:root {
            --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
            --dark-bg: #0f0f1e;
            --card-bg: #1a1a2e;
            --text-primary: #ffffff;
            --text-secondary: #b8b8d1;
        }

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

        body {
            font-family: 'Inter', system-ui, -apple-system, sans-serif;
            background-color: var(--dark-bg);
            color: var(--text-primary);
            overflow-x: hidden;
        }

        .gradient-text {
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .gradient-bg {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
        }

        .gradient-border {
            background: var(--primary-gradient);
            padding: 2px;
            border-radius: 1rem;
        }

        .glass-effect {
            background: rgba(26, 26, 46, 0.8);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .feature-card {
            background: var(--card-bg);
            border: 1px solid rgba(102, 126, 234, 0.2);
            transition: all 0.3s ease;
        }

        .feature-card:hover {
            transform: translateY(-5px);
            border-color: rgba(102, 126, 234, 0.5);
            box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
        }

        .pulse-animation {
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0% {
                box-shadow: 0 0 0 0 rgba(102, 126, 234, 0.7);
            }
            70% {
                box-shadow: 0 0 0 10px rgba(102, 126, 234, 0);
            }
            100% {
                box-shadow: 0 0 0 0 rgba(102, 126, 234, 0);
            }
        }

        .tab-icon {
            width: 24px;
            height: 24px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            margin-right: 0.5rem;
        }

        .ui-demo {
            background: #1a1a2e;
            border-radius: 1rem;
            padding: 1.5rem;
            border: 2px solid #667eea;
            position: relative;
            overflow: hidden;
        }

        .ui-demo::before {
            content: '';
            position: absolute;
            top: -2px;
            left: -2px;
            right: -2px;
            bottom: -2px;
            background: var(--primary-gradient);
            border-radius: 1rem;
            z-index: -1;
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .ui-demo:hover::before {
            opacity: 1;
        }

        .tab-nav {
            display: flex;
            gap: 1rem;
            margin-bottom: 1.5rem;
            border-bottom: 2px solid rgba(255, 255, 255, 0.1);
        }

        .tab-btn {
            padding: 0.75rem 1.5rem;
            background: transparent;
            border: none;
            color: var(--text-secondary);
            cursor: pointer;
            border-radius: 0.5rem 0.5rem 0 0;
            transition: all 0.3s ease;
            position: relative;
        }

        .tab-btn.active {
            color: var(--text-primary);
            background: rgba(102, 126, 234, 0.2);
        }

        .tab-btn.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--primary-gradient);
        }

        .tab-content {
            display: none;
        }

        .tab-content.active {
            display: block;
        }

        .floating-element {
            animation: float 3s ease-in-out infinite;
        }

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

        .stats-number {
            font-size: 2.5rem;
            font-weight: bold;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .download-btn {
            background: var(--primary-gradient);
            color: white;
            padding: 1rem 2rem;
            border-radius: 2rem;
            text-decoration: none;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
        }

        .download-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
        }

        .feature-list li {
            list-style: none;
            padding: 0.5rem 0;
            padding-left: 1.5rem;
            position: relative;
        }

        .feature-list li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: #667eea;
            font-weight: bold;
        }

        .tinder-screenshot {
            background: url('https://picsum.photos/seed/tinder/600/400') center/cover;
            border-radius: 1rem;
            height: 300px;
            position: relative;
            overflow: hidden;
        }

        .screenshot-overlay {
            position: absolute;
            inset: 0;
            background: rgba(15, 15, 30, 0.8);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-direction: column;
            gap: 1rem;
        }

        .screenshot-badge {
            background: var(--primary-gradient);
            padding: 0.5rem 1.5rem;
            border-radius: 2rem;
            font-weight: 600;
            animation: pulse 2s infinite;
        }

        @media (max-width: 768px) {
            .tab-nav {
                overflow-x: auto;
                -webkit-overflow-scrolling: touch;
                scrollbar-width: none;
                -ms-overflow-style: none;
            }
            
            .tab-nav::-webkit-scrollbar {
                display: none;
            }
        }