:root{--bg:#f6f7f9;--card:#fff;--fg:#1d2433;--muted:#667085;--line:#e4e7ec;--acc:#2563eb;--accfg:#fff;--err:#c0262d;--ok:#157f3c;--warn:#9a5b00}
@media (prefers-color-scheme:dark){:root{--bg:#0f141c;--card:#171e2a;--fg:#e6e9ef;--muted:#98a2b3;--line:#2a3343;--acc:#4f86ff;--accfg:#fff;--err:#ff6b6b;--ok:#46c37b;--warn:#f0b54a}}
*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--fg);font-size:15px}
.top{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 16px;background:var(--card);border-bottom:1px solid var(--line);flex-wrap:wrap}
.brand{font-weight:650}nav{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
main{max-width:1000px;margin:0 auto;padding:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:16px;margin-bottom:14px}.narrow{max-width:420px;margin:40px auto}
h2{margin:0 0 12px;font-size:18px}h3{margin:0 0 10px;font-size:16px}
label{display:flex;flex-direction:column;gap:4px;font-size:13px;color:var(--muted);margin-bottom:10px}label.row{flex-direction:row;align-items:center;gap:6px}
input,select,textarea{font:inherit;color:var(--fg);background:var(--bg);border:1px solid var(--line);border-radius:7px;padding:8px}
textarea{width:100%;resize:vertical}
button{font:inherit;background:var(--acc);color:var(--accfg);border:0;border-radius:7px;padding:8px 14px;cursor:pointer}button:disabled{opacity:.5;cursor:wait}
button.ghost{background:transparent;color:var(--fg);border:1px solid var(--line)}button.small{padding:3px 8px;font-size:12px}
.navbtn{background:transparent;color:var(--fg)}.navbtn.on{background:var(--acc);color:var(--accfg)}
.controls{display:flex;gap:10px;flex-wrap:wrap;align-items:flex-end;margin-bottom:10px}.controls label{margin-bottom:0}
.actions{display:flex;gap:10px;align-items:center;margin:10px 0}
.out{border:1px solid var(--line);border-radius:8px;padding:10px;margin-top:10px}.outhead{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}
.mono{white-space:pre-wrap;font-size:16px;line-height:1.55}#backText{white-space:pre-wrap;color:var(--muted)}
.muted{color:var(--muted)}.small{font-size:12px}.err{color:var(--err)}.ok{color:var(--ok)}.warn{color:var(--warn)}
.list{list-style:none;padding:0;margin:0}.list li{border-bottom:1px solid var(--line);padding:8px 0;display:flex;justify-content:space-between;gap:10px}
.tbl{width:100%;border-collapse:collapse;font-size:13px}.tbl th,.tbl td{border-bottom:1px solid var(--line);padding:6px;text-align:left;vertical-align:top}
.scroll{overflow-x:auto}#qr{width:200px;height:200px;background:#fff;padding:6px;border-radius:8px}
code{word-break:break-all}
@media (max-width:600px){main{padding:10px}.card{padding:12px}}
.w6{width:6em}