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

        :root {
            --primary: #4F46E5;
            --primary-light: #818CF8;
            --telega-ans: #EFFDDE;
            --secondary: #10B981;
            --text: #1F2937;
            --text-light: #6B7280;
            --bg: #FFFFFF;
            --bg-light: #F9FAFB;
            --border: #E5E7EB;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
        }

        body {
            font-family: 'Inter', sans-serif;
            color: var(--text);
            background-color: var(--bg);
            line-height: 1.6;
        }

        h1, h2, h3, h4 {
            font-family: 'Montserrat', sans-serif;
            font-weight: 700;
            line-height: 1.2;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .btn {
            display: inline-block;
            padding: 12px 28px;
            background: linear-gradient(135deg, var(--primary) 0%, #7C3AED 100%);
            color: white;
            text-decoration: none;
            border-radius: 12px;
            font-weight: 600;
            font-size: 16px;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
            box-shadow: var(--shadow);
        }

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

        .btn-outline {
            background: transparent;
            border: 2px solid var(--primary);
            color: var(--primary);
            box-shadow: none;
        }

        .btn-outline:hover {
            background: var(--primary);
            color: white;
        }

        /* Header */
        header {
            padding: 20px 0;
            position: sticky;
            top: 0;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            z-index: 1000;
            border-bottom: 1px solid var(--border);
        }

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

        .logo {
            font-family: 'Montserrat', sans-serif;
            font-weight: 700;
            font-size: 24px;
            color: var(--primary);
            text-decoration: none;
        }

        .logo span {
            color: var(--secondary);
        }

        .nav-links {
            display: flex;
            gap: 16px;
        }

        .nav-links a {
            text-decoration: none;
        }

        /* Mobile menu */
        .mobile-menu-btn {
            display: none;
            width: 44px;
            height: 44px;
            background: var(--primary);
            border-radius: 8px;
            border: none;
            cursor: pointer;
            position: relative;
            align-items: center;
            justify-content: center;
        }

        .mobile-menu-btn span {
            display: block;
            width: 20px;
            height: 2px;
            background: white;
            position: absolute;
            transition: all 0.3s ease;
        }

        .mobile-menu-btn span:nth-child(1) {
            top: 12px;
        }

        .mobile-menu-btn span:nth-child(2) {
            top: 21px;
        }

        .mobile-menu-btn span:nth-child(3) {
            top: 30px;
        }

        .mobile-menu {
            position: fixed;
            top: 0;
            right: -300px;
            width: 280px;
            height: 100vh;
            background: white;
            box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
            z-index: 1001;
            transition: right 0.3s ease;
            padding: 80px 20px 20px;
        }

        .mobile-menu.active {
            right: 0;
        }

        .mobile-menu .close-btn {
            position: absolute;
            top: 20px;
            right: 20px;
            background: none;
            border: none;
            font-size: 24px;
            cursor: pointer;
            color: var(--text);
        }

        .mobile-menu a {
            display: block;
            padding: 16px 0;
            text-decoration: none;
            color: var(--text);
            font-weight: 600;
            font-size: 18px;
            border-bottom: 1px solid var(--border);
        }

        .mobile-menu a:hover {
            color: var(--primary);
        }

        .overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }

        .overlay.active {
            opacity: 1;
            visibility: visible;
        }

        /* Hero Section */
        .hero {
            padding: 80px 0 60px;
            background: linear-gradient(135deg, var(--bg-light) 0%, #FFFFFF 100%);
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -50px;
            right: -50px;
            width: 300px;
            height: 300px;
            background: linear-gradient(135deg, var(--primary-light) 0%, var(--secondary) 100%);
            border-radius: 50%;
            opacity: 0.1;
            z-index: 0;
        }

        .hero-content {
            position: relative;
            z-index: 1;
            max-width: 600px;
        }

        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 24px;
            color: var(--text);
        }

        .hero p {
            font-size: 1.25rem;
            color: var(--text-light);
            margin-bottom: 32px;
            max-width: 550px;
        }

        .hero-buttons {
            display: flex;
            gap: 16px;
            margin-top: 20px;
        }

        .hero-image {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .phone-mockup {
            width: 300px;
            height: 600px;
            background: white;
            border-radius: 40px;
            border: 8px solid #F3F4F6;
            box-shadow: var(--shadow-lg);
            margin: 0 auto;
            overflow: hidden;
            position: relative;
        }

        .phone-screen {
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 20px;
            color: white;
            background: url(../assets/images/bg.jpg);
            background-size: cover;
        }
        .chat-bubble {
            background: rgba(255, 255, 255, 0.9);
            color: var(--text);
            padding: 12px 16px;
            border-radius: 18px;
            margin-bottom: 12px;
            max-width: 80%;
            align-self: flex-start;
            font-size: 14px;
        }

        .chat-bubble.bot {
            background: var(--telega-ans);
            color: #333333;
            align-self: flex-end;
        }

        /* Features Section */
        .features {
            padding: 80px 0;
            background: var(--bg);
        }

        .section-title {
            text-align: center;
            margin-bottom: 60px;
        }

        .section-title h2 {
            font-size: 2.5rem;
            margin-bottom: 16px;
            color: var(--text);
        }

        .section-title p {
            color: var(--text-light);
            font-size: 1.125rem;
            max-width: 600px;
            margin: 0 auto;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 32px;
        }

        .feature-card {
            background: var(--bg);
            padding: 32px;
            border-radius: 20px;
            box-shadow: var(--shadow);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            text-align: center;
        }

        .feature-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
        }

        .feature-icon {
            width: 64px;
            height: 64px;
            background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 24px;
            color: white;
            font-size: 28px;
        }

        .feature-card h3 {
            font-size: 1.5rem;
            margin-bottom: 16px;
            color: var(--text);
        }

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

        /* Demo Section */
        .demo {
            padding: 80px 0;
            background: var(--bg-light);
        }

        .demo-content {
            display: flex;
            align-items: center;
            gap: 60px;
        }

        .demo-text {
            flex: 1;
        }

        .demo-text h2 {
            font-size: 2.5rem;
            margin-bottom: 24px;
        }

        .demo-text p {
            color: var(--text-light);
            margin-bottom: 24px;
            font-size: 1.125rem;
        }

        .demo-image {
            flex: 1;
            display: flex;
            justify-content: center;
        }

        /* CTA Section */
        .cta {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--primary) 0%, #7C3AED 100%);
            color: white;
            text-align: center;
        }

        .cta h2 {
            font-size: 2.5rem;
            margin-bottom: 24px;
            color: white;
        }

        .cta p {
            font-size: 1.25rem;
            margin-bottom: 32px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
            opacity: 0.9;
        }

        .cta .btn {
            background: white;
            color: var(--primary);
            font-weight: 700;
        }

        .cta .btn:hover {
            background: var(--bg-light);
        }

        /* Footer */
        footer {
            padding: 40px 0;
            background: var(--bg);
            border-top: 1px solid var(--border);
            text-align: center;
        }

        footer p {
            color: var(--text-light);
            font-size: 0.875rem;
        }

        /* Contact Section */
        .contact {
            padding: 80px 0;
            background: var(--bg);
        }

        .contact-content {
            max-width: 600px;
            margin: 0 auto;
            text-align: center;
        }

        .contact-content h2 {
            font-size: 2.5rem;
            margin-bottom: 24px;
        }

        .contact-content p {
            color: var(--text-light);
            margin-bottom: 32px;
            font-size: 1.125rem;
        }

        .contact-info {
            display: flex;
            flex-direction: column;
            gap: 16px;
            margin-top: 32px;
        }

        .contact-item {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            color: var(--text-light);
        }

        .contact-item strong {
            color: var(--text);
        }

        /* Responsive */
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            
            .mobile-menu-btn {
                display: flex;
            }
            
            .hero {
                text-align: center;
                padding: 60px 0 40px;
            }
            
            .hero-content {
                margin: 0 auto;
            }
            
            .hero h1 {
                font-size: 2.5rem;
            }
            
            .hero-buttons {
                justify-content: center;
            }
            
            .demo-content {
                flex-direction: column;
            }
            
            .phone-mockup {
                width: 250px;
                height: 500px;
            }
            
            .section-title h2 {
                font-size: 2rem;
            }
        }

        @media (max-width: 480px) {
            .hero h1 {
                font-size: 2rem;
            }
            
            .hero p {
                font-size: 1.125rem;
            }
            
            .hero-buttons {
                flex-direction: column;
                align-items: center;
            }
        }