:root {
            --primary: #20c997;
            --primary-dark: #1aa179;
            --secondary: #6c757d;
            --accent: #6f42c1;
            --light: #f8f9fa;
            --dark: #212529;
            --border: #dee2e6;
            --shadow: 0 4px 12px rgba(0,0,0,0.08);
            --transition: all 0.3s ease;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
        }
        
        body {
            background: linear-gradient(135deg, #f0f9ff 0%, #e6f7ff 100%);
            color: var(--dark);
            line-height: 1.6;
            min-height: 100vh;
            padding: 20px;
        }
        
        .container {
            max-width: 1000px;
            margin: 0 auto;
            background: white;
            border-radius: 20px;
            box-shadow: var(--shadow);
            overflow: hidden;
        }
        
        /* Header */
        .header {
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            color: white;
            padding: 2.5rem 2rem;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        
        .header::before {
            content: "💬";
            position: absolute;
            font-size: 15rem;
            opacity: 0.1;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
        }
        
        .header h1 {
            font-size: 2.8rem;
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 15px;
            position: relative;
            z-index: 1;
        }
        
        .header p {
            font-size: 1.2rem;
            opacity: 0.9;
            max-width: 700px;
            margin: 0 auto;
            position: relative;
            z-index: 1;
        }
        
        .stat-badge {
            display: inline-block;
            background: rgba(255,255,255,0.2);
            backdrop-filter: blur(10px);
            padding: 10px 25px;
            border-radius: 50px;
            margin-top: 1.5rem;
            font-weight: bold;
            border: 2px solid rgba(255,255,255,0.3);
            position: relative;
            z-index: 1;
        }
        
        /* Main Content */
        .main-content {
            padding: 2.5rem 2rem;
        }
        
        /* Generator Section */
        .generator-section {
            background: var(--light);
            border-radius: 15px;
            padding: 2rem;
            margin-bottom: 2.5rem;
            border: 2px solid var(--border);
        }
        
        .section-title {
            font-size: 1.8rem;
            margin-bottom: 1.5rem;
            color: var(--dark);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .section-title i {
            color: var(--primary);
        }
        
        /* Form */
        .caption-form {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
        }
        
        @media (min-width: 768px) {
            .caption-form {
                grid-template-columns: 1fr 1fr;
            }
        }
        
        .form-group {
            margin-bottom: 1.5rem;
        }
        
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--dark);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .label-icon {
            color: var(--primary);
        }
        
        input, textarea, select {
            width: 100%;
            padding: 14px 18px;
            border: 2px solid var(--border);
            border-radius: 10px;
            font-size: 1rem;
            transition: var(--transition);
        }
        
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(32, 201, 151, 0.1);
        }
        
        textarea {
            min-height: 150px;
            resize: vertical;
            line-height: 1.6;
        }
        
        /* Tone Selector */
        .tone-selector {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
            gap: 10px;
            margin-top: 0.5rem;
        }
        
        .tone-option {
            padding: 12px;
            border: 2px solid var(--border);
            border-radius: 8px;
            text-align: center;
            cursor: pointer;
            transition: var(--transition);
            background: white;
        }
        
        .tone-option:hover {
            border-color: var(--primary);
            transform: translateY(-2px);
        }
        
        .tone-option.active {
            border-color: var(--primary);
            background: var(--primary);
            color: white;
        }
        
        .tone-emoji {
            font-size: 1.5rem;
            margin-bottom: 5px;
        }
        
        /* CTA Selector */
        .cta-selector {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
            gap: 10px;
            margin-top: 0.5rem;
        }
        
        .cta-option {
            padding: 12px;
            border: 2px solid var(--border);
            border-radius: 8px;
            text-align: center;
            cursor: pointer;
            transition: var(--transition);
            background: white;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }
        
        .cta-option:hover {
            border-color: var(--accent);
            transform: translateY(-2px);
        }
        
        .cta-option.active {
            border-color: var(--accent);
            background: var(--accent);
            color: white;
        }
        
        /* Emoji Picker */
        .emoji-picker {
            background: white;
            border: 2px solid var(--border);
            border-radius: 10px;
            padding: 1rem;
            margin-top: 1rem;
        }
        
        .emoji-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(40px, 1fr));
            gap: 10px;
            margin-top: 0.5rem;
        }
        
        .emoji {
            font-size: 1.5rem;
            text-align: center;
            cursor: pointer;
            padding: 5px;
            border-radius: 5px;
            transition: var(--transition);
        }
        
        .emoji:hover {
            background: var(--light);
            transform: scale(1.2);
        }
        
        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 14px 28px;
            background: var(--primary);
            color: white;
            border: none;
            border-radius: 10px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
            margin: 5px;
        }
        
        .btn:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 15px rgba(32, 201, 151, 0.2);
        }
        
        .btn-secondary {
            background: var(--secondary);
        }
        
        .btn-secondary:hover {
            background: #5a6268;
        }
        
        .btn-accent {
            background: var(--accent);
        }
        
        .btn-accent:hover {
            background: #5a3796;
        }
        
        .btn-ai {
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            font-size: 1.1rem;
            padding: 16px 32px;
        }
        
        /* Results Section */
        .results-section {
            background: white;
            border-radius: 15px;
            padding: 2rem;
            margin-top: 2rem;
            border: 2px solid var(--border);
            display: none;
        }
        
        .results-section.active {
            display: block;
            animation: fadeIn 0.5s ease;
        }
        
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .caption-preview {
            background: var(--light);
            border-radius: 10px;
            padding: 2rem;
            margin: 1.5rem 0;
            border-left: 4px solid var(--primary);
            white-space: pre-line;
            line-height: 1.8;
            font-size: 1.05rem;
            min-height: 200px;
        }
        
        .caption-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            margin: 1.5rem 0;
            padding: 1.5rem;
            background: white;
            border-radius: 10px;
            border: 1px solid var(--border);
        }
        
        .stat-item {
            flex: 1;
            min-width: 150px;
            text-align: center;
            padding: 1rem;
        }
        
        .stat-value {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 0.5rem;
        }
        
        .stat-label {
            font-size: 0.9rem;
            color: var(--secondary);
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        
        /* Examples Section */
        .examples-section {
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            border-radius: 15px;
            padding: 2rem;
            margin: 2.5rem 0;
        }
        
        .examples-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 1.5rem;
            margin-top: 1.5rem;
        }
        
        .example-card {
            background: white;
            border-radius: 10px;
            padding: 1.5rem;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid transparent;
        }
        
        .example-card:hover {
            transform: translateY(-5px);
            border-color: var(--primary);
        }
        
        .example-tone {
            display: inline-block;
            padding: 4px 12px;
            background: var(--primary);
            color: white;
            border-radius: 50px;
            font-size: 0.8rem;
            margin-bottom: 1rem;
        }
        
        .example-caption {
            font-style: italic;
            color: var(--dark);
            line-height: 1.6;
            margin-bottom: 1rem;
            border-left: 3px solid var(--border);
            padding-left: 1rem;
        }
        
        .example-cta {
            color: var(--accent);
            font-weight: 600;
            margin-top: 1rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        /* Tips Section */
        .tips-section {
            background: white;
            border-radius: 15px;
            padding: 2rem;
            margin: 2rem 0;
            border: 2px solid var(--border);
        }
        
        .tip-item {
            display: flex;
            align-items: flex-start;
            gap: 15px;
            margin-bottom: 1.5rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px solid var(--border);
        }
        
        .tip-item:last-child {
            border-bottom: none;
            margin-bottom: 0;
            padding-bottom: 0;
        }
        
        .tip-icon {
            background: var(--primary);
            color: white;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        
        /* FAQ */
        .faq-section {
            margin: 3rem 0;
        }
        
        .faq-item {
            margin-bottom: 1rem;
            border: 1px solid var(--border);
            border-radius: 10px;
            overflow: hidden;
        }
        
        .faq-question {
            padding: 1.5rem;
            background: var(--light);
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 1.1rem;
        }
        
        .faq-answer {
            padding: 1.5rem;
            display: none;
            background: white;
        }
        
        .faq-item.active .faq-answer {
            display: block;
            animation: fadeIn 0.3s ease;
        }
        
        /* Footer */
        .footer {
            text-align: center;
            padding: 2rem;
            color: var(--secondary);
            border-top: 1px solid var(--border);
            margin-top: 2rem;
        }
        
        /* Loading Animation */
        .spinner {
            display: inline-block;
            width: 24px;
            height: 24px;
            border: 3px solid rgba(32, 201, 151, 0.3);
            border-radius: 50%;
            border-top-color: var(--primary);
            animation: spin 1s ease-in-out infinite;
        }
        
        @keyframes spin {
            to { transform: rotate(360deg); }
        }
        
        /* Responsive */
        @media (max-width: 768px) {
            .header h1 {
                font-size: 2.2rem;
                flex-direction: column;
                gap: 10px;
            }
            
            .main-content {
                padding: 1.5rem;
            }
            
            .generator-section {
                padding: 1.5rem;
            }
            
            .tone-selector, .cta-selector {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        
        /* Accessibility */
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }