:root {
            /* HSL Variables - Lebih Efisien untuk Transition */
            --primary-h: 260;
            --primary-s: 76%;
            --primary-l: 63%;
            
            --secondary-h: 160;
            --secondary-s: 84%;
            --secondary-l: 46%;
            
            --accent-h: 38;
            --accent-s: 92%;
            --accent-l: 53%;
            
            --surface-h: 220;
            --surface-s: 33%;
            --surface-l: 15%;
            
            --text-h: 210;
            --text-s: 40%;
            --text-l: 96%;
            
            /* RGB Variables untuk Opacity */
            --primary-rgb: 139, 92, 246;
            --surface-rgb: 30, 41, 59;
            --text-rgb: 248, 250, 252;
            
            /* Performance Optimized Variables */
            --blur-amount: 5px;
            --transition-fast: 150ms ease;
            --transition-normal: 250ms ease;
            --transition-slow: 400ms ease;
            
            /* Border Radius */
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            
            /* Spacing */
            --space-xs: 4px;
            --space-sm: 8px;
            --space-md: 16px;
            --space-lg: 24px;
            --space-xl: 32px;
            --space-2xl: 40px;
            --space-3xl: 48px;
        }

        /* Light Theme Variables */
        [data-theme="light_mode"] {
            --primary-l: 58%;
            --surface-l: 98%;
            --text-l: 15%;
            
            --primary-rgb: 124, 58, 237;
            --surface-rgb: 248, 250, 252;
            --text-rgb: 15, 23, 42;
        }

        /* System Preference Detection */
        @media (prefers-color-scheme: light) {
            :root:not([data-theme]) {
                --primary-l: 58%;
                --surface-l: 98%;
                --text-l: 15%;
                
                --primary-rgb: 124, 58, 237;
                --surface-rgb: 248, 250, 252;
                --text-rgb: 15, 23, 42;
            }
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            background-color: hsl(var(--surface-h), var(--surface-s), var(--surface-l));
            color: hsl(var(--text-h), var(--text-s), var(--text-l));
            min-height: 100vh;
            overflow-x: hidden;
            /* Hanya transisi properti yang penting */
            transition: background-color var(--transition-normal), color var(--transition-normal);
            position: relative;
        }

        /* Optimized Background */
        .background {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -3;
            background: 
                radial-gradient(
                    circle at 20% 20%,
                    rgba(var(--primary-rgb), 0.05) 0%,
                    transparent 50%
                ),
                radial-gradient(
                    circle at 80% 80%,
                    rgba(var(--primary-rgb), 0.03) 0%,
                    transparent 50%
                );
            transition: opacity var(--transition-normal);
            opacity: 1;
        }

        [data-theme="light_mode"] .background {
            opacity: 0.7;
        }

        /* Optimized Noise Texture - Lebih Ringan */
        .noise {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -2;
            opacity: 0.015;
            background-image: 
                linear-gradient(45deg, rgba(255,255,255,0.02) 25%, transparent 25%),
                linear-gradient(-45deg, rgba(255,255,255,0.02) 25%, transparent 25%),
                linear-gradient(45deg, transparent 75%, rgba(255,255,255,0.02) 75%),
                linear-gradient(-45deg, transparent 75%, rgba(255,255,255,0.02) 75%);
            background-size: 20px 20px;
            pointer-events: none;
        }

        /* Floating Elements yang Lebih Ringan */
        .floating-elements {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            pointer-events: none;
            overflow: hidden;
        }

        .floating-element {
            position: absolute;
            border-radius: 50%;
            background: radial-gradient(
                circle at center,
                rgba(var(--primary-rgb), 0.1) 0%,
                transparent 70%
            );
            filter: blur(30px);
            opacity: 0.2;
            animation: float 25s infinite ease-in-out;
            will-change: transform, opacity;
        }

        .floating-element:nth-child(1) {
            width: 200px;
            height: 200px;
            top: 10%;
            left: 5%;
            animation-delay: 0s;
        }

        .floating-element:nth-child(2) {
            width: 150px;
            height: 150px;
            top: 60%;
            right: 10%;
            animation-delay: -8s;
            background: radial-gradient(
                circle at center,
                rgba(16, 185, 129, 0.08) 0%,
                transparent 70%
            );
        }

        .floating-element:nth-child(3) {
            width: 100px;
            height: 100px;
            bottom: 20%;
            left: 15%;
            animation-delay: -16s;
            background: radial-gradient(
                circle at center,
                rgba(245, 158, 11, 0.08) 0%,
                transparent 70%
            );
        }

        @keyframes float {
            0%, 100% {
                transform: translate(0, 0) scale(1);
            }
            33% {
                transform: translate(20px, -30px) scale(1.05);
            }
            66% {
                transform: translate(-15px, 15px) scale(0.95);
            }
        }

        /* Container */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--space-lg);
        }

        /* Optimized Navigation */
        .navbar {
            padding: var(--space-xl) 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            position: relative;
            z-index: 100;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: var(--space-sm);
            font-size: 22px;
            font-weight: 800;
            color: hsl(var(--text-h), var(--text-s), var(--text-l));
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: var(--radius-md);
            background: linear-gradient(
                135deg,
                hsl(var(--primary-h), var(--primary-s), var(--primary-l)),
                hsl(calc(var(--primary-h) + 20), var(--primary-s), var(--primary-l))
            );
            color: white;
            font-size: 18px;
        }

        .logo-text {
            background: linear-gradient(
                135deg,
                hsl(var(--primary-h), var(--primary-s), var(--primary-l)),
                hsl(calc(var(--primary-h) + 20), var(--primary-s), var(--primary-l))
            );
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: var(--space-md);
        }

        /* Optimized Theme Toggle */
        .theme-toggle {
            position: relative;
            width: 52px;
            height: 28px;
            background: rgba(var(--surface-rgb), 0.8);
            border-radius: 100px;
            border: 1px solid rgba(var(--primary-rgb), 0.2);
            cursor: pointer;
            transition: all var(--transition-fast);
            display: flex;
            align-items: center;
            padding: 3px;
        }

        .theme-toggle:hover {
            transform: scale(1.05);
            border-color: rgba(var(--primary-rgb), 0.4);
            box-shadow: 0 0 15px rgba(var(--primary-rgb), 0.2);
        }

        .theme-toggle::before {
            content: '';
            position: absolute;
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: linear-gradient(
                135deg,
                hsl(var(--primary-h), var(--primary-s), var(--primary-l)),
                hsl(calc(var(--primary-h) + 20), var(--primary-s), var(--primary-l))
            );
            transition: transform var(--transition-fast);
            will-change: transform;
        }

        [data-theme="light_mode"] .theme-toggle::before {
            transform: translateX(24px);
        }

        .theme-toggle i {
            position: absolute;
            font-size: 12px;
            color: white;
            z-index: 1;
            transition: opacity var(--transition-fast);
        }

        .theme-toggle .sun {
            left: 7px;
            opacity: 1;
        }

        .theme-toggle .moon {
            right: 7px;
            opacity: 1;
        }

        [data-theme="light_mode"] .theme-toggle .sun {
            opacity: 0.8;
        }

        [data-theme="light_mode"] .theme-toggle .moon {
            opacity: 0.8;
        }

        /* Optimized Hero Section */
        .hero {
            padding: var(--space-3xl) 0;
            position: relative;
        }

        .hero-content {
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: var(--space-xs);
            background: linear-gradient(
                135deg,
                hsl(var(--primary-h), var(--primary-s), var(--primary-l)),
                hsl(calc(var(--primary-h) + 20), var(--primary-s), var(--primary-l))
            );
            color: white;
            padding: var(--space-sm) var(--space-lg);
            border-radius: 100px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: var(--space-2xl);
            animation: fadeIn 0.6s ease forwards;
            opacity: 0;
        }

        .hero-title {
            font-size: clamp(40px, 4.5vw, 64px);
            font-weight: 800;
            line-height: 1.1;
            margin-bottom: var(--space-xl);
            letter-spacing: -0.02em;
            animation: slideUp 0.8s ease forwards;
            opacity: 0;
        }

        .hero-title .gradient-text {
            background: linear-gradient(
                135deg,
                hsl(var(--primary-h), var(--primary-s), var(--primary-l)),
                hsl(calc(var(--primary-h) + 20), var(--primary-s), var(--primary-l))
            );
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-subtitle {
            font-size: clamp(16px, 1.8vw, 18px);
            line-height: 1.6;
            color: hsl(var(--text-h), var(--text-s), calc(var(--text-l) * 0.8));
            margin-bottom: var(--space-2xl);
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
            animation: fadeIn 0.8s ease forwards 0.2s;
            opacity: 0;
        }

        .cta-buttons {
            display: flex;
            gap: var(--space-md);
            justify-content: center;
            flex-wrap: wrap;
        }

        /* Optimized Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: var(--space-sm);
            padding: var(--space-md) var(--space-xl);
            border-radius: var(--radius-lg);
            font-size: 15px;
            font-weight: 600;
            text-decoration: none;
            transition: all var(--transition-normal);
            border: 2px solid transparent;
            cursor: pointer;
            position: relative;
            overflow: hidden;
            will-change: transform, box-shadow;
        }

        .btn-primary {
            background: linear-gradient(
                135deg,
                hsl(var(--primary-h), var(--primary-s), var(--primary-l)),
                hsl(calc(var(--primary-h) + 20), var(--primary-s), var(--primary-l))
            );
            color: white;
            box-shadow: 0 8px 25px rgba(var(--primary-rgb), 0.25);
            animation: fadeIn 0.8s ease forwards 0.4s;
            opacity: 0;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 15px 35px rgba(var(--primary-rgb), 0.35);
        }

        .btn-secondary {
            background: rgba(var(--surface-rgb), 0.9);
            color: hsl(var(--text-h), var(--text-s), var(--text-l));
            border-color: rgba(var(--primary-rgb), 0.1);
            animation: fadeIn 0.8s ease forwards 0.5s;
            opacity: 0;
        }

        .btn-secondary:hover {
            border-color: rgba(var(--primary-rgb), 0.3);
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
        }

        /* Optimized Cards - Tanpa Backdrop-filter */
        .card {
            background: rgba(var(--surface-rgb), 0.95);
            border: 1px solid rgba(var(--primary-rgb), 0.1);
            border-radius: var(--radius-lg);
            padding: var(--space-xl);
            transition: all var(--transition-normal);
            position: relative;
            overflow: hidden;
            will-change: transform, border-color;
        }

        .card:hover {
            transform: translateY(-5px);
            border-color: rgba(var(--primary-rgb), 0.3);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
        }

        /* Features Section */
        .features {
            padding: var(--space-3xl) 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: var(--space-3xl);
        }

        .section-title {
            font-size: clamp(32px, 3.5vw, 42px);
            font-weight: 700;
            margin-bottom: var(--space-lg);
            line-height: 1.2;
        }

        .section-subtitle {
            font-size: 16px;
            color: hsl(var(--text-h), var(--text-s), calc(var(--text-l) * 0.8));
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.6;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: var(--space-lg);
        }

        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: linear-gradient(
                135deg,
                hsl(var(--primary-h), var(--primary-s), var(--primary-l)),
                hsl(calc(var(--primary-h) + 20), var(--primary-s), var(--primary-l))
            );
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: var(--space-lg);
            color: white;
            font-size: 22px;
            box-shadow: 0 8px 20px rgba(var(--primary-rgb), 0.25);
        }

        .feature-title {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: var(--space-md);
            color: hsl(var(--text-h), var(--text-s), var(--text-l));
        }

        .feature-description {
            color: hsl(var(--text-h), var(--text-s), calc(var(--text-l) * 0.8));
            line-height: 1.6;
            font-size: 15px;
        }

        /* Personas Section */
        .personas {
            padding: var(--space-3xl) 0;
        }

        .personas-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: var(--space-lg);
        }

        .persona-header {
            display: flex;
            align-items: center;
            gap: var(--space-md);
            margin-bottom: var(--space-lg);
        }

        .persona-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 18px;
            flex-shrink: 0;
        }

        .persona-title {
            font-size: 16px;
            font-weight: 600;
            color: hsl(var(--text-h), var(--text-s), var(--text-l));
            margin-bottom: 4px;
        }

        .persona-tag {
            font-size: 13px;
            color: hsl(var(--primary-h), var(--primary-s), var(--primary-l));
            font-weight: 500;
            background: rgba(var(--primary-rgb), 0.1);
            padding: 3px 10px;
            border-radius: 100px;
            display: inline-block;
        }

        .persona-description {
            color: hsl(var(--text-h), var(--text-s), calc(var(--text-l) * 0.8));
            line-height: 1.6;
            font-size: 15px;
        }

        /* CTA Section */
        .cta-section {
            padding: var(--space-3xl) 0;
        }

        .cta-card {
            background: linear-gradient(
                135deg,
                hsl(var(--primary-h), var(--primary-s), var(--primary-l)),
                hsl(calc(var(--primary-h) + 20), var(--primary-s), var(--primary-l))
            );
            border-radius: var(--radius-xl);
            padding: var(--space-2xl);
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: 0 20px 50px rgba(var(--primary-rgb), 0.25);
        }

        .cta-content {
            position: relative;
            z-index: 2;
        }

        .cta-title {
            font-size: clamp(28px, 3vw, 36px);
            font-weight: 700;
            color: white;
            margin-bottom: var(--space-md);
        }

        .cta-description {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: var(--space-xl);
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        /* Footer */
        .footer {
            padding: var(--space-3xl) 0 var(--space-xl);
            border-top: 1px solid rgba(var(--primary-rgb), 0.1);
        }

        .footer-content {
            display: grid;
            grid-template-columns: 1fr 2fr;
            gap: var(--space-2xl);
            margin-bottom: var(--space-xl);
        }

        .footer-brand {
            display: flex;
            flex-direction: column;
            gap: var(--space-md);
        }

        .footer-logo {
            font-size: 18px;
            font-weight: 800;
            background: linear-gradient(
                135deg,
                hsl(var(--primary-h), var(--primary-s), var(--primary-l)),
                hsl(calc(var(--primary-h) + 20), var(--primary-s), var(--primary-l))
            );
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .footer-tagline {
            color: hsl(var(--text-h), var(--text-s), calc(var(--text-l) * 0.8));
            line-height: 1.6;
            font-size: 14px;
        }

        .footer-links {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--space-xl);
        }

        .link-group h4 {
            font-size: 13px;
            font-weight: 600;
            color: hsl(var(--text-h), var(--text-s), var(--text-l));
            margin-bottom: var(--space-md);
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        .link-group a {
            display: block;
            color: hsl(var(--text-h), var(--text-s), calc(var(--text-l) * 0.8));
            text-decoration: none;
            font-size: 14px;
            margin-bottom: var(--space-sm);
            transition: color var(--transition-fast);
        }

        .link-group a:hover {
            color: hsl(var(--primary-h), var(--primary-s), var(--primary-l));
        }

        .footer-bottom {
            text-align: center;
            padding-top: var(--space-lg);
            border-top: 1px solid rgba(var(--primary-rgb), 0.1);
            color: hsl(var(--text-h), var(--text-s), calc(var(--text-l) * 0.6));
            font-size: 12px;
        }

        /* Animation Classes */
        .fade-in {
            animation: fadeIn 0.6s ease forwards;
        }

        .slide-up {
            animation: slideUp 0.8s ease forwards;
        }

        @keyframes fadeIn {
            to {
                opacity: 1;
            }
        }

        @keyframes slideUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* Theme Transition Overlay */
        .theme-transition {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: hsl(var(--surface-h), var(--surface-s), var(--surface-l));
            z-index: 9999;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.2s ease;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .footer-content {
                grid-template-columns: 1fr;
                gap: var(--space-xl);
            }
            
            .footer-links {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .hero {
                padding: var(--space-2xl) 0;
            }
            
            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }
            
            .btn {
                width: 100%;
                max-width: 280px;
            }
            
            .features-grid,
            .personas-grid {
                grid-template-columns: 1fr;
            }
            
            .footer-links {
                grid-template-columns: 1fr;
                gap: var(--space-lg);
            }
            
            .cta-card {
                padding: var(--space-xl) var(--space-lg);
            }
            
            /* Nonaktifkan efek berat pada mobile */
            .floating-elements {
                display: none;
            }
            
            .background {
                opacity: 0.5;
            }
        }

        @media (max-width: 480px) {
            .hero-title {
                font-size: 32px;
            }
            
            .section-title {
                font-size: 28px;
            }
            
            .card {
                padding: var(--space-lg);
            }
        }