body {
                font-family: sans-serif;
                margin: 20px;
            }

            #drop-zone {
                border: 2px dashed #999;
                border-radius: 8px;
                padding: 20px;
                text-align: center;
                color: #666;
                margin-bottom: 16px;
            }

            #drop-zone.dragover {
                border-color: #4CAF50;
                background: #f8fff8;
            }

            pre {
                background: #1e1e1e;
                color: #dcdcdc;
                padding: 12px;
                border-radius: 6px;
                white-space: pre-wrap;
                font-family: monospace;
            }

            textarea {
                width: 100%;
                height: 100px;
                margin-top: 8px;
                font-family: monospace;
            }