:root {
            --primary-color: #06B6D4;
            --primary-dark: #0E7490;
            --primary-light: #22D3EE;
            --primary-lighter: #A5F3FC;
            --accent-color: #10b981;
            --accent-dark: #059669;
            --background-light: #f8fafc;
            --text-dark: #1e293b;
            --text-light: #64748b;
            --border-color: #e2e8f0;
            --shadow: 0 4px 15px rgba(6, 182, 212, 0.1);
            --shadow-hover: 0 8px 30px rgba(6, 182, 212, 0.2);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--text-dark);
            background: #f8fafc;
            min-height: 100vh;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Navigation */
        .nav-container {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }

        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
            flex-wrap: wrap;
        }

        .logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary-color);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .nav-links {
            display: flex;
            list-style: none;
            gap: 1.5rem;
            align-items: center;
            flex-wrap: wrap;
        }

        .nav-links a {
            text-decoration: none;
            color: var(--text-dark);
            font-weight: 500;
            transition: color 0.3s ease;
            padding: 0.5rem 1rem;
            border-radius: 8px;
        }

        .nav-links a:hover {
            color: var(--primary-color);
            background: rgba(6, 182, 212, 0.1);
        }

        /* Language Switcher */
        .language-switcher {
            display: flex;
            gap: 0.5rem;
            align-items: center;
        }

        .lang-btn {
            border: 2px solid var(--border-color);
            background: white;
            color: var(--text-dark);
            padding: 0.5rem 1rem;
            border-radius: 20px;
            cursor: pointer;
            font-size: 0.9rem;
            font-weight: 600;
            transition: all 0.3s ease;
        }

        .lang-btn.active {
            background: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
        }

        .lang-btn:hover:not(.active) {
            border-color: var(--primary-color);
            color: var(--primary-color);
        }

        /* Hero Section */
        .hero {
            background: linear-gradient(135deg, #0E7490 0%, #06B6D4 50%, #67E8F9 100%);
            color: white;
            padding: 5rem 0 3rem;
            text-align: center;
        }

        .hero h1 {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 1rem;
            letter-spacing: -0.02em;
        }

        .hero .subtitle {
            font-size: 1.4rem;
            opacity: 0.95;
            max-width: 700px;
            margin: 0 auto 2rem;
            line-height: 1.5;
        }

        .hero-badges {
            display: flex;
            justify-content: center;
            gap: 1rem;
            margin-bottom: 2.5rem;
            flex-wrap: wrap;
        }

        .badge {
            background: rgba(255, 255, 255, 0.2);
            backdrop-filter: blur(10px);
            padding: 0.5rem 1.2rem;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 600;
            border: 1px solid rgba(255, 255, 255, 0.3);
        }

        .hero-screenshot {
            max-width: 900px;
            margin: 0 auto;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
        }

        .hero-screenshot img {
            width: 100%;
            height: auto;
            display: block;
        }

        /* Feature Cards Grid */
        .features-section {
            padding: 5rem 0;
        }

        .section-title {
            text-align: center;
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 0.8rem;
            color: var(--text-dark);
        }

        .section-subtitle {
            text-align: center;
            font-size: 1.1rem;
            color: var(--text-light);
            max-width: 600px;
            margin: 0 auto 3rem;
        }

        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
            gap: 2rem;
        }

        .feature-card {
            background: white;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all 0.3s ease;
            border: 1px solid var(--border-color);
        }

        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .feature-card img {
            width: 100%;
            height: 220px;
            object-fit: cover;
            cursor: pointer;
        }

        .feature-card-content {
            padding: 1.5rem;
        }

        .feature-card-content h3 {
            font-size: 1.3rem;
            margin-bottom: 0.5rem;
            color: var(--primary-color);
        }

        .feature-card-content p {
            color: var(--text-light);
            font-size: 0.95rem;
        }

        .feature-card-content ul {
            color: var(--text-light);
            font-size: 0.9rem;
            padding-left: 1.2rem;
            margin-top: 0.5rem;
        }

        .feature-card-content li {
            margin-bottom: 0.3rem;
        }

        /* Detail Section */
        .detail-section {
            padding: 4rem 0;
            border-top: 1px solid var(--border-color);
        }

        .detail-section:nth-child(even) {
            background: white;
        }

        .detail-row {
            display: flex;
            align-items: center;
            gap: 3rem;
        }

        .detail-row.reverse {
            flex-direction: row-reverse;
        }

        .detail-text {
            flex: 1;
        }

        .detail-text h2 {
            font-size: 2rem;
            margin-bottom: 1rem;
            color: var(--text-dark);
        }

        .detail-text p {
            color: var(--text-light);
            margin-bottom: 1rem;
            font-size: 1.05rem;
        }

        .detail-text ul {
            color: var(--text-light);
            padding-left: 1.5rem;
        }

        .detail-text li {
            margin-bottom: 0.4rem;
        }

        .detail-image {
            flex: 1;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }

        .detail-image img {
            width: 100%;
            height: auto;
            display: block;
            cursor: pointer;
        }

        /* Privacy Banner */
        .privacy-banner {
            background: linear-gradient(135deg, #ecfdf5, #d1fae5);
            border: 1px solid #10b981;
            border-radius: 16px;
            padding: 2.5rem;
            margin: 3rem 0;
            text-align: center;
        }

        .privacy-banner h2 {
            color: var(--accent-dark);
            font-size: 1.8rem;
            margin-bottom: 1rem;
        }

        .privacy-banner p {
            color: #047857;
            font-size: 1.05rem;
            max-width: 700px;
            margin: 0 auto;
        }

        /* Screenshot Gallery */
        .screenshot-gallery {
            padding: 4rem 0;
            background: white;
        }

        .screenshot-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1rem;
        }

        .screenshot-item {
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
            cursor: pointer;
            transition: transform 0.3s ease;
        }

        .screenshot-item:hover {
            transform: scale(1.02);
        }

        .screenshot-item img {
            width: 100%;
            height: auto;
            display: block;
        }

        .screenshot-item .caption {
            padding: 0.8rem;
            font-size: 0.85rem;
            color: var(--text-light);
            text-align: center;
            background: var(--background-light);
        }

        /* Lightbox */
        .lightbox {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.9);
            z-index: 10000;
            justify-content: center;
            align-items: center;
            cursor: pointer;
        }

        .lightbox.active {
            display: flex;
        }

        .lightbox img {
            max-width: 90%;
            max-height: 90%;
            border-radius: 8px;
            box-shadow: 0 0 40px rgba(0, 0, 0, 0.5);
        }

        .lightbox-close {
            position: absolute;
            top: 20px;
            right: 30px;
            color: white;
            font-size: 2.5rem;
            cursor: pointer;
            font-weight: 300;
            line-height: 1;
        }

        /* Hover preview — feature cards only */
        #hover-popup {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.72);
            z-index: 9999;
            justify-content: center;
            align-items: center;
            animation: hoverFadeIn 0.14s ease;
        }

        #hover-popup.active {
            display: flex;
        }

        #hover-popup img {
            max-width: 82%;
            max-height: 82vh;
            border-radius: 12px;
            box-shadow: 0 24px 64px rgba(0, 0, 0, 0.55);
            animation: hoverPopIn 0.14s ease;
            pointer-events: none;
        }

        .feature-card img {
            cursor: zoom-in;
        }

        @keyframes hoverFadeIn {
            from { opacity: 0; }
            to   { opacity: 1; }
        }

        @keyframes hoverPopIn {
            from { transform: scale(0.94); opacity: 0; }
            to   { transform: scale(1);    opacity: 1; }
        }

        /* Footer */
        footer {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
            color: white;
            padding: 3rem 0;
            text-align: center;
        }

        footer a {
            color: var(--primary-lighter);
            text-decoration: none;
        }

        footer a:hover {
            text-decoration: underline;
        }

        .footer-links {
            display: flex;
            justify-content: center;
            gap: 2rem;
            margin-bottom: 1.5rem;
            flex-wrap: wrap;
        }

        .footer-copyright {
            opacity: 0.8;
            font-size: 0.9rem;
        }

        /* CTA Buttons */
        .hero-cta {
            display: flex;
            justify-content: center;
            gap: 1rem;
            margin-bottom: 3rem;
            flex-wrap: wrap;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: white;
            color: var(--primary-color);
            padding: 0.9rem 2rem;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            text-decoration: none;
            transition: all 0.3s ease;
            box-shadow: 0 4px 20px rgba(0,0,0,0.15);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(0,0,0,0.25);
            background: #e0f7fb;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: transparent;
            color: white;
            padding: 0.9rem 2rem;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            text-decoration: none;
            border: 2px solid rgba(255,255,255,0.7);
            transition: all 0.3s ease;
        }

        .btn-outline:hover {
            background: rgba(255,255,255,0.15);
            border-color: white;
            transform: translateY(-2px);
        }

        /* Pricing / Get Section */
        .get-section {
            padding: 5rem 0;
            background: var(--background-light);
        }

        .pricing-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            max-width: 780px;
            margin: 0 auto;
        }

        .pricing-card {
            background: white;
            border-radius: 20px;
            padding: 2.5rem 2rem;
            text-align: center;
            border: 2px solid var(--border-color);
            box-shadow: var(--shadow);
            transition: all 0.3s ease;
        }

        .pricing-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .pricing-card.featured {
            border-color: var(--primary-color);
            position: relative;
        }

        .pricing-card.featured::before {
            content: attr(data-label-active);
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--primary-color);
            color: white;
            padding: 0.25rem 1rem;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 700;
            white-space: nowrap;
        }

        .pricing-icon {
            font-size: 2.5rem;
            margin-bottom: 1rem;
        }

        .pricing-card h3 {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--text-dark);
        }

        .pricing-card .price {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary-color);
            margin: 0.75rem 0;
        }

        .pricing-card .price span {
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-light);
        }

        .pricing-card p {
            color: var(--text-light);
            font-size: 0.95rem;
            margin-bottom: 1.5rem;
            line-height: 1.5;
        }

        .pricing-card ul {
            list-style: none;
            margin-bottom: 2rem;
            text-align: left;
        }

        .pricing-card ul li {
            padding: 0.35rem 0;
            font-size: 0.9rem;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .pricing-card ul li::before {
            content: "✓";
            color: var(--accent-color);
            font-weight: 700;
            flex-shrink: 0;
        }

        .btn-card-primary {
            display: block;
            background: var(--primary-color);
            color: white;
            padding: 0.85rem 1.5rem;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.95rem;
            text-decoration: none;
            transition: all 0.3s ease;
        }

        .btn-card-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
        }

        .btn-card-outline {
            display: block;
            background: transparent;
            color: var(--primary-color);
            padding: 0.85rem 1.5rem;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.95rem;
            text-decoration: none;
            border: 2px solid var(--primary-color);
            transition: all 0.3s ease;
        }

        .btn-card-outline:hover {
            background: rgba(6, 182, 212, 0.05);
            transform: translateY(-1px);
        }

        .platform-buttons {
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
        }

        .btn-platform {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.65rem 1.2rem;
            border-radius: 10px;
            font-size: 0.9rem;
            font-weight: 600;
            text-decoration: none;
            border: 1.5px solid var(--border-color);
            color: var(--text-dark);
            background: var(--background-light);
            transition: all 0.2s ease;
        }

        .btn-platform:hover {
            border-color: var(--primary-color);
            color: var(--primary-color);
            background: rgba(6, 182, 212, 0.04);
            transform: translateX(3px);
        }

        .btn-platform .platform-icon {
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .btn-platform .platform-label {
            flex: 1;
            text-align: left;
        }

        .btn-platform .platform-arrow {
            opacity: 0.4;
            font-size: 0.8rem;
        }

        /* Download form (gate) */
        .dl-form {
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
        }

        .dl-form input {
            width: 100%;
            padding: 0.7rem 1rem;
            border: 1.5px solid var(--border-color);
            border-radius: 10px;
            font-size: 0.95rem;
            font-family: inherit;
            color: var(--text-dark);
            background: var(--background-light);
            transition: border-color 0.2s ease, background 0.2s ease;
        }

        .dl-form input:focus {
            outline: none;
            border-color: var(--primary-color);
            background: white;
        }

        .dl-form .btn-card-primary {
            border: none;
            cursor: pointer;
            width: 100%;
            font-family: inherit;
        }

        .dl-note {
            font-size: 0.8rem;
            color: var(--text-light);
            text-align: center;
            margin: 0;
        }

        .error-msg {
            color: #dc2626;
            font-size: 0.85rem;
            min-height: 1rem;
            text-align: center;
        }

        .dl-success {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 0.4rem;
            text-align: center;
            padding: 0.5rem 0;
        }

        .dl-success-icon { font-size: 2rem; }
        .dl-success-title { font-weight: 700; color: var(--accent-dark); }
        .dl-success-sub { font-size: 0.9rem; color: var(--text-light); }

        /* Mac App Store badge */
        .appstore-badge {
            display: block;
            margin-top: auto;
            text-align: center;
        }

        .appstore-badge img {
            height: 48px;
            width: auto;
            display: inline-block;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .pricing-grid {
                grid-template-columns: 1fr;
            }
        }
            .hero h1 {
                font-size: 2.2rem;
            }

            .hero .subtitle {
                font-size: 1.1rem;
            }

            .detail-row,
            .detail-row.reverse {
                flex-direction: column;
            }

            .feature-grid {
                grid-template-columns: 1fr;
            }

            .section-title {
                font-size: 1.8rem;
            }

            .nav-links {
                gap: 0.5rem;
            }

            .screenshot-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 480px) {
            .hero {
                padding: 3rem 0 2rem;
            }

            .hero h1 {
                font-size: 1.8rem;
            }

            .hero-badges {
                flex-direction: column;
                align-items: center;
            }

            .screenshot-grid {
                grid-template-columns: 1fr;
            }
        }