body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            margin: 0;
            padding: 0;
            background-color: #f5f5f5;
            color: #000000;
            box-sizing: border-box;
        }
        
        .container {
            
            margin: 0 auto;
            background-color: white;
            padding: 20px;
            border-radius: 8px;
        }
        
        h1 {
            text-align: center;
            color: #2c3e50;
            margin-bottom: 30px;
        }
        
        .editor-container {
            display: flex;
            flex-direction: column;
            gap: 20px;
            margin-bottom: 20px;
        }
        
        @media (min-width: 768px) {
            .editor-container {
                flex-direction: row;
            }
        }
        
        .editor-box {
            flex: 1;
        }
        
        .editor-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            background-color: #3498db;
            color: white;
            padding: 10px 15px;
            border-radius: 5px 5px 0 0;
            font-weight: bold;
            font-size: 14px;
        }
        
        @media (min-width: 768px) {
            .editor-header {
                font-size: 16px;
                padding: 12px 20px;
            }
        }
        
        textarea {
            width: 100%;
            height: 300px;
            padding: 15px;
            border: 1px solid #ddd;
            border-radius: 0 0 5px 5px;
            font-family: 'Courier New', Courier, monospace;
            font-size: 14px;
            resize: vertical;
            box-sizing: border-box;
        }
        
        .action-buttons {
            display: flex;
            flex-direction: column;
            gap: 10px;
            margin: 10px 0 20px;
            width: 100%;
        }
        
        @media (min-width: 768px) {
            .action-buttons {
                width: auto;
            }
        }
        
        button {
            background-color: #2ecc71;
            color: white;
            border: none;
            padding: 10px 20px;
            font-size: 16px;
            border-radius: 5px;
            cursor: pointer;
            transition: all 0.3s;
            width: 100%;
        }
        
        @media (min-width: 768px) {
            button {
                width: auto;
            }
        }
        
        button:hover {
            background-color: #27ae60;
        }
        
        .copy-button {
            background-color: #3498db;
            opacity: 0.5;
            pointer-events: none;
        }
        
        .copy-button.active {
            opacity: 1;
            pointer-events: all;
        }
        
        .copy-button:hover {
            background-color: #2980b9;
        }
        
        .stats {
            text-align: center;
            margin-bottom: 20px;
            font-size: 14px;
            color: #7f8c8d;
        }
        
        .tab-container {
            display: flex;
            justify-content: center;
            margin-bottom: 20px;
        }
        
        .tab-button {
            padding: 10px 20px;
            background-color: #e0e0e0;
            border: none;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .tab-button.active {
            background-color: #3498db;
            color: white;
        }
        
        .tab-button:first-child {
            border-radius: 5px 0 0 5px;
        }
        
        .tab-button:last-child {
            border-radius: 0 5px 5px 0;
        }