:root {
            --primary: #2563eb;
            --primary-light: #3b82f6;
            --secondary: #1e40af;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --light: #f8fafc;
            --dark: #1e293b;
            --gray: #64748b;
            --gray-light: #e2e8f0;
            --success: #10b981;
            --border-radius: 12px;
            --shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
            --shadow-hover: 0 12px 35px rgba(0, 0, 0, 0.12);
            --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
            --gradient: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
        }

        body {
            background-color: var(--light);
            color: var(--dark);
            line-height: 1.6;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* Header - Updated with Conversion Menus */
        header {
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(10px);
            color: var(--dark);
            padding: 0.8rem 2rem;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
        }

        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1400px;
            margin: 0 auto;
            width: 100%;
        }

        .logo-container {
            display: flex;
            align-items: center;
            gap: 12px;
            text-decoration: none;
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            background: var(--gradient);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.3rem;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
        }

        .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }

        .logo-main {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--dark);
            letter-spacing: -0.5px;
        }

        .logo-sub {
            font-size: 0.75rem;
            font-weight: 500;
            color: var(--gray);
            letter-spacing: 0.5px;
        }

        .logo-domain {
            color: var(--primary);
            font-weight: 700;
        }

        .nav-container {
            display: flex;
            align-items: center;
            gap: 1.5rem;
        }

        .nav-menu {
            display: flex;
            list-style: none;
            gap: 0.8rem;
        }

        .nav-menu > li {
            position: relative;
        }

        .nav-menu a {
            color: var(--dark);
            text-decoration: none;
            font-weight: 600;
            font-size: 0.9rem;
            padding: 0.6rem 1rem;
            border-radius: 10px;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }

        .nav-menu a:hover {
            background-color: rgba(37, 99, 235, 0.08);
            color: var(--primary);
        }

        .nav-menu a.active {
            background-color: rgba(37, 99, 235, 0.12);
            color: var(--primary);
            font-weight: 700;
        }

        /* Dropdown Menus for Conversion Tools - FIXED */
        .dropdown {
            position: relative;
        }

        .dropdown-toggle {
            display: flex;
            align-items: center;
            gap: 6px;
            cursor: pointer;
            position: relative;
        }

        .dropdown-toggle i.fa-chevron-down {
            font-size: 0.8rem;
            transition: var(--transition);
        }

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

        .dropdown-menu {
            position: absolute;
            top: 100%;
            left: 0;
            background: white;
            border-radius: 10px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
            min-width: 220px;
            display: none;
            z-index: 100;
            overflow: hidden;
            border: 1px solid var(--gray-light);
            margin-top: 0.5rem;
            max-height: 400px;
            overflow-y: auto;
        }

        /* Desktop hover behavior */
@media (min-width: 1201px) {
    .dropdown:hover .dropdown-menu {
        display: block;
    }
    
    .dropdown:hover .dropdown-toggle i.fa-chevron-down {
        transform: rotate(180deg);
    }
}

/* Mobile click behavior */
@media (max-width: 1200px) {
    .dropdown.active .dropdown-menu {
        display: block;
    }
}

        .dropdown-menu a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 0.8rem 1.2rem;
            text-decoration: none;
            color: var(--dark);
            transition: var(--transition);
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
            font-size: 0.9rem;
            font-weight: 500;
        }

        .dropdown-menu a:last-child {
            border-bottom: none;
        }

        .dropdown-menu a:hover {
            background-color: rgba(37, 99, 235, 0.08);
            color: var(--primary);
        }

        .dropdown-menu i {
            color: var(--primary);
            width: 20px;
            text-align: center;
        }

        /* Simple Language Link */
        .language-link {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 0.6rem 1rem;
            background: rgba(37, 99, 235, 0.1);
            border-radius: 8px;
            text-decoration: none;
            color: var(--primary);
            font-weight: 600;
            font-size: 0.85rem;
            transition: var(--transition);
            border: 1px solid rgba(37, 99, 235, 0.2);
        }

        .language-link:hover {
            background: rgba(37, 99, 235, 0.2);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.15);
        }

        .mobile-toggle {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
            background: none;
            border: none;
            color: var(--dark);
            padding: 0.5rem;
            z-index: 1001;
        }

        /* Main Container */
        .container {
            max-width: 1400px;
            margin: 2rem auto;
            padding: 0 2rem;
            flex: 1;
            width: 100%;
        }

        /* Hero Section */
        .hero {
            text-align: center;
            margin-bottom: 3rem;
            padding: 3.5rem 2rem;
            border-radius: var(--border-radius);
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, rgba(30, 64, 175, 0.05) 100%);
            position: relative;
            overflow: hidden;
            border: 1px solid rgba(37, 99, 235, 0.1);
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--gradient);
        }

        .hero h1 {
            font-size: 3rem;
            margin-bottom: 1rem;
            color: var(--dark);
            font-weight: 800;
            line-height: 1.2;
        }

        .hero h1 span {
            background: var(--gradient);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .hero p {
            font-size: 1.1rem;
            color: var(--gray);
            max-width: 700px;
            margin: 0 auto 2rem;
        }

        .hero-badges {
            display: flex;
            justify-content: center;
            gap: 1rem;
            flex-wrap: wrap;
            margin-top: 2rem;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(37, 99, 235, 0.1);
            color: var(--primary);
            padding: 0.7rem 1.5rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
        }

        .hero-badge.accent {
            background: rgba(245, 158, 11, 0.1);
            color: var(--accent);
        }

        /* Compressor Wrapper */
        .compressor-wrapper {
            display: grid;
            grid-template-columns: 1.1fr 0.8fr 1.1fr;
            gap: 2rem;
            margin-bottom: 3rem;
        }

        @media (max-width: 1200px) {
            .compressor-wrapper {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
        }

        /* Upload & Result Areas */
        .card {
            background: white;
            border-radius: var(--border-radius);
            padding: 2.5rem;
            box-shadow: var(--shadow);
            display: flex;
            flex-direction: column;
            transition: var(--transition);
            height: 100%;
            border: 1px solid rgba(0, 0, 0, 0.03);
        }

        .card:hover {
            box-shadow: var(--shadow-hover);
        }

        .upload-area {
            border-top: 4px solid var(--primary);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .upload-area::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.03) 0%, rgba(30, 64, 175, 0.03) 100%);
            z-index: 0;
        }

        .upload-area > * {
            position: relative;
            z-index: 1;
        }

        .upload-area.dragover {
            background-color: rgba(37, 99, 235, 0.05);
        }

        .upload-icon {
            font-size: 3.5rem;
            color: var(--primary);
            margin-bottom: 1.5rem;
            background: rgba(37, 99, 235, 0.1);
            width: 90px;
            height: 90px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
        }

        .upload-area h2 {
            font-size: 1.6rem;
            margin-bottom: 0.8rem;
            color: var(--dark);
        }

        .upload-area p {
            color: var(--gray);
            margin-bottom: 1.5rem;
            font-size: 0.95rem;
        }

        .upload-btn {
            background: var(--gradient);
            color: white;
            border: none;
            padding: 1rem 2.5rem;
            border-radius: 10px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            margin: 1rem 0;
            transition: var(--transition);
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.25);
        }

        .upload-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 25px rgba(37, 99, 235, 0.35);
        }

        .file-info {
            margin-top: 1.5rem;
            text-align: center;
            color: var(--gray);
            font-size: 0.9rem;
            padding: 1rem;
            background: var(--gray-light);
            border-radius: 10px;
            width: 100%;
        }

        /* Controls Area */
        .controls-area {
            display: flex;
            flex-direction: column;
            justify-content: center;
            gap: 2rem;
        }

        .control-group {
            background: white;
            padding: 2rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            border: 1px solid rgba(0, 0, 0, 0.03);
        }

        .control-group h3 {
            margin-bottom: 1.5rem;
            color: var(--dark);
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.2rem;
        }

        .control-group h3 i {
            color: var(--primary);
            background: rgba(37, 99, 235, 0.1);
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
        }

        .slider-container {
            margin: 1.5rem 0;
        }

        .slider-label {
            display: flex;
            justify-content: space-between;
            margin-bottom: 0.8rem;
            font-size: 0.95rem;
            font-weight: 500;
        }

        .slider-value {
            color: var(--primary);
            font-weight: 700;
        }

        .slider {
            width: 100%;
            height: 8px;
            -webkit-appearance: none;
            appearance: none;
            background: var(--gray-light);
            border-radius: 4px;
            outline: none;
        }

        .slider::-webkit-slider-thumb {
            -webkit-appearance: none;
            appearance: none;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: white;
            cursor: pointer;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
            border: 3px solid var(--primary);
        }

        .compress-btn {
            background: var(--gradient);
            color: white;
            border: none;
            padding: 1.2rem 3rem;
            border-radius: 10px;
            font-size: 1.1rem;
            font-weight: 700;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            transition: var(--transition);
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.25);
            margin-top: 1rem;
            width: 100%;
        }

        .compress-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 30px rgba(37, 99, 235, 0.35);
        }

        .compress-btn:disabled {
            background: var(--gray);
            cursor: not-allowed;
            transform: none;
            box-shadow: none;
        }

        /* Result Area */
        .result-area {
            border-top: 4px solid var(--success);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            text-align: center;
        }

        .result-image {
            max-width: 100%;
            max-height: 240px;
            border-radius: 12px;
            margin-bottom: 1.5rem;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
            border: 1px solid rgba(0, 0, 0, 0.05);
        }

        .stats {
            display: flex;
            justify-content: space-between;
            width: 100%;
            margin: 1.5rem 0;
            padding: 1.5rem;
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, rgba(30, 64, 175, 0.05) 100%);
            border-radius: 12px;
            border: 1px solid rgba(0, 0, 0, 0.03);
        }

        .stat-item {
            text-align: center;
            flex: 1;
        }

        .stat-value {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 0.3rem;
        }

        .stat-label {
            font-size: 0.85rem;
            color: var(--gray);
            font-weight: 500;
        }

        .download-btn {
            background: var(--success);
            color: white;
            border: none;
            padding: 1rem 2.5rem;
            border-radius: 10px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition);
            box-shadow: 0 6px 20px rgba(16, 185, 129, 0.25);
            margin-top: 0.5rem;
        }

        .download-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 25px rgba(16, 185, 129, 0.35);
            background: #0da271;
        }

        .download-btn:disabled {
            background: var(--gray);
            cursor: not-allowed;
            transform: none;
            box-shadow: none;
        }

        /* Ad Sections */
        .ad-section {
            margin: 2.5rem 0;
            text-align: center;
        }

        .ad-label {
            font-size: 0.85rem;
            color: var(--gray);
            margin-bottom: 0.8rem;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .ad-container {
            background: white;
            border-radius: 12px;
            padding: 2rem;
            box-shadow: var(--shadow);
            min-height: 250px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            color: var(--gray);
            border: 1px dashed rgba(0, 0, 0, 0.08);
            transition: var(--transition);
        }

        .ad-container:hover {
            border-color: var(--primary);
        }

        .ad-container.mobile-ad {
            min-height: 100px;
            padding: 1.5rem;
            margin: 1.5rem auto;
            max-width: 320px;
        }

        .ad-placeholder {
            font-size: 1.2rem;
            margin-bottom: 0.8rem;
            color: var(--primary);
            font-weight: 600;
        }

        /* SEO Content Styles */
        .seo-content {
            max-width: 1200px;
            margin: 3rem auto;
            padding: 0 1.5rem;
            width: 100%;
        }

        .article-content {
            background: white;
            border-radius: var(--border-radius);
            padding: 2.5rem;
            box-shadow: var(--shadow);
            margin-bottom: 2rem;
        }

        .article-content h1 {
            font-size: 2.5rem;
            margin-bottom: 1.5rem;
            color: var(--dark);
            line-height: 1.2;
        }

        .article-content h2 {
            font-size: 1.8rem;
            margin: 2rem 0 1rem;
            color: var(--primary);
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--gray-light);
        }

        .article-content h3 {
            font-size: 1.4rem;
            margin: 1.5rem 0 1rem;
            color: var(--secondary);
        }

        .article-content p {
            margin-bottom: 1.2rem;
            font-size: 1.05rem;
            line-height: 1.7;
        }

        .article-content ul, .article-content ol {
            margin: 1rem 0 1.5rem 2rem;
        }

        .article-content li {
            margin-bottom: 0.8rem;
            line-height: 1.6;
        }

        .article-content .intro {
            font-size: 1.2rem;
            color: var(--dark);
            background: rgba(37, 99, 235, 0.05);
            padding: 1.5rem;
            border-radius: 10px;
            border-left: 4px solid var(--primary);
            margin-bottom: 2rem;
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin: 2rem 0;
            box-shadow: var(--shadow);
            border-radius: 10px;
            overflow: hidden;
        }

        .comparison-table th {
            background: var(--primary);
            color: white;
            padding: 1rem;
            text-align: left;
            font-weight: 600;
        }

        .comparison-table td {
            padding: 1rem;
            border-bottom: 1px solid var(--gray-light);
        }

        .comparison-table tr:nth-child(even) {
            background: rgba(37, 99, 235, 0.03);
        }

        .comparison-table tr:hover {
            background: rgba(37, 99, 235, 0.08);
        }

        .tips-section {
            background: linear-gradient(135deg, rgba(245, 158, 11, 0.05) 0%, rgba(251, 191, 36, 0.05) 100%);
            border-radius: var(--border-radius);
            padding: 2rem;
            margin: 2rem 0;
            border: 1px solid rgba(245, 158, 11, 0.2);
        }

        .tips-section h3 {
            color: var(--accent);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .checklist {
            background: rgba(16, 185, 129, 0.05);
            border-radius: 10px;
            padding: 1.5rem;
            margin: 1.5rem 0;
            border-left: 4px solid var(--success);
        }

        .checklist li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
        }

        .checklist li i {
            color: var(--success);
            margin-top: 0.2rem;
        }

        .faq-section {
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 2px solid var(--gray-light);
        }

        .faq-item {
            margin-bottom: 1.5rem;
            border: 1px solid var(--gray-light);
            border-radius: 10px;
            overflow: hidden;
        }

        .faq-question {
            background: white;
            padding: 1.2rem 1.5rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            transition: var(--transition);
        }

        .faq-question:hover {
            background: rgba(37, 99, 235, 0.05);
        }

        .faq-answer {
            padding: 1.2rem 1.5rem;
            background: var(--light);
            border-top: 1px solid var(--gray-light);
            display: none;
        }

        .faq-item.active .faq-answer {
            display: block;
        }

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

        .keyword-badge {
            display: inline-block;
            background: rgba(37, 99, 235, 0.1);
            color: var(--primary);
            padding: 0.3rem 0.8rem;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            margin: 0.2rem;
        }

        /* Mobile Responsiveness */
        @media (max-width: 1200px) {
            .header-container {
                position: relative;
            }

            .nav-container {
                position: fixed;
                top: 0;
                right: -100%;
                width: 320px;
                height: 100vh;
                background: white;
                flex-direction: column;
                padding: 5rem 2rem 2rem;
                box-shadow: -10px 0 40px rgba(0, 0, 0, 0.1);
                z-index: 1000;
                transition: var(--transition);
                overflow-y: auto;
                gap: 1rem;
            }

            .nav-container.active {
                right: 0;
            }

            .nav-menu {
                flex-direction: column;
                width: 100%;
                gap: 0.5rem;
            }

            .nav-menu > li {
                width: 100%;
            }

            .nav-menu a {
                padding: 1rem 1.5rem;
                border-radius: 10px;
                justify-content: flex-start;
                font-size: 1rem;
                width: 100%;
            }

            .language-link {
                width: 100%;
                justify-content: center;
                margin-top: 1rem;
            }

            .dropdown-menu {
                position: static;
                margin-top: 0.5rem;
                box-shadow: none;
                border: 1px solid var(--gray-light);
                display: none;
                width: 100%;
            }

            .dropdown.active .dropdown-menu {
                display: block;
            }

            .dropdown-toggle {
                width: 100%;
                justify-content: space-between;
            }

            .mobile-toggle {
                display: block;
            }

            .hero {
                padding: 2.5rem 1.5rem;
            }

            .hero h1 {
                font-size: 2.2rem;
            }

            .hero p {
                font-size: 1rem;
            }

            .card {
                padding: 2rem;
            }

            .compressor-wrapper {
                gap: 1.5rem;
            }

            .controls-area {
                order: 3;
                grid-column: 1;
            }

            .ad-container.desktop-ad {
                display: none;
            }

            .menu-overlay {
                display: none;
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                bottom: 0;
                background: rgba(0, 0, 0, 0.5);
                z-index: 999;
                backdrop-filter: blur(3px);
            }

            .menu-overlay.active {
                display: block;
            }
        }

        @media (min-width: 1201px) {
            .ad-container.mobile-ad {
                display: none;
            }
        }

        @media (max-width: 768px) {
            .article-content {
                padding: 1.5rem;
            }
            
            .article-content h1 {
                font-size: 2rem;
            }
            
            .article-content h2 {
                font-size: 1.5rem;
            }
            
            .comparison-table {
                display: block;
                overflow-x: auto;
            }
            
            .seo-content {
                padding: 0 1rem;
            }
        }

        /* Loading Animation */
        .loading {
            display: none;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            margin: 2rem 0;
        }

        .loading.active {
            display: flex;
        }

        .spinner {
            width: 50px;
            height: 50px;
            border: 4px solid rgba(37, 99, 235, 0.1);
            border-top-color: var(--primary);
            border-radius: 50%;
            animation: spin 1s linear infinite;
            margin-bottom: 1rem;
        }

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

        /* Toast Notification */
        .toast {
            position: fixed;
            bottom: 25px;
            right: 25px;
            background: white;
            color: var(--dark);
            padding: 1rem 1.5rem;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
            display: flex;
            align-items: center;
            gap: 12px;
            z-index: 1001;
            transform: translateY(100px);
            opacity: 0;
            transition: var(--transition);
            max-width: 350px;
            border-left: 4px solid var(--success);
        }

        .toast.show {
            transform: translateY(0);
            opacity: 1;
        }

        .toast.error {
            border-left-color: var(--accent);
        }

        .toast i {
            font-size: 1.2rem;
            color: var(--success);
        }

        .toast.error i {
            color: var(--accent);
        }

        /* Features */
        .features {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
            margin: 3rem 0;
        }

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

        .feature {
            background: white;
            padding: 2rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            text-align: center;
            transition: var(--transition);
        }

        .feature:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
        }

        .feature i {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 1rem;
            background: rgba(37, 99, 235, 0.1);
            width: 70px;
            height: 70px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            margin: 0 auto 1.5rem;
        }

        .feature h3 {
            font-size: 1.2rem;
            margin-bottom: 0.8rem;
            color: var(--dark);
        }

        .feature p {
            color: var(--gray);
            font-size: 0.95rem;
        }