:root{--bg:#0f1419;--surface:#1a2332;--border:#2d3a4f;--text:#e7ecf3;--muted:#8b9cb3;--primary:#3b82f6;--success:#22c55e;--warning:#eab308;--danger:#ef4444}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);line-height:1.5}a{color:var(--primary);text-decoration:none}.container{max-width:1100px;margin:0 auto;padding:24px 16px}.header{border-bottom:1px solid var(--border);background:var(--surface)}.header-inner{display:flex;align-items:center;justify-content:space-between;padding-top:16px;padding-bottom:16px}.logo{font-weight:700;font-size:1.25rem;color:var(--text)}nav a{margin-left:16px;color:var(--muted)}nav a:hover{color:var(--text)}.card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px;margin-bottom:16px}.btn{display:inline-block;padding:8px 16px;border-radius:8px;border:none;cursor:pointer;font-size:14px;background:var(--primary);color:#fff}.btn-secondary{background:transparent;border:1px solid var(--border);color:var(--text)}.btn-danger{background:var(--danger)}.badge{display:inline-block;padding:2px 10px;border-radius:999px;font-size:12px;font-weight:600}.badge-online{background:rgba(34,197,94,.2);color:var(--success)}.badge-offline{background:rgba(239,68,68,.2);color:var(--danger)}.badge-pending{background:rgba(234,179,8,.2);color:var(--warning)}.badge-other{background:rgba(139,156,179,.2);color:var(--muted)}table{width:100%;border-collapse:collapse}td,th{text-align:left;padding:12px 8px;border-bottom:1px solid var(--border)}th{color:var(--muted);font-weight:500;font-size:13px}.form-group{margin-bottom:16px}label{display:block;margin-bottom:6px;color:var(--muted);font-size:14px}input,select,textarea{width:100%;padding:10px 12px;border-radius:8px;border:1px solid var(--border);background:var(--bg);color:var(--text)}.grid-2{display:grid;grid-template-columns:1fr 1fr;grid-gap:16px;gap:16px}@media (max-width:768px){.grid-2{grid-template-columns:1fr}}.qr-box{text-align:center;padding:24px}.qr-box img{max-width:280px;border-radius:8px;background:#fff;padding:8px}.muted{color:var(--muted);font-size:14px}.actions{display:flex;gap:8px;flex-wrap:wrap}.page-title{margin:0 0 8px;font-size:1.75rem}.stats{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:16px;gap:16px;margin-bottom:24px}.stat-card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:16px}.stat-value{font-size:2rem;font-weight:700}.stat-label{color:var(--muted);font-size:14px}