/*
        ---------------------------------------------------------------------
        GLOBAL STYLES & VARIABLES
        ---------------------------------------------------------------------
        */
        :root {
            /* Colors */
            --color-primary-bg: #1a1a2e; /* Dark Blue */
            --color-secondary-bg: #16213e; /* Slightly Lighter Dark Blue */
            --color-accent: #e94560; /* Vibrant Red/Pink Accent */
            --color-text-light: #f0f0f0; /* Light Gray Text */
            --color-text-dark: #cccccc; /* Slightly Darker Gray Text */
            --color-white: #ffffff;
            --color-dark-gray: #333333;

            /* Typography */
            --font-heading: 'Poppins', sans-serif;
            --font-body: 'Open Sans', sans-serif;

            /* Spacing & Sizing */
            --section-padding: 80px;
            --container-max-width: 1200px;
            --border-radius-soft: 8px;
            --transition-speed: 0.3s;
        }

        /* Universal box-sizing & smooth scroll */
        html {
            box-sizing: border-box;
            scroll-behavior: smooth;
        }
        *, *::before, *::after {
            box-sizing: inherit;
        }

        body {
            font-family: var(--font-body);
            line-height: 1.6;
            color: var(--color-text-light);
            background-color: var(--color-primary-bg);
            margin: 0;
            overflow-x: hidden;
        }

        body.no-scroll {
            overflow: hidden;
        }

        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-heading);
            color: var(--color-white);
            margin-bottom: 0.5em;
            line-height: 1.2;
        }
        h1 { font-size: 3.5em; }
        h2 { font-size: 2.5em; }
        h3 { font-size: 1.8em; }

        a {
            color: var(--color-accent);
            text-decoration: none;
            transition: color var(--transition-speed) ease;
        }
        a:hover {
            color: var(--color-white);
        }

        .btn {
            display: inline-block;
            padding: 12px 28px;
            border-radius: var(--border-radius-soft);
            font-family: var(--font-heading);
            font-weight: 600;
            text-transform: uppercase;
            transition: all var(--transition-speed) ease;
            cursor: pointer;
            border: none;
            text-align: center;
            white-space: nowrap;
        }
        .btn-primary {
            background-color: var(--color-accent);
            color: var(--color-white);
            box-shadow: 0 4px 15px rgba(233, 69, 96, 0.4);
        }
        .btn-primary:hover {
            background-color: #ff5779; /* Slightly brighter accent */
            box-shadow: 0 6px 20px rgba(233, 69, 96, 0.6);
            transform: translateY(-2px);
        }
        .btn-secondary {
            background-color: transparent;
            color: var(--color-accent);
            border: 2px solid var(--color-accent);
        }
        .btn-secondary:hover {
            background-color: var(--color-accent);
            color: var(--color-white);
            transform: translateY(-2px);
        }
        .btn-small {
            padding: 8px 15px;
            font-size: 0.85em;
        }

        .container {
            max-width: var(--container-max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .section-padding {
            padding: var(--section-padding) 0;
        }
        .text-center {
            text-align: center;
        }
        .section-title {
            margin-bottom: 60px;
            position: relative;
            padding-bottom: 10px;
            display: inline-block;
        }
        .section-title::after {
            content: '';
            position: absolute;
            left: 50%;
            bottom: 0;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background-color: var(--color-accent);
            border-radius: 2px;
        }

        /*
        ---------------------------------------------------------------------
        HEADER & NAVIGATION
        ---------------------------------------------------------------------
        */
        .main-header {
            background-color: rgba(26, 26, 46, 0.95); /* Semi-transparent primary-bg */
            padding: 15px 0;
            position: sticky;
            top: 0;
            width: 100%;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.2);
            backdrop-filter: blur(5px);
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            font-family: var(--font-heading);
            font-size: 2em;
            font-weight: 700;
            color: var(--color-white);
            letter-spacing: 1px;
        }
        .logo span {
            color: var(--color-accent);
        }

        .nav-links {
            list-style: none;
            display: flex;
            gap: 30px;
        }
        .nav-links a {
            color: var(--color-text-light);
            font-weight: 600;
            position: relative;
            padding: 5px 0;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2px;
            background-color: var(--color-accent);
            transition: width var(--transition-speed) ease;
        }
        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 20px;
        }
        .header-actions .icon-btn {
            background: none;
            border: none;
            color: var(--color-text-light);
            font-size: 1.4em;
            cursor: pointer;
            position: relative;
            transition: color var(--transition-speed) ease;
        }
        .header-actions .icon-btn:hover {
            color: var(--color-accent);
        }
        .cart-count {
            position: absolute;
            top: -8px;
            right: -8px;
            background-color: var(--color-accent);
            color: var(--color-white);
            font-size: 0.75em;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            display: flex;
            justify-content: center;
            align-items: center;
            font-weight: 600;
            line-height: 1;
        }

        .menu-toggle {
            display: none; /* Hidden on desktop */
            background: none;
            border: none;
            font-size: 1.8em;
            color: var(--color-text-light);
            cursor: pointer;
            z-index: 1001;
        }

        /*
        ---------------------------------------------------------------------
        HERO SECTION
        ---------------------------------------------------------------------
        */
        .hero-section {
            background: linear-gradient(rgba(26, 26, 46, 0.8), rgba(26, 26, 46, 0.8)), url('https://placehold.co/1920x800/1a1a2e/e94560/webp?text=DIGITAL+FREEDOM'); /* Placeholder background image */
            background-size: cover;
            background-position: center;
            height: 70vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 0 20px;
        }
        .hero-content {
            max-width: 800px;
            animation: fadeInSlideUp 1s ease-out forwards;
        }
        .hero-content h1 {
            font-size: 4em;
            margin-bottom: 20px;
            line-height: 1.1;
            text-shadow: 0 5px 15px rgba(0,0,0,0.4);
        }
        .hero-content p {
            font-size: 1.3em;
            color: var(--color-text-dark);
            margin-bottom: 40px;
        }
        .hero-content .btn {
            margin: 0 10px;
        }

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

        /*
        ---------------------------------------------------------------------
        GRID BUTTONS SECTION
        ---------------------------------------------------------------------
        */
        .grid-buttons-section {
            background-color: var(--color-secondary-bg);
            padding: var(--section-padding) 0;
            border-bottom: 1px solid rgba(255,255,255,0.05);
        }
        .grid-buttons-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 20px;
            justify-content: center;
            align-items: center;
        }
        .grid-button {
            background-color: var(--color-primary-bg);
            color: var(--color-text-light);
            border: 1px solid rgba(255,255,255,0.1);
            padding: 20px;
            border-radius: var(--border-radius-soft);
            font-family: var(--font-heading);
            font-weight: 600;
            font-size: 1.1em;
            text-align: center;
            text-transform: uppercase;
            cursor: pointer;
            transition: all var(--transition-speed) ease;
            box-shadow: 0 5px 15px rgba(0,0,0,0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: 80px; /* Ensure consistent height */
        }
        .grid-button:hover {
            background-color: var(--color-accent);
            color: var(--color-white);
            border-color: var(--color-accent);
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(233, 69, 96, 0.4);
        }

        /*
        ---------------------------------------------------------------------
        ADVERTISEMENT SECTION
        ---------------------------------------------------------------------
        */
        .advertisement-section {
            background: linear-gradient(45deg, var(--color-secondary-bg) 0%, #0d1326 100%);
            padding: var(--section-padding) 0;
            text-align: center;
            position: relative;
            overflow: hidden;
            border-top: 1px solid rgba(255,255,255,0.05);
            border-bottom: 1px solid rgba(255,255,255,0.05);
        }

        .advertisement-section::before,
        .advertisement-section::after {
            content: '';
            position: absolute;
            background: rgba(233, 69, 96, 0.1);
            border-radius: 50%;
            filter: blur(50px);
            opacity: 0.6;
            animation: pulseBg 4s infinite alternate;
            z-index: 0;
        }

        .advertisement-section::before {
            width: 300px;
            height: 300px;
            top: -50px;
            left: -50px;
        }

        .advertisement-section::after {
            width: 400px;
            height: 400px;
            bottom: -80px;
            right: -80px;
            animation-delay: 1s;
        }

        @keyframes pulseBg {
            from { transform: scale(0.9); opacity: 0.6; }
            to { transform: scale(1.1); opacity: 0.8; }
        }

        .advertisement-content {
            position: relative;
            z-index: 1;
            max-width: 900px;
            margin: 0 auto;
            opacity: 0;
            transform: translateY(20px);
            animation: fadeInSlideUp 1s forwards 0.5s; /* Delay animation */
        }
        .advertisement-content h2 {
            font-size: 3.5em;
            color: var(--color-white);
            margin-bottom: 25px;
            text-shadow: 0 5px 15px rgba(0,0,0,0.5);
        }
        .advertisement-content p {
            font-size: 1.2em;
            color: var(--color-text-dark);
            margin-bottom: 40px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }
        .advertisement-content .btn {
            font-size: 1.1em;
            padding: 15px 40px;
        }


        /*
        ---------------------------------------------------------------------
        PRODUCT LISTING
        ---------------------------------------------------------------------
        */
        .product-section {
            background-color: var(--color-primary-bg);
            padding: var(--section-padding) 0;
        }
        .filter-bar {
            text-align: center;
            margin-bottom: 50px;
        }
        .filter-bar .filter-btn {
            background-color: var(--color-secondary-bg);
            color: var(--color-text-light);
            border: 1px solid rgba(255,255,255,0.1);
            padding: 10px 25px;
            margin: 0 10px;
            border-radius: var(--border-radius-soft);
            cursor: pointer;
            transition: all var(--transition-speed) ease;
            font-weight: 600;
        }
        .filter-bar .filter-btn:hover {
            background-color: var(--color-accent);
            color: var(--color-white);
            border-color: var(--color-accent);
        }
        .filter-bar .filter-btn.active {
            background-color: var(--color-accent);
            color: var(--color-white);
            border-color: var(--color-accent);
            box-shadow: 0 2px 10px rgba(233, 69, 96, 0.4);
        }

        .product-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 40px;
        }
        .product-card {
            background-color: var(--color-secondary-bg);
            border-radius: var(--border-radius-soft);
            overflow: hidden;
            box-shadow: 0 8px 25px rgba(0,0,0,0.3);
            transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .product-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 40px rgba(0,0,0,0.4);
        }
        .product-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
            transition: transform 0.5s ease;
        }
        .product-card:hover img {
            transform: scale(1.05);
        }
        .product-content {
            padding: 20px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        .product-content h3 {
            font-size: 1.4em;
            margin-bottom: 10px;
            color: var(--color-white);
        }
        .product-content p {
            font-size: 0.95em;
            color: var(--color-text-dark);
            margin-bottom: 15px;
            flex-grow: 1;
        }
        .product-price {
            font-size: 1.5em;
            font-weight: 700;
            color: var(--color-accent);
            margin-bottom: 15px;
        }
        .product-actions {
            display: flex;
            justify-content: center;
            padding: 0 20px 20px;
        }
        .product-actions .btn {
            width: 100%;
        }

        /*
        ---------------------------------------------------------------------
        FULLWIDTH PRODUCT SLIDER
        ---------------------------------------------------------------------
        */
        .product-slider-section {
            background-color: var(--color-secondary-bg);
            padding: var(--section-padding) 0;
            position: relative;
            overflow: hidden; /* Important for the slider functionality */
        }
        .product-slider-wrapper {
            position: relative;
            overflow: hidden;
            padding: 0 50px; /* Space for buttons */
        }
        .product-slider-track {
            display: flex;
            width: max-content; /* Allow content to dictate width */
            transition: transform 0.8s ease-in-out; /* Smooth slide animation */
            will-change: transform;
            /* No scroll-snap here, managed by JS */
        }
        .slider-item {
            flex-shrink: 0; /* Prevent items from shrinking */
            width: 250px; /* Base width for each slide item */
            margin: 0 15px; /* Spacing between items */
            background-color: var(--color-primary-bg);
            border-radius: var(--border-radius-soft);
            overflow: hidden;
            box-shadow: 0 5px 20px rgba(0,0,0,0.4);
            text-align: center;
            padding-bottom: 15px;
            transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
            cursor: pointer;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .slider-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(0,0,0,0.5);
        }
        .slider-item img {
            width: 100%;
            height: 150px;
            object-fit: cover;
            display: block;
            margin-bottom: 15px;
        }
        .slider-item h4 {
            font-size: 1.1em;
            color: var(--color-white);
            margin: 0 10px 10px;
        }
        .slider-item .price {
            font-size: 1.3em;
            font-weight: 700;
            color: var(--color-accent);
            margin: 0 10px;
        }
        .slider-nav-btn {
            position: absolute;
            top: 50%;
            transform: translateY(-50%);
            background-color: rgba(26, 26, 46, 0.7);
            color: var(--color-white);
            border: none;
            padding: 15px 20px;
            cursor: pointer;
            font-size: 1.5em;
            border-radius: var(--border-radius-soft);
            transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
            z-index: 10;
        }
        .slider-nav-btn:hover {
            background-color: var(--color-accent);
            color: var(--color-white);
        }
        .slider-nav-btn.prev {
            left: 0;
            border-top-left-radius: 0;
            border-bottom-left-radius: 0;
        }
        .slider-nav-btn.next {
            right: 0;
            border-top-right-radius: 0;
            border-bottom-right-radius: 0;
        }


        /*
        ---------------------------------------------------------------------
        SHOPPING CART MODAL
        ---------------------------------------------------------------------
        */
        .cart-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0,0,0,0.7);
            z-index: 2000;
            opacity: 0;
            visibility: hidden;
            transition: opacity var(--transition-speed) ease, visibility var(--transition-speed) ease;
        }
        .cart-overlay.active {
            opacity: 1;
            visibility: visible;
        }
        .cart-modal {
            background-color: var(--color-secondary-bg);
            position: fixed;
            top: 0;
            right: -450px; /* Start off-screen */
            width: 420px;
            height: 100%;
            padding: 30px;
            box-shadow: -5px 0 30px rgba(0,0,0,0.5);
            transition: transform var(--transition-speed) ease-out;
            z-index: 5001;
            display: flex;
            flex-direction: column;
        }
        .cart-overlay.active .cart-modal {
            transform: translateX(-450px); /* Slide in */
        }

        .cart-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 30px;
            padding-bottom: 15px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .cart-header h2 {
            margin: 0;
            font-size: 2em;
        }
        .cart-close {
            background: none;
            border: none;
            color: var(--color-text-light);
            font-size: 2em;
            cursor: pointer;
            transition: color var(--transition-speed) ease;
        }
        .cart-close:hover {
            color: var(--color-accent);
        }

        .cart-items {
            flex-grow: 1;
            overflow-y: auto;
            margin-bottom: 20px;
            padding-right: 10px; /* For scrollbar */
        }
        .cart-item {
            display: flex;
            align-items: center;
            margin-bottom: 20px;
            background-color: var(--color-primary-bg);
            padding: 15px;
            border-radius: var(--border-radius-soft);
            box-shadow: 0 2px 10px rgba(0,0,0,0.2);
        }
        .cart-item-img {
            width: 80px;
            height: 80px;
            object-fit: cover;
            border-radius: var(--border-radius-soft);
            margin-right: 15px;
        }
        .cart-item-details {
            flex-grow: 1;
        }
        .cart-item-details h4 {
            margin: 0 0 5px 0;
            font-size: 1.1em;
            color: var(--color-white);
        }
        .cart-item-details .price {
            color: var(--color-accent);
            font-weight: 600;
            margin-bottom: 10px;
        }
        .cart-item-details .quantity-controls {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .quantity-controls button {
            background-color: var(--color-accent);
            color: var(--color-white);
            border: none;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            font-size: 1.1em;
            cursor: pointer;
            transition: background-color var(--transition-speed) ease;
        }
        .quantity-controls button:hover {
            background-color: #ff5779;
        }
        .quantity-controls span {
            font-weight: 600;
            color: var(--color-text-light);
        }
        .cart-item .remove-item-btn {
            background: none;
            border: none;
            color: var(--color-text-dark);
            font-size: 1.2em;
            cursor: pointer;
            margin-left: 15px;
            transition: color var(--transition-speed) ease;
        }
        .cart-item .remove-item-btn:hover {
            color: var(--color-accent);
        }

        .cart-summary {
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.1);
        }
        .cart-summary .total {
            display: flex;
            justify-content: space-between;
            font-size: 1.5em;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 20px;
        }
        .cart-summary .btn-checkout {
            width: 100%;
        }
        #empty-cart-message {
            text-align: center;
            color: var(--color-text-dark);
            font-size: 1.1em;
            margin-top: 50px;
        }

        /*
        ---------------------------------------------------------------------
        CHECKOUT MODAL
        ---------------------------------------------------------------------
        */
        .checkout-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0,0,0,0.8);
            z-index: 2500;
            display: flex;
            justify-content: center;
            align-items: center;
            opacity: 0;
            visibility: hidden;
            transition: opacity var(--transition-speed) ease, visibility var(--transition-speed) ease;
        }
        .checkout-overlay.active {
            opacity: 1;
            visibility: visible;
        }
        .checkout-modal {
            background-color: var(--color-secondary-bg);
            padding: 40px;
            border-radius: var(--border-radius-soft);
            box-shadow: 0 10px 40px rgba(0,0,0,0.5);
            width: 100%;
            max-width: 600px;
			overflow-y: auto;
            transform: translateY(20px);
            opacity: 0;
            transition: transform var(--transition-speed) ease, opacity var(--transition-speed) ease;
        }
        .checkout-overlay.active .checkout-modal {
            transform: translateY(0);
            opacity: 1;
        }

        .checkout-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 30px;
            padding-bottom: 15px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .checkout-header h2 {
            margin: 0;
            font-size: 2.2em;
        }
        .checkout-close {
            background: none;
            border: none;
            color: var(--color-text-light);
            font-size: 2em;
            cursor: pointer;
            transition: color var(--transition-speed) ease;
        }
        .checkout-close:hover {
            color: var(--color-accent);
        }

        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            color: var(--color-text-light);
            font-weight: 600;
        }
        .form-group input {
            width: 100%;
            padding: 12px;
            border: 1px solid rgba(255,255,255,0.2);
            border-radius: var(--border-radius-soft);
            background-color: var(--color-primary-bg);
            color: var(--color-text-light);
            font-family: var(--font-body);
            font-size: 1em;
            transition: border-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
        }
        .form-group input:focus {
            outline: none;
            border-color: var(--color-accent);
            box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.2);
        }
        .form-group.invalid input {
            border-color: #e74c3c;
        }
        .error-message {
            color: #e74c3c;
            font-size: 0.9em;
            margin-top: 5px;
            display: block;
        }

        .checkout-summary-final {
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.1);
        }
        .checkout-summary-final p {
            display: flex;
            justify-content: space-between;
            font-size: 1.2em;
            color: var(--color-text-light);
            margin-bottom: 10px;
        }
        .checkout-summary-final .total {
            font-size: 1.8em;
            font-weight: 700;
            color: var(--color-accent);
            margin-top: 15px;
        }
        .checkout-process-message {
            margin-top: 20px;
            padding: 15px;
            background-color: rgba(233, 69, 96, 0.1);
            border: 1px solid var(--color-accent);
            border-radius: var(--border-radius-soft);
            color: var(--color-text-light);
            text-align: center;
            display: none;
        }
        .checkout-process-message.success {
            background-color: rgba(46, 204, 113, 0.1); /* Green tint */
            border-color: #2ecc71;
            color: #2ecc71;
        }
        .checkout-process-message.error {
            background-color: rgba(231, 76, 60, 0.1); /* Red tint */
            border-color: #e74c3c;
            color: #e74c3c;
        }


        /*
        ---------------------------------------------------------------------
        FOOTER
        ---------------------------------------------------------------------
        */
        .main-footer {
            background-color: var(--color-secondary-bg);
            padding: 60px 0 30px;
            color: var(--color-text-dark);
            text-align: center;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            text-align: left;
            margin-bottom: 40px;
        }
        .footer-col h4 {
            font-size: 1.3em;
            color: var(--color-white);
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-col h4::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 50px;
            height: 2px;
            background-color: var(--color-accent);
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: var(--color-text-dark);
            transition: color var(--transition-speed) ease;
        }
        .footer-col ul li a:hover {
            color: var(--color-accent);
        }
        .social-links {
            margin-top: 20px;
        }
        .social-links a {
            display: inline-block;
            width: 40px;
            height: 40px;
            line-height: 40px;
            text-align: center;
            background-color: rgba(255,255,255,0.05);
            color: var(--color-white);
            border-radius: 50%;
            margin-right: 10px;
            transition: all var(--transition-speed) ease;
        }
        .social-links a:hover {
            background-color: var(--color-accent);
            transform: translateY(-3px);
        }
        .footer-bottom {
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.9em;
            color: var(--color-text-dark);
        }
        .footer-bottom p {
            margin: 0;
        }

        /*
        ---------------------------------------------------------------------
        RESPONSIVE DESIGN (Media Queries)
        ---------------------------------------------------------------------
        */
        @media (max-width: 992px) {
            h1 { font-size: 3em; }
            h2 { font-size: 2em; }
            .hero-content h1 { font-size: 3.2em; }
            .hero-content p { font-size: 1.1em; }

            .advertisement-content h2 { font-size: 2.8em; }
            .advertisement-content p { font-size: 1.1em; }
            .advertisement-content .btn { font-size: 1em; padding: 12px 30px;}

            .grid-buttons-container {
                grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            }
            .grid-button {
                font-size: 1em;
                padding: 15px;
            }

            .nav-links {
                gap: 20px;
            }

            .product-grid {
                grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
                gap: 30px;
            }

            .slider-item {
                width: 220px;
                margin: 0 10px;
            }

            .cart-modal {
                width: 350px;
            }
            .cart-overlay.active .cart-modal {
                transform: translateX(-350px);
            }
        }

        @media (max-width: 768px) {
            .main-header .nav-links {
                position: fixed;
                top: 0;
                right: -280px; /* Hidden off-screen */
                width: 280px;
                height: 100vh;
                background-color: var(--color-primary-bg);
                box-shadow: -5px 0 15px rgba(0,0,0,0.5);
                flex-direction: column;
                padding: 80px 20px 20px;
                overflow-y: auto;
                transition: transform 0.3s ease-out;
                z-index: 999;
            }
            .main-header .nav-links.active {
                transform: translateX(-280px); /* Slide in */
            }
            .main-header .nav-links li {
                margin: 15px 0;
                text-align: center;
            }
            .main-header .nav-links li a {
                font-size: 1.1em;
                display: block;
                padding: 10px 0;
            }
            .main-header .nav-links li a::after {
                width: 60%;
                left: 20%;
                transform: none;
            }

            .menu-toggle {
                display: block; /* Show hamburger icon */
            }

            .hero-content h1 { font-size: 2.5em; }
            .hero-content p { font-size: 1em; }
            .hero-content .btn {
                display: block;
                width: 80%;
                margin: 15px auto;
            }

            .advertisement-content h2 { font-size: 2.2em; }
            .advertisement-content p { font-size: 1em; }
            .advertisement-content .btn { font-size: 0.9em; padding: 10px 25px;}

            .grid-buttons-container {
                grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
            }
            .grid-button {
                font-size: 0.95em;
                padding: 15px 10px;
            }

            .filter-bar .filter-btn {
                display: block;
                width: calc(100% - 20px);
                margin: 10px auto;
            }

            .product-grid {
                grid-template-columns: 1fr; /* Single column on small screens */
                gap: 30px;
            }

            .product-slider-wrapper {
                padding: 0 15px; /* Less space for buttons, or hide them and rely on swipe */
            }
            .slider-nav-btn {
                padding: 10px 15px;
                font-size: 1.2em;
            }
            .slider-item {
                width: 200px; /* Adjust item width for smaller screens */
                margin: 0 8px;
            }

            .cart-modal {
                width: 100%; /* Full width on mobile */
                right: -100%;
            }
            .cart-overlay.active .cart-modal {
                transform: translateX(-100%);
            }

            .checkout-modal {
                max-width: 90%;
                padding: 25px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                text-align: center;
            }
            .footer-col h4::after {
                left: 50%;
                transform: translateX(-50%);
            }
            .social-links {
                justify-content: center;
                display: flex; /* For horizontal centering */
            }
        }

        @media (max-width: 480px) {
            h1 { font-size: 2.2em; }
            h2 { font-size: 1.8em; }
            .hero-section {
                height: 60vh;
            }
            .hero-content h1 { font-size: 2em; }
            .hero-content p { font-size: 0.9em; }

            .advertisement-content h2 { font-size: 1.8em; }
            .advertisement-content p { font-size: 0.9em; }
            .advertisement-content .btn { font-size: 0.8em; padding: 8px 20px;}

            .grid-buttons-container {
                grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
            }
            .grid-button {
                font-size: 0.85em;
                padding: 12px 8px;
                min-height: 70px;
            }

            .header-content {
                padding: 0 15px;
            }
            .logo {
                font-size: 1.6em;
            }
            .header-actions .icon-btn {
                font-size: 1.2em;
            }

            .section-padding {
                padding: 60px 0;
            }

            .cart-item {
                flex-wrap: wrap;
                text-align: center;
                justify-content: center;
            }
            .cart-item-img {
                margin: 0 auto 10px;
            }
            .cart-item-details {
                text-align: center;
                width: 100%;
            }
            .cart-item .remove-item-btn {
                margin-left: 0;
                margin-top: 10px;
                width: 100%;
            }
        }