:root {
            --primary-blue: #1e40af;
            --secondary-blue: #3b82f6;
            --light-blue: #dbeafe;
            --dark-blue: #1e3a8a;
            --gradient-primary: linear-gradient(135deg, #1e40af 0%, #3b82f6 50%, #60a5fa 100%);
            --gradient-secondary: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
            --text-dark: #1f2937;
            --text-light: #6b7280;
            --white: #ffffff;
            --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
            --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
            --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
            --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
        }

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

        body {
            font-family: 'Poppins', sans-serif;
            line-height: 1.7;
            color: var(--text-dark);
            overflow-x: hidden;
        }

        /* Smooth Scrolling */
        html {
            scroll-behavior: smooth;
        }

        /* Navbar Styles */
        .navbar {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.2);
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            padding: 1rem 0;
        }

        .navbar.scrolled {
            background: rgba(255, 255, 255, 0.98);
            box-shadow: var(--shadow-lg);
            padding: 0.5rem 0;
        }

        .navbar.transparent {
            background: rgba(255, 255, 255, 0.1);
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .navbar-brand {
            font-weight: 800;
            font-size: 1.75rem;
            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);
        }

        .nav-link {
            font-weight: 500;
            color: var(--text-dark) !important;
            position: relative;
            transition: all 0.3s ease;
            margin: 0 0.5rem;
        }

        .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%);
        }

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

        .nav-link:hover {
            color: var(--primary-blue) !important;
            transform: translateY(-2px);
        }

        /* Hero Section */
.hero {
    min-height: 100vh;
    background: var(--gradient-primary);
    position: relative;
    display: flex;
    align-items: center;
    overflow: hidden;
    padding: 4rem 0; /* biar ada ruang */
}

.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><pattern id="grid" width="50" height="50" patternUnits="userSpaceOnUse"><path d="M 50 0 L 0 0 0 50" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
}

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

.hero h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    margin-bottom: 1.2rem;
    line-height: 1.2;
    animation: slideInUp 1s ease-out;
}

.hero .lead {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    margin-bottom: 2rem;
    opacity: 0.95;
    animation: slideInUp 1s ease-out 0.2s both;
}

.btn-hero {
    background: #fff;
    color: var(--primary-blue);
    border: none;
    padding: 0.9rem 2rem;
    font-weight: 600;
    font-size: 1rem;
    border-radius: 50px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-lg);
    animation: slideInUp 1s ease-out 0.4s both;
    position: relative;
    overflow: hidden;
}

.btn-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.6s;
}

.btn-hero:hover::before {
    left: 100%;
}

.btn-hero:hover {
    background: var(--light-blue);
    color: var(--primary-blue);
    transform: translateY(-3px) scale(1.05);
    box-shadow: var(--shadow-xl);
}

/* Hero image */
.hero-image {
    animation: slideInUp 1s ease-out 0.6s both;
    max-width: 400px;
    width: 100%;
    height: auto;
    margin: 0 auto;
    display: block;
    position: relative;
    z-index: 2; /* biar gak ketiban */
}

.hero-image img {
    border-radius: 20px;
    box-shadow: var(--shadow-xl);
    transition: transform 0.4s ease;
    width: 100%;
    height: auto;
}

.hero-image:hover img {
    transform: scale(1.02) rotateY(5deg);
}

/* Responsive fix */
@media (max-width: 991px) {
    .hero {
        text-align: center;
        padding: 3rem 1rem;
    }
    .hero h1 {
        font-size: 2rem;
    }
    .hero .lead {
        font-size: 1rem;
    }
    .hero-image {
        max-width: 220px;
        margin-top: 1.5rem;
    }
}


        /* Section Styles */
        .section {
            padding: 5rem 0;
            position: relative;
        }

        .section-title {
            font-size: clamp(2rem, 4vw, 3rem);
            font-weight: 700;
            text-align: center;
            margin-bottom: 3rem;
            position: relative;
        }

        .section-title::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--gradient-primary);
            border-radius: 2px;
        }

        /* About Section */
        .about-section {
            background: var(--gradient-secondary);
        }

        .about-image {
            max-width: 100%;     /* biar gak lebih besar dari parent */
            width: 100%;         /* ikut lebar col */
            border-radius: 20px;
            overflow: hidden;
            box-shadow: var(--shadow-xl);
            transition: transform 0.4s ease;
            text-align: center;  /* biar gambar tetap center */
            margin-bottom: 40px;
        }

        .about-image img {
            width: 100%;         /* gambar ikut parent */
            height: auto;        /* jaga proporsi */
            display: block;
        }

        @media (min-width: 992px) {
        .about-image {
            max-width: 400px;  /* desktop tetap elegan */
            margin: 0 auto;    /* center di kolom */
        }
        }

        .about-image:hover {
            transform: scale(1.02);
        }

        .about-text h3 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            color: var(--text-dark);
        }

        .about-text p {
            font-size: 1.1rem;
            color: var(--text-light);
            margin-bottom: 1.5rem;
        }

        /* Feature Cards */
        .feature-card {
            background: white;
            border: none;
            border-radius: 20px;
            padding: 2.5rem;
            height: 100%;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            box-shadow: var(--shadow-md);
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--gradient-primary);
            transform: scaleX(0);
            transition: transform 0.4s ease;
        }

        .feature-card:hover::before {
            transform: scaleX(1);
        }

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

        .feature-icon {
            width: 80px;
            height: 80px;
            background: var(--gradient-primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            transition: transform 0.4s ease;
        }

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

        .feature-icon i {
            font-size: 2rem;
            color: white;
        }

        .feature-card h5 {
            font-size: 1.3rem;
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--text-dark);
        }

        .feature-card p {
            color: var(--text-light);
            font-size: 1rem;
        }

        /* Applications Section */
        .applications-section {
            background: white;
        }

        .app-card {
            background: white;
            border: none;
            border-radius: 20px;
            overflow: hidden;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            box-shadow: var(--shadow-md);
            height: 100%;
            position: relative;
        }

        .app-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--gradient-primary);
            opacity: 0;
            transition: opacity 0.4s ease;
            z-index: 1;
        }

        .app-card:hover::before {
            opacity: 0.05;
        }

        .app-card:hover {
            transform: translateY(-15px) scale(1.02);
            box-shadow: var(--shadow-xl);
        }

        .app-card img {
            height: 250px;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .app-card:hover img {
            transform: scale(1.1);
        }

        .app-card .card-body {
            padding: 2rem;
            position: relative;
            z-index: 2;
        }

        .app-card .card-title {
            font-size: 1.4rem;
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--text-dark);
        }

        .app-card .card-text {
            color: var(--text-light);
            margin-bottom: 1.5rem;
            font-size: 1rem;
        }

        .btn-outline-primary {
            border: 2px solid var(--primary-blue);
            color: var(--primary-blue);
            border-radius: 25px;
            padding: 0.6rem 1.5rem;
            font-weight: 500;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .btn-outline-primary::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: var(--primary-blue);
            transition: left 0.3s ease;
            z-index: -1;
        }

        .btn-outline-primary:hover::before {
            left: 0;
        }

        .btn-outline-primary:hover {
            color: white;
            border-color: var(--primary-blue);
            transform: translateY(-2px);
        }

        .btn-primary {
            background: var(--gradient-primary);
            border: none;
            border-radius: 25px;
            padding: 0.6rem 1.5rem;
            font-weight: 500;
            transition: all 0.3s ease;
        }

        .btn-primary:hover {
            background: var(--primary-blue);
            transform: translateY(-2px);
            box-shadow: var(--shadow-lg);
        }

        /* Contact Section */
        .contact-section {
            background: var(--gradient-secondary);
        }

        .contact-form {
            background: white;
            padding: 3rem;
            border-radius: 20px;
            box-shadow: var(--shadow-xl);
            transition: transform 0.4s ease;
        }

                .contact-form:hover {
            transform: translateY(-5px);
        }

        .form-control {
            border: 2px solid #e5e7eb;
            border-radius: 15px;
            padding: 1rem 1.5rem;
            font-size: 1rem;
            transition: all 0.3s ease;
            background: #f9fafb;
        }

        .form-control:focus {
            border-color: var(--primary-blue);
            box-shadow: 0 0 0 0.2rem rgba(30, 64, 175, 0.25);
            background: white;
        }

        .form-label {
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 0.5rem;
        }

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

        .contact-info::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -50%;
            width: 100%;
            height: 100%;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            transition: transform 0.6s ease;
        }

        .contact-info:hover::before {
            transform: scale(1.2);
        }

        .contact-info > * {
            position: relative;
            z-index: 2;
        }

        .contact-info h4 {
            font-weight: 700;
            margin-bottom: 2rem;
        }

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

        .contact-item i {
            font-size: 1.5rem;
            margin-right: 1rem;
            width: 40px;
            text-align: center;
        }

        .whatsapp-btn {
            background: #25d366;
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 25px;
            font-weight: 600;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            transition: all 0.3s ease;
            margin-top: 1rem;
        }

        .whatsapp-btn:hover {
            background: #128c7e;
            color: white;
            transform: translateY(-3px);
            box-shadow: var(--shadow-lg);
        }

        .social-links {
            margin-top: 2rem;
        }

        .social-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 50px;
            height: 50px;
            background: rgba(255, 255, 255, 0.2);
            color: white;
            border-radius: 50%;
            margin-right: 1rem;
            transition: all 0.3s ease;
            text-decoration: none;
        }

        .social-links a:hover {
            background: white;
            color: var(--primary-blue);
            transform: translateY(-3px);
        }

        /* Footer */
        .footer {
            background: var(--text-dark);
            color: white;
            padding: 3rem 0 2rem;
            position: relative;
        }

        .footer::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: var(--gradient-primary);
        }

        .footer a {
            color: #9ca3af;
            text-decoration: none;
            transition: color 0.3s ease;
        }

        .footer a:hover {
            color: white;
        }

        /* Animations */
        @keyframes slideInUp {
            from {
                opacity: 0;
                transform: translateY(50px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

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

        @keyframes slideInLeft {
            from {
                opacity: 0;
                transform: translateX(-50px);
            }
            to {
                opacity: 1;
                transform: translateX(0);
            }
        }

        @keyframes slideInRight {
            from {
                opacity: 0;
                transform: translateX(50px);
            }
            to {
                opacity: 1;
                transform: translateX(0);
            }
        }

        /* Scroll Animations */
        .fade-in {
            opacity: 0;
            transform: translateY(30px);
            transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }

        .slide-left {
            opacity: 0;
            transform: translateX(-50px);
            transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .slide-left.visible {
            opacity: 1;
            transform: translateX(0);
        }

        .slide-right {
            opacity: 0;
            transform: translateX(50px);
            transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .slide-right.visible {
            opacity: 1;
            transform: translateX(0);
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .hero {
                text-align: center;
            }
            
            .hero h1 {
                font-size: 2.5rem;
            }
            
            .section {
                padding: 3rem 0;
            }
            
            .section-title {
                font-size: 2rem;
            }
            
            .feature-card,
            .contact-form,
            .contact-info {
                padding: 2rem;
            }
            
            .navbar-brand {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 576px) {
            .hero h1 {
                font-size: 2rem;
            }
            
            .hero .lead {
                font-size: 1rem;
            }
            
            .btn-hero {
                padding: 0.8rem 2rem;
                font-size: 1rem;
            }
            
            .feature-card,
            .contact-form,
            .contact-info {
                padding: 1.5rem;
            }
        }

        /* Custom SweetAlert2 Styling */
        .swal2-popup {
            border-radius: 20px !important;
            font-family: 'Poppins', sans-serif !important;
        }

        .swal2-title {
            color: var(--text-dark) !important;
            font-weight: 600 !important;
        }

        .swal2-confirm {
            background: var(--gradient-primary) !important;
            border-radius: 25px !important;
            padding: 0.8rem 2rem !important;
            font-weight: 600 !important;
        }

        /* Loading Animation */
        .loading {
            display: inline-block;
            width: 20px;
            height: 20px;
            border: 3px solid rgba(30, 64, 175, 0.3);
            border-radius: 50%;
            border-top-color: var(--primary-blue);
            animation: spin 1s ease-in-out infinite;
        }

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

        /* Form Validation Styles */
.form-control.is-valid {
    border-color: #10b981;
    box-shadow: 0 0 0 0.2rem rgba(16, 185, 129, 0.25);
}

.form-control.is-invalid {
    border-color: #ef4444;
    box-shadow: 0 0 0 0.2rem rgba(239, 68, 68, 0.25);
}

.invalid-feedback {
    display: none;
    width: 100%;
    margin-top: 0.25rem;
    font-size: 0.875rem;
    color: #ef4444;
}

.form-control.is-invalid ~ .invalid-feedback {
    display: block;
}

/* Loading animation untuk button */
.btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

/* Success animation */
.form-success {
    animation: successPulse 0.6s ease-in-out;
}

@keyframes successPulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.02); }
    100% { transform: scale(1); }
}

/* Character counter */
.form-text {
    font-size: 0.8rem;
    margin-top: 0.5rem;
}

.visitor-counter {
  color : white;
  font-weight: bold;
  font-size: 1.1em;
}