:root {
            --primary-bg: #0a0a0f;
            --secondary-bg: #1a1a2e;
            --accent-blue: #00d4ff;
            --accent-purple: #6366f1;
            --text-primary: #ffffff;
            --text-secondary: #a1a1aa;
            --glass-bg: rgba(255, 255, 255, 0.1);
            --glass-border: rgba(255, 255, 255, 0.2);
            --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.3);
            --gradient-primary: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
            --font-heading: 'Orbitron', monospace;
            --font-body: 'Inter', sans-serif;
        }

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

        body {
            font-family: var(--font-body);
            background: var(--primary-bg);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
            position: relative;
        }

        /* Animated Starry Background */
        .stars-bg {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            background: 
                radial-gradient(2px 2px at 20px 30px, #fff, transparent),
                radial-gradient(2px 2px at 40px 70px, rgba(255,255,255,0.8), transparent),
                radial-gradient(1px 1px at 90px 40px, #fff, transparent),
                radial-gradient(1px 1px at 130px 80px, rgba(255,255,255,0.6), transparent),
                radial-gradient(2px 2px at 160px 30px, #fff, transparent);
            background-repeat: repeat;
            background-size: 200px 100px;
            animation: twinkle 4s infinite;
        }

        @keyframes twinkle {
            0%, 100% { opacity: 0.8; }
            50% { opacity: 1; }
        }

        /* Individual star animation */
        .star {
            position: absolute;
            width: 2px;
            height: 2px;
            background-color: white;
            border-radius: 50%;
            opacity: 0.8;
            animation: twinkle 4s infinite;
        }

        /* Glass Card Styles */
        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: blur(20px);
            border: 1px solid var(--glass-border);
            border-radius: 20px;
            box-shadow: var(--shadow-glow);
            transition: all 0.3s ease;
        }

        .glass-card:hover {
            box-shadow: 0 0 40px rgba(0, 212, 255, 0.4);
            transform: translateY(-5px);
        }

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

        /* Header */
        .header {
            text-align: center;
            padding: 40px 0;
        }

        .logo {
            font-family: var(--font-heading);
            font-size: clamp(2.5rem, 5vw, 4rem);
            font-weight: 900;
            background: var(--gradient-primary);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: 0 0 30px rgba(0, 212, 255, 0.5);
            margin-bottom: 10px;
            animation: glow 2s ease-in-out infinite alternate;
        }

        @keyframes glow {
            from { filter: drop-shadow(0 0 10px rgba(0, 212, 255, 0.3)); }
            to { filter: drop-shadow(0 0 20px rgba(0, 212, 255, 0.6)); }
        }

        .tagline {
            font-size: clamp(1rem, 2vw, 1.2rem);
            color: var(--text-secondary);
            margin-bottom: 30px;
        }

        /* Main Content */
        .main-content {
            display: grid;
            grid-template-columns: 1fr;
            gap: 30px;
            padding-bottom: 50px;
        }

        @media (min-width: 768px) {
            .main-content {
                grid-template-columns: 1fr 1fr;
            }
        }

        /* Input Section */
        .input-section {
            padding: 30px;
        }

        .section-title {
            font-family: var(--font-heading);
            font-size: 1.5rem;
            margin-bottom: 20px;
            background: var(--gradient-primary);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

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

        .form-label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            color: var(--text-primary);
        }

        .form-input {
            width: 100%;
            padding: 15px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--glass-border);
            border-radius: 12px;
            color: var(--text-primary);
            font-family: inherit;
            font-size: 16px;
            transition: all 0.3s ease;
            backdrop-filter: blur(10px);
        }

        .form-input:focus {
            outline: none;
            border-color: var(--accent-blue);
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
        }

        textarea.form-input {
            min-height: 120px;
            resize: vertical;
        }

        .form-select {
            appearance: none;
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%23ffffff' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
            background-position: right 12px center;
            background-repeat: no-repeat;
            background-size: 16px;
            padding-right: 40px;
        }

        /* Popular Prompts */
        .popular-prompts {
            margin-bottom: 20px;
        }

        .prompt-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 10px;
        }

        .prompt-tag {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: 20px;
            padding: 6px 12px;
            font-size: 0.85rem;
            color: var(--text-secondary);
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .prompt-tag:hover {
            background: var(--accent-blue);
            color: var(--primary-bg);
            border-color: var(--accent-blue);
        }

        /* Advanced Options Toggle */
        .advanced-toggle {
            background: none;
            border: none;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 8px;
            cursor: pointer;
            padding: 0;
            font-size: 0.9rem;
            margin-bottom: 15px;
        }

        .advanced-toggle i.fa-chevron-down {
            transition: transform 0.3s ease;
        }

        .advanced-options {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            background: rgba(255, 255, 255, 0.03);
            border-radius: 10px;
            padding: 0 15px;
        }

        .advanced-options.expanded {
            max-height: 200px;
            padding: 15px;
            margin-bottom: 20px;
        }

        /* Generate Button */
        .generate-btn {
            width: 100%;
            padding: 15px 30px;
            background: var(--gradient-primary);
            border: none;
            border-radius: 12px;
            color: white;
            font-family: var(--font-heading);
            font-size: 1.1rem;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .generate-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(0, 212, 255, 0.4);
        }

        .generate-btn:disabled {
            opacity: 0.6;
            cursor: not-allowed;
        }

        .loading-spinner {
            display: none;
            width: 20px;
            height: 20px;
            border: 3px solid rgba(255, 255, 255, 0.3);
            border-radius: 50%;
            border-top-color: var(--text-primary);
            animation: spin 1s ease-in-out infinite;
            margin-right: 10px;
        }

        @keyframes spin {
            to { transform: rotate(360deg); }
        }

        /* Output Section */
        .output-section {
            padding: 30px;
            display: none;
        }

        .output-section.active {
            display: block;
        }

        .captions-grid {
            display: grid;
            gap: 15px;
        }

        .caption-card {
            padding: 20px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--glass-border);
            border-radius: 15px;
            position: relative;
            transition: all 0.3s ease;
        }

        .caption-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
            border-color: var(--accent-blue);
        }

        .caption-text {
            margin-bottom: 15px;
            line-height: 1.6;
            font-size: 1rem;
        }

        .caption-actions {
            display: flex;
            justify-content: flex-end;
            gap: 10px;
        }

        .action-btn {
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid var(--glass-border);
            color: var(--text-primary);
            padding: 8px 12px;
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            gap: 5px;
            font-size: 0.9rem;
        }

        .action-btn:hover {
            background: var(--accent-blue);
            color: var(--primary-bg);
        }

        .download-all-btn {
            margin-top: 20px;
            background: var(--gradient-primary);
            color: var(--text-primary);
            border: none;
            padding: 12px 20px;
            border-radius: 10px;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 500;
            width: 100%;
        }

        .download-all-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0, 212, 255, 0.4);
        }

        /* Features Section */
        .features-section {
            padding: 60px 0;
            text-align: center;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-top: 40px;
        }

        .feature-card {
            padding: 30px;
            text-align: center;
            transition: all 0.3s ease;
        }

        .feature-icon {
            font-size: 2.5rem;
            margin-bottom: 20px;
            background: var(--gradient-primary);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .feature-card h3 {
            font-family: var(--font-heading);
            font-size: 1.2rem;
            margin-bottom: 15px;
            color: var(--text-primary);
        }

        .feature-card p {
            color: var(--text-secondary);
            font-size: 0.95rem;
        }

        /* How It Works Section */
        .how-it-works-section {
            padding: 60px 0;
            text-align: center;
        }

        .steps-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 25px;
            margin-top: 40px;
        }

        .step {
            padding: 30px;
            text-align: center;
            position: relative;
        }

        .step-number {
            width: 40px;
            height: 40px;
            background: var(--gradient-primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-heading);
            font-weight: bold;
            margin: 0 auto 20px;
        }

        .step h3 {
            font-family: var(--font-heading);
            font-size: 1.1rem;
            margin-bottom: 10px;
            color: var(--text-primary);
        }

        .step p {
            color: var(--text-secondary);
            font-size: 0.9rem;
        }

        /* FAQ Section */
        .faq-section {
            padding: 60px 0;
        }

        .faq-container {
            margin-top: 40px;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .faq-item {
            overflow: hidden;
        }

        .faq-question {
            padding: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
        }

        .faq-question h3 {
            font-family: var(--font-heading);
            font-size: 1.1rem;
            color: var(--text-primary);
        }

        .faq-question i {
            transition: transform 0.3s ease;
        }

        .faq-answer {
            padding: 0 20px 20px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }

        .advanced-options.expanded {
            max-height: 200px;
        }

        .toggle-advanced {
            background: none;
            border: 1px solid var(--glass-border);
            color: var(--accent-blue);
            padding: 8px 16px;
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s ease;
            margin-bottom: 15px;
        }

        .faq-item.active .faq-answer {
            max-height: 200px;
        }

        /* Enhanced Footer */
        .footer {
            padding: 60px 0 20px;
            border-top: 1px solid var(--glass-border);
            margin-top: 50px;
        }

        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-logo {
            text-align: center;
        }

        .footer-logo h2 {
            font-family: var(--font-heading);
            font-size: 1.5rem;
            margin-bottom: 10px;
            color: var(--text-primary);
        }

        .footer-logo p {
            color: var(--text-secondary);
            font-size: 0.9rem;
        }

        .footer-links {
            text-align: center;
        }

        .footer-links h3 {
            font-family: var(--font-heading);
            font-size: 1.2rem;
            margin-bottom: 15px;
            color: var(--text-primary);
        }

        .footer-links ul {
            list-style: none;
            padding: 0;
        }

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

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

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

        .footer-contact {
            text-align: center;
        }

        .footer-contact h3 {
            font-family: var(--font-heading);
            font-size: 1.2rem;
            margin-bottom: 15px;
            color: var(--text-primary);
        }

        .footer-contact p {
            color: var(--text-secondary);
            font-size: 0.9rem;
        }

        .social-links {
            display: flex;
            justify-content: center;
            gap: 15px;
        }

        .social-link {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-primary);
            transition: all 0.3s ease;
        }

        .social-link:hover {
            background: var(--gradient-primary);
            color: var(--primary-bg);
            transform: translateY(-3px);
        }

        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid var(--glass-border);
            color: var(--text-secondary);
            font-size: 0.9rem;
        }

        /* Toast Notifications */
        #toastContainer {
            position: fixed;
            bottom: 20px;
            right: 20px;
            z-index: 1000;
        }

        .toast {
            background: var(--glass-bg);
            backdrop-filter: blur(10px);
            border: 1px solid var(--glass-border);
            border-radius: 10px;
            color: var(--text-primary);
            padding: 12px 20px;
            margin-top: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
            box-shadow: var(--shadow-glow);
            transform: translateX(120%);
            transition: transform 0.3s ease;
            max-width: 350px;
        }

        .toast.show {
            transform: translateX(0);
        }

        .toast i {
            font-size: 1.2rem;
        }

        .toast i.fa-check-circle {
            color: #4ade80;
        }

        .toast i.fa-exclamation-circle {
            color: #f87171;
        }

        /* Mobile Responsive */
        @media (max-width: 767px) {
            .container {
                padding: 0 15px;
            }
            
            .input-section,
            .output-section {
                padding: 20px;
            }
            
            .main-content {
                grid-template-columns: 1fr;
            }
        }

        /* Error States */
        .error-message {
            color: #f87171;
            font-size: 0.85rem;
            margin-top: 5px;
            display: none;
        }

        .form-input.error {
            border-color: #f87171;
        }

        /* Advanced Options Toggle */
        .advanced-toggle {
            width: 100%;
            padding: 12px;
            background: rgba(99, 102, 241, 0.1);
            border: 1px solid rgba(99, 102, 241, 0.2);
            border-radius: 10px;
            color: var(--text-primary);
            font-size: 0.95rem;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            transition: all 0.3s ease;
            margin-bottom: 15px;
        }

        .advanced-toggle:hover {
            background: rgba(99, 102, 241, 0.2);
        }

        .advanced-toggle i.fa-chevron-down {
            transition: transform 0.3s ease;
        }

        .advanced-options {
            display: none;
            animation: fadeIn 0.3s ease;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(-10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        /* Responsive Adjustments */
        @media (max-width: 768px) {
            .features-grid,
            .steps-container,
            .footer-content {
                grid-template-columns: 1fr;
            }
            
            .feature-card,
            .step {
                padding: 20px;
            }
            
            .section-title {
                font-size: 1.8rem;
            }
            
            .logo {
                font-size: 2.5rem;
            }
            
            .tagline {
                font-size: 1rem;
            }
        }

        @media (max-width: 480px) {
            .prompt-tags {
                gap: 8px;
            }
            
            .prompt-tag {
                padding: 4px 10px;
                font-size: 0.8rem;
            }
            
            .form-group {
                margin-bottom: 15px;
            }
            
            .form-label {
                font-size: 0.9rem;
            }
            
            .form-input {
                padding: 10px;
            }
            
            .generate-btn {
                padding: 12px;
            }
        }

        /* Fade-in animations for sections */
        .fade-in-section {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        
        .fade-in-section.visible {
            opacity: 1;
            transform: translateY(0);
        }
        
        /* Staggered animation for features and steps */
        .features-grid .feature-card,
        .steps-container .step {
            opacity: 1;
            transform: translateY(20px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        
        .features-grid.visible .feature-card,
        .steps-container.visible .step {
            opacity: 1;
            transform: translateY(0);
        }
        
        .features-grid.visible .feature-card:nth-child(1),
        .steps-container.visible .step:nth-child(1) {
            transition-delay: 0.1s;
        }
        
        .features-grid.visible .feature-card:nth-child(2),
        .steps-container.visible .step:nth-child(2) {
            transition-delay: 0.2s;
        }
        
        .features-grid.visible .feature-card:nth-child(3),
        .steps-container.visible .step:nth-child(3) {
            transition-delay: 0.3s;
        }
        
        .features-grid.visible .feature-card:nth-child(4),
        .steps-container.visible .step:nth-child(4) {
            transition-delay: 0.4s;
        }