.fullscreen-center{display:flex;flex-direction:column;align-items:center;justify-content:center;width:100%;min-height:100vh;padding:30px 16px;box-sizing:border-box;background:#fff}.xml-box{width:100%;max-width:800px;background-color:#fff;padding:20px;box-shadow:0 0 10px rgba(0,0,0,.1);border-radius:8px}textarea{width:100%;height:200px;font-family:monospace;padding:10px;font-size:14px;border-radius:5px;border:1px solid #ccc;margin-bottom:10px;resize:vertical}button{padding:8px 16px;margin-bottom:20px;cursor:pointer;background-color:#007bff;color:#fff;border:none;border-radius:4px}pre{background-color:#f4f4f4;padding:15px;border-radius:6px;white-space:pre-wrap;word-break:break-word;text-align:left;overflow-x:auto}