-content: center !important;
        }
        
        .align-content-between {
            align-content: space-between !important;
        }
        
        .align-content-around {
            align-content: space-around !important;
        }
        
        .align-content-stretch {
            align-content: stretch !important;
        }
        /* Flex Grow */
        
        .flex-grow-0 {
            flex-grow: 0 !important;
        }
        
        .flex-grow-1 {
            flex-grow: 1 !important;
        }
        /* Flex Shrink */
        
        .flex-shrink-0 {
            flex-shrink: 0 !important;
        }
        
        .flex-shrink-1 {
            flex-shrink: 1 !important;
        }
        /* Order */
        
        .order-0 {
            order: 0 !important;
        }
        
        .order-1 {
            order: 1 !important;
        }
        
        .order-2 {
            order: 2 !important;
        }
        
        .order-3 {
            order: 3 !important;
        }
        
        .order-4 {
            order: 4 !important;
        }
        
        .order-5 {
            order: 5 !important;
        }
        
        .order-first {
            order: -1 !important;
        }
        
        .order-last {
            order: 999 !important;
        }
        
        .hidden {
            display: none!important;
        }
        /* public/css/products.css - Styling cho trang sản phẩm */
        /* Products Hero Section */
        
        .products-hero {
            padding: 140px 0 80px;
            background: var(--bg-primary);
            position: relative;
            overflow: hidden;
        }
        
        .products-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(circle at 20% 30%, rgba(0, 212, 255, 0.15) 0%, transparent 50%), radial-gradient(circle at 80% 70%, rgba(124, 58, 237, 0.15) 0%, transparent 50%), linear-gradient(135deg, rgba(0, 212, 255, 0.05) 0%, rgba(124, 58, 237, 0.05) 100%);
        }
        
        .hero-content {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 800px;
            margin: 0 auto;
        }
        
        .breadcrumb {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            margin-bottom: 24px;
            font-size: var(--font-size-sm);
            color: var(--text-muted);
        }
        
        .breadcrumb a {
            color: var(--primary-color);
            transition: var(--transition-fast);
        }
        
        .breadcrumb a:hover {
            color: var(--primary-light);
        }
        
        .breadcrumb i {
            font-size: 10px;
        }
        
        .hero-title {
            font-size: var(--font-size-3xl);
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 24px;
            color: var(--text-primary);
        }
        
        .hero-subtitle {
            font-size: var(--font-size-lg);
            color: var(--text-secondary);
            margin-bottom: 40px;
            line-height: 1.6;
        }
        
        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 60px;
            flex-wrap: wrap;
        }
        
        .stat-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
        }
        
        .stat-number {
            font-size: var(--font-size-2xl);
            font-weight: 800;
            color: var(--primary-color);
            line-height: 1;
        }
        
        .stat-label {
            font-size: var(--font-size-sm);
            color: var(--text-secondary);
            font-weight: 500;
        }
        /* Product Filter */
        
        .product-filter {
            padding: 40px 0;
            background: var(--bg-secondary);
            border-bottom: 1px solid var(--border-primary);
        }
        
        .filter-wrapper {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 20px;
        }
        
        .filter-tabs {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        
        .filter-tab {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 12px 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-primary);
            border-radius: var(--radius-lg);
            color: var(--text-secondary);
            font-size: var(--font-size-sm);
            font-weight: 500;
            cursor: pointer;
            transition: var(--transition-normal);
        }
        
        .filter-tab:hover {
            border-color: var(--primary-color);
            color: var(--primary-color);
            background: rgba(0, 212, 255, 0.05);
        }
        
        .filter-tab.active {
            background: var(--gradient-primary);
            border-color: var(--primary-color);
            color: white;
        }
        
        .filter-sort {
            position: relative;
        }
        
        .sort-select {
            padding: 12px 40px 12px 16px;
            background: var(--bg-card);
            border: 1px solid var(--border-primary);
            border-radius: var(--radius-lg);
            color: var(--text-primary);
            font-size: var(--font-size-sm);
            cursor: pointer;
            appearance: none;
            min-width: 200px;
        }
        
        .sort-select::after {
            content: '\f107';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            right: 16px;
            top: 50%;
            transform: translateY(-50%);
            pointer-events: none;
            color: var(--text-muted);
        }
        /* Featured Product */
        
        .featured-product {
            padding: var(--section-padding);
        }
        
        .featured-wrapper {
            position: relative;
            background: var(--bg-card);
            border-radius: var(--radius-2xl);
            border: 2px solid var(--primary-color);
            padding: 60px;
            overflow: hidden;
        }
        
        .featured-wrapper::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.03) 0%, rgba(124, 58, 237, 0.03) 100%);
            z-index: 0;
        }
        
        .featured-badge {
            position: absolute;
            top: -20px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--gradient-primary);
            color: white;
            padding: 12px 30px;
            border-radius: var(--radius-lg);
            font-size: var(--font-size-sm);
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 8px;
            z-index: 10;
            box-shadow: var(--shadow-lg);
        }
        
        .featured-content {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 80px;
            align-items: center;
        }
        
        .product-category {
            display: flex;
            gap: 8px;
            margin-bottom: 20px;
        }
        
        .category-tag {
            padding: 4px 12px;
            border-radius: var(--radius-lg);
            font-size: var(--font-size-xs);
            font-weight: 600;
            text-transform: uppercase;
        }
        
        .category-tag.flagship {
            background: linear-gradient(135deg, #ffd700, #ffed4e);
            color: #92400e;
        }
        
  
        .featured-title {
            font-size: var(--font-size-2xl);
            font-weight: 800;
            margin-bottom: 20px;
            color: var(--text-primary);
        }
        
        .featured-description {
            font-size: var(--font-size-lg);
            color: var(--text-secondary);
            margin-bottom: 30px;
            line-height: 1.6;
        }
        
        .featured-highlights {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin-bottom: 40px;
        }
        
        .highlight-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 16px;
            background: rgba(0, 212, 255, 0.05);
            border-radius: var(--radius-lg);
            border: 1px solid rgba(0, 212, 255, 0.1);
            transition: var(--transition-normal);
        }
        
        .highlight-item:hover {
            background: rgba(0, 212, 255, 0.1);
            border-color: rgba(0, 212, 255, 0.3);
        }
        
        .highlight-item i {
            color: var(--primary-color);
            font-size: var(--font-size-lg);
        }
        
        .highlight-item span {
            font-size: var(--font-size-sm);
            color: var(--text-primary);
            font-weight: 500;
        }
        
        .featured-pricing {
            margin-bottom: 40px;
        }
        
        .price-plans {
            display: flex;
            gap: 12px;
        }
        
        .plan-option {
            flex: 1;
            padding: 16px;
            background: var(--bg-secondary);
            border: 1px solid var(--border-primary);
            border-radius: var(--radius-lg);
            text-align: center;
            position: relative;
            transition: var(--transition-normal);
        }
        
        .plan-option:hover {
            border-color: var(--primary-color);
            background: rgba(0, 212, 255, 0.02);
        }
        
        .plan-option.popular {
            border-color: var(--primary-color);
            background: rgba(0, 212, 255, 0.05);
        }
        
        .plan-option.popular::before {
            content: '';
            position: absolute;
            top: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 3px;
            background: var(--gradient-primary);
            border-radius: var(--radius-lg);
        }
        
        .plan-name {
            display: block;
            font-size: var(--font-size-sm);
            color: var(--text-secondary);
            margin-bottom: 4px;
        }
        
        .plan-price {
            display: block;
            font-size: var(--font-size-lg);
            font-weight: 700;
            color: var(--primary-color);
        }
        
        .plan-badge {
            position: absolute;
            top: -8px;
            right: 8px;
            background: var(--gradient-primary);
            color: white;
            padding: 2px 8px;
            border-radius: var(--radius-sm);
            font-size: 10px;
            font-weight: 600;
        }
        
        .featured-actions {
            display: flex;
            gap: 16px;
        }
        /* Featured Visual */
        
        .featured-visual {
            position: relative;
        }
        
        .product-showcase {
            position: relative;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        
        .showcase-image {
            position: relative;
            z-index: 2;
        }
        
        .mockup-container {
            width: 400px;
            height: 300px;
            background: linear-gradient(135deg, #1e1e1e, #2d2d2d);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-xl);
            overflow: hidden;
            border: 1px solid #3d3d3d;
        }
        
        .mockup-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 16px !important;
            background: #2d2d2d;
            border-bottom: 1px solid #3d3d3d;
        }
        
        .mockup-controls {
            display: flex;
            gap: 6px;
        }
        
        .control-dot {
            width: 12px;
            height: 12px;
            border-radius: 50%;
        }
        
        .control-dot.red {
            background: #ff5f57;
        }
        
        .control-dot.yellow {
            background: #ffbd2e;
        }
        
        .control-dot.green {
            background: #28ca42;
        }
        
        .mockup-title {
            color: #ffffff;
            font-size: var(--font-size-sm);
            font-weight: 600;
        }
        
        .mockup-content {
            padding: 20px;
            font-family: 'Monaco', 'Menlo', monospace;
        }
        
        .code-line {
            display: flex;
            gap: 16px;
            margin-bottom: 12px;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: var(--transition-fast);
        }
        
        .code-line.active {
            background: rgba(0, 212, 255, 0.1);
            border-left: 3px solid var(--primary-color);
            padding-left: 13px;
        }
        
        .line-number {
            color: #666;
            font-size: var(--font-size-xs);
            min-width: 20px;
        }
        
        .code-text {
            color: #00d4ff;
            font-size: var(--font-size-xs);
        }
        
        .floating-features {
            position: absolute;
            top: 95px;
            left: 0;
            right: 0;
            bottom: 0;
            z-index: 9999999;
        }
        
        .feature-bubble {
            position: absolute;
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 12px;
            background: var(--bg-card);
            border: 1px solid var(--border-primary);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            animation: float 3s ease-in-out infinite;
        }
        
        .feature-bubble:nth-child(1) {
            animation-delay: 0s;
        }
        
        .feature-bubble:nth-child(2) {
            animation-delay: 1s;
        }
        
        .feature-bubble:nth-child(3) {
            animation-delay: 2s;
        }
        
        @keyframes float {
            0%, 100% {
                transform: translateY(0px);
            }
            50% {
                transform: translateY(-10px);
            }
        }
        
        .feature-bubble i {
            color: var(--primary-color);
            font-size: var(--font-size-sm);
        }
        
        .feature-bubble span {
            font-size: var(--font-size-xs);
            color: var(--text-primary);
            font-weight: 500;
            white-space: nowrap;
        }
        /* Products Grid */
        
        .products-grid {
            padding: var(--section-padding);
        }
        
        .section-header {
            text-align: center;
            margin-bottom: 60px;
        }
        
        .products-wrapper {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
            gap: 30px;
            margin-bottom: 60px;
        }
        
        .product-card {
            background: var(--bg-card);
            border-radius: var(--radius-xl);
            border: 1px solid var(--border-primary);
            overflow: hidden;
            transition: var(--transition-normal);
            position: relative;
            display: flex;
            flex-direction: column;
        }
        
        .product-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.05), transparent);
            transition: var(--transition-slow);
            z-index: 1;
        }
        
        .product-card:hover::before {
            left: 100%;
        }
        
        .product-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-xl);
            border-color: var(--primary-color);
        }
        
        .product-card.trending {
            border-color: #ff6b35;
        }
        
        .product-card.hot {
            border-color: #ef4444;
        }
        
        .product-card.exclusive {
            border-color: #7c3aed;
        }
        
        .product-card.coming-soon {
            border-color: #6b7280;
            opacity: 0.8;
        }
        
        .product-header {
            position: relative;
            padding: 30px 30px 20px;
            z-index: 2;
        }
        
        .product-image {
            position: relative;
            display: flex;
            justify-content: center;
            margin-bottom: 20px;
        }
        
        .product-icon {
            width: 80px;
            height: 80px;
            border-radius: var(--radius-xl);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: var(--font-size-2xl);
            color: white;
            box-shadow: var(--shadow-lg);
        }
        
        .product-icon.kylan {
            background: linear-gradient(135deg, #ff6b35, #ff8a65);
        }
        
        .product-icon.okvip {
            background: linear-gradient(135deg, #00d4ff, #0ea5e9);
        }
        
        .product-icon.seo {
            background: linear-gradient(135deg, #22c55e, #16a34a);
        }
        
        .product-icon.myaloha {
            background: linear-gradient(135deg, #8b5cf6, #7c3aed);
        }
        
        .product-icon.browser {
            background: linear-gradient(135deg, #3b82f6, #1d4ed8);
        }
        
        .product-icon.coming {
            background: linear-gradient(135deg, #6b7280, #4b5563);
        }
        
.product-badges {
    position: absolute;
    top: 14px;
    right: 15px;
    z-index: 3;
}
        
        .badge {
            display: flex;
            align-items: center;
            gap: 4px;
            padding: 6px 12px;
            border-radius: var(--radius-lg);
            font-size: var(--font-size-xs);
            font-weight: 700;
            text-transform: uppercase;
        }
        
        .badge.trending {
            background: linear-gradient(135deg, #ff6b35, #ff8a65);
            color: white;
            animation: badge-glow 2s infinite;
        }
        
        .badge.hot {
            background: linear-gradient(135deg, #ef4444, #dc2626);
            color: white;
            animation: badge-pulse 1.5s infinite;
        }
        
        .badge.new {
            background: linear-gradient(135deg, #22c55e, #4ade80);
            color: white;
        }
        
        .badge.exclusive {
            background: linear-gradient(135deg, #7c3aed, #a855f7);
            color: white;
        }
        
        @keyframes badge-glow {
            0%, 100% {
                box-shadow: 0 0 10px rgba(255, 107, 53, 0.5);
            }
            50% {
                box-shadow: 0 0 20px rgba(255, 107, 53, 0.8);
            }
        }
        
        @keyframes badge-pulse {
            0%, 100% {
                transform: scale(1);
            }
            50% {
                transform: scale(1.1);
            }
        }
        
        .product-content {
            padding: 0 30px 0px;
            flex: 1;
            position: relative;
            z-index: 2;
        }
        
        .category-tag.education {
            background: linear-gradient(135deg, #8b5cf6, #7c3aed);
            color: white;
        }
        
        .category-tag.seo {
            background: linear-gradient(135deg, #22c55e, #16a34a);
            color: white;
        }
        
        .category-tag.browser {
            background: linear-gradient(135deg, #3b82f6, #1d4ed8);
            color: white;
        }
        
        .product-title {
            font-size: var(--font-size-lg);
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
            line-height: 1.3;
        }
        
        .product-description {
            color: var(--text-secondary);
            margin-bottom: 20px;
            line-height: 1.5;
            font-size: var(--font-size-sm);
        }
        
        .product-features {
            display: flex;
            gap: 16px;
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        
        .feature-item {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: var(--font-size-xs);
            color: var(--text-muted);
        }
        
        .feature-item i {
            color: var(--primary-color);
        }
        
        .product-stats {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 20px;
        }
        
        .stat {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .stat-value {
            font-weight: 700;
            color: var(--text-primary);
        }
        
        .rating {
            display: flex;
            gap: 2px;
        }
        
        .rating i {
            color: #fbbf24;
            font-size: var(--font-size-xs);
        }
        
        .reviews {
            font-size: var(--font-size-xs);
            color: var(--text-muted);
        }
        
        .product-footer {
            padding: 20px 30px 30px;
            border-top: 1px solid var(--border-primary);
            position: relative;
            z-index: 2;
        }
        
        .product-pricing {
            display: flex;
            align-items: baseline;
            gap: 8px;
            margin-bottom: 16px;
        }
        
        .current-price {
            font-size: var(--font-size-xl);
            font-weight: 800;
            color: var(--primary-color);
        }
        
        .original-price {
            font-size: var(--font-size-sm);
            color: var(--text-muted);
            text-decoration: line-through;
        }
        
        .price-period {
            font-size: var(--font-size-xs);
            color: var(--text-muted);
        }
        
        .product-actions {
            display: flex;
            gap: 8px;
        }
        
        .btn-sm {
            padding: 8px 16px;
            font-size: var(--font-size-sm);
            flex: 1;
        }
        /* Load More */
        
        .load-more-section {
            text-align: center;
            padding: 40px 0;
        }
        
        .load-more-btn {
            margin-bottom: 16px;
        }
        
        .load-more-note {
            color: var(--text-muted);
            font-size: var(--font-size-sm);
        }
        /* Newsletter */
        
        .newsletter {
            padding: var(--section-padding);
        }
        
        .newsletter-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
            max-width: 1000px;
            margin: 0 auto;
        }
        
        .newsletter-info h2 {
            font-size: var(--font-size-2xl);
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        
        .newsletter-info p {
            color: var(--text-secondary);
            line-height: 1.6;
        }
        
        .email-form {
            background: var(--bg-card);
            padding: 30px;
            border-radius: var(--radius-xl);
            border: 1px solid var(--border-primary);
        }
        
        .form-group {
            display: flex;
            gap: 12px;
            margin-bottom: 16px;
        }
        
        .form-input {
            flex: 1;
            padding: 12px 16px;
            border: 1px solid var(--border-primary);
            border-radius: var(--radius-lg);
            background: var(--bg-secondary);
            color: var(--text-primary);
            font-size: var(--font-size-sm);
        }
        
        .form-input:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
        }
        
        .form-note {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: var(--font-size-xs);
            color: var(--text-muted);
            margin: 0;
        }
        
        .form-note i {
            color: var(--primary-color);
        }
        /* Responsive Design */
        
        @media (max-width: 768px) {
            .products-hero {
                padding: 120px 0 60px;
            }
            .hero-title {
                font-size: var(--font-size-2xl);
            }
            .hero-subtitle {
                font-size: var(--font-size-base);
            }
            .hero-stats {
                gap: 40px;
            }
            .filter-wrapper {
                flex-direction: column;
                gap: 16px;
                align-items: stretch;
            }
            .filter-tabs {
                overflow-x: auto;
                padding-bottom: 8px;
                scrollbar-width: none;
            }
            .filter-tabs::-webkit-scrollbar {
                display: none;
            }
            .sort-select {
                width: 100%;
            }
            .featured-wrapper {
                padding: 40px 20px;
            }
            .featured-content {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .featured-highlights {
                grid-template-columns: 1fr;
            }
            .price-plans {
                flex-direction: column;
                gap: 8px;
            }
            .featured-actions {
                flex-direction: column;
            }
            .products-wrapper {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .newsletter-content {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .form-group {
                flex-direction: column;
            }
            .mockup-container {
                width: 300px;
                height: 255px;
            }
            .floating-features {
                display: none;
            }
        }
        
        @media (max-width: 480px) {
            .featured-wrapper {
                padding: 30px 16px;
            }
            .product-card {
                margin: 0 -8px;
            }
            .product-header,
            .product-content,
            .product-footer {
                padding-left: 20px;
                padding-right: 20px;
            }
            .product-features {
                flex-direction: column;
                gap: 8px;
            }
            .product-actions {
                flex-direction: column;
            }
            .email-form {
                padding: 20px;
            }
            .stat-number {
                font-size: var(--font-size-xl);
            }
        }
        /* Animation */
        
        .product-card {
            opacity: 0;
            transform: translateY(30px);
            animation: fadeInUp 0.6s ease forwards;
        }
        
        .product-card:nth-child(1) {
            animation-delay: 0.1s;
        }
        
        .product-card:nth-child(2) {
            animation-delay: 0.2s;
        }
        
        .product-card:nth-child(3) {
            animation-delay: 0.3s;
        }
        
        .product-card:nth-child(4) {
            animation-delay: 0.4s;
        }
        
        .product-card:nth-child(5) {
            animation-delay: 0.5s;
        }
        
        .product-card:nth-child(6) {
            animation-delay: 0.6s;
        }
        
        .product-card:nth-child(7) {
            animation-delay: 0.7s;
        }
        
        @keyframes fadeInUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        /* Accessibility */
        
        @media (prefers-reduced-motion: reduce) {
            .badge.trending,
            .badge.hot,
            .feature-bubble {
                animation: none;
            }
        }
        /* Print styles */
        
        @media print {
            .products-hero::before,
            .newsletter {
                display: none;
            }
            .product-card {
                break-inside: avoid;
                page-break-inside: avoid;
            }
        }
        
        .tooltip {
            position: absolute;
            background: var(--bg-tertiary);
            color: var(--text-primary);
            padding: 8px 12px;
            border-radius: var(--radius-md);
            font-size: var(--font-size-sm);
            pointer-events: none;
            z-index: 9999;
            opacity: 0;
            transform: translateY(10px);
            transition: var(--transition-fast);
            border: 1px solid var(--border-primary);
            box-shadow: var(--shadow-md);
        }
        
        .tooltip.visible {
            opacity: 1;
            transform: translateY(0);
        }
        
        .tooltip::after {
            content: '';
            position: absolute;
            top: 100%;
            left: 50%;
            transform: translateX(-50%);
            border: 6px solid transparent;
            border-top-color: var(--bg-tertiary);
        }
        
        .ripple {
            position: absolute;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.3);
            transform: scale(0);
            animation: ripple-animation 0.6s linear;
            pointer-events: none;
        }
        
        @keyframes ripple-animation {
            to {
                transform: scale(4);
                opacity: 0;
            }
        }
        
        .notification {
            position: fixed;
            top: 20px;
            right: 20px;
            padding: 16px 20px;
            border-radius: var(--radius-lg);
            color: white;
            font-weight: 500;
            z-index: 10000;
            transform: translateX(100%);
            transition: var(--transition-normal);
            box-shadow: var(--shadow-lg);
        }
        
        .notification.visible {
            transform: translateX(0);
        }
        
        .notification-success {
            background: #22c55e;
        }
        
        .notification-error {
            background: #ef4444;
        }
        
        .notification-info {
            background: var(--primary-color);
        }
        
        .modal {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            z-index: 9999;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition-normal);
        }
        
        .modal.active {
            opacity: 1;
            visibility: visible;
        }
        
        .modal-overlay {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--bg-overlay);
            backdrop-filter: blur(4px);
        }
        
        .modal-content {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: var(--bg-card);
            border-radius: var(--radius-xl);
            padding: var(--card-padding);
            max-width: 90vw;
            max-height: 90vh;
            overflow-y: auto;
            border: 1px solid var(--border-primary);
            box-shadow: var(--shadow-xl);
        }
        
        .modal-close {
            position: absolute;
            top: 16px;
            right: 16px;
            background: none;
            border: none;
            font-size: var(--font-size-xl);
            color: var(--text-secondary);
            cursor: pointer;
            transition: var(--transition-fast);
        }
        
        .modal-close:hover {
            color: var(--text-primary);
        }
        
        .header.scrolled {
            background: rgba(10, 10, 10, 0.98);
            backdrop-filter: blur(20px);
            box-shadow: var(--shadow-sm);
        }
        
        body.nav-open {
            overflow: hidden;
        }
        
        body.modal-open {
            overflow: hidden;
        }
        
        img.loaded {
            opacity: 1;
            transition: opacity 0.3s ease;
        }
        
        img[data-src] {
            opacity: 0;
        }
        
        @media (prefers-reduced-motion: reduce) {
            * {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
        }
  .notification {
            position: fixed;
            top: 20px;
            right: 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-primary);
            border-radius: var(--radius-lg);
            padding: 16px 20px;
            box-shadow: var(--shadow-xl);
            z-index: 1000;
            transform: translateX(100%);
            transition: transform 0.3s ease;
            max-width: 400px;
        }
        
        .notification.show {
            transform: translateX(0);
        }
        
        .notification-content {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        
        .notification-success {
            border-left: 4px solid #22c55e;
        }
        
        .notification-success i {
            color: #22c55e;
        }
        
        .notification-error {
            border-left: 4px solid #ef4444;
        }
        
        .notification-error i {
            color: #ef4444;
        }
        
        .notification-info {
            border-left: 4px solid var(--primary-color);
        }
        
        .notification-info i {
            color: var(--primary-color);
        }
        
        .navbar {
            height: 80px;
            /* 🔒 cố định */
            
            background: #111;
            display: flex;
            align-items: center;
            position: relative;
        }
        
        .container {
            width: 99%;
            margin: auto;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-wrap: wrap;
        }
        /* ===== LOGO ===== */
        
        .nav-brand {
            position: relative;
            height: 80px;
            width: 180px;
        }
        
        .brand-logo {
            position: absolute;
            height: 118px;
            width: auto;
            bottom: 10px;
        }
        .brand-logo2 {
               position: relative;
    height: 188px;
    width: auto;
    bottom: 33px;
        }
        /* ===== MENU ===== */
        
        .nav-menu {
            flex: 1;
            display: flex;
            justify-content: center;
        }
        
        .nav-list {
            list-style: none;
            display: flex;
            gap: 30px;
        }
        
        .nav-link {
            text-decoration: none;
            color: white;
            font-weight: 500;
            transition: 0.3s;
        }
        
        .nav-link:hover {
            color: #00bfff;
        }
        /* ===== BUTTON ===== */
        
        .nav-actions {
            display: flex;
            align-items: center;
        }
        
        .btn-primary {
            background: linear-gradient( 233deg, #ff9f00 0%, #ed3a3a 100%);
            color: white;
            padding: 10px 18px;
            border-radius: 6px;
            text-decoration: none;
            font-size: 14px;
            transition: 0.3s;
        }
        /* ===== MOBILE ===== */
        
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 26px;
            color: white;
            cursor: pointer;
        }
        
        @media (max-width: 768px) {
            .nav-menu {
                position: absolute;
                top: 80px;
                left: 0;
                width: 100%;
                background: #111;
                display: none;
                flex-direction: column;
                padding: 20px 0;
            }
            .nav-menu.active {
                display: flex;
            }
            .nav-list {
                flex-direction: column;
                align-items: center;
                gap: 20px;
            }
            .nav-actions {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
        }
        .title0 {
                text-align: center;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: .5em;
    display: inline-block;
    color: white;
        }
          .btn-outline:hover {
            background: #000000;
            border-color: #d83b00;
            color: white;
        }
        .btn-large {
            padding: 16px 32px;
            font-size: var(--font-size-lg);
            box-shadow: 0 0 22px rgb(170 0 0);
        }
      .btn-large {
    padding: 16px 32px;
    box-shadow: 0 0 22px rgb(0 0 0);
    font-size: 14px;
    text-align: center;
    color: white;
}
.featured-wrapper {
       border-radius: var(--radius-2xl);

}
.featured-wrapper {
      box-shadow:0 0 8px rgb(255 255 255);

}
.featured-wrapper::before {
    background: linear-gradient(
49deg, rgb(0 0 0) 0%, rgb(94 0 255 / 27%) 100%);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, #030064 0%, #000000 100%);
}
        
        .popup-bot-container {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            z-index: 100000;
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }
        .popup-bot-container.active {
            opacity: 1;
            visibility: visible;
        }
        .popup-bot-overlay {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.6);
            backdrop-filter: blur(8px);
        }
        .popup-bot-box {
            position: relative;
            background: #1a1a1a;
            border: 1px solid #333;
            border-radius: 16px;
            padding: 30px;
            width: 90%;
            max-width: 480px;
            box-shadow: 0 10px 40px rgba(0,0,0,0.8);
            transform: translateY(30px);
            transition: all 0.3s ease;
            text-align: center;
        }
        .popup-bot-container.active .popup-bot-box {
            transform: translateY(0);
        }
     .popup-bot-btn-close {
    position: absolute;
    top: -38px;
    right: 16px;
    border: none;
    border-radius: 20px;
    color: white;
    background: black;
    font-size: 19px;
    cursor: pointer;
    transition: 0.2s;
    line-height: 1;
}
        .popup-bot-btn-close:hover {
            color: #fff;
        }
        @media (max-width: 480px) {
            .popup-bot-box {
                padding: 20px;
            }
        }
        .btn-primary {
background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
}
.current-price {
    font-size: var(--font-size-xl);
    font-weight: 800;
    color: #ffffff;
    font-size: 41px;
}