body{font-family:system-ui,sans-serif;background:#111;color:#eee;margin:0}main{max-width:760px;margin:0 auto;padding:24px}section{background:#1a1a1a;border-radius:8px;padding:16px;margin:16px 0}pre{white-space:pre-wrap;word-break:break-word;background:#000;padding:12px;border-radius:6px;max-height:320px;overflow:auto}label{display:block;margin:8px 0}input{margin-left:8px}button{margin-top:8px}.hint{color:#999;font-size:12px}