:root{
  --bg:#0f1216; --panel:#171c22; --panel2:#1e242c; --line:#2a323c;
  --fg:#e6ebf2; --muted:#8b98a9; --accent:#4c8dff; --ok:#2ecc71;
  --warn:#f5a623; --err:#ff5c5c; --radius:10px;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);
  font:14px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.topbar{display:flex;justify-content:space-between;align-items:center;
  padding:12px 22px;background:var(--panel);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}
.brand{font-weight:600;letter-spacing:.3px}
.topbar nav{display:flex;gap:16px;align-items:center}
main{max-width:1180px;margin:0 auto;padding:24px 20px 60px}
h1{font-size:22px;margin:0 0 18px}
h2{font-size:15px;margin:0 0 14px;color:var(--muted);font-weight:600;
  text-transform:uppercase;letter-spacing:.6px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:18px;margin-bottom:18px}
.card.narrow{max-width:380px;margin:8vh auto}
label{display:block;margin-bottom:12px;font-size:13px;color:var(--muted)}
input,textarea,select{width:100%;margin-top:5px;padding:9px 11px;background:var(--panel2);
  border:1px solid var(--line);border-radius:7px;color:var(--fg);font:inherit}
input:focus,textarea:focus{outline:none;border-color:var(--accent)}
textarea{resize:vertical;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px}
button{font:inherit;cursor:pointer}
button.primary{background:var(--accent);color:#fff;border:none;padding:9px 20px;border-radius:7px;font-weight:500}
button.primary:hover{filter:brightness(1.08)}
button.link{background:none;border:none;color:var(--accent);padding:2px 4px;font-size:13px}
button.link.danger{color:var(--err)}
form.inline{display:inline}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:0 14px;align-items:end}
.grid .actions{grid-column:1/-1;margin-top:4px}
.actions{margin-top:6px}
.alert{padding:11px 14px;border-radius:8px;margin-bottom:16px;font-size:13px}
.alert.error{background:rgba(255,92,92,.12);border:1px solid rgba(255,92,92,.35);color:#ffb3b3}
.alert.ok{background:rgba(46,204,113,.12);border:1px solid rgba(46,204,113,.35);color:#a7e9c3}
.muted{color:var(--muted)}
.small{font-size:12px}
.tablewrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:13px}
th{text-align:left;color:var(--muted);font-weight:600;font-size:12px;text-transform:uppercase;
  letter-spacing:.4px;padding:8px 10px;border-bottom:1px solid var(--line)}
td{padding:10px;border-bottom:1px solid rgba(42,50,60,.6);vertical-align:top}
tr:last-child td{border-bottom:none}
.badge{display:inline-block;padding:2px 9px;border-radius:20px;font-size:12px;white-space:nowrap}
.badge.ok{background:rgba(46,204,113,.16);color:#7ee2a8}
.badge.warn{background:rgba(245,166,35,.16);color:#f7c56b}
.badge.err{background:rgba(255,92,92,.16);color:#ff9b9b}
.badge.off{background:rgba(139,152,169,.16);color:#aab6c5}
code.suburl{display:inline-block;background:var(--panel2);padding:4px 8px;border-radius:6px;
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;
  word-break:break-all;max-width:420px}
.ops{white-space:nowrap}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:14px;margin-bottom:18px}
.card.stat{margin:0}
.card.stat .label{color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.4px}
.card.stat .value{font-size:24px;font-weight:600;margin-top:6px}
.card.stat .value.small{font-size:16px}
.subrow{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:14px}
.qr{background:#fff;padding:10px;border-radius:8px;display:inline-block;line-height:0}
.qr img{width:190px;height:190px;display:block}
.foot{text-align:center;color:var(--muted);font-size:12px;padding:24px}