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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: #333;
            line-height: 1.6;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header */
        header {
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(10px);
            padding: 1rem 0;
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
        }

        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 1.8rem;
            font-weight: bold;
            color: white;
        }

        .nav-links {
            display: flex;
            gap: 2rem;
            list-style: none;
        }

        .nav-links a {
            color: white;
            text-decoration: none;
            transition: opacity 0.3s;
        }

        .nav-links a:hover {
            opacity: 0.8;
        }

        /* Hero Section */
        .hero {
            padding: 8rem 0 4rem;
            text-align: center;
            color: white;
        }

        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 1rem;
            font-weight: 700;
        }

        .hero p {
            font-size: 1.3rem;
            margin-bottom: 3rem;
            opacity: 0.9;
        }

        .cta-button {
            display: inline-block;
            background: linear-gradient(45deg, #ff6b6b, #ee5a52);
            color: white;
            padding: 1rem 2rem;
            border: none;
            border-radius: 50px;
            font-size: 1.1rem;
            font-weight: 600;
            text-decoration: none;
            transition: transform 0.3s, box-shadow 0.3s;
            cursor: pointer;
        }

        .cta-button:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(255, 107, 107, 0.3);
        }

        /* Features Section */
        .features {
            padding: 4rem 0;
            background: white;
        }

        .features h2 {
            text-align: center;
            font-size: 2.5rem;
            margin-bottom: 3rem;
            color: #333;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin-bottom: 3rem;
        }

        .feature-card {
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            padding: 2rem;
            border-radius: 20px;
            text-align: center;
            transition: transform 0.3s;
        }

        .feature-card:hover {
            transform: translateY(-5px);
        }

        .feature-icon {
            font-size: 3rem;
            margin-bottom: 1rem;
        }

        .feature-card h3 {
            font-size: 1.3rem;
            margin-bottom: 1rem;
            color: #333;
        }

        /* Pricing Section */
        .pricing {
            padding: 4rem 0;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
        }

        .pricing h2 {
            text-align: center;
            font-size: 2.5rem;
            margin-bottom: 1rem;
        }

        .pricing-subtitle {
            text-align: center;
            font-size: 1.2rem;
            margin-bottom: 3rem;
            opacity: 0.9;
        }

        .pricing-grid {
            display: flex;
            gap: 2rem;
            max-width: 1100px;
            margin: 0 auto;
            justify-content: center;
        }

        .pricing-card {
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(10px);
            padding: 2rem;
            border-radius: 20px;
            text-align: center;
            border: 2px solid transparent;
            transition: all 0.3s;
            flex: 1;
            min-width: 280px;
            max-width: 320px;
            position: relative;
        }

        .pricing-card.popular {
            border-color: #ff6b6b;
            transform: scale(1.05);
        }

        .pricing-card.free {
            background: rgba(46, 204, 113, 0.15);
            border-color: #2ecc71;
        }

        .popular-badge {
            position: absolute;
            top: -10px;
            left: 50%;
            transform: translateX(-50%);
            background: linear-gradient(45deg, #ff6b6b, #ee5a52);
            color: white;
            padding: 0.5rem 1rem;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: bold;
        }

        .intro-badge {
            position: absolute;
            top: -10px;
            right: -10px;
            background: linear-gradient(45deg, #f39c12, #e67e22);
            color: white;
            padding: 0.3rem 0.8rem;
            border-radius: 15px;
            font-size: 0.7rem;
            font-weight: bold;
            transform: rotate(15deg);
        }

        .pricing-card h3 {
            font-size: 1.5rem;
            margin-bottom: 1rem;
        }

        .price {
            font-size: 2.5rem;
            font-weight: bold;
            margin-bottom: 0.5rem;
            color: #ff6b6b;
        }

        .price.free {
            color: #2ecc71;
        }

        .original-price {
            font-size: 1.2rem;
            text-decoration: line-through;
            opacity: 0.7;
            margin-bottom: 1rem;
            color: #ff9999;
        }

        .features-list {
            list-style: none;
            margin-bottom: 2rem;
        }

        .features-list li {
            padding: 0.5rem 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .error {
            background: #ff6b6b;
            color: white;
            padding: 1rem;
            border-radius: 10px;
            margin-bottom: 1rem;
            text-align: center;
        }

        /* Modal Styles */
        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.8);
            backdrop-filter: blur(5px);
            z-index: 2000;
            animation: fadeIn 0.3s ease-out;
        }

        .modal.show {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .modal-content {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 3rem 2rem;
            border-radius: 20px;
            text-align: center;
            max-width: 500px;
            width: 90%;
            margin: 0 20px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
            animation: slideUp 0.4s ease-out;
            position: relative;
        }

        .modal-content h2 {
            font-size: 2rem;
            margin-bottom: 1rem;
            color: #fff;
        }

        .modal-content p {
            font-size: 1.1rem;
            margin-bottom: 2rem;
            opacity: 0.9;
            line-height: 1.6;
        }

        .modal-buttons {
            display: flex;
            gap: 1rem;
            justify-content: center;
            flex-wrap: wrap;
        }

        .modal-button {
            padding: 0.8rem 2rem;
            border: none;
            border-radius: 50px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            text-decoration: none;
            display: inline-block;
        }

        .modal-button.primary {
            background: linear-gradient(45deg, #ff6b6b, #ee5a52);
            color: white;
        }

        .modal-button.primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(255, 107, 107, 0.3);
        }

        .modal-button.secondary {
            background: rgba(255, 255, 255, 0.2);
            color: white;
            border: 2px solid rgba(255, 255, 255, 0.3);
        }

        .modal-button.secondary:hover {
            background: rgba(255, 255, 255, 0.3);
        }

        .close-button {
            position: absolute;
            top: 1rem;
            right: 1rem;
            background: none;
            border: none;
            color: white;
            font-size: 2rem;
            cursor: pointer;
            opacity: 0.7;
            transition: opacity 0.3s;
        }

        .close-button:hover {
            opacity: 1;
        }

        .success-icon {
            font-size: 4rem;
            margin-bottom: 1rem;
            display: block;
        }

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

        @keyframes slideUp {
            from {
                opacity: 0;
                transform: translateY(50px) scale(0.9);
            }
            to {
                opacity: 1;
                transform: translateY(0) scale(1);
            }
        }

        /* Footer */
        footer {
            background: #333;
            color: white;
            padding: 2rem 0;
            text-align: center;
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.5rem;
            }

            .nav-links {
                display: none;
            }

            .features-grid {
                grid-template-columns: 1fr;
            }

            .pricing-grid {
                flex-direction: column;
                align-items: center;
            }

            .pricing-card {
                max-width: 100%;
            }

            .modal-content {
                padding: 2rem 1.5rem;
            }
            
            .modal-buttons {
                flex-direction: column;
                align-items: center;
            }
            
            .modal-button {
                width: 100%;
                max-width: 250px;
            }
        }

        /* Animations */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .feature-card,
        .pricing-card {
            animation: fadeInUp 0.6s ease-out;
        }