@font-face { font-family: 'Inter-fallback'; size-adjust: 107.2%; ascent-override: 90%; descent-override: 22%; line-gap-override: 0%; src: local('Arial'); }

        :root {
            --primary: #6366f1;
            --primary-dark: #4f46e5;
            --primary-light: #818cf8;
            --secondary: #06b6d4;
            --accent: #8b5cf6;
            --success: #10b981;
            --warning: #f59e0b;
            --error: #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;
            --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
            --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
            --radius-sm: 0.375rem;
            --radius: 0.5rem;
            --radius-md: 0.5rem;
            --radius-lg: 0.75rem;
            --radius-xl: 1rem;
            --radius-2xl: 1.5rem;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Inter', 'Inter-fallback', sans-serif;
            line-height: 1.6;
            color: var(--gray-800);
            background-color: var(--gray-50);
        }

        /* Header */
        .header {
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 100;
            -webkit-backdrop-filter: blur(10px);
            backdrop-filter: blur(10px);
        }

        .header-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            color: var(--white);
            text-decoration: none;
            font-weight: 700;
            font-size: 1.5rem;
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            background: var(--white);
            border-radius: var(--radius-lg);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
        }

        .nav-desktop {
            display: flex;
            gap: 2rem;
        }

        .nav-link {
            color: rgba(255, 255, 255, 0.9);
            text-decoration: none;
            font-weight: 500;
            transition: color 0.2s;
        }

        .nav-link:hover {
            color: var(--white);
        }

        .hamburger-btn {
            display: none;
            flex-direction: column;
            gap: 6px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
        }

        .hamburger-btn span {
            width: 24px;
            height: 2px;
            background-color: white;
            border-radius: 2px;
            transition: all 0.3s;
        }

        .nav-mobile {
            display: none;
            flex-direction: column;
            background: rgba(99, 102, 241, 0.95);
            backdrop-filter: blur(20px);
            position: fixed;
            top: 0;
            right: 0;
            width: 80%;
            max-width: 320px;
            height: 100vh;
            padding: 4rem 1.5rem 2rem;
            transform: translateX(100%);
            transition: transform 0.3s ease-out;
            z-index: 1000;
            overflow-y: auto;
        }

        .nav-mobile.active {
            display: flex;
            transform: translateX(0);
        }

        .nav-mobile .nav-link {
            padding: 1rem;
            border-radius: var(--radius-md);
            margin-bottom: 0.5rem;
            font-size: 1.1rem;
            font-weight: 500;
        }

        .nav-mobile .nav-link:hover {
            background-color: rgba(255, 255, 255, 0.15);
        }

        /* Hero Section */
        .hero {
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            padding: clamp(3rem, 8vw, 4rem) clamp(1rem, 3vw, 1.5rem) clamp(4rem, 10vw, 6rem);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
        }

        .hero-content {
            position: relative;
            z-index: 1;
            max-width: 800px;
            margin: 0 auto;
        }

        .hero h1 {
            font-size: clamp(2rem, 5vw, 3.5rem);
            font-weight: 700;
            color: var(--white);
            margin-bottom: 1rem;
            line-height: 1.2;
        }

        .hero-subtitle {
            font-size: clamp(1rem, 2.5vw, 1.25rem);
            color: rgba(255, 255, 255, 0.9);
            max-width: 600px;
            margin: 0 auto 2rem;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(255, 255, 255, 0.2);
            -webkit-backdrop-filter: blur(10px);
            backdrop-filter: blur(10px);
            padding: 0.5rem 1rem;
            border-radius: 9999px;
            color: var(--white);
            font-weight: 600;
            font-size: 0.875rem;
        }

        /* Features Bar */
        .features-bar {
            background: var(--white);
            padding: clamp(1rem, 3vw, 1.5rem);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-xl);
            max-width: 900px;
            margin: clamp(-2rem, -5vw, -3rem) auto 0;
            position: relative;
            z-index: 10;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
            gap: clamp(1rem, 3vw, 1.5rem);
        }

        .feature-item {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .feature-icon {
            width: clamp(40px, 10vw, 48px);
            height: clamp(40px, 10vw, 48px);
            border-radius: var(--radius-lg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: clamp(1.25rem, 3vw, 1.5rem);
        }

        .feature-icon.free {
            background: linear-gradient(135deg, #10b981 0%, #059669 100%);
            color: var(--white);
        }

        .feature-icon.nowatermark {
            background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
            color: var(--white);
        }

        .feature-icon.fast {
            background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
            color: var(--white);
        }

        .feature-icon.privacy {
            background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
            color: var(--white);
        }

        .feature-text h3 {
            font-size: clamp(0.875rem, 2.5vw, 1rem);
            font-weight: 600;
            color: var(--gray-800);
        }

        .feature-text p {
            font-size: clamp(0.75rem, 2vw, 0.875rem);
            color: var(--gray-500);
        }

        /* Tool Section */
        .tool-section {
            padding: 4rem 1.5rem;
            max-width: 1200px;
            margin: 0 auto;
        }

        .section-title {
            text-align: center;
            margin-bottom: 2rem;
        }

        .section-title h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--gray-800);
            margin-bottom: 0.5rem;
        }

        .section-title p {
            color: var(--gray-500);
        }

        /* Upload Area */
        .upload-container {
            background: var(--white);
            border-radius: var(--radius-2xl);
            box-shadow: var(--shadow-lg);
            padding: 2rem;
            margin-bottom: 2rem;
        }

        .upload-area {
            border: 3px dashed var(--gray-300);
            border-radius: var(--radius-xl);
            padding: 3rem 2rem;
            text-align: center;
            transition: all 0.3s ease;
            cursor: pointer;
            background: var(--gray-50);
        }

        .upload-area:hover {
            border-color: var(--primary);
            background: rgba(99, 102, 241, 0.05);
        }

        .upload-area.drag-over {
            border-color: var(--primary);
            background: rgba(99, 102, 241, 0.1);
            transform: scale(1.02);
        }

        .upload-area.has-file {
            border-style: solid;
            border-color: var(--success);
            background: rgba(16, 185, 129, 0.05);
        }

        .upload-icon {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.5rem;
            font-size: 2rem;
            color: var(--white);
            transition: transform 0.3s ease;
        }

        .upload-area:hover .upload-icon {
            transform: translateY(-5px);
        }

        .upload-text h3 {
            font-size: 1.5rem;
            font-weight: 600;
            color: var(--gray-800);
            margin-bottom: 0.5rem;
        }

        .upload-text p {
            color: var(--gray-500);
            margin-bottom: 1.5rem;
        }

        .upload-hints {
            display: flex;
            justify-content: center;
            gap: 2rem;
            flex-wrap: wrap;
            font-size: 0.875rem;
            color: var(--gray-500);
        }

        .upload-hint {
            display: flex;
            align-items: center;
            gap: 0.375rem;
        }

        .upload-btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: var(--white);
            padding: 0.875rem 2rem;
            border-radius: var(--radius-lg);
            font-weight: 600;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 4px 14px 0 rgba(99, 102, 241, 0.39);
        }

        .upload-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px 0 rgba(99, 102, 241, 0.5);
        }

        .file-input {
            display: none;
        }

        .file-info {
            display: none;
            align-items: center;
            justify-content: center;
            gap: 1rem;
            margin-top: 1rem;
            padding: 1rem;
            background: var(--white);
            border-radius: var(--radius-lg);
        }

        .file-info.show {
            display: flex;
        }

        .file-preview {
            width: 60px;
            height: 60px;
            object-fit: cover;
            border-radius: var(--radius);
            border: 2px solid var(--gray-200);
        }

        .file-details {
            text-align: left;
        }

        .file-name {
            font-weight: 600;
            color: var(--gray-800);
        }

        .file-size {
            font-size: 0.875rem;
            color: var(--gray-500);
        }

        .remove-file {
            background: var(--gray-100);
            border: none;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            cursor: pointer;
            color: var(--gray-500);
            transition: all 0.2s;
        }

        .remove-file:hover {
            background: var(--error);
            color: var(--white);
        }

        /* Model Loading Section */
        .model-loading-section {
            display: none;
            text-align: center;
            padding: 4rem 2rem;
        }

        .model-loading-section.active {
            display: block;
        }

        .model-loader-icon {
            width: 100px;
            height: 100px;
            margin: 0 auto 1.5rem;
            position: relative;
        }

        .model-loader-icon::before {
            content: '🤖';
            font-size: 4rem;
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            animation: float 2s ease-in-out infinite;
        }

        @keyframes float {
            0%, 100% { transform: translate(-50%, -50%) translateY(0); }
            50% { transform: translate(-50%, -50%) translateY(-10px); }
        }

        .model-loading-text {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--gray-800);
            margin-bottom: 0.5rem;
        }

        .model-loading-subtext {
            color: var(--gray-500);
            margin-bottom: 1.5rem;
        }

        .model-progress-bar {
            width: 100%;
            max-width: 400px;
            height: 12px;
            background: var(--gray-200);
            border-radius: 6px;
            margin: 0 auto;
            overflow: hidden;
        }

        .model-progress-fill {
            height: 100%;
            background: linear-gradient(90deg, var(--primary) 0%, var(--accent) 100%);
            border-radius: 6px;
            transition: width 0.3s ease;
            width: 0%;
        }

        .model-progress-text {
            margin-top: 0.5rem;
            font-size: 0.875rem;
            color: var(--gray-500);
        }

        /* Processing Section */
        .processing-section {
            display: none;
            text-align: center;
            padding: 3rem 2rem;
        }

        .processing-section.active {
            display: block;
        }

        .loading-spinner {
            width: 80px;
            height: 80px;
            margin: 0 auto 1.5rem;
            position: relative;
        }

        .loading-spinner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            border: 4px solid var(--gray-200);
            border-top-color: var(--primary);
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }

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

        .loading-text {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--gray-800);
            margin-bottom: 0.5rem;
        }

        .loading-subtext {
            color: var(--gray-500);
        }

        .progress-bar {
            width: 100%;
            max-width: 400px;
            height: 8px;
            background: var(--gray-200);
            border-radius: 4px;
            margin: 1.5rem auto 0;
            overflow: hidden;
        }

        .progress-fill {
            height: 100%;
            background: linear-gradient(90deg, var(--primary) 0%, var(--accent) 100%);
            border-radius: 4px;
            transition: width 0.3s ease;
            width: 0%;
        }

        /* Result Section */
        .result-section {
            display: none;
            padding: 2rem;
        }

        .result-section.active {
            display: block;
        }

        .result-container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            margin-bottom: 2rem;
        }

        @media (max-width: 768px) {
            .result-container {
                grid-template-columns: 1fr;
            }
        }

        .result-box {
            background: var(--gray-50);
            border-radius: var(--radius-xl);
            padding: 1.5rem;
            position: relative;
        }

        .result-label {
            font-weight: 600;
            color: var(--gray-700);
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .result-image-wrapper {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: 
                linear-gradient(45deg, #e5e7eb 25%, transparent 25%),
                linear-gradient(-45deg, #e5e7eb 25%, transparent 25%),
                linear-gradient(45deg, transparent 75%, #e5e7eb 75%),
                linear-gradient(-45deg, transparent 75%, #e5e7eb 75%);
            background-size: 20px 20px;
            background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
            min-height: 300px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .result-image {
            max-width: 100%;
            max-height: 400px;
            object-fit: contain;
            display: block;
        }

        /* Compare Slider */
        .compare-container {
            background: var(--gray-50);
            border-radius: var(--radius-xl);
            padding: 1.5rem;
            margin-bottom: 2rem;
        }

        .compare-label {
            font-weight: 600;
            color: var(--gray-700);
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .compare-slider-wrapper {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: 
                linear-gradient(45deg, #e5e7eb 25%, transparent 25%),
                linear-gradient(-45deg, #e5e7eb 25%, transparent 25%),
                linear-gradient(45deg, transparent 75%, #e5e7eb 75%),
                linear-gradient(-45deg, transparent 75%, #e5e7eb 75%);
            background-size: 20px 20px;
            background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
            min-height: 350px;
            cursor: ew-resize;
        }

        .compare-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 50%;
            height: 100%;
            overflow: hidden;
            border-right: 3px solid var(--primary);
        }

        .compare-overlay img {
            width: 100%;
            height: 100%;
            object-fit: contain;
            display: block;
        }

        .compare-base {
            width: 100%;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .compare-base img {
            max-width: 100%;
            max-height: 350px;
            object-fit: contain;
        }

        .compare-handle {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 50px;
            height: 50px;
            background: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--white);
            font-size: 1.2rem;
            box-shadow: var(--shadow-lg);
            z-index: 10;
            cursor: ew-resize;
        }

        .compare-labels {
            display: flex;
            justify-content: space-between;
            margin-top: 1rem;
            font-size: 0.875rem;
            color: var(--gray-600);
        }

        /* Background Color Picker */
        .bg-color-section {
            background: var(--white);
            border-radius: var(--radius-xl);
            padding: 1.5rem;
            margin-bottom: 2rem;
            box-shadow: var(--shadow);
        }

        .bg-color-title {
            font-weight: 600;
            color: var(--gray-700);
            margin-bottom: 1rem;
        }

        .bg-color-options {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
        }

        .bg-color-btn {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-lg);
            border: 3px solid transparent;
            cursor: pointer;
            transition: all 0.2s;
            position: relative;
        }

        .bg-color-btn:hover {
            transform: scale(1.1);
            border-color: var(--gray-300);
        }

        .bg-color-btn.active {
            border-color: var(--primary);
            box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
        }

        .bg-color-btn.transparent {
            background: 
                linear-gradient(45deg, #e5e7eb 25%, transparent 25%),
                linear-gradient(-45deg, #e5e7eb 25%, transparent 25%),
                linear-gradient(45deg, transparent 75%, #e5e7eb 75%),
                linear-gradient(-45deg, transparent 75%, #e5e7eb 75%);
            background-size: 12px 12px;
            background-position: 0 0, 0 6px, 6px -6px, -6px 0px;
        }

        .bg-color-btn.white {
            background: #ffffff;
            border-color: var(--gray-300);
        }

        .bg-color-btn.blue {
            background: #438edb;
        }

        .bg-color-btn.red {
            background: #d93030;
        }

        .bg-color-btn.yellow {
            background: #f5c755;
        }

        .bg-color-btn.green {
            background: #43af66;
        }

        .bg-color-btn.purple {
            background: #8b5cf6;
        }

        .bg-color-btn.dark {
            background: #1f2937;
        }

        .bg-color-btn::after {
            content: attr(data-label);
            position: absolute;
            bottom: -24px;
            left: 50%;
            transform: translateX(-50%);
            font-size: 0.625rem;
            color: var(--gray-500);
            white-space: nowrap;
            opacity: 0;
            transition: opacity 0.2s;
        }

        .bg-color-btn:hover::after {
            opacity: 1;
        }

        /* Action Buttons */
        .action-buttons {
            display: flex;
            gap: 1rem;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.875rem 1.5rem;
            border-radius: var(--radius-lg);
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: all 0.3s ease;
            border: none;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: var(--white);
            box-shadow: 0 4px 14px 0 rgba(99, 102, 241, 0.39);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px 0 rgba(99, 102, 241, 0.5);
        }

        .btn-secondary {
            background: var(--white);
            color: var(--gray-700);
            border: 2px solid var(--gray-200);
        }

        .btn-secondary:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .format-select {
            padding: 0.5rem 1rem;
            border: 2px solid var(--gray-200);
            border-radius: var(--radius);
            font-size: 1rem;
            cursor: pointer;
            background: var(--white);
        }

        /* Use Cases Section - with content-visibility for performance */
        .use-cases {
            padding: 4rem 1.5rem;
            background: var(--white);
            content-visibility: auto;
            contain-intrinsic-size: 600px;
        }

        .use-cases-grid {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 2rem;
        }

        .use-case-card {
            background: var(--gray-50);
            border-radius: var(--radius-xl);
            overflow: hidden;
            transition: all 0.3s ease;
            border: 1px solid var(--gray-200);
        }

        .use-case-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-xl);
            border-color: var(--primary-light);
        }

        .use-case-image {
            width: 100%;
            height: 200px;
            object-fit: cover;
            background: linear-gradient(135deg, var(--gray-200) 0%, var(--gray-300) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 4rem;
        }

        .use-case-content {
            padding: 1.5rem;
        }

        .use-case-content h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--gray-800);
            margin-bottom: 0.5rem;
        }

        .use-case-content p {
            color: var(--gray-500);
            font-size: 0.95rem;
        }

        /* SEO Topic Cards */
        .seo-topics {
            padding: 4rem 1.5rem;
            background: var(--gray-50);
        }

        .seo-cards-grid {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 2rem;
        }

        .seo-card {
            background: var(--white);
            border-radius: var(--radius-xl);
            padding: 1.5rem;
            border: 1px solid var(--gray-200);
            transition: all 0.3s ease;
        }

        .seo-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
        }

        .seo-card-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-lg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.75rem;
            margin-bottom: 1rem;
        }

        .seo-card-icon.watermark {
            background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
            color: var(--white);
        }

        .seo-card-icon.signup {
            background: linear-gradient(135deg, #10b981 0%, #059669 100%);
            color: var(--white);
        }

        .seo-card-icon.hd {
            background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
            color: var(--white);
        }

        .seo-card-icon.passport {
            background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
            color: var(--white);
        }

        .seo-card-icon.product {
            background: linear-gradient(135deg, #ec4899 0%, #db2777 100%);
            color: var(--white);
        }

        .seo-card-icon.transparent {
            background: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
            color: var(--white);
        }

        .seo-card h3 {
            font-size: 1.125rem;
            font-weight: 600;
            color: var(--gray-800);
            margin-bottom: 0.5rem;
        }

        .seo-card p {
            color: var(--gray-500);
            font-size: 0.9rem;
            margin-bottom: 1rem;
        }

        .seo-card-link {
            display: inline-flex;
            align-items: center;
            gap: 0.375rem;
            color: var(--primary);
            font-weight: 500;
            text-decoration: none;
            transition: color 0.2s;
        }

        .seo-card-link:hover {
            color: var(--primary-dark);
        }

        /* FAQ Section - with content-visibility for performance */
        .faq-section {
            padding: 4rem 1.5rem;
            max-width: 800px;
            margin: 0 auto;
            content-visibility: auto;
            contain-intrinsic-size: 800px;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .faq-item {
            background: var(--white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--gray-200);
            overflow: hidden;
        }

        .faq-question {
            padding: 1.25rem 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            color: var(--gray-800);
            transition: background 0.2s;
        }

        .faq-question:hover {
            background: var(--gray-50);
        }

        .faq-icon {
            width: 24px;
            height: 24px;
            transition: transform 0.3s ease;
        }

        .faq-item.active .faq-icon {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            pointer-events: none;
        }

        .faq-item.active .faq-answer {
            pointer-events: auto;
        }

        .faq-item.active .faq-answer {
            max-height: 200px;
            padding: 0 1.5rem 1.25rem;
        }

        .faq-answer p {
            color: var(--gray-600);
            line-height: 1.7;
        }

        /* Related Pages Section */
        .related-pages {
            padding: 4rem 1.5rem;
            background: var(--gray-50);
        }

        .related-pages-grid {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 1.5rem;
        }

        .related-page-card {
            background: var(--white);
            border-radius: var(--radius-xl);
            padding: 1.5rem;
            display: flex;
            align-items: flex-start;
            gap: 1rem;
            border: 1px solid var(--gray-200);
            text-decoration: none;
            transition: all 0.3s ease;
        }

        .related-page-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
        }

        .related-page-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-lg);
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            flex-shrink: 0;
        }

        .related-page-content h3 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--gray-800);
            margin-bottom: 0.25rem;
        }

        .related-page-content p {
            font-size: 0.875rem;
            color: var(--gray-500);
            line-height: 1.5;
        }

        /* Footer - with content-visibility for performance */
        .footer {
            background: var(--gray-900);
            color: var(--white);
            padding: 3rem 1.5rem 2rem;
            content-visibility: auto;
            contain-intrinsic-size: 400px;
        }

        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }

        .footer-section h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--white);
        }

        .footer-links {
            list-style: none;
        }

        .footer-links li {
            margin-bottom: 0.5rem;
        }

        .footer-links a {
            color: var(--gray-400);
            text-decoration: none;
            transition: color 0.2s;
        }

        .footer-links a:hover {
            color: var(--white);
        }

        /* Breadcrumb Navigation */
        .breadcrumb { padding: 1rem 1.5rem 0; max-width: 1200px; margin: 0 auto; }
        .breadcrumb-list { display: flex; align-items: center; list-style: none; gap: 0.5rem; flex-wrap: wrap; }
        .breadcrumb-item { display: flex; align-items: center; }
        .breadcrumb-item a { color: var(--gray-500); text-decoration: none; font-size: 0.875rem; transition: color 0.2s; }
        .breadcrumb-item a:hover { color: var(--primary); }
        .breadcrumb-item.active { color: var(--gray-700); font-size: 0.875rem; font-weight: 500; }
        .breadcrumb-separator { color: var(--gray-300); margin: 0 0.25rem; }

        .footer-bottom {
            border-top: 1px solid var(--gray-800);
            padding-top: 2rem;
            text-align: center;
            color: var(--gray-500);
            font-size: 0.875rem;
        }

        /* Toast Notification */
        .toast {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            background: var(--gray-800);
            color: var(--white);
            padding: 1rem 1.5rem;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-xl);
            display: flex;
            align-items: center;
            gap: 0.75rem;
            transform: translateX(150%);
            transition: transform 0.3s ease;
            z-index: 1000;
        }

        .toast.show {
            transform: translateX(0);
        }

        .toast.success {
            background: var(--success);
        }

        .toast.error {
            background: var(--error);
        }

        /* Responsive */
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }

            .hamburger-btn {
                display: flex;
            }

            .hamburger-btn.active span:nth-child(1) {
                transform: rotate(-45deg) translate(-5px, 6px);
            }

            .hamburger-btn.active span:nth-child(2) {
                opacity: 0;
            }

            .hamburger-btn.active span:nth-child(3) {
                transform: rotate(45deg) translate(-5px, -6px);
            }

            .overlay {
                position: fixed;
                top: 0;
                left: 0;
                width: 100%;
                height: 100%;
                background: rgba(0, 0, 0, 0.5);
                z-index: 999;
                opacity: 0;
                visibility: hidden;
                transition: opacity 0.3s ease-out, visibility 0.3s ease-out;
            }

            .overlay.active {
                opacity: 1;
                visibility: visible;
            }

            .features-bar {
                margin: -1.5rem 0.75rem 0;
                padding: 0.75rem;
                grid-template-columns: repeat(2, 1fr);
            }

            .feature-icon {
                width: 40px;
                height: 40px;
                font-size: 1.25rem;
            }

            .feature-text h3 {
                font-size: 0.875rem;
            }

            .feature-text p {
                font-size: 0.75rem;
            }

            .hero h1 {
                font-size: clamp(1.75rem, 4.5vw, 2.5rem);
            }

            .hero-subtitle {
                font-size: clamp(0.9rem, 2vw, 1.1rem);
            }

            .upload-area {
                padding: 1.5rem 0.75rem;
            }

            .upload-text h3 {
                font-size: 1.25rem;
            }

            .upload-icon {
                width: 60px;
                height: 60px;
                font-size: 1.5rem;
            }

            .action-buttons {
                flex-direction: column;
            }

            .btn {
                width: 100%;
                justify-content: center;
            }

            .compare-slider-wrapper {
                min-height: 200px;
            }

            .section-title h2 {
                font-size: 1.5rem;
            }

            .footer {
                padding: 2rem 1rem 1.5rem;
            }

            .footer-grid {
                grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
                gap: 1.5rem;
            }
        }

        @media (min-width: 769px) and (max-width: 1024px) {
            .features-bar {
                grid-template-columns: repeat(4, 1fr);
            }
        }

        /* Animations */
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .animate-fade-in {
            animation: fadeIn 0.6s ease forwards;
        }

        @keyframes pulse {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.5; }
        }

        .animate-pulse {
            animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
        }