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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            color: #333;
        }

        .app-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 20px;
            min-height: 100vh;
        }

        .header {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-radius: 20px;
            padding: 20px 30px;
            margin-bottom: 20px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }

        .header-main {
            flex: 1;
            min-width: 300px;
        }

        .header-nav {
            display: flex;
            gap: 15px;
            align-items: center;
            flex-wrap: wrap;
        }

        .nav-link {
            color: #667eea;
            text-decoration: none;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 8px;
            transition: all 0.3s ease;
            white-space: nowrap;
            font-size: 14px;
        }

        .nav-link:hover {
            background: rgba(102, 126, 234, 0.1);
            transform: translateY(-1px);
        }

        .nav-link:focus {
            outline: 2px solid #667eea;
            outline-offset: 2px;
        }

        .header h1 {
            font-size: 2.5rem;
            background: linear-gradient(45deg, #667eea, #764ba2);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 10px;
        }

        .header p {
            color: #666;
            font-size: 1.1rem;
        }

        .toolbar {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-radius: 15px;
            padding: 15px;
            margin-bottom: 20px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            align-items: center;
            justify-content: space-between;
        }

        .toolbar-group {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            align-items: center;
            padding: 5px 0;
            border-right: 1px solid rgba(102, 126, 234, 0.2);
            padding-right: 15px;
        }

        .toolbar-group:last-child {
            border-right: none;
            padding-right: 0;
        }

        .btn {
            background: linear-gradient(45deg, #667eea, #764ba2);
            color: white;
            border: none;
            padding: 8px 16px;
            border-radius: 8px;
            cursor: pointer;
            font-size: 14px;
            transition: all 0.3s ease;
            white-space: nowrap;
        }

        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
        }

        .btn.secondary {
            background: linear-gradient(45deg, #764ba2, #667eea);
        }

        .editor-container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            height: 70vh;
        }

        .editor-panel, .preview-panel {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-radius: 15px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.2);
            overflow: hidden;
        }

        .panel-header {
            background: rgba(102, 126, 234, 0.1);
            padding: 15px 20px;
            font-weight: 600;
            color: #333;
            border-bottom: 1px solid rgba(102, 126, 234, 0.2);
        }

        .editor {
            width: 100%;
            height: calc(100% - 60px);
            border: none;
            padding: 20px;
            font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
            font-size: 14px;
            line-height: 1.6;
            resize: none;
            outline: none;
            background: transparent;
            color: #333;
        }

        .preview {
            height: calc(100% - 60px);
            padding: 20px;
            overflow-y: auto;
            line-height: 1.7;
        }

        .preview h1, .preview h2, .preview h3 {
            margin-top: 24px;
            margin-bottom: 16px;
            color: #333;
        }

        .preview h1 { font-size: 2rem; }
        .preview h2 { font-size: 1.5rem; }
        .preview h3 { font-size: 1.25rem; }

        .preview p {
            margin-bottom: 16px;
        }

        .preview code {
            background: #f6f8fa;
            padding: 2px 6px;
            border-radius: 4px;
            font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
            font-size: 0.9em;
        }

        .preview pre {
            background: #1e1e1e;
            padding: 16px;
            border-radius: 8px;
            overflow-x: auto;
            margin: 16px 0;
        }

        .preview pre code {
            background: none;
            padding: 0;
            color: #d4d4d4;
        }

        .preview blockquote {
            border-left: 4px solid #667eea;
            padding-left: 16px;
            margin: 16px 0;
            color: #666;
            font-style: italic;
        }

        .preview ul, .preview ol {
            padding-left: 24px;
            margin-bottom: 16px;
        }

        .preview li {
            margin-bottom: 4px;
        }

        .preview table {
            border-collapse: collapse;
            width: 100%;
            margin: 16px 0;
        }

        .preview th, .preview td {
            border: 1px solid #ddd;
            padding: 8px 12px;
            text-align: left;
        }

        .preview th {
            background: #f6f8fa;
            font-weight: 600;
        }

        .format-panel {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-radius: 15px;
            padding: 20px;
            margin-top: 20px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
        }

        .format-options {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 15px;
        }

        .format-btn {
            background: rgba(102, 126, 234, 0.1);
            border: 2px solid rgba(102, 126, 234, 0.3);
            padding: 15px;
            border-radius: 10px;
            cursor: pointer;
            transition: all 0.3s ease;
            text-align: center;
        }

        .format-btn:hover {
            background: rgba(102, 126, 234, 0.2);
            transform: translateY(-2px);
        }

        .format-btn.active {
            background: linear-gradient(45deg, #667eea, #764ba2);
            color: white;
            border-color: #667eea;
        }

        .stats {
            background: rgba(255, 255, 255, 0.9);
            padding: 10px 15px;
            border-radius: 8px;
            font-size: 12px;
            color: #666;
            margin-left: auto;
        }

        .stats-enhanced {
            background: rgba(255, 255, 255, 0.9);
            padding: 10px 15px;
            border-radius: 8px;
            font-size: 12px;
            color: #666;
            margin-left: auto;
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        .stats-enhanced span {
            white-space: nowrap;
        }

        /* Footer Styles */
        .footer {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-radius: 15px;
            margin-top: 30px;
            padding: 30px 20px 20px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
        }

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

        .footer-section h4 {
            color: #667eea;
            margin-bottom: 15px;
            font-size: 1.1rem;
            font-weight: 600;
        }

        .footer-section p {
            color: #666;
            font-size: 0.9rem;
            line-height: 1.5;
            margin-bottom: 15px;
        }

        .footer-stats {
            display: flex;
            flex-direction: column;
            gap: 5px;
        }

        .footer-stats span {
            color: #666;
            font-size: 0.85rem;
        }

        .footer-links-column {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-links-column a {
            color: #667eea;
            text-decoration: none;
            font-size: 0.9rem;
            transition: all 0.3s ease;
        }

        .footer-links-column a:hover {
            color: #764ba2;
            text-decoration: underline;
        }

        .social-links {
            display: flex;
            flex-direction: column;
            gap: 8px;
            margin-bottom: 12px;
        }

        .social-link {
            display: flex;
            align-items: center;
            gap: 8px;
            color: #667eea;
            text-decoration: none;
            font-size: 0.9rem;
            transition: all 0.3s ease;
            padding: 4px 0;
        }

        .social-link:hover {
            color: #764ba2;
            text-decoration: underline;
            transform: translateX(2px);
        }

        .social-link svg {
            flex-shrink: 0;
            width: 20px;
            height: 20px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(102, 126, 234, 0.1);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }

        .footer-legal {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-legal p {
            color: #666;
            font-size: 0.9rem;
            margin: 0;
        }

        .footer-content {
            color: #666;
        }

        .footer-links {
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
        }

        .footer-links a {
            color: #667eea;
            text-decoration: none;
            font-weight: 500;
            font-size: 0.9rem;
        }

        .footer-links a:hover {
            text-decoration: underline;
        }

        .usage-info {
            font-size: 12px;
            color: #888;
        }

        .usage-info strong {
            color: #667eea;
        }

        /* Modal Styles */
        .modal {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            backdrop-filter: blur(5px);
            display: flex;
            justify-content: center;
            align-items: center;
            z-index: 1000;
        }

        .modal-content {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-radius: 15px;
            padding: 0;
            max-width: 600px;
            width: 90%;
            max-height: 80vh;
            overflow: hidden;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .modal-header {
            padding: 20px 25px;
            border-bottom: 1px solid rgba(102, 126, 234, 0.2);
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: rgba(102, 126, 234, 0.1);
        }

        .modal-header h3 {
            margin: 0;
            color: #333;
            font-size: 1.2rem;
        }

        .modal-close {
            background: none;
            border: none;
            font-size: 24px;
            color: #666;
            cursor: pointer;
            padding: 0;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
        }

        .modal-close:hover {
            background: rgba(102, 126, 234, 0.2);
            color: #333;
        }

        .modal-body {
            padding: 25px;
            overflow-y: auto;
            max-height: calc(80vh - 80px);
        }

        /* Find & Replace Styles */
        .find-replace-form {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .form-group {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }

        .form-group label {
            min-width: 100px;
            color: #333;
            font-weight: 600;
        }

        .form-group input[type="text"] {
            flex: 1;
            min-width: 200px;
            padding: 8px 12px;
            border: 1px solid #ddd;
            border-radius: 6px;
            font-size: 14px;
        }

        .form-group input[type="text"]:focus {
            outline: none;
            border-color: #667eea;
            box-shadow: 0 0 0 2px rgba(102, 126, 234, 0.2);
        }

        .btn.small {
            padding: 6px 12px;
            font-size: 12px;
        }

        .find-options {
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
            margin-top: 10px;
        }

        .find-options label {
            display: flex;
            align-items: center;
            gap: 5px;
            color: #666;
            cursor: pointer;
        }

        .find-stats {
            color: #666;
            font-size: 12px;
            font-style: italic;
            margin-top: 10px;
        }

        /* Keyboard Shortcuts Styles */
        .shortcuts-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
        }

        .shortcuts-section h4 {
            color: #667eea;
            margin-bottom: 10px;
            padding-bottom: 5px;
            border-bottom: 1px solid rgba(102, 126, 234, 0.2);
        }

        .shortcut-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 5px 0;
        }

        .shortcut-key {
            background: #f5f5f5;
            padding: 3px 8px;
            border-radius: 4px;
            font-family: monospace;
            font-size: 12px;
            border: 1px solid #ddd;
        }

        .shortcut-desc {
            color: #666;
        }

        @media (max-width: 768px) {
            .editor-container {
                grid-template-columns: 1fr;
                height: auto;
            }
            
            .editor-panel, .preview-panel {
                height: 400px;
            }
            
            .toolbar {
                justify-content: center;
            }
            
            .stats {
                margin: 10px 0 0 0;
            }

            .social-links {
                display: grid;
                grid-template-columns: repeat(2, 1fr);
                gap: 6px;
            }

            .social-link {
                font-size: 0.85rem;
            }
        }

        .export-menu {
            position: relative;
            display: inline-block;
        }

        .export-dropdown {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            background: white;
            border-radius: 8px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
            min-width: 150px;
            z-index: 1000;
        }

        .export-dropdown.show {
            display: block;
        }

        .export-option {
            padding: 10px 15px;
            cursor: pointer;
            border-bottom: 1px solid #eee;
            transition: background 0.2s;
            outline: none;
        }

        .export-option:hover,
        .export-option:focus {
            background: #f5f5f5;
            outline: 2px solid #667eea;
            outline-offset: -2px;
        }

        .export-option:last-child {
            border-bottom: none;
        }

        /* Mobile Responsive Styles */
        @media (max-width: 768px) {
            .header-content {
                flex-direction: column;
                align-items: flex-start;
                gap: 15px;
            }

            .header-nav {
                width: 100%;
                justify-content: center;
                gap: 10px;
            }

            .nav-link {
                font-size: 13px;
                padding: 6px 12px;
            }

            .footer-main {
                grid-template-columns: 1fr;
                gap: 25px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 15px;
            }

            .footer-legal {
                width: 100%;
            }

            .footer-links {
                justify-content: center;
                width: 100%;
            }

            .usage-info {
                text-align: center;
                width: 100%;
            }
        }

        @media (max-width: 480px) {
            .header {
                padding: 15px 20px;
            }

            .header h1 {
                font-size: 2rem;
            }

            .nav-link {
                font-size: 12px;
                padding: 5px 10px;
            }

            .footer {
                padding: 20px 15px 15px;
            }

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

            .social-links {
                justify-content: center;
                grid-template-columns: repeat(2, 1fr);
                gap: 8px;
            }
        }