:root {
            --primary-color: #16A34A;
            --primary-dark: #15803D;
            --white: #FFFFFF;
            --black: #000000;
            --gray-light: #F8FAFC;
            --gray-border: #E2E8F0;
            --text-dark: #0F172A;
            --text-gray: #475569;
            --text-light: #64748B;
            
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Manrope', sans-serif;
            background-color: var(--white);
            color: var(--text-dark);
            line-height: 1.5;
        }
        
        /* Header & Navigation */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            z-index: 1000;
            border-bottom: 1px solid var(--gray-border);
            padding: 20px 0;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        .nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .logo {
            font-family: 'Shantell Sans', cursive;
            font-size: 24px;
            font-weight: 700;
            color: var(--primary-color);
            text-decoration: none;
        }
        
        .nav-menu {
            display: flex;
            gap: 40px;
            list-style: none;
        }
        
        .nav-menu a {
            text-decoration: none;
            color: var(--text-dark);
            font-size: 18px;
            font-weight: 500;
            transition: color 0.2s;
        }
        
        .nav-menu a:hover {
            color: var(--primary-color);
        }
        
        .download-btn {
            background: var(--primary-color);
            color: white;
            padding: 12px 32px;
            border-radius: var(--radius-md);
            text-decoration: none;
            font-size: 18px;
            font-weight: 600;
            transition: background 0.2s;
        }
        
        .download-btn:hover {
            background: var(--primary-dark);
        }
        
        /* Hero Section */
        .hero {
            padding: 180px 0 100px;
            position: relative;
        }
        
        .hero-content {
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
        }
        
        .hero h1 {
            font-family: 'Manrope', sans-serif;
            font-size: 46px;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 24px;
            color: var(--text-dark);
        }
        
        .hero-subtitle {
            font-size: 20px;
            color: var(--text-gray);
            margin-bottom: 48px;
            line-height: 1.6;
        }
        
        .hero-image {
            width: 100%;
            max-width: 1000px;
            margin: 60px auto 0;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
        }
        
        .hero-image img {
            width: 100%;
            height: auto;
            display: block;
        }
        
        .image-placeholder {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            height: 500px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 24px;
            font-weight: 600;
        }
        
        /* How It Works */
        .how-it-works {
            padding: 100px 0;
            background: var(--gray-light);
        }
        
        .section-title {
            font-size: 36px;
            font-weight: 700;
            text-align: center;
            margin-bottom: 60px;
            color: var(--text-dark);
        }
        
        .steps {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            max-width: 1000px;
            margin: 0 auto;
        }
        
        .step {
            display: flex;
            gap: 24px;
        }
        
        .step-number {
            font-family: 'Shantell Sans', cursive;
            font-size: 48px;
            font-weight: 700;
            color: var(--primary-color);
            min-width: 60px;
        }
        
        .step-content h3 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-dark);
        }
        
        .step-content p {
            font-size: 16px;
            color: var(--text-gray);
            line-height: 1.6;
        }
        
        /* Features */
        .features {
            padding: 100px 0;
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 40px;
            max-width: 1000px;
            margin: 0 auto;
        }
        
        .features-menu {
            background: var(--white);
            border: 1px solid var(--gray-border);
            border-radius: var(--radius-lg);
            padding: 32px;
        }
        
        .features-menu h3 {
            font-family: 'Shantell Sans', cursive;
            font-size: 24px;
            font-weight: 600;
            color: var(--primary-color);
            margin-bottom: 24px;
        }
        
        .features-list {
            list-style: none;
        }
        
        .features-list li {
            font-size: 18px;
            padding: 12px 0;
            border-bottom: 1px solid var(--gray-border);
            color: var(--text-dark);
            font-weight: 500;
        }
        
        .features-list li:last-child {
            border-bottom: none;
        }
        
        .auth-section {
            background: var(--white);
            border: 1px solid var(--gray-border);
            border-radius: var(--radius-lg);
            padding: 32px;
        }
        
        .auth-section h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 16px;
            color: var(--text-dark);
        }
        
        .auth-section p {
            font-size: 16px;
            color: var(--text-gray);
            margin-bottom: 24px;
            line-height: 1.6;
        }
        
        .whatsapp-btn {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            background: #25D366;
            color: white;
            padding: 16px 32px;
            border-radius: var(--radius-md);
            text-decoration: none;
            font-size: 18px;
            font-weight: 600;
            transition: background 0.2s;
        }
        
        .whatsapp-btn:hover {
            background: #1DA851;
        }
        
        /* Footer */
        .footer {
            background: #1F2937;
            color: white;
            padding: 60px 0 40px;
        }
        
        .footer-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 40px;
        }
        
        .footer-logo {
            font-family: 'Shantell Sans', cursive;
            font-size: 24px;
            font-weight: 700;
            color: white;
        }
        
        .footer-links {
            display: flex;
            gap: 32px;
        }
        
        .footer-links a {
            color: white;
            text-decoration: none;
            font-size: 16px;
        }
        
        .footer-links a:hover {
            opacity: 0.8;
        }
        
        .copyright {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
        }
        
        /* Responsive */
        @media (max-width: 1024px) {
            .hero h1 {
                font-size: 38px;
            }
            
            .steps {
                gap: 40px;
            }
            
            .features-grid {
                gap: 30px;
            }
        }
        
        @media (max-width: 768px) {
            .nav-menu {
                display: none;
            }
            
            .hero {
                padding: 140px 0 60px;
            }
            
            .hero h1 {
                font-size: 32px;
            }
            
            .hero-subtitle {
                font-size: 18px;
            }
            
            .steps {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            
            .features-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            
            .footer-content {
                flex-direction: column;
                gap: 30px;
                text-align: center;
            }
            
            .footer-links {
                flex-direction: column;
                gap: 16px;
            }
        }
        
        @media (max-width: 480px) {
            .container {
                padding: 0 16px;
            }
            
            .hero h1 {
                font-size: 28px;
            }
            
            .hero-subtitle {
                font-size: 16px;
            }
            
            .section-title {
                font-size: 28px;
            }
            
            .step {
                flex-direction: column;
                gap: 16px;
            }
            
            .step-number {
                font-size: 36px;
            }
            
            .download-btn, .whatsapp-btn {
                width: 100%;
                text-align: center;
                padding: 16px;
            }
        }
        
        /* Mobile Menu Toggle */
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
        }
        
        .menu-toggle span {
            display: block;
            width: 25px;
            height: 3px;
            background: var(--text-dark);
            margin: 5px 0;
            transition: 0.3s;
        }
        
        @media (max-width: 768px) {
            .menu-toggle {
                display: block;
            }
            
            .nav-menu.active {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: white;
                padding: 20px;
                box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
                border-top: 1px solid var(--gray-border);
            }
            
            .nav-menu.active li {
                margin: 10px 0;
            }
        }