:root {
            --primary-blue: #3b82f6;
            --primary-pink: #ec4899;
            --light-bg: #ffffff;
            --dark-text: #1f2937;
            --gray-bg: #f9fafb;
            --card-bg: #ffffff;
            --border-color: #e5e7eb;
            --text-muted: #6b7280;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            background-color: var(--light-bg);
            color: var(--dark-text);
            line-height: 1.6;
        }

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

        /* Header Styles */
        header {
            background-color: var(--light-bg);
            padding: 15px 0;
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
        }

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

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.8rem;
            font-weight: 700;
        }

        .logo span:first-child {
            color: var(--primary-blue);
        }

        .logo span:last-child {
            color: var(--primary-pink);
        }

        nav ul {
            display: flex;
            list-style: none;
            gap: 25px;
        }

        nav a {
            color: var(--dark-text);
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s;
        }

        nav a:hover {
            color: var(--primary-pink);
        }

        .auth-buttons {
            display: flex;
            gap: 15px;
        }

        .btn {
            padding: 8px 20px;
            border-radius: 5px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            border: none;
        }

        .btn-login {
            background-color: transparent;
            color: var(--dark-text);
            border: 1px solid var(--border-color);
        }

        .btn-login:hover {
            background-color: var(--gray-bg);
        }

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

        .btn-primary:hover {
            background-color: #2563eb;
        }

        /* Hero Section */
        .hero {
            padding: 80px 0;
            background: linear-gradient(to bottom, #ffffff, #f8fafc);
            text-align: center;
        }

        .hero h1 {
            font-size: 3rem;
            margin-bottom: 20px;
            background: linear-gradient(to right, var(--primary-blue), var(--primary-pink));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .hero p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto 30px;
            color: var(--text-muted);
        }

        .hero-buttons {
            display: flex;
            justify-content: center;
            gap: 15px;
            margin-top: 30px;
        }

        .btn-large {
            padding: 12px 30px;
            font-size: 1.1rem;
        }

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

        .btn-pink:hover {
            background-color: #db2777;
        }

        /* TTS Converter Section */
        .tts-converter {
            background-color: var(--gray-bg);
            padding: 60px 0;
        }

        .converter-container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: start;
        }

        @media (max-width: 768px) {
            .converter-container {
                grid-template-columns: 1fr;
            }
        }

        .text-input-section {
            background-color: var(--card-bg);
            border-radius: 10px;
            padding: 25px;
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
        }

        .text-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 15px;
        }

        .char-count {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        textarea {
            width: 100%;
            height: 200px;
            background-color: white;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 15px;
            color: var(--dark-text);
            font-size: 1rem;
            resize: vertical;
            margin-bottom: 15px;
        }

        textarea:focus {
            outline: none;
            border-color: var(--primary-blue);
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
        }

        .text-actions {
            display: flex;
            justify-content: space-between;
        }

        .btn-clear {
            background-color: transparent;
            color: var(--text-muted);
            border: 1px solid var(--border-color);
        }

        .btn-clear:hover {
            background-color: var(--gray-bg);
        }

        .voice-controls {
            background-color: var(--card-bg);
            border-radius: 10px;
            padding: 25px;
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
        }

        .control-group {
            margin-bottom: 20px;
        }

        .control-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
        }

        select {
            width: 100%;
            padding: 12px;
            background-color: white;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            color: var(--dark-text);
            font-size: 1rem;
        }

        select:focus {
            outline: none;
            border-color: var(--primary-blue);
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
        }

        .btn-generate {
            width: 100%;
            padding: 15px;
            font-size: 1.1rem;
            margin-top: 10px;
            background: linear-gradient(to right, var(--primary-blue), var(--primary-pink));
            color: white;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            transition: opacity 0.3s;
        }

        .btn-generate:hover {
            opacity: 0.9;
        }

        .btn-download {
            width: 100%;
            padding: 15px;
            font-size: 1.1rem;
            background: linear-gradient(to right, #10b981, #059669);
            color: white;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            transition: opacity 0.3s;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .btn-download:hover {
            opacity: 0.9;
        }

        .btn-download:disabled {
            opacity: 0.5;
            cursor: not-allowed;
        }

        /* Features Section */
        .features {
            padding: 80px 0;
        }

        .section-title {
            text-align: center;
            margin-bottom: 50px;
            font-size: 2.2rem;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .feature-card {
            background-color: var(--card-bg);
            border-radius: 10px;
            padding: 30px;
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s, box-shadow 0.3s;
        }

        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
        }

        .feature-icon {
            font-size: 2.5rem;
            margin-bottom: 20px;
            color: var(--primary-blue);
        }

        .feature-card h3 {
            margin-bottom: 15px;
            font-size: 1.4rem;
        }

        /* Languages Section */
        .languages {
            padding: 80px 0;
            background-color: var(--gray-bg);
        }

        .languages-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
        }

        .language-item {
            display: flex;
            align-items: center;
            gap: 15px;
            padding: 15px;
            background-color: var(--card-bg);
            border-radius: 8px;
            transition: background-color 0.3s;
            border: 1px solid var(--border-color);
        }

        .language-item:hover {
            background-color: #f3f4f6;
        }

        .flag {
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background-color: #e5e7eb;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* Testimonials */
        .testimonials {
            padding: 80px 0;
        }

        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .testimonial-card {
            background-color: var(--card-bg);
            border-radius: 10px;
            padding: 30px;
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
        }

        .testimonial-text {
            font-style: italic;
            margin-bottom: 20px;
            position: relative;
            color: var(--dark-text);
        }

        .testimonial-text::before {
            content: """;
            font-size: 3rem;
            color: var(--primary-pink);
            position: absolute;
            top: -20px;
            left: -10px;
            opacity: 0.3;
        }

        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .avatar {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: linear-gradient(to right, var(--primary-blue), var(--primary-pink));
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: bold;
        }

        /* FAQ Section */
        .faq {
            padding: 80px 0;
            background-color: var(--gray-bg);
        }

        .faq-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
            gap: 20px;
        }

        .faq-item {
            background-color: var(--card-bg);
            border-radius: 8px;
            padding: 20px;
            border: 1px solid var(--border-color);
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
        }

        .faq-question {
            font-weight: 600;
            margin-bottom: 10px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            color: var(--dark-text);
        }

        .faq-answer {
            color: var(--text-muted);
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            padding: 0 10px;
        }

        .faq-item.active .faq-answer {
            max-height: 500px;
            padding: 15px 10px;
        }

        /* Footer */
        footer {
            background-color: #f8fafc;
            padding: 60px 0 30px;
            border-top: 1px solid var(--border-color);
        }

        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-logo {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 15px;
        }

        .footer-logo span:first-child {
            color: var(--primary-blue);
        }

        .footer-logo span:last-child {
            color: var(--primary-pink);
        }

        .footer-links h3 {
            margin-bottom: 20px;
            font-size: 1.2rem;
        }

        .footer-links ul {
            list-style: none;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            color: var(--text-muted);
            text-decoration: none;
            transition: color 0.3s;
        }

        .footer-links a:hover {
            color: var(--primary-blue);
        }

        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid var(--border-color);
            color: var(--text-muted);
        }

        /* Mobile Menu */
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: var(--dark-text);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 8px 12px;
            transition: all 0.3s ease;
        }

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

        .mobile-menu-btn.active {
            color: var(--primary-blue);
        }

        .mobile-login {
            display: none;
        }

        /* Hide mobile auth on desktop */
        .mobile-auth-separator {
            display: none !important;
        }

        @media (max-width: 768px) {
            .mobile-menu-btn {
                display: flex;
                align-items: center;
                justify-content: center;
            }

            .mobile-login {
                display: block;
                margin-top: 15px;
                width: 100%;
            }

            nav ul {
                display: none;
                position: absolute;
                top: 60px;
                left: 0;
                right: 0;
                background-color: var(--light-bg);
                flex-direction: column;
                padding: 15px 20px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: 0 5px 10px rgba(0, 0, 0, 0.05);
                z-index: 1000;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.3s ease, padding 0.3s ease;
            }

            nav ul.active {
                display: flex;
                max-height: 500px;
                padding: 15px 20px;
            }

            nav ul li {
                padding: 10px 0;
                border-bottom: 1px solid var(--border-color);
            }

            nav ul li:last-child {
                border-bottom: none;
            }

            nav ul li a {
                display: block;
                padding: 8px 0;
            }

            /* Mobile auth buttons inside nav - show only on mobile */
            .mobile-auth-separator {
                display: block !important;
                border-top: 1px solid var(--border-color);
                padding-top: 15px;
                margin-top: 15px;
            }

            .mobile-auth-separator a {
                display: block;
                padding: 10px 0;
                margin-bottom: 5px;
            }

            .hero h1 {
                font-size: 2.2rem;
            }

            .hero-buttons {
                flex-direction: column;
                align-items: center;
            }

            .auth-buttons {
                display: none;
            }

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