@font-face {
            font-family: "UTM Yen Tu";
            src: url("https://db.onlinewebfonts.com/t/3529347f039594a38ca454747f73565a.eot");
            src: url("https://db.onlinewebfonts.com/t/3529347f039594a38ca454747f73565a.eot?#iefix") format("embedded-opentype"), url("https://db.onlinewebfonts.com/t/3529347f039594a38ca454747f73565a.woff2") format("woff2"), url("https://db.onlinewebfonts.com/t/3529347f039594a38ca454747f73565a.woff") format("woff"), url("https://db.onlinewebfonts.com/t/3529347f039594a38ca454747f73565a.ttf") format("truetype"), url("https://db.onlinewebfonts.com/t/3529347f039594a38ca454747f73565a.svg#UTM Yen Tu") format("svg");
        }/* SnowStore Enhanced CSS - Modern Winter Theme */
        :root {
            --snow-blue: #ff5943;
            --ice-blue: #7FB3D3;
            --frost-white: #F8FAFB;
            --winter-gray: #E8F4F8;
            --deep-blue: #2C5282;
            --accent-cyan: #00B4D8;
            --text-dark: #2D3748;
            --snow-shadow: rgba(116, 185, 255, 0.2);
            --gradient-primary: linear-gradient(135deg, #ff5943, #7FB3D3);
            --gradient-secondary: linear-gradient(135deg, #E8F4F8, #F8FAFB);
            --glass-bg: rgba(255, 255, 255, 0.25);
            --glass-border: rgba(255, 255, 255, 0.18);
            --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* Global Styles */
        * {
            box-sizing: border-box;
        }

    body {
        background: white;
        color: var(--text-dark);
        font-family: "Helvetica Neue", Helvetica, Roboto, Arial, sans-serif;
        min-height: 100vh;
        position: relative;
        line-height: 1.6;
        overflow-x: hidden;
        padding-top: 37px;
        -webkit-overflow-scrolling: touch;
    }
        .lightbox {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.9);
            z-index: 9999;
            animation: fadeIn 0.3s ease;
        }

            .lightbox.show {
                display: block;
            }

        @@keyframes fadeIn {
            from {
                opacity: 0;
            }

            to {
                opacity: 1;
            }
        }


    .nav-link {
        padding: 4px 12px;
    }
    .lightbox-content {
        position: relative;
        width: 100%;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
        flex-direction: column;
    }

        .lightbox-thumbnails {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 10px;
            margin-top: 20px;
            max-width: 80%;
            overflow-x: auto;
            padding: 10px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 25px;
            backdrop-filter: blur(10px);
        }

        .lightbox-thumbnail {
            width: 60px;
            height: 60px;
            border: 2px solid transparent;
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s ease;
            flex-shrink: 0;
            overflow: hidden;
            background: rgba(255, 255, 255, 0.1);
        }

            .lightbox-thumbnail:hover {
                border-color: var(--secondary-color);
                transform: scale(1.05);
            }

            .lightbox-thumbnail.active {
                border-color: var(--primary-color);
                box-shadow: 0 0 0 2px rgba(24, 144, 255, 0.5);
            }

            .lightbox-thumbnail img {
                width: 100%;
                height: 100%;
                object-fit: cover;
            }

        .lightbox-close {
            position: absolute;
            top: 20px;
            right: 30px;
            color: white;
            font-size: 40px;
            cursor: pointer;
            z-index: 10000;
            background: rgba(0, 0, 0, 0.5);
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
        }

            .lightbox-close:hover {
                background: rgba(255, 255, 255, 0.2);
                transform: scale(1.1);
            }

        .lightbox-nav {
            position: absolute;
            top: 50%;
            transform: translateY(-50%);
            background: rgba(0, 0, 0, 0.5);
            color: white;
            border: none;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            cursor: pointer;
            font-size: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
        }

            .lightbox-nav:hover {
                background: rgba(255, 255, 255, 0.2);
                transform: translateY(-50%) scale(1.1);
            }

        .lightbox-prev {
            left: 30px;
        }

        .lightbox-next {
            right: 30px;
        }

        /* Enhanced Navbar Styles */
        .snow-navbar {
            background: black;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: none;
            position: fixed !important;
            top: 0;
            left: 0;
            right: 0;
            width: 100%;
            z-index: 1050;
            border-bottom: 2px solid rgba(255, 255, 255, 05);
            transition: var(--transition-smooth);

        }

            .snow-navbar.scrolled {
                background: black !important;
            }

        /* Brand Enhancement */
        .snow-brand {
            color: white !important;
            font-family: "Inter", sans-serif;
            font-weight: 600;
            font-size: 22px;
            letter-spacing: 4px; /* Quan trọng! Tạo cảm giác rộng rãi */
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
            text-decoration: none !important;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            transition: var(--transition-smooth);
            padding: 1em 0;
            margin: -30px 20px;
        }

            .snow-brand:hover {
                transform: scale(1.15);
                filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.5));
            }

        .brand-icon {
            animation: rotate 8s linear infinite;
            font-size: 1.5em;
            filter: drop-shadow(0 0 5px rgba(255, 255, 255, 0.3));
        }

        @keyframes rotate {
            from {
                transform: rotate(0deg);
            }

            to {
                transform: rotate(360deg);
            }
        }

        /* Enhanced Navigation Links */
        .navbar-nav {
            align-items: center;
            gap: 0.25rem;
        }

        .nav-link-custom {
            color: rgba(255, 255, 255, 0.95) !important;
            font-weight: 500;
            font-size: 15px;
            padding: 0 1em !important;
            margin: 0 0.1rem;
            transition: var(--transition-smooth);
            position: relative;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            white-space: nowrap;
            backdrop-filter: blur(10px);
            border: 1px solid transparent;
        }

            .nav-link-custom::before {
                content: '';
                position: absolute;
                top: 0;
                left: 0;
                right: 0;
                bottom: 0;
                opacity: 0;
                transition: opacity 0.3s ease;
                z-index: -1;
            }

            .nav-link-custom:hover::before {
                opacity: 1;
            }

            .nav-link-custom:hover {
                color: #ff0000 !important;
                transform: scale(1.2);
            }

            .nav-link-custom.active {
                color: #ff0000 !important;
                backdrop-filter: blur(15px);
                font-weight: 600;
            }


            .nav-link-custom i {
                font-size: 0.95em;
                margin-right: 0.25rem;
            }

        /* Admin and Special Links */

        .btn-register {
            background: linear-gradient(135deg, var(--accent-cyan), #0099cc) !important;
            border: 1px solid var(--accent-cyan) !important;
            border-radius: 30px !important;
            font-weight: 600;
            padding: 0.75rem 1.5rem !important;
            transition: var(--transition-smooth);
        }

            .btn-register:hover {
                background: linear-gradient(135deg, #0099cc, var(--accent-cyan)) !important;
                transform: translateY(-2px);
                box-shadow: 0 6px 20px rgba(0, 180, 216, 0.4);
                color: white !important;
            }

        /* Enhanced Search Bar */
        .search-form {
            min-width: 320px;
            position: relative;
        }

        .input-group {
            border-radius: 30px;
            overflow: hidden;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
            transition: var(--transition-smooth);
        }

        .search-input {
            border: none;
            border-radius: 30px 0 0 30px;
            background: rgba(255, 255, 255, 0.95);
            color: var(--text-dark);
            box-shadow: none;
            padding: 0.75rem 1.25rem;
            font-size: 0.95rem;
            transition: var(--transition-smooth);
            backdrop-filter: blur(10px);
        }

            .search-input:focus {
                background: white;
                box-shadow: inset 0 0 0 2px var(--accent-cyan);
                outline: none;
            }

            .search-input::placeholder {
                color: rgba(45, 55, 72, 0.6);
                font-size: 0.9rem;
            }

        .search-btn {
            background: linear-gradient(135deg, var(--accent-cyan), #0099cc);
            border: none;
            border-radius: 0 30px 30px 0;
            color: white;
            padding: 0.75rem 1.25rem;
            transition: var(--transition-smooth);
            font-size: 1rem;
        }

            .search-btn:hover {
                background: linear-gradient(135deg, #0099cc, var(--deep-blue));
                transform: scale(1.05);
                box-shadow: 0 4px 15px rgba(0, 180, 216, 0.4);
            }

        .search-form:focus-within .input-group {
            transform: scale(1.02);
            box-shadow: 0 6px 25px rgba(0, 180, 216, 0.2);
        }

        /* Enhanced Dropdown Menus */
        .snow-dropdown {
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 20px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
            padding: 0.75rem;
            margin-top: 0.75rem;
            animation: dropdownFadeIn 0.3s ease;
        }

        @keyframes dropdownFadeIn {
            from {
                opacity: 0;
                transform: translateY(-10px);
            }

            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .snow-dropdown .dropdown-item {
            border-radius: 12px;
            padding: 0.75rem 1rem;
            color: var(--text-dark);
            transition: var(--transition-smooth);
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-size: 0.95rem;
            font-weight: 500;
        }

            .snow-dropdown .dropdown-item:hover {
                background: linear-gradient(135deg, var(--winter-gray), rgba(248, 250, 251, 0.8));
                color: var(--snow-blue);
                transform: translateX(5px);
            }

            .snow-dropdown .dropdown-item.text-danger:hover {
                background: linear-gradient(135deg, rgba(220, 53, 69, 0.1), rgba(220, 53, 69, 0.05));
                color: #dc3545;
            }

            .snow-dropdown .dropdown-item i {
                width: 16px;
                text-align: center;
            }

        /* User Menu Enhancement */
        .user-menu {
            backdrop-filter: blur(10px);
        }
        .navbar-collapse {
            transition: all 0.25s ease-out; /* Transition ngắn gọn hơn */
            transform-origin: top;
            will-change: transform, opacity; /* Optimize cho GPU */
        }

            .navbar-collapse.collapsing {
                transition: height 0.25s ease-out; /* Chỉ animate height */
                overflow: hidden;
            }

            .navbar-collapse.show {
                animation: slideDown 0.25s ease-out;
            }

        /* Mobile Responsive Navigation */
        /* Mobile Responsive Navigation - Improved Layout */
        @media (max-width: 991px) {
            .navbar-collapse {
                background: black;
                backdrop-filter: blur(20px);
                border-radius: 20px;
                margin-top: 1rem;
                padding: 1.5rem;
                box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
                border: 1.5px solid white;
            }

            /* Mobile navbar nav alignment */
            .navbar-nav {
                align-items: stretch !important;
                gap: 0;
                margin-bottom: 1rem;
            }

            /* Mobile nav links - left aligned and compact */
            .nav-link-custom {
                color: white;
                margin: 0.15rem 0;
                justify-content: flex-start;
                text-align: left;
                padding: 0.75rem 1rem !important;
                border-radius: 12px;
                font-size: 0.95rem;
                width: 100%;
                display: flex;
                align-items: center;
                gap: 0.75rem;
            }

                .nav-link-custom:hover {
                    background: none;
                    color: white !important;
                    transform: translateX(5px);
                }

                .nav-link-custom.active {
                    background: var(--gradient-primary);
                    color:white !important;
                    box-shadow: 0 4px 15px rgba(74, 144, 226, 0.3);
                }

            /* Admin dropdown in mobile */
            .admin-link {
                background: linear-gradient(135deg, rgba(255, 193, 7, 0.2), rgba(255, 193, 7, 0.1)) !important;
                border: 1px solid rgba(255, 193, 7, 0.3) !important;
                color: var(--text-dark) !important;
            }

                .admin-link:hover {
                    background: linear-gradient(135deg, rgba(255, 193, 7, 0.3), rgba(255, 193, 7, 0.2)) !important;
                    color: #e67e22 !important;
                }

            /* Mobile dropdown menu */
            .snow-dropdown {
                position: static !important;
                transform: none !important;
                box-shadow: none;
                background: rgba(248, 250, 251, 0.8);
                margin: 0.5rem 0 0 1rem;
                padding: 0.5rem;
                border-radius: 12px;
                border: 1px solid rgba(232, 244, 248, 0.8);
                width: calc(100% - 1rem);
            }

                .snow-dropdown .dropdown-item {
                    padding: 0.6rem 1rem;
                    font-size: 0.9rem;
                    border-radius: 8px;
                }

            /* Mobile search form - full width and compact */
            .search-form {
                min-width: 100%;
                margin: 1rem 0;
                order: 2;
            }

            .search-input {
                font-size: 0.95rem;
                padding: 0.75rem 1rem;
            }

            .search-btn {
                padding: 0.75rem 1rem;
            }

            /* Mobile user menu - properly aligned */
        /*    .navbar-nav:last-child {
                margin-top: 0.5rem;
                border-top: 1px solid rgba(232, 244, 248, 0.8);
                padding-top: 1rem;
            }*/

            /* Register button in mobile */
            .btn-register {
                margin-top: 0.5rem;
                text-align: center;
                justify-content: center;
                background: #3498db !important;
                color: white !important;
                border: none !important;
                font-weight: 600;
            }

                .btn-register:hover {
                    background: linear-gradient(135deg, #0099cc, var(--accent-cyan)) !important;
                    color: white !important;
                    transform: translateX(5px);
                }

            /* User dropdown menu in mobile */
            .user-menu {
                background: rgba(74, 144, 226, 0.1) !important;
                color: var(--snow-blue) !important;
                border: 1px solid rgba(74, 144, 226, 0.2) !important;
            }

            /* Mobile brand adjustment */
            .snow-brand {
                font-size: 26px;
            }

            /* Ensure proper ordering */
            .navbar-collapse .navbar-nav:first-child {
                order: 1;
            }

            .search-form {
                order: 2;
            }

            .navbar-collapse .navbar-nav:last-child {
                order: 3;
            }
        }

        /* Extra small mobile devices */
        @media (max-width: 576px) {
            .navbar-collapse {
                padding: 1rem;
                margin-top: 0.75rem;
                border-radius: 16px;
            }

            .nav-link-custom {
                padding: 0.65rem 0.85rem !important;
                font-size: 0.9rem;
                gap: 0.6rem;
            }

            .search-input {
                font-size: 0.9rem;
                padding: 0.65rem 0.9rem;
            }

            .search-btn {
                padding: 0.65rem 0.9rem;
            }

            .snow-brand {
                font-size: 1.4rem;
            }

            .brand-icon {
                font-size: 1.3em;
            }
        }

        /* Main Container */
        .main-container {
            padding-top: 2rem;
            min-height: calc(100vh - 200px);
            position: relative;
            z-index: 1;
        }

        /* Enhanced Footer */
        .snow-footer {
        /*    background: var(--gradient-primary);*/
            background: black;
            color: white;
            padding: 4rem 0 2rem;
        /*    margin-top: 4rem;*/
            position: relative;
            overflow: hidden;
            z-index: 10; /* Ensure footer doesn't interfere with back-to-top */
        }

            .snow-footer::before {
                content: '';
                position: absolute;
                top: 0;
                left: 0;
                right: 0;
                height: 2px;
                background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.5), transparent);
            }

        .footer-brand {
            font-size: 1.6rem;
            font-weight: bold;
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

            .footer-brand i {
                animation: rotate 6s linear infinite reverse;
                filter: drop-shadow(0 0 5px rgba(255, 255, 255, 0.3));
            }

        .footer-text {
            opacity: 0.9;
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
        }

        .footer-links a {
            color: white;
            text-decoration: none;
            transition: var(--transition-smooth);
            padding: 0.25rem 0.5rem;
            border-radius: 8px;
            display: inline-block;
        }

            .footer-links a:hover {
                color: var(--winter-gray);
                background: rgba(255, 255, 255, 0.1);
                transform: translateY(-2px);
            }

        .footer-copyright {
            margin-top: 2rem;
            opacity: 0.8;
            font-size: 0.95rem;
            padding-top: 1rem;
            border-top: 1px solid rgba(255, 255, 255, 0.2);
        }

        /* Enhanced Snowflake Animation */
        .snowflakes {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            overflow: hidden;
            z-index: 1;
        }

        .snowflake {
            position: absolute;
            top: -10px;
            color: rgba(255, 255, 255, 0.8);
            user-select: none;
            pointer-events: none;
            animation: fall linear infinite;
            text-shadow: 0 0 5px rgba(255, 255, 255, 0.5);
        }

            .snowflake:nth-child(1) {
                left: 10%;
                animation-duration: 8s;
                font-size: 1.2rem;
                animation-delay: 0s;
            }

            .snowflake:nth-child(2) {
                left: 20%;
                animation-duration: 12s;
                font-size: 0.8rem;
                animation-delay: 2s;
            }

            .snowflake:nth-child(3) {
                left: 30%;
                animation-duration: 10s;
                font-size: 1rem;
                animation-delay: 4s;
            }

            .snowflake:nth-child(4) {
                left: 40%;
                animation-duration: 14s;
                font-size: 1.4rem;
                animation-delay: 1s;
            }

            .snowflake:nth-child(5) {
                left: 50%;
                animation-duration: 9s;
                font-size: 0.9rem;
                animation-delay: 3s;
            }

            .snowflake:nth-child(6) {
                left: 60%;
                animation-duration: 11s;
                font-size: 1.1rem;
                animation-delay: 5s;
            }

            .snowflake:nth-child(7) {
                left: 70%;
                animation-duration: 13s;
                font-size: 1.3rem;
                animation-delay: 2s;
            }

            .snowflake:nth-child(8) {
                left: 80%;
                animation-duration: 7s;
                font-size: 0.7rem;
                animation-delay: 4s;
            }

            .snowflake:nth-child(9) {
                left: 90%;
                animation-duration: 15s;
                font-size: 1.5rem;
                animation-delay: 1s;
            }

            .snowflake:nth-child(10) {
                left: 5%;
                animation-duration: 6s;
                font-size: 1rem;
                animation-delay: 3s;
            }

        @keyframes fall {
            from {
                transform: translateY(-100px) rotate(0deg);
                opacity: 1;
            }

            to {
                transform: translateY(calc(100vh + 100px)) rotate(360deg);
                opacity: 0;
            }
        }

        /* Enhanced Button Styles */
        .btn-snow {
            background: var(--gradient-primary);
            border: none;
            color: white;
            border-radius: 30px;
            padding: 0.875rem 2.5rem;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition-smooth);
            box-shadow: 0 6px 20px rgba(74, 144, 226, 0.3);
            position: relative;
            overflow: hidden;
            text-transform: none;
            letter-spacing: 0.025em;
        }

            .btn-snow::before {
                content: '';
                position: absolute;
                top: 0;
                left: -100%;
                width: 100%;
                height: 100%;
                background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
                transition: left 0.6s;
            }

            .btn-snow:hover::before {
                left: 100%;
            }

            .btn-snow:hover {
                transform: translateY(-3px);
                box-shadow: 0 10px 30px rgba(74, 144, 226, 0.4);
                color: white;
                background: linear-gradient(135deg, #5ba0f2, #8fc5dd);
            }

            .btn-snow:active {
                transform: translateY(-1px);
                transition: transform 0.1s;
            }

        /* Enhanced Card Styles */
        .card-snow {
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 24px;
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
            transition: var(--transition-smooth);
            overflow: hidden;
            position: relative;
        }

            .card-snow::before {
                content: '';
                position: absolute;
                top: 0;
                left: -100%;
                width: 100%;
                height: 3px;
                background: var(--gradient-primary);
                transition: left 0.6s ease;
            }

            .card-snow:hover::before {
                left: 0;
            }

            .card-snow:hover {
                transform: translateY(-8px) scale(1.02);
                box-shadow: 0 20px 60px rgba(74, 144, 226, 0.15);
                border-color: rgba(74, 144, 226, 0.2);
            }

        /* Styling cho brands có 0 sản phẩm */
        .brand-item.no-products {
            opacity: 0.5;
            pointer-events: none;
            cursor: not-allowed;
        }

            .brand-item.no-products .brand-count {
                color: #999;
            }

            .brand-item.no-products .brand-name {
                color: #999;
            }

        /* Đảm bảo brand active luôn hiển thị bình thường */
        .brand-item.active {
            opacity: 1 !important;
            pointer-events: auto !important;
            cursor: pointer !important;
        }

            .brand-item.active .brand-count,
            .brand-item.active .brand-name {
                color: inherit !important;
            }
        /* Fixed Back to Top Button */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 60px; /* nhỏ gọn */
            height: 60px; /* chiều cao bằng chiều rộng => tròn */
            border-radius: 50%;
            background: var(--gradient-primary);
            border: none;
            color: white;
            font-size: 1rem; /* icon vừa */
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px) scale(0.8);
            transition: var(--transition-smooth);
            z-index: 9999;
            box-shadow: 0 4px 15px rgba(74, 144, 226, 0.35);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            display: flex; /* Thêm để căn icon */
            align-items: center; /* Căn giữa dọc */
            justify-content: center; /* Căn giữa ngang */
            padding: 0; /* Bỏ padding thừa */
        }



            .back-to-top.show {
                opacity: 1;
                visibility: visible;
                transform: translateY(0) scale(1);
            }

            .back-to-top:hover {
                transform: translateY(-5px) scale(1.1);
                box-shadow: 0 10px 35px rgba(74, 144, 226, 0.6);
                color: white;
                background: linear-gradient(135deg, #5ba0f2, #8fc5dd);
            }

            .back-to-top:active {
                transform: translateY(-3px) scale(1.05);
            }

        /* Loading Animation */
        .loading-snow {
            display: inline-block;
            width: 20px;
            height: 20px;
            border: 3px solid rgba(255, 255, 255, 0.3);
            border-radius: 50%;
            border-top-color: white;
            animation: spin 1s ease-in-out infinite;
        }

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

        /* Enhanced Notification System */
        .snow-notification {
            position: fixed;
            top: 20px;
            right: 20px;
            min-width: 320px;
            max-width: 420px;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(20px);
            border-radius: 16px;
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
            z-index: 10001;
            transform: translateX(450px);
            transition: var(--transition-smooth);
            border-left: 4px solid var(--snow-blue);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

            .snow-notification.show {
                transform: translateX(0);
            }

            .snow-notification.success {
                border-left-color: #28a745;
            }

            .snow-notification.error {
                border-left-color: #dc3545;
            }

            .snow-notification.warning {
                border-left-color: #ffc107;
            }

        .notification-content {
            padding: 1.25rem 1.5rem;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .notification-close {
            background: none;
            border: none;
            color: #999;
            cursor: pointer;
            padding: 0.25rem;
            margin-left: auto;
            transition: color 0.3s;
            border-radius: 6px;
        }

            .notification-close:hover {
                color: #666;
                background: rgba(0, 0, 0, 0.05);
            }

        /* Enhanced Search Suggestions */
        .search-suggestions {
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(20px);
            border-radius: 0 0 20px 20px;
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
            z-index: 1000;
            max-height: 320px;
            overflow-y: auto;
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-top: none;
        }

        .suggestion-item {
            padding: 0.875rem 1.25rem;
            cursor: pointer;
            transition: var(--transition-smooth);
            border-bottom: 1px solid rgba(232, 244, 248, 0.5);
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-size: 0.95rem;
        }

            .suggestion-item:hover {
                background: linear-gradient(135deg, var(--winter-gray), rgba(248, 250, 251, 0.8));
                color: var(--snow-blue);
                padding-left: 1.75rem;
            }

            .suggestion-item:last-child {
                border-bottom: none;
                border-radius: 0 0 20px 20px;
            }

        /* Enhanced Form Controls */
        .form-control {
            border: 2px solid var(--winter-gray);
            border-radius: 16px;
            padding: 0.875rem 1.25rem;
            transition: var(--transition-smooth);
            background: rgba(255, 255, 255, 0.9);
            font-size: 0.95rem;
            backdrop-filter: blur(10px);
        }

            .form-control:focus {
                border-color: var(--snow-blue);
                box-shadow: 0 0 0 0.2rem rgba(74, 144, 226, 0.15);
                background: white;
                transform: translateY(-1px);
            }

            .form-control.is-invalid {
                border-color: #dc3545;
                animation: shake 0.6s;
            }

        @keyframes shake {
            0%, 100% {
                transform: translateX(0);
            }

            25% {
                transform: translateX(-8px);
            }

            75% {
                transform: translateX(8px);
            }
        }

        /* Fade In Animation */
        .fade-in {
            opacity: 0;
            transform: translateY(30px);
            animation: fadeInUp 0.8s forwards;
        }

        @keyframes fadeInUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* Cart Badge Animation */
        .cart-badge {
            background: #dc3545;
            color: white;
            border-radius: 50%;
            padding: 0.3rem 0.6rem;
            font-size: 0.8rem;
            min-width: 22px;
            text-align: center;
            transition: var(--transition-smooth);
            font-weight: 600;
        }

            .cart-badge.bounce {
                animation: bounce 0.6s;
            }

        @keyframes bounce {
            0%, 20%, 60%, 100% {
                transform: translateY(0);
            }

            40% {
                transform: translateY(-12px);
            }

            80% {
                transform: translateY(-6px);
            }
        }

        /* Enhanced Navbar Toggler */
        .navbar-toggler {
            transition: all 0.2s ease; /* Giảm thời gian transition */
            position: relative;
            z-index: 1051; /* Đảm bảo luôn ở trên */
        }



        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='white' stroke-linecap='round' stroke-width='2.5' d='M4 7h22M6 15h20M4 23h22'/%3e%3c/svg%3e");
            transition: transform 0.15s ease; /* Giảm thời gian animation */
            width: 1.25em;
            height: 1.25em;
        }

        .navbar-toggler:hover .navbar-toggler-icon {
            transform: scale(1.05); /* Giảm scale để ít lag hơn */
        }

        /* Accessibility Improvements */
        @media (prefers-reduced-motion: reduce) {
            *,
            ::before,
            ::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
        }

        /* High contrast mode support */
        @media (prefers-contrast: high) {
            .snow-navbar {
                background: #1a365d !important;
                border-bottom: 2px solid #fff;
            }

            .nav-link-custom {
                border: 1px solid rgba(255, 255, 255, 0.5) !important;
            }

            .btn-snow {
                border: 2px solid #fff;
            }
        }

        /* Focus styles for accessibility */
        .nav-link-custom:focus,
        .btn-snow:focus,
        .search-input:focus,
        .search-btn:focus {
            outline: 3px dotted solid rgba(255, 255, 255, 0.6);
            outline-offset: 2px;
            border: 2px dotted rgba(255, 255, 255, 0.4);
        }

        /* Print styles */
        @media print {
            .snow-navbar,
            .back-to-top,
            .snowflakes,
            .snow-notification {
                display: none !important;
            }

            body {
                background: white !important;
                color: black !important;
            }
        }

        /* Additional spacing and layout improvements */
        .container {
            max-width: 1200px;
        }

        @media (min-width: 1400px) {
            .container {
                max-width: 1320px;
            }
        }

        /* Smooth scrolling for the entire page */
        html {
            scroll-behavior: smooth;
        }

        /* Enhanced hover states for better user feedback */
        a, button {
            transition: var(--transition-smooth);
        }

        /* Ensure proper stacking context */
        .main-container {
            position: relative;
            z-index: 1;
        }

        /* Product Card Enhancements */
        .product-card {
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(20px);
            border-radius: 24px;
            overflow: hidden;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
            transition: var(--transition-smooth);
            position: relative;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .product-image {
            position: relative;
            overflow: hidden;
            border-radius: 24px 24px 0 0;
            height: 250px;
            background: var(--winter-gray);
        }

            .product-image img {
                width: 100%;
                height: 100%;
                object-fit: cover;
                transition: transform 0.6s ease;
            }

            .product-image:hover img {
                transform: scale(1.1);
            }

        .product-badge {
            position: absolute;
            top: 16px;
            left: 16px;
            background: linear-gradient(135deg, var(--accent-cyan), #0099cc);
            color: white;
            padding: 0.4rem 1rem;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            backdrop-filter: blur(10px);
            box-shadow: 0 4px 15px rgba(0, 180, 216, 0.3);
        }

        .product-actions {
            position: absolute;
            top: 16px;
            right: 16px;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
            opacity: 0;
            transform: translateX(20px);
            transition: var(--transition-smooth);
        }

        .product-card:hover .product-actions {
            opacity: 1;
            transform: translateX(0);
        }

        .action-btn {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(15px);
            border: 1px solid rgba(255, 255, 255, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition-smooth);
            color: var(--text-dark);
            font-size: 1rem;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
        }

            .action-btn:hover {
                background: var(--snow-blue);
                color: white;
                transform: scale(1.1);
                box-shadow: 0 6px 20px rgba(74, 144, 226, 0.3);
            }

        /* Image Zoom Effect */
        .product-image.zoomed {
            transform: scale(1.05);
            cursor: zoom-in;
        }

        /* Glass morphism utilities */
        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--glass-border);
            border-radius: 20px;
            box-shadow: 0 8px 32px rgba(31, 38, 135, 0.15);
        }

        /* Enhanced breadcrumb styles */
        .breadcrumb {
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(10px);
            border-radius: 15px;
            padding: 0.75rem 1.5rem;
            margin-bottom: 2rem;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .breadcrumb-item a {
            color: var(--snow-blue);
            text-decoration: none;
            transition: var(--transition-smooth);
        }

            .breadcrumb-item a:hover {
                color: var(--deep-blue);
                text-decoration: underline;
            }

        /* Enhanced pagination */
        .pagination .page-link {
            color: var(--snow-blue);
            background: rgba(255, 255, 255, 0.9);
            border: 1px solid var(--winter-gray);
            border-radius: 12px;
            margin: 0 0.25rem;
            padding: 0.75rem 1rem;
            transition: var(--transition-smooth);
            backdrop-filter: blur(10px);
        }

            .pagination .page-link:hover {
                color: white;
                background: var(--gradient-primary);
                border-color: var(--snow-blue);
                transform: translateY(-2px);
                box-shadow: 0 4px 15px rgba(74, 144, 226, 0.3);
            }

        .pagination .page-item.active .page-link {
            background: var(--gradient-primary);
            border-color: var(--snow-blue);
            color: white;
            box-shadow: 0 4px 15px rgba(74, 144, 226, 0.3);
        }

        /* Enhanced modal styles */
        .modal-content {
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 24px;
            box-shadow: 0 20px 80px rgba(0, 0, 0, 0.15);
        }

        .modal-header {
            border-bottom: 1px solid rgba(232, 244, 248, 0.5);
            border-radius: 24px 24px 0 0;
            padding: 1.5rem 2rem 1rem;
        }

        .modal-body {
            padding: 1.5rem 2rem;
        }

        .modal-footer {
            border-top: 1px solid rgba(232, 244, 248, 0.5);
            border-radius: 0 0 24px 24px;
            padding: 1rem 2rem 1.5rem;
        }

        /* Enhanced table styles */
        .table {
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
        }

            .table thead th {
                background: var(--gradient-primary);
                color: white;
                border: none;
                padding: 1rem 1.5rem;
                font-weight: 600;
            }

            .table tbody td {
                padding: 1rem 1.5rem;
                border-color: rgba(232, 244, 248, 0.5);
                vertical-align: middle;
            }

            .table tbody tr:hover {
                background: rgba(74, 144, 226, 0.05);
            }

        /* Enhanced alert styles */
        .alert {
            border: none;
            border-radius: 16px;
            padding: 1rem 1.5rem;
            backdrop-filter: blur(10px);
            border-left: 4px solid;
        }

        .alert-info {
            background: rgba(74, 144, 226, 0.1);
            border-left-color: var(--snow-blue);
            color: var(--deep-blue);
        }

        .alert-success {
            background: rgba(40, 167, 69, 0.1);
            border-left-color: #28a745;
            color: #155724;
        }

        .alert-warning {
            background: rgba(255, 193, 7, 0.1);
            border-left-color: #ffc107;
            color: #856404;
        }

        .alert-danger {
            background: rgba(220, 53, 69, 0.1);
            border-left-color: #dc3545;
            color: #721c24;
        }

        /* Enhanced progress bars */
        .progress {
            height: 12px;
            background: rgba(232, 244, 248, 0.8);
            border-radius: 10px;
            overflow: hidden;
            backdrop-filter: blur(10px);
        }

        .progress-bar {
            background: var(--gradient-primary);
            border-radius: 10px;
            transition: width 0.6s ease;
        }

        /* Enhanced badge styles */
        .badge {
            padding: 0.4rem 0.8rem;
            border-radius: 12px;
            font-weight: 600;
            font-size: 0.8rem;
        }

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

        .badge-secondary {
            background: rgba(108, 117, 125, 0.9);
            color: white;
        }

        /* Improved responsive design */
        @media (max-width: 768px) {
            .snow-brand {
                font-size: 1.4rem;
            }

            .nav-link-custom {
                padding: 0.6rem 1rem !important;
                font-size: 0.9rem;
            }

            .search-form {
                margin: 0.75rem 0;
            }

            .btn-snow {
                padding: 0.75rem 2rem;
                font-size: 0.95rem;
            }

            .back-to-top {
                width: 50px;
                height: 50px;
                bottom: 20px;
                right: 20px;
                font-size: 1.1rem;
            }

            .snow-notification {
                min-width: 280px;
                max-width: calc(100vw - 40px);
                right: 20px;
            }

            .main-container {
                padding-top: 1.5rem;
            }

            .snow-footer {
                padding: 3rem 0 1.5rem;
            }
        }

        @media (max-width: 576px) {
            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }

            .search-input {
                font-size: 0.9rem;
            }

            .product-image {
                height: 200px;
            }

            .card-snow {
                border-radius: 20px;
                margin-bottom: 1.5rem;
            }
        }

        /* Dark mode support (optional) */
        @media (prefers-color-scheme: dark) {
            body.auto-theme {
                --frost-white: #1a1a1a;
                --winter-gray: #2d2d2d;
                --text-dark: #e0e0e0;
                background: linear-gradient(135deg, #1a1a1a, #2d2d2d);
            }

                body.auto-theme .card-snow {
                    background: rgba(45, 45, 45, 0.9);
                    color: #e0e0e0;
                }

                body.auto-theme .form-control {
                    background: rgba(45, 45, 45, 0.9);
                    color: #e0e0e0;
                    border-color: #404040;
                }
        }

        /* Performance optimizations */
        .card-snow,
        .product-card,
        .btn-snow,
        .nav-link-custom {
            will-change: transform, box-shadow;
        }

        /* Reduced motion support */
        @media (prefers-reduced-motion: reduce) {
            .snowflake {
                animation-duration: 0s !important;
            }

            .brand-icon {
                animation: none !important;
            }
        }

        /* High DPI display support */
        @media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
            .snow-navbar {
                backdrop-filter: blur(15px);
                -webkit-backdrop-filter: blur(15px);
            }

            .card-snow {
                backdrop-filter: blur(15px);
                -webkit-backdrop-filter: blur(15px);
            }
        }


        /* ===== MOBILE SIDEBAR NAVIGATION ===== */
        /* Overlay khi sidebar mở */
        .mobile-nav-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            backdrop-filter: blur(4px);
            z-index: 2000;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }

            .mobile-nav-overlay.active {
                opacity: 1;
                visibility: visible;
            }

        /* Mobile Sidebar */
        .mobile-sidebar {
            position: fixed;
            top: 0;
            right: -100%;
            width: 80%;
            max-width: 320px;
            height: 100vh;
            background: white;
            z-index: 2001;
            transition: right 0.55s cubic-bezier(0.4, 0, 0.2, 1);
            overflow-y: auto;
            box-shadow: -5px 0 25px rgba(0, 0, 0, 0.2);
        }

            .mobile-sidebar.active {
                right: 0;
            }

        /* Sidebar Header */
        .mobile-sidebar-header {
            display: flex;
            justify-content: right;
            align-items: center;
            padding: 30px 35px 0 35px;
            color: white;
        }

        .mobile-sidebar-logo {
            font-family: "Brush Script MT", "Lucida Handwriting", cursive;
            font-size: 1.8rem;
            font-weight: 700;
            color: white;
        }

        .mobile-sidebar-close {
            background: none;
            border: none;
            color: black;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            transition: all 0.3s ease;
        }

            .mobile-sidebar-close:hover {
                background: rgba(255, 255, 255, 0.1);
                transform: rotate(90deg);
            }

        /* Sidebar Menu */
        .mobile-sidebar-menu {
            padding: 1rem 0;
            border-bottom: 1px solid rgba(84,84,84,0.1) !important;
        }

        .mobile-menu-item {
            display: block;
            padding: 1rem 1.5rem;
            color: #2D3748;
            text-decoration: none;
            font-size: 1rem;
            font-weight: 530;
            border-left: 3px solid transparent;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

            .mobile-menu-item:hover {
                background: #f8f9fa;
                border-left-color: #ff5943;
                color: #ff5943;
                padding-left: 2rem;
            }

            .mobile-menu-item.active {
                background: #ececec;
                color: #ff5943;
            }

            .mobile-menu-item i {
                width: 20px;
                text-align: center;
            }

        /* Dropdown in Sidebar */
        .mobile-dropdown {
            border-top: 1px solid #e8e8e8;
        }

        .mobile-dropdown-toggle {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 1.5rem;
            background: none;
            border: none;
            color: #2D3748;
            font-size: 1rem;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s ease;
        }

            .mobile-dropdown-toggle:hover {
                background: #f8f9fa;
                color: #ff5943;
            }

            .mobile-dropdown-toggle i.chevron {
                transition: transform 0.3s ease;
            }

        .mobile-dropdown.active .mobile-dropdown-toggle i.chevron {
            transform: rotate(180deg);
        }

        .mobile-dropdown-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            background: #f8f9fa;
        }

        .mobile-dropdown.active .mobile-dropdown-content {
            max-height: 500px;
        }

        .mobile-dropdown-item {
            display: block;
            padding: 0.875rem 1.5rem 0.875rem 3rem;
            color: #2D3748;
            text-decoration: none;
            font-size: 0.95rem;
            transition: all 0.3s ease;
        }

            .mobile-dropdown-item:hover {
                background: white;
                color: #ff5943;
                padding-left: 3.5rem;
            }

        /* User Section */
    .mobile-user-section {
        padding: 1.5rem;
        background: #f8f9fa;
        margin-top: auto;
        border-bottom: 1px solid #e8e8e8;
    }

        .mobile-user-info {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .mobile-user-avatar {
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: #ff5943;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1rem;
        }

        .mobile-user-name {
            font-weight: 600;
            color: #2D3748;
        }

        .mobile-logout-btn {
            width: 100%;
            padding: 0.875rem;
            background: white;
            color: red;
            border: none;
            border-radius: 12px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
        }

            .mobile-logout-btn:hover {
                background: #c82333;
                transform: translateY(-2px);
                box-shadow: 0 4px 12px rgba(220, 53, 69, 0.3);
            }

        /* Hide sidebar on desktop */
        @media (min-width: 992px) {
            .mobile-nav-overlay,
            .mobile-sidebar {
                display: none;
            }
        }
        .submenu {
            font-size: 14px;
            position: absolute;
            top: 120%;
            left: 0;
            z-index: 1000;
            min-width: 15rem;
            padding: 1.2rem 0.5rem;
            margin: 0;
            list-style: none;
            background-color: #fff;
            border: 1px solid rgba(0,0,0,.15);
            border-radius: 0.25rem;
            box-shadow: 0 0.5rem 1rem rgba(0,0,0,.175);
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.4s ease, transform 0.4s ease, visibility 0.4s;
            white-space: nowrap;
        }

            .submenu.show {
                opacity: 1;
                visibility: visible;
            }

        .submenu-item {
            display: block;
            width: 100%;
            padding: 0.5rem 1rem;
            font-weight: 400;
            color: #212529;
            text-decoration: none;
            background-color: transparent;
            transition: color 0.3s ease, background-color 0.3s ease;
        }

        .submenu-text {
            position: relative;
            display: inline-block;
        }

            .submenu-text::after {
                content: '';
                position: absolute;
                bottom: -2px;
                left: 0;
                width: 0;
                height: 2px;
                background-color: black;
                transition: width 0.3s ease;
            }

        .submenu-item:hover {
            background-color: white;
            color: black;
        }

            .submenu-item:hover .submenu-text::after {
                width: 100%;
            }


    /* User Submenu Styles */
    .user-submenu {
        font-size: 14px;
        position: absolute;
        top: 120%;
        right: 0;
        left: auto;
        z-index: 1000;
        min-width: 12rem;
        padding: 1rem 0.5rem;
        margin: 0;
        list-style: none;
        background-color: #fff;
        border: 1px solid rgba(0,0,0,.15);
        border-radius: 0.25rem;
        box-shadow: 0 0.5rem 1rem rgba(0,0,0,.175);
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.4s ease, transform 0.4s ease, visibility 0.4s;
        white-space: nowrap;
    }

        .user-submenu.show {
            opacity: 1;
            visibility: visible;
        }

    .user-submenu-item {
        display: block;
        width: 100%;
        padding: 0.5rem 1rem;
        font-weight: 400;
        color: #212529;
        text-decoration: none;
        background-color: transparent;
        transition: color 0.3s ease, background-color 0.3s ease;
    }

    .user-submenu-text {
        position: relative;
        display: inline-block;
    }

        .user-submenu-text::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background-color: black;
            transition: width 0.3s ease;
        }

    .user-submenu-item:hover {
        background-color: #f8f9fa;
        color: black;
    }

        .user-submenu-item:hover .user-submenu-text::after {
            width: 100%;
        }

    /* Text danger cho logout */
    .user-submenu-item.text-danger:hover {
        color: #dc3545 !important;
    }

        .user-submenu-item.text-danger:hover .user-submenu-text::after {
            background-color: #dc3545;
        }

    /* Dropdown divider */
    .user-submenu .dropdown-divider {
        margin: 0.5rem 0;
        border-top: 1px solid rgba(0, 0, 0, 0.1);
    }