/* CSS Reset & Basic Setup */
        :root {
            --indigo-500: #6366f1;
            --indigo-600: #4f46e5;
            --indigo-700: #4338ca;
            --green-500: #22c55e;
            --green-600: #16a34a;
            --red-500: #ef4444;
            --gray-50: #f9fafb;
            --gray-100: #f3f4f6;
            --gray-200: #e5e7eb;
            --gray-300: #d1d5db;
            --gray-400: #9ca3af;
            --gray-500: #6b7280;
            --gray-600: #4b5563;
            --gray-700: #374151;
            --gray-800: #1f2937;
            --gray-900: #111827;
            --white: #ffffff;
            --black: #000000;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', sans-serif;
            background-color: var(--gray-50);
            color: var(--gray-800);
            margin: 0;
            line-height: 1.5;
        }

        @media (prefers-color-scheme: dark) {
            body {
                background-color: var(--gray-900);
                color: var(--gray-200);
            }
        }

        /* Reusable Container */
        .container {
            width: 100%;
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }
        
        /* Header & Navigation */
        header {
            background-color: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(4px);
            position: sticky;
            top: 0;
            z-index: 50;
            box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
        }

        header nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 1rem;
            padding-bottom: 1rem;
        }
        
        header .logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--gray-800);
            display: flex;
            align-items: center;
            gap: 0.5rem;
            text-decoration: none;
        }

        header .logo i {
            color: var(--indigo-500);
        }

        #desktop-nav {
            display: none; /* Hidden by default */
        }
        
        #desktop-nav a {
            color: var(--gray-600);
            text-decoration: none;
            transition: color 0.3s;
        }
        #desktop-nav a:hover, #desktop-nav a.nav-active {
            color: var(--indigo-500);
        }
        .nav-active {
            font-weight: 600;
        }

        #mobile-menu-btn {
            font-size: 1.5rem;
            background: none;
            border: none;
            cursor: pointer;
            color: inherit;
        }
        
        #mobile-menu {
            padding-left: 1.5rem;
            padding-right: 1.5rem;
            padding-bottom: 1rem;
        }

        #mobile-menu a {
            display: block;
            color: var(--gray-600);
            text-decoration: none;
            transition: color 0.3s;
            padding-top: 0.5rem;
            padding-bottom: 0.5rem;
        }
        #mobile-menu a:hover {
            color: var(--indigo-500);
        }
        
        .hidden { display: none !important; }

        @media (min-width: 768px) {
            #desktop-nav {
                display: flex;
                align-items: center;
                gap: 1.5rem;
            }
            #mobile-menu-btn {
                display: none;
            }
        }

        /* Dark Mode Styles */
        @media (prefers-color-scheme: dark) {
            header {
                background-color: rgba(17, 24, 39, 0.8);
            }
            header .logo, #desktop-nav a, #mobile-menu a {
                color: var(--gray-300);
            }
            header .logo i { color: var(--indigo-500); }
            #desktop-nav a:hover, #desktop-nav a.nav-active, #mobile-menu a:hover {
                color: var(--indigo-500);
            }
        }
        
        /* Buttons */
        .btn {
            font-weight: 700;
            padding: 0.75rem 1.5rem;
            border-radius: 0.5rem;
            border: none;
            cursor: pointer;
            box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
            transition: all 0.3s;
            text-decoration: none;
            display: inline-block;
            text-align: center;
        }

        .btn:hover {
            box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
            transform: scale(1.05);
        }

        .btn-primary {
            background-color: var(--indigo-600);
            color: var(--white);
        }
        .btn-primary:hover {
            background-color: var(--indigo-700);
        }

        .btn-secondary {
            background-color: var(--gray-200);
            color: var(--gray-800);
        }
        .btn-secondary:hover {
            background-color: var(--gray-300);
        }

        @media (prefers-color-scheme: dark) {
             .btn-secondary {
                background-color: var(--gray-700);
                color: var(--white);
            }
            .btn-secondary:hover {
                background-color: var(--gray-600);
            }
        }

        /* Hero Section */
        #home {
            padding-top: 4rem;
            padding-bottom: 4rem;
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        #home .hero-text {
            text-align: center;
            margin-bottom: 2.5rem;
        }

        #home h1 {
            font-size: 2.5rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 1rem;
        }
        #home h1 span { color: var(--indigo-500); }
        
        #home p {
            font-size: 1.125rem;
            color: var(--gray-600);
            margin-bottom: 2rem;
            max-width: 36rem;
            margin-left: auto;
            margin-right: auto;
        }
        
        #home .hero-buttons {
            display: flex;
            justify-content: center;
            gap: 1rem;
        }
        
        #home .hero-image {
            display: flex;
            justify-content: center;
        }

        #home .hero-image img {
            border-radius: 9999px;
            box-shadow: 0 25px 50px -12px rgba(0,0,0,0.25);
            width: 75%;
            max-width: 28rem;
        }

        @media (min-width: 768px) {
            #home {
                flex-direction: row;
                padding-top: 6rem;
                padding-bottom: 6rem;
            }
            #home .hero-text {
                width: 50%;
                text-align: left;
                margin-bottom: 0;
            }
            #home p { margin-left: 0; margin-right: 0; }
            #home .hero-buttons { justify-content: flex-start; }
            #home .hero-image { width: 50%; }
            #home .hero-image img { width: 100%; }
            #home h1 { font-size: 3.75rem; }
        }

        @media (prefers-color-scheme: dark) {
             #home p { color: var(--gray-300); }
        }

        /* Features Section */
        #features {
            padding: 5rem 0;
            background-color: var(--white);
        }
        .section-header {
            text-align: center;
            margin-bottom: 3rem;
        }
        .section-header h2 {
            font-size: 2.25rem;
            font-weight: 700;
            margin: 0;
        }
        .section-header p {
            color: var(--gray-600);
            margin-top: 0.5rem;
        }

        .features-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2.5rem;
        }

        .feature-card {
            text-align: center;
            padding: 1.5rem;
            background-color: var(--gray-100);
            border-radius: 0.75rem;
            box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
        }
        .feature-card i {
            font-size: 2.25rem;
            color: var(--indigo-500);
            margin-bottom: 1rem;
        }
        .feature-card h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }
        .feature-card p {
            color: var(--gray-600);
            margin: 0;
        }

        @media (min-width: 768px) {
            .features-grid { grid-template-columns: repeat(3, 1fr); }
        }
        
        @media (prefers-color-scheme: dark) {
            #features { background-color: var(--gray-800); }
            .section-header p { color: var(--gray-400); }
            .feature-card { background-color: rgba(17, 24, 39, 0.5); }
            .feature-card p { color: var(--gray-400); }
        }

        /* Pricing Section */
        #pricing { padding: 5rem 0; text-align: center; }
        
        .pricing-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem;
            max-width: 72rem;
            margin: 0 auto;
        }

        .pricing-card {
            background-color: var(--white);
            border-radius: 1rem;
            box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
            padding: 2rem;
            transition: transform 0.3s;
            position: relative;
        }
        .pricing-card:hover { transform: scale(1.05); }

        .pricing-card h3 { font-size: 1.5rem; font-weight: 700; margin-bottom: 0.5rem; }
        .pricing-card .price { font-size: 3rem; font-weight: 800; color: var(--indigo-500); margin-bottom: 1rem; }
        
        .pricing-card ul {
            list-style: none;
            padding: 0;
            text-align: left;
            margin-bottom: 2rem;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
            color: var(--gray-600);
        }
        .pricing-card ul li { display: flex; align-items: center; gap: 0.75rem; }
        .pricing-card ul .fa-check-circle { color: var(--green-500); }
        .pricing-card ul .fa-times-circle { color: var(--gray-400); }

        .pricing-card.highlight {
            transform: scale(1.05);
            border: 2px solid var(--indigo-500);
        }

        .best-value-badge {
            position: absolute;
            top: 0;
            left: 50%;
            transform: translate(-50%, -50%);
            background-color: var(--indigo-500);
            color: var(--white);
            font-size: 0.875rem;
            font-weight: 700;
            padding: 0.25rem 1rem;
            border-radius: 9999px;
        }

        @media (min-width: 768px) {
             .pricing-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (min-width: 1024px) {
            .pricing-grid { grid-template-columns: repeat(3, 1fr); }
        }
        
        @media (prefers-color-scheme: dark) {
            .pricing-card { background-color: var(--gray-800); }
            .pricing-card ul { color: var(--gray-300); }
        }


        /* Contact Section */
        #contact { padding: 5rem 0; background-color: var(--white); }
        
        #newsletter-form {
            max-width: 36rem;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        #newsletter-form input, #newsletter-form textarea {
            width: 100%;
            background-color: var(--gray-100);
            border: 2px solid transparent;
            border-radius: 0.5rem;
            padding: 0.75rem 1rem;
            color: var(--gray-800);
            transition: border-color 0.3s;
            box-sizing: border-box;
        }
        #newsletter-form input:focus, #newsletter-form textarea:focus {
            border-color: var(--indigo-500);
            outline: none;
        }

        @media (prefers-color-scheme: dark) {
            #contact { background-color: var(--gray-800); }
            #newsletter-form input, #newsletter-form textarea {
                background-color: var(--gray-700);
                color: var(--white);
            }
        }
        
        /* Footer */
        footer {
            background-color: var(--gray-100);
            padding: 2rem 0;
            text-align: center;
            color: var(--gray-600);
        }
        footer .social-links {
            display: flex;
            justify-content: center;
            gap: 1.5rem;
            margin-bottom: 1rem;
        }
        footer .social-links a { color: inherit; text-decoration: none; }
        footer .social-links a:hover { color: var(--indigo-500); }
        
        @media (prefers-color-scheme: dark) {
            footer {
                background-color: rgba(17, 24, 39, 0.5);
                color: var(--gray-400);
            }
        }
        
        /* Modal Styles */
        .modal {
            position: fixed;
            inset: 0;
            z-index: 50;
            background-color: rgba(0,0,0,0.5);
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 1rem;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s ease-in-out;
        }
        .modal-content {
            background-color: var(--white);
            border-radius: 1rem;
            box-shadow: 0 25px 50px -12px rgba(0,0,0,0.25);
            padding: 2rem;
            max-width: 28rem;
            width: 100%;
            transform: scale(0.95);
            transition: transform 0.3s ease-in-out;
        }
        
        .modal-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 1rem;
        }
        .modal-header h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin: 0;
        }
        .close-modal-btn {
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--gray-500);
        }
        .close-modal-btn:hover { color: var(--gray-800); }

        .modal-body p { margin-bottom: 1.5rem; color: var(--gray-600); }

        .modal-summary {
            background-color: var(--gray-100);
            border-radius: 0.5rem;
            padding: 1rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 1.5rem;
        }
        .modal-summary .product-name { font-weight: 700; }
        .modal-summary .product-qty { font-size: 0.875rem; color: var(--gray-500); }
        .modal-summary .product-price { font-weight: 700; font-size: 1.125rem; }
        
        .btn-complete-purchase {
            width: 100%;
            background-color: var(--green-500);
            color: var(--white);
        }
        .btn-complete-purchase:hover {
            background-color: var(--green-600);
        }

        @media (prefers-color-scheme: dark) {
            .modal-content { background-color: var(--gray-800); }
            .close-modal-btn { color: var(--gray-500); }
            .close-modal-btn:hover { color: var(--white); }
            .modal-body p { color: var(--gray-300); }
            .modal-summary { background-color: rgba(55, 65, 81, 0.5); }
            .modal-summary .product-qty { color: var(--gray-400); }
        }

        .modal-input {
            width: 100%;
            background-color: var(--gray-100);
            border: 2px solid var(--gray-200);
            border-radius: 0.5rem;
            padding: 0.75rem 1rem;
            color: var(--gray-800);
            transition: border-color 0.3s;
            box-sizing: border-box;
        }
        .modal-input:focus {
            border-color: var(--indigo-500);
            outline: none;
        }
        .modal-footer-link {
            text-align: center;
            margin-top: 1rem;
            font-size: 0.875rem;
            color: var(--gray-500);
        }
        .modal-footer-link a {
            color: var(--indigo-500);
            text-decoration: none;
            font-weight: 600;
        }
        .modal-footer-link a:hover {
            text-decoration: underline;
        }
        @media (prefers-color-scheme: dark) {
            .modal-input {
                background-color: var(--gray-700);
                border-color: var(--gray-600);
                color: var(--white);
            }
        }

        /* Animation for elements appearing on scroll */
        .reveal {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.6s ease-out, transform 0.6s ease-out;
        }
        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* Profile Icon */
        .profile-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: var(--indigo-600);
            color: var(--white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.875rem;
            cursor: pointer;
            position: relative; /* For dropdown positioning */
        }
        
        /* Profile Dropdown Menu */
        .profile-dropdown {
            position: absolute;
            top: 65px; /* Adjust as needed */
            right: 1.5rem;
            background-color: var(--white);
            border-radius: 0.5rem;
            box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
            width: 220px;
            z-index: 60;
            opacity: 0;
            transform: translateY(-10px);
            pointer-events: none;
            transition: opacity 0.2s ease-out, transform 0.2s ease-out;
        }
        .profile-dropdown.visible {
            opacity: 1;
            transform: translateY(0);
            pointer-events: auto;
        }

        .dropdown-user-info {
            padding: 1rem;
        }
        .dropdown-user-info .user-name {
            font-weight: 600;
            margin: 0;
        }
        .dropdown-user-info .user-email {
            font-size: 0.875rem;
            color: var(--gray-500);
            margin: 0;
        }
        .profile-dropdown hr {
            border: 0;
            height: 1px;
            background-color: var(--gray-200);
            margin: 0;
        }
        #signout-btn {
            display: block;
            padding: 0.75rem 1rem;
            color: var(--red-500);
            text-decoration: none;
            font-weight: 600;
        }
        #signout-btn:hover {
            background-color: var(--gray-100);
        }

        @media (prefers-color-scheme: dark) {
            .profile-dropdown {
                background-color: var(--gray-800);
            }
            .profile-dropdown hr {
                background-color: var(--gray-700);
            }
            #signout-btn:hover {
                background-color: var(--gray-700);
            }
        }