.json-container {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
            margin-bottom: 20px;
        }
        .json-panel {
            background: #f8f9fa;
            border: 2px solid #e9ecef;
            border-radius: 6px;
            padding: 15px;
        }
        .json-panel h3 {
            margin: 0 0 10px 0;
            color: #007acc;
            font-size: 16px;
        }
        textarea {
            width: 97%;
            height: 300px;
            font-family: 'Courier New', monospace;
            font-size: 14px;
            border: 1px solid #ddd;
            border-radius: 4px;
            padding: 10px;
            resize: vertical;
        }
        .status {
            margin: 10px 0;
            padding: 8px 12px;
            border-radius: 4px;
            font-weight: bold;
        }
        .status.valid {
            background: #d4edda;
            color: #155724;
            border: 1px solid #c3e6cb;
        }
        .status.invalid {
            background: #f8d7da;
            color: #721c24;
            border: 1px solid #f5c6cb;
        }
        .controls {
            display: flex;
            gap: 10px;
            margin: 10px 0;
        }
        .btn {
            padding: 8px 16px;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-size: 14px;
        }
        .btn-primary {
            background: #007acc;
            color: white;
        }
        .btn-secondary {
            background: #6c757d;
            color: white;
        }
        .options {
            display: flex;
            gap: 15px;
            margin: 10px 0;
            align-items: center;
        }
        .option-group {
            display: flex;
            align-items: center;
            gap: 5px;
        }
        select, input[type="number"] {
            padding: 4px 8px;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-size: 14px;
        }