:root {
            --primary-orange: #F37021;
            --dark-bg: #1a1a1a;
            --light-gray: #f8f9fa;
            --metal-gray: #8a9ba8;
            --dark-gray: #333333;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Roboto', sans-serif;
            color: #333;
            overflow-x: hidden;
        }
        
        h1, h2, h3, h4, h5 {
            font-family: 'Montserrat', sans-serif;
            font-weight: 700;
        }
        
        /* Navbar */
        .navbar {
            background: rgba(26, 26, 26, 0.95);
            backdrop-filter: blur(10px);
            padding: 1rem 0;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        
        .navbar-brand {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-orange) !important;
        }
        
        .navbar-nav .nav-link {
            color: #fff !important;
            margin: 0 15px;
            font-weight: 500;
            transition: color 0.3s;
        }
        
        .navbar-nav .nav-link:hover {
            color: var(--primary-orange) !important;
        }
        
        .btn-primary-custom {
            background: var(--primary-orange);
            border: none;
            padding: 12px 30px;
            font-weight: 600;
            border-radius: 50px;
            transition: all 0.3s;
            color: white;
        }
        
        .btn-primary-custom:hover {
            background: #d96019;
            transform: translateY(-2px);
            box-shadow: 0 5px 20px rgba(243, 112, 33, 0.4);
        }
        
        /* Hero Section */
        .hero-section {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            overflow: hidden;
            background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
        }
        
        .hero-bg {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('https://images.unsplash.com/photo-1486262715619-67b85e0b08d3?w=1920') center/cover;
            opacity: 0.3;
            z-index: 1;
        }
        
        .hero-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, rgba(243, 112, 33, 0.1) 0%, rgba(26, 26, 26, 0.9) 100%);
            z-index: 2;
        }
        
        .hero-content {
            position: relative;
            z-index: 3;
            color: white;
        }
        
        .hero-title {
            font-size: 3.5rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 1.5rem;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
        }
        
        .hero-subtitle {
            font-size: 1.3rem;
            margin-bottom: 2rem;
            color: #e0e0e0;
        }
        
        /* Floating Elements Animation */
        .floating-elements {
            position: absolute;
            width: 100%;
            height: 100%;
            z-index: 2;
            pointer-events: none;
        }
        
        .floating-icon {
            position: absolute;
            color: rgba(243, 112, 33, 0.3);
            font-size: 3rem;
            animation: float 6s ease-in-out infinite;
        }
        
        .floating-icon:nth-child(1) { top: 20%; left: 10%; animation-delay: 0s; }
        .floating-icon:nth-child(2) { top: 60%; left: 15%; animation-delay: 1s; }
        .floating-icon:nth-child(3) { top: 30%; right: 20%; animation-delay: 2s; }
        .floating-icon:nth-child(4) { bottom: 25%; right: 15%; animation-delay: 1.5s; }
        
        @keyframes float {
            0%, 100% { transform: translateY(0px) rotate(0deg); }
            50% { transform: translateY(-20px) rotate(5deg); }
        }
        
        /* Benefits Section */
        .benefits-section {
            padding: 100px 0;
            background: var(--light-gray);
        }
        
        .benefit-card {
            background: white;
            border-radius: 15px;
            padding: 40px 30px;
            text-align: center;
            box-shadow: 0 5px 20px rgba(0,0,0,0.08);
            transition: all 0.3s;
            height: 100%;
            border-top: 4px solid var(--primary-orange);
        }
        
        .benefit-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 40px rgba(243, 112, 33, 0.2);
        }
        
        .benefit-icon {
            font-size: 3.5rem;
            color: var(--primary-orange);
            margin-bottom: 1.5rem;
        }
        
        .benefit-card h3 {
            font-size: 1.5rem;
            margin-bottom: 1rem;
            color: var(--dark-gray);
        }
        
        /* Converter Section */
        .converter-section {
            padding: 100px 0;
            background: white;
        }
        
        .converter-box {
            background: var(--light-gray);
            border-radius: 15px;
            padding: 40px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.1);
        }
        
        .converter-input {
            padding: 15px;
            border: 2px solid #ddd;
            border-radius: 10px;
            font-size: 1.1rem;
            transition: border 0.3s;
        }
        
        .converter-input:focus {
            border-color: var(--primary-orange);
            outline: none;
        }
        
        .converter-result {
            background: var(--primary-orange);
            color: white;
            padding: 20px;
            border-radius: 10px;
            font-size: 1.5rem;
            font-weight: 700;
            text-align: center;
            margin-top: 20px;
        }
        
        /* Demo Section */
        .demo-section {
            padding: 100px 0;
            background: linear-gradient(135deg, var(--dark-bg) 0%, #2d2d2d 100%);
            color: white;
        }
        
        .demo-video {
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 10px 40px rgba(0,0,0,0.3);
        }
        
        /* Form Section */
        .form-section {
            padding: 100px 0;
            background: var(--light-gray);
        }
        
        .form-container {
            background: white;
            border-radius: 15px;
            padding: 50px;
            box-shadow: 0 10px 40px rgba(0,0,0,0.1);
        }
        
        .form-control-custom {
            padding: 15px;
            border: 2px solid #e0e0e0;
            border-radius: 10px;
            transition: all 0.3s;
        }
        
        .form-control-custom:focus {
            border-color: var(--primary-orange);
            box-shadow: 0 0 0 0.2rem rgba(243, 112, 33, 0.25);
        }
        
        .alert-success-custom {
            background: #d4edda;
            border: 2px solid #28a745;
            color: #155724;
            padding: 20px;
            border-radius: 10px;
            display: none;
        }
        
        /* Testimonials */
        .testimonials-section {
            padding: 100px 0;
            background: white;
        }
        
        .testimonial-card {
            background: var(--light-gray);
            border-radius: 15px;
            padding: 40px;
            margin: 20px 0;
            box-shadow: 0 5px 20px rgba(0,0,0,0.08);
        }
        
        .testimonial-avatar {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            margin-bottom: 20px;
            border: 4px solid var(--primary-orange);
        }
        
        .testimonial-stars {
            color: #ffc107;
            font-size: 1.2rem;
            margin-bottom: 15px;
        }
        
        /* CTA Section */
        .cta-section {
            padding: 100px 0;
            background: linear-gradient(135deg, var(--primary-orange) 0%, #d96019 100%);
            color: white;
            text-align: center;
        }
        
        .cta-section h2 {
            font-size: 3rem;
            margin-bottom: 1.5rem;
        }
        
        .btn-white-custom {
            background: white;
            color: var(--primary-orange);
            padding: 15px 40px;
            font-weight: 700;
            border-radius: 50px;
            border: none;
            font-size: 1.2rem;
            transition: all 0.3s;
        }
        
        .btn-white-custom:hover {
            transform: scale(1.05);
            box-shadow: 0 10px 30px rgba(0,0,0,0.3);
        }
        
        /* Footer */
        .footer {
            background: var(--dark-bg);
            color: white;
            padding: 60px 0 20px;
        }
        
        .footer h5 {
            color: var(--primary-orange);
            margin-bottom: 20px;
        }
        
        .footer a {
            color: #aaa;
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .footer a:hover {
            color: var(--primary-orange);
        }
        
        .social-icons a {
            font-size: 1.5rem;
            margin: 0 10px;
            color: white;
            transition: all 0.3s;
        }
        
        .social-icons a:hover {
            color: var(--primary-orange);
            transform: translateY(-3px);
        }
        
        /* Responsive */
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.2rem;
            }
            
            .hero-subtitle {
                font-size: 1rem;
            }
            
            .form-container {
                padding: 30px 20px;
            }
            
            .cta-section h2 {
                font-size: 2rem;
            }
        }
        
        /* Loading Spinner */
        .spinner-border-custom {
            color: var(--primary-orange);
        }
        
        .section-title {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            color: var(--dark-gray);
        }
        
        .section-subtitle {
            font-size: 1.2rem;
            color: var(--metal-gray);
            margin-bottom: 3rem;
        }