:root {
            --primary-blue: #0066ff;
            --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
            --accent-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
            --success-gradient: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
            --warning-gradient: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
            --gold-gradient: linear-gradient(135deg, #fde047 0%, #f59e0b 100%);
            --dark-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            --light-blue: #60a5fa;
            --dark-blue: #1e40af;
            --white: #ffffff;
            --gray-50: #f8fafc;
            --gray-100: #f1f5f9;
            --gray-200: #e2e8f0;
            --gray-300: #cbd5e1;
            --gray-400: #94a3b8;
            --gray-600: #475569;
            --gray-700: #334155;
            --gray-800: #1e293b;
            --gray-900: #0f172a;
            --accent-glow: rgba(59, 130, 246, 0.4);
            --shadow-light: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
            --shadow-medium: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
            --shadow-heavy: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
            --shadow-glow: 0 0 50px rgba(59, 130, 246, 0.3);
            --border-radius: 20px;
            --border-radius-sm: 12px;
            --border-radius-lg: 32px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            line-height: 1.6; color: var(--gray-800); background: var(--gray-50);
            overflow-x: hidden; padding-top: 80px; font-feature-settings: 'kern' 1, 'liga' 1;
            -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
        }
        /* --- Header / Navbar --- */
        .main-header {
            position: fixed; top: 0; left: 0; width: 100%; height: 80px;
            background: rgba(255, 255, 255, 0.95); backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px); border-bottom: 1px solid var(--gray-200);
            z-index: 1000; display: flex; align-items: center; justify-content: space-between;
            padding: 0 2rem; transition: var(--transition);
        }
        .main-header.scrolled { background: rgba(255, 255, 255, 0.98); box-shadow: var(--shadow-medium); }
        .brand-logo {
            font-size: 1.5rem; font-weight: 800; background: var(--primary-gradient);
            -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
            text-decoration: none; display: flex; align-items: center; gap: 0.5rem;
        }
        .brand-logo::before { content: "🚀"; font-size: 1.8rem; background: none; -webkit-text-fill-color: initial; }
        .btn-nav {
            background: var(--primary-gradient); color: var(--white); padding: 0.75rem 2rem;
            border-radius: 50px; font-weight: 600; text-decoration: none;
            transition: var(--transition); cursor: pointer; border: none;
            box-shadow: var(--shadow-medium); position: relative; overflow: hidden; white-space: nowrap;
        }
        .btn-nav:hover { transform: translateY(-2px); box-shadow: var(--shadow-heavy); }
        .btn-nav::before {
            content: ''; position: absolute; top: 0; left: -100%; width: 100%; height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
            transition: left 0.5s;
        }
        .btn-nav:hover::before { left: 100%; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        /* --- Hero Section --- */
        .hero {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
            background-size: 400% 400%; min-height: calc(100vh - 80px);
            display: flex; align-items: center; justify-content: center; text-align: center;
            color: white; position: relative; overflow: hidden; animation: gradientShift 15s ease infinite;
        }
        .hero::before {
            content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0;
            background: radial-gradient(circle at 20% 80%, rgba(255,255,255,0.1) 0%, transparent 50%), radial-gradient(circle at 80% 20%, rgba(255,255,255,0.1) 0%, transparent 50%), radial-gradient(circle at 40% 40%, rgba(255,255,255,0.05) 0%, transparent 50%);
            animation: float 20s ease-in-out infinite;
        }
        .hero-content {
            max-width: 900px; padding: 3rem; position: relative; z-index: 2;
            animation: fadeInUp 1s ease-out; background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
            border-radius: var(--border-radius-lg); border: 1px solid rgba(255, 255, 255, 0.2);
            box-shadow: var(--shadow-heavy);
        }
        .hero h1 {
            font-size: 4rem; font-weight: 900; margin-bottom: 1.5rem;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3); letter-spacing: -2px; line-height: 1.1;
        }
        .hero .subtitle {
            font-size: 1.4rem; margin-bottom: 3rem; opacity: 0.95; font-weight: 400;
            max-width: 700px; margin-left: auto; margin-right: auto;
        }
        .cta-buttons { display: flex; gap: 1.5rem; justify-content: center; flex-wrap: wrap; margin-top: 2rem; }
        .btn {
            display: inline-flex; align-items: center; gap: 0.5rem; padding: 1rem 2.5rem;
            border-radius: 50px; text-decoration: none; font-weight: 600;
            transition: var(--transition); cursor: pointer; border: none;
            font-size: 1.1rem; position: relative; overflow: hidden;
        }
        .btn-primary { background: var(--white); color: var(--primary-blue); box-shadow: var(--shadow-heavy); }
        .btn-primary:hover { transform: translateY(-3px) scale(1.05); box-shadow: var(--shadow-glow); }
        .btn-secondary {
            background: rgba(255, 255, 255, 0.1); color: var(--white);
            border: 2px solid rgba(255, 255, 255, 0.3); backdrop-filter: blur(10px);
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.2); border-color: rgba(255, 255, 255, 0.5);
            transform: translateY(-3px) scale(1.05);
        }
        /* --- Apps Grid Section --- */
        .apps-section { padding: 8rem 0; background: var(--gray-50); position: relative; }
        .apps-section::before {
            content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
            background: linear-gradient(90deg, transparent, var(--gray-300), transparent);
        }
        .section-header { text-align: center; margin-bottom: 5rem; }
        .section-title {
            font-size: 3.5rem; font-weight: 800; background: var(--primary-gradient);
            -webkit-background-clip: text; -webkit-text-fill-color: transparent;
            background-clip: text; margin-bottom: 1.5rem; letter-spacing: -1px;
        }
        .section-subtitle {
            font-size: 1.3rem; color: var(--gray-600); max-width: 700px;
            margin: 0 auto; line-height: 1.7;
        }
        .apps-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); gap: 2.5rem; }
        .app-card {
            background: var(--white); border-radius: var(--border-radius); padding: 0;
            box-shadow: var(--shadow-medium); border: 1px solid var(--gray-200);
            transition: var(--transition); position: relative; overflow: hidden;
            display: flex; flex-direction: column; will-change: transform;
        }
        .app-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-heavy); border-color: var(--gray-300); }

        .app-card.highlight {
            border: 2px solid transparent;
            background: linear-gradient(white, white) padding-box, var(--gold-gradient) border-box;
            transform: scale(1.02);
        }
        .app-card.highlight:hover {
            transform: translateY(-12px) scale(1.05);
            box-shadow: 0 0 40px rgba(253, 224, 71, 0.5);
        }
        .app-card.highlight::before {
            content: '⭐ FITUR UNGGULAN';
            position: absolute; top: 1rem; right: 1rem;
            background: var(--gold-gradient); color: var(--gray-900);
            padding: 0.5rem 1rem; border-radius: 50px; font-size: 0.8rem;
            font-weight: 700; z-index: 10; box-shadow: var(--shadow-medium);
        }
        .app-card.highlight .app-icon { background: var(--gold-gradient); }
        .app-card.highlight .app-link { background: var(--gold-gradient); color: var(--gray-900); }

        .app-thumbnail {
            width: 100%; height: 150px; background: var(--gray-100);
            border-radius: var(--border-radius) var(--border-radius) 0 0;
            overflow: hidden; position: relative; display: flex; align-items: center;
            justify-content: center; background-size: cover; background-position: center;
            background-repeat: no-repeat;
        }
        .app-thumbnail::before {
            content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0;
            background: linear-gradient(135deg, rgba(0,0,0,0.1), rgba(0,0,0,0.3));
            transition: var(--transition);
        }
        .app-card:hover .app-thumbnail::before { background: linear-gradient(135deg, rgba(0,0,0,0.2), rgba(0,0,0,0.4)); }
        .app-thumbnail-placeholder { font-size: 4rem; color: var(--gray-400); position: relative; z-index: 1; }
        .app-content { padding: 1.5rem; flex-grow: 1; display: flex; flex-direction: column; }
        .app-header { display: flex; align-items: center; gap: 1rem; margin-bottom: 1rem; }
        .app-icon {
            width: 48px; height: 48px; background: var(--primary-gradient);
            border-radius: var(--border-radius-sm); display: flex; align-items: center;
            justify-content: center; flex-shrink: 0; box-shadow: var(--shadow-medium);
            transition: var(--transition);
        }
        .app-card:hover .app-icon { transform: scale(1.1); }
        .app-icon svg { width: 24px; height: 24px; color: var(--white); }
        .app-card h3 { font-size: 1.4rem; font-weight: 700; color: var(--gray-900); margin: 0; line-height: 1.3; }
        .app-card p { color: var(--gray-600); margin: 1rem 0 1.5rem 0; line-height: 1.6; flex-grow: 1; }
        
        /* Button Styles */
        .app-actions {
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
            margin-top: auto;
        }
        .app-link {
            display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
            background: var(--primary-gradient); color: white; padding: 1rem 1.5rem;
            border-radius: var(--border-radius-sm); text-decoration: none; font-weight: 600;
            transition: var(--transition); text-align: center;
            position: relative; overflow: hidden; cursor: pointer;
        }
        .app-link.locked {
            background: var(--gray-600);
            cursor: pointer; 
        }
        .app-link.locked:hover { background: var(--gray-700); transform: translateY(-2px); }
        .app-link:not(.locked):hover { transform: translateY(-2px); box-shadow: var(--shadow-medium); }
        .app-link::before {
            content: ''; position: absolute; top: 0; left: -100%; width: 100%; height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
            transition: left 0.5s;
        }
        .app-link:hover::before { left: 100%; }
        .app-link svg { width: 18px; height: 18px; }

        .app-link-detail {
            display: none;
            align-items: center;
            justify-content: center;
            padding: 0.9rem 1.5rem;
            border-radius: var(--border-radius-sm);
            text-decoration: none;
            font-weight: 600;
            transition: var(--transition);
            text-align: center;
            cursor: pointer;
            background: transparent;
            color: var(--primary-blue);
            border: 2px solid var(--primary-blue);
        }
        .app-link-detail:hover {
            background: var(--primary-blue);
            color: var(--white);
            transform: translateY(-2px);
            box-shadow: var(--shadow-light);
        }

        .app-status {
            display: inline-block; padding: 0.25rem 0.75rem; border-radius: 50px;
            font-size: 0.8rem; font-weight: 600; margin-bottom: 1rem;
        }
        .app-status.trial { background: var(--accent-gradient); color: white; }
        .app-status.pro { background: var(--success-gradient); color: white; }
        .app-status.locked { background: var(--gray-200); color: var(--gray-600); }
        /* --- Modal Styles --- */
        .modal-overlay {
            position: fixed; top: 0; left: 0; width: 100%; height: 100%;
            background: rgba(15, 23, 42, 0.7); backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px); display: flex; align-items: center;
            justify-content: center; z-index: 2000; opacity: 0;
            transition: var(--transition); visibility: hidden;
        }
        .modal-overlay.visible { opacity: 1; visibility: visible; }
        .modal-content {
            background: var(--white); padding: 2.5rem; border-radius: var(--border-radius);
            box-shadow: var(--shadow-heavy); width: 90%; max-width: 500px;
            position: relative; transform: translateY(20px) scale(0.95);
            transition: var(--transition); max-height: 90vh; overflow-y: auto;
        }
        .modal-overlay.visible .modal-content { transform: translateY(0) scale(1); }
        .modal-close-btn {
            position: absolute; top: 1rem; right: 1rem; background: var(--gray-100);
            border: none; width: 32px; height: 32px; border-radius: 50%;
            font-size: 1.5rem; color: var(--gray-600); cursor: pointer;
            display: flex; align-items: center; justify-content: center;
            transition: var(--transition-fast); z-index: 10;
        }
        .modal-close-btn:hover { background: var(--gray-200); transform: rotate(90deg); }
        .modal-content h2 {
            font-size: 1.8rem; color: var(--gray-900); margin-bottom: 0.5rem;
            text-align: center; display: flex; align-items: center;
            justify-content: center; gap: 0.5rem;
        }
        .modal-content p { text-align: center; color: var(--gray-600); margin-bottom: 2rem; line-height: 1.6; }
        .modal-form { display: flex; flex-direction: column; gap: 1rem; }
        .modal-form input {
            width: 100%; border: 2px solid var(--gray-200); padding: 1rem;
            border-radius: var(--border-radius-sm); font-size: 1rem;
            transition: var(--transition-fast); font-family: inherit;
        }
        .modal-form input:focus { outline: none; border-color: var(--primary-blue); box-shadow: 0 0 0 3px var(--accent-glow); }
        .modal-form button, .modal-form a.btn {
            background: var(--primary-gradient); color: white; border: none;
            padding: 1rem 1.5rem; border-radius: var(--border-radius-sm);
            font-weight: 600; cursor: pointer; transition: var(--transition);
            width: 100%; text-align: center; text-decoration: none;
            display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
        }
        .modal-form button:hover, .modal-form a.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-medium); }
        .modal-error-message { color: #ef4444; text-align: center; min-height: 1.5rem; font-size: 0.9rem; }
        /* --- Other Sections --- */
        .about-section { padding: 6rem 0; background: var(--white); text-align: center; }
        .about-section h2 { font-size: 2.5rem; font-weight: 700; color: var(--gray-900); margin-bottom: 1.5rem; }
        .about-section p { font-size: 1.2rem; color: var(--gray-600); max-width: 800px; margin: 0 auto; line-height: 1.7; }
        .footer { background: var(--gray-900); color: var(--white); padding: 4rem 2rem 2rem; text-align: center; }
        .footer-content { display: flex; justify-content: space-around; flex-wrap: wrap; gap: 2rem; margin-bottom: 3rem; text-align: left; }
        .footer-section { min-width: 200px; }
        .footer-section h3 { margin-bottom: 1rem; color: var(--white); font-weight: 600; }
        .footer-section a { color: var(--gray-300); text-decoration: none; transition: var(--transition); display: block; margin-bottom: 0.5rem; }
        .footer-section a:hover { color: var(--light-blue); }
        .footer-bottom { border-top: 1px solid var(--gray-800); padding-top: 2rem; color: var(--gray-400); }
        /* --- Animations & Effects --- */
        @keyframes gradientShift { 0% { background-position: 0% 50%; } 50% { background-position: 100% 50%; } 100% { background-position: 0% 50%; } }
        @keyframes fadeInUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
        @keyframes float { 0%, 100% { transform: translateY(0px); } 50% { transform: translateY(-20px); } }
        @keyframes bounce { 0%, 20%, 50%, 80%, 100% { transform: translate(-50%, 0); } 40% { transform: translate(-50%, -15px); } 60% { transform: translate(-50%, -7px); } }
        .scroll-indicator { position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%); color: white; font-size: 1.5rem; animation: bounce 2s infinite; text-decoration: none; opacity: 0.8; }
        .loading { display: inline-block; width: 20px; height: 20px; border: 3px solid rgba(255, 255, 255, 0.3); border-radius: 50%; border-top-color: var(--white); animation: spin 1s ease-in-out infinite; vertical-align: middle; }
        @keyframes spin { to { transform: rotate(360deg); } }
        
        /* --- Responsive Design --- */
        @media (max-width: 768px) {
            .hero h1 { font-size: 2.8rem; }
            .hero .subtitle { font-size: 1.2rem; }
            .apps-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .section-title { font-size: 2.5rem; }
            .main-header { padding: 0 1rem; }
            .brand-logo { font-size: 1.3rem; }
            .hero-content { padding: 2rem; }
            .app-thumbnail {
                height: 120px;
            }
        }
        @media (max-width: 480px) {
            .hero h1 { font-size: 2.4rem; }
            .hero-content { padding: 1.5rem; }
            .apps-grid {
                gap: 1rem;
                grid-template-columns: repeat(2, 1fr);
            }
            .modal-content { padding: 1.5rem; }
            /* UPDATED: Thumbnail style for smartphone */
            .app-thumbnail {
                aspect-ratio: 1 / 1; /* Create a 1:1 aspect ratio (square) */
                height: auto;       /* Allow height to adjust automatically */
            }
            .app-thumbnail-placeholder {
                font-size: 2.5rem;
            }
            .app-content {
                padding: 0.75rem;
            }
            .app-header {
                gap: 0.5rem;
                margin-bottom: 0.5rem;
            }
            .app-icon {
                width: 32px;
                height: 32px;
            }
            .app-icon svg {
                width: 16px;
                height: 16px;
            }
            .app-card h3 {
                font-size: 0.9rem;
                line-height: 1.2;
            }
            .app-card p {
                font-size: 0.8rem;
                line-height: 1.3;
                margin: 0.5rem 0 1rem 0;
            }
            .app-link {
                padding: 0.6rem;
                font-size: 0.8rem;
                gap: 0.25rem;
            }
            .app-link-detail {
                padding: 0.6rem;
                font-size: 0.8rem;
            }
            .app-link svg {
                width: 14px;
                height: 14px;
            }
            .app-status {
                font-size: 0.6rem;
                padding: 0.2rem 0.5rem;
                margin-bottom: 0.5rem;
            }
            .app-card.highlight::before {
                font-size: 0.6rem;
                padding: 0.3rem 0.6rem;
                top: 0.5rem;
                right: 0.5rem;
            }
        }