:root{color-scheme:dark}*{box-sizing:border-box}body{margin:0;font:15px/1.5 system-ui,sans-serif;background:#0b0d10;color:#e8eaed}header{padding:16px;border-bottom:1px solid #222;text-align:center}.wrap{max-width:560px;margin:30px auto;padding:0 16px}button.b{width:100%;padding:14px;margin:6px 0;border:1px solid #333;border-radius:10px;background:#15181d;color:#e8eaed;font-size:15px;cursor:pointer;text-align:left}.note{color:#9aa0a6;font-size:13px}.card{background:#fff;color:#111;border-radius:14px;padding:18px;margin:16px 0}#log{white-space:pre-wrap;font:12px monospace;color:#9fe;background:#000;padding:10px;border-radius:8px;min-height:40px}a{color:#8ab4f8}.f{height:52px;margin:6px 0}