:root {
            --primary-color: #3b82f6;
            --secondary-color: #1e40af;
            --accent-color: #60a5fa;
            --text-dark: #1e293b;
            --text-light: #64748b;
            --bg-light: #f8fafc;
            --white: #ffffff;
            --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
            --gradient-secondary: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
            --shadow-soft: 0 10px 40px rgba(59, 130, 246, 0.15);
            --shadow-hover: 0 20px 60px rgba(59, 130, 246, 0.25);
        }

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

        body {
            font-family: 'Inter', sans-serif;
            line-height: 1.6;
            color: var(--text-dark);
            overflow-x: hidden;
        }

        html {
            scroll-behavior: smooth;
        }
        html, body {
            overflow-x: hidden;
            width: 100%;
            max-width: 100vw;
        }
        ::-webkit-scrollbar {
            width: 8px;
        }

        ::-webkit-scrollbar-track {
            background: #f1f1f1;
        }

        ::-webkit-scrollbar-thumb {
            background: var(--gradient-primary);
            border-radius: 10px;
        }

        /* Preloader */
        .preloader {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: var(--gradient-primary);
            display: flex;
            justify-content: center;
            align-items: center;
            z-index: 9999;
            transition: opacity 0.5s ease-out;
        }

        .preloader-hidden {
            opacity: 0;
            pointer-events: none;
        }

        .loader {
            width: 50px;
            height: 50px;
            border: 3px solid rgba(255,255,255,0.3);
            border-top: 3px solid white;
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        /* Header */
        .navbar {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(20px);
            box-shadow: 0 2px 20px rgba(0,0,0,0.1);
            transition: all 0.3s ease;
            padding: 1rem 0;
        }

        .navbar-brand {
            font-size: 1.5rem;
            font-weight: 800;
            background: var(--gradient-primary);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            transition: all 0.3s ease;
        }

        .navbar-brand:hover {
            transform: scale(1.05);
        }

        .navbar-nav .nav-link {
            color: var(--text-dark);
            font-weight: 500;
            margin: 0 1rem;
            transition: all 0.3s ease;
            position: relative;
        }

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

        .navbar-nav .nav-link::after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            bottom: -5px;
            left: 50%;
            background: var(--gradient-primary);
            transition: all 0.3s ease;
            transform: translateX(-50%);
        }

        .navbar-nav .nav-link:hover::after {
            width: 100%;
        }

        .btn-gradient {
            background: var(--gradient-primary);
            border: none;
            padding: 0.75rem 2rem;
            border-radius: 50px;
            color: white;
            font-weight: 600;
            text-decoration: none;
            display: inline-block;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-soft);
        }

        .btn-gradient:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            color: white;
        }

        /* Hero Section */
        .hero {
            min-height: 100vh;
            background: var(--gradient-primary);
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><defs><radialGradient id="a" cx="50%" cy="50%"><stop offset="0%" stop-color="%23ffffff" stop-opacity="0.1"/><stop offset="100%" stop-color="%23ffffff" stop-opacity="0"/></radialGradient></defs><circle cx="200" cy="200" r="100" fill="url(%23a)"/><circle cx="800" cy="300" r="150" fill="url(%23a)"/><circle cx="400" cy="700" r="120" fill="url(%23a)"/></svg>');
        }

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

        .hero h1 {
            font-size: 3.5rem;
            font-weight: 800;
            color: white;
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }

        .hero p {
            font-size: 1.25rem;
            color: rgba(255,255,255,0.9);
            margin-bottom: 2rem;
        }

        .hero-image {
            position: relative;
            z-index: 2;
        }

        .floating-card {
            background: rgba(255,255,255,0.1);
            backdrop-filter: blur(20px);
            border-radius: 20px;
            padding: 2rem;
            border: 1px solid rgba(255,255,255,0.2);
            animation: float 6s ease-in-out infinite;
        }

        @keyframes float {
            0%, 100% { transform: translateY(0px); }
            50% { transform: translateY(-20px); }
        }

        .particles {
            position: absolute;
            width: 100%;
            height: 100%;
            overflow: hidden;
        }

        .particle {
            position: absolute;
            background: rgba(255,255,255,0.1);
            border-radius: 50%;
            animation: particle-float 15s infinite linear;
        }

        @keyframes particle-float {
            0% {
                transform: translateY(100vh) rotate(0deg);
                opacity: 0;
            }
            10% {
                opacity: 1;
            }
            90% {
                opacity: 1;
            }
            100% {
                transform: translateY(-100px) rotate(360deg);
                opacity: 0;
            }
        }

        /* Button improvements for hero */
        .btn-outline-light {
            border: 2px solid white;
            color: white;
            font-weight: 600;
            padding: 0.75rem 2rem;
            border-radius: 50px;
            transition: all 0.3s ease;
            text-decoration: none;
            display: inline-block;
        }

        .btn-outline-light:hover {
            background: white;
            border-color: white;
            color: var(--primary-color);
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(255,255,255,0.3);
        }

        .stat-item {
            padding: 1rem;
            border-radius: 10px;
            background: rgba(255,255,255,0.1);
            backdrop-filter: blur(10px);
            margin-bottom: 1rem;
        }

        .feature-highlight {
            border-radius: 15px;
            background: rgba(255,255,255,0.1);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255,255,255,0.2);
            transition: all 0.3s ease;
        }

        .feature-highlight:hover {
            background: rgba(255,255,255,0.2);
            transform: translateY(-5px);
        }

        /* Sections */
        .section-padding {
            padding: 5rem 0;
        }

        .section-title {
            text-align: center;
            margin-bottom: 4rem;
        }

        .section-title h2 {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
            background: var(--gradient-primary);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

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

        /* About Section */
        .about-card {
            background: white;
            border-radius: 20px;
            padding: 3rem;
            box-shadow: var(--shadow-soft);
            height: 100%;
            transition: all 0.3s ease;
        }

        .about-card:hover {
            transform: translateY(-10px);
            box-shadow: var(--shadow-hover);
        }

        /* Services Section */
        .services {
            background: var(--bg-light);
        }

        .service-card {
            background: white;
            border-radius: 20px;
            padding: 2.5rem;
            text-align: center;
            box-shadow: var(--shadow-soft);
            transition: all 0.3s ease;
            height: 100%;
            cursor: pointer;
        }

        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: var(--shadow-hover);
        }

        .service-icon {
            width: 80px;
            height: 80px;
            background: var(--gradient-primary);
            border-radius: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.5rem;
            font-size: 2rem;
            color: white;
            transition: all 0.3s ease;
        }

        .service-card:hover .service-icon {
            transform: rotate(5deg) scale(1.1);
        }

        .service-card h4 {
            font-size: 1.5rem;
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--text-dark);
        }

        .feature-list {
            list-style: none;
            padding: 0;
            text-align: left;
        }

        .feature-list li {
            padding: 0.5rem 0;
            color: var(--text-light);
        }

        .feature-list li i {
            color: var(--primary-color);
            margin-right: 0.5rem;
        }

        /* Contact Section */
        .contact-form {
            background: white;
            border-radius: 20px;
            padding: 3rem;
            box-shadow: var(--shadow-soft);
        }

        .form-control {
            border: 2px solid #e2e8f0;
            border-radius: 10px;
            padding: 1rem;
            margin-bottom: 1rem;
            transition: all 0.3s ease;
        }

        .form-control:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
            transform: translateY(-2px);
        }

        .contact-info {
            background: var(--gradient-primary);
            border-radius: 20px;
            padding: 3rem;
            color: white;
            height: 100%;
        }

        .contact-item {
            display: flex;
            align-items: center;
            margin-bottom: 2rem;
        }

        .contact-item i {
            font-size: 1.5rem;
            margin-right: 1rem;
            width: 50px;
            height: 50px;
            background: rgba(255,255,255,0.2);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .form-loading {
            opacity: 0.7;
            pointer-events: none;
        }

        .form-loading button {
            background: #ccc;
        }

        /* Footer */
        footer {
            background: var(--text-dark);
            color: white;
            padding: 2rem 0;
            text-align: center;
        }

        /* Modal */
        .modal-content {
            border-radius: 20px;
            border: none;
        }

        .modal-header {
            background: var(--gradient-primary);
            color: white;
            border-radius: 20px 20px 0 0;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.5rem;
            }
            
            .hero p {
                font-size: 1rem;
            }
            
            .section-title h2 {
                font-size: 2rem;
            }
        }

        /* Animations */
        .fade-in-up {
            opacity: 0;
            transform: translateY(30px);
            transition: all 0.6s ease;
        }

        .fade-in-up.visible {
            opacity: 1;
            transform: translateY(0);
        }
    .hero {
        padding-top: 100px; /* untuk menghindari tertutup navbar */
        min-height: 100vh; /* pastikan tetap full screen meski teks kosong */
        display: flex;
        align-items: center;
    }