:root{
  --bg:#0f1216;--card:#181c23;--fg:#e7ecf2;--sub:#7a8393;
  --ok:#3ddc84;--bad:#ff6a6a;--warn:#ffc857;--pri:#5b8cff;--pri2:#2a64ff;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Helvetica Neue",Helvetica,Arial,sans-serif}
a{color:var(--pri);text-decoration:none}
a:hover{text-decoration:underline}
code{background:#000;padding:0 4px;border-radius:3px}

/* login */
.login-body{display:flex;align-items:center;justify-content:center;min-height:100vh;background:linear-gradient(135deg,#0f1216,#1b2030)}
.card{background:var(--card);padding:32px 40px;border-radius:14px;box-shadow:0 10px 40px rgba(0,0,0,.5);min-width:360px;max-width:420px}
.card h1{margin:0 0 4px;font-size:22px}
.card .sub{color:var(--sub);margin:0 0 22px;font-size:13px}
.card label{display:block;margin:16px 0 6px;font-size:13px;color:var(--sub)}
.card input{width:100%;padding:12px 14px;border-radius:8px;border:1px solid #252b36;background:#0c0f14;color:var(--fg);font-size:18px;letter-spacing:4px;text-align:center;font-family:monospace}
.card button{margin-top:18px;width:100%;padding:12px;border:none;border-radius:8px;background:var(--pri2);color:#fff;font-weight:600;font-size:15px;cursor:pointer}
.card button:hover{background:var(--pri)}
.card .err{color:var(--bad);margin-top:12px;font-size:13px}
.card .footer{margin-top:18px;text-align:center;font-size:12px;color:var(--sub)}
.qr-block{background:#0c0f14;padding:18px;border-radius:10px;text-align:center;margin:12px 0}
.qr-block img{max-width:100%;border-radius:8px}
.mono-small{font-family:monospace;font-size:11px;color:var(--sub);word-break:break-all}

/* dashboard */
.topbar{display:flex;justify-content:space-between;align-items:center;padding:14px 22px;border-bottom:1px solid #22272f;background:var(--card)}
.topbar h1{margin:0;font-size:18px}
.logout{color:var(--sub);font-size:13px}
.dash{max-width:860px;margin:22px auto;padding:0 18px}
.panel{background:var(--card);border-radius:12px;padding:18px 22px;margin-bottom:16px}
.panel h2{margin:0 0 12px;font-size:15px;color:var(--sub);font-weight:500}
.status-table{width:100%;border-collapse:collapse}
.status-table th{text-align:left;color:var(--sub);font-weight:500;padding:6px 8px;width:140px;font-size:13px}
.status-table td{padding:6px 8px;font-size:14px}
.status-table tr:nth-child(odd){background:#0c0f14}
.ok{color:var(--ok)}.bad{color:var(--bad)}.warn{color:var(--warn)}
.hint{color:var(--sub);font-size:12px;margin:4px 0 10px}
.full{width:100%;margin:6px 0;padding:10px;border-radius:6px;border:1px solid #252b36;background:#0c0f14;color:var(--fg)}
.btn-row{display:flex;gap:10px;flex-wrap:wrap}
.btn-primary,.btn-secondary,.btn-danger{border:none;border-radius:8px;padding:10px 16px;font-size:14px;cursor:pointer;color:#fff;text-align:center;display:inline-block}
.btn-primary{background:var(--pri2)}.btn-primary:hover{background:var(--pri)}
.btn-secondary{background:#2d333f}.btn-secondary:hover{background:#3a424f}
.btn-danger{background:#b03a3a}.btn-danger:hover{background:#d14b4b}
.log{background:#0a0d11;padding:10px;border-radius:6px;font-size:12px;max-height:200px;overflow:auto;white-space:pre-wrap;color:#b5c0d0}
details summary{cursor:pointer;color:var(--pri);font-size:13px;margin-top:6px}