:root{
  --bg:#0f172a; --panel:#1e293b; --panel2:#273449; --line:#334155;
  --text:#e2e8f0; --muted:#94a3b8; --accent:#38bdf8; --accent2:#0ea5e9;
  --ok:#22c55e; --warn:#f59e0b; --err:#ef4444; --radius:10px;
}
*{box-sizing:border-box}
body{margin:0;font:15px/1.5 system-ui,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text)}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.muted{color:var(--muted)}
.center{text-align:center}

/* Topbar */
.topbar{display:flex;align-items:center;gap:24px;padding:0 22px;height:58px;background:var(--panel);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}
.brand{font-weight:700;font-size:17px;color:var(--text);display:flex;align-items:center}
.brand span{color:var(--accent)}
.brand-logo{height:34px;width:auto;display:block}
.topbar nav{display:flex;gap:6px;flex:1}
.topbar nav a{padding:7px 12px;border-radius:8px;color:var(--muted)}
.topbar nav a:hover{background:var(--panel2);color:var(--text);text-decoration:none}
.topbar .user{display:flex;align-items:center;gap:12px;font-size:14px}
.inline{display:inline}
button.link{background:none;border:0;color:var(--accent);cursor:pointer;font:inherit;padding:0}

/* Layout */
.container{max-width:1100px;margin:26px auto;padding:0 20px}
.foot{text-align:center;color:var(--muted);padding:24px;font-size:13px}
h1{font-size:22px;margin:0 0 18px}
h2{font-size:17px;margin:0 0 12px}

/* Cards */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px;margin-bottom:24px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.card .num{font-size:30px;font-weight:700;color:var(--accent)}
.card .lbl{color:var(--muted);font-size:13px;text-transform:uppercase;letter-spacing:.5px}

/* Panel/table */
.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.panel-head{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;border-bottom:1px solid var(--line)}
table{width:100%;border-collapse:collapse}
th,td{text-align:left;padding:11px 18px;border-bottom:1px solid var(--line);font-size:14px}
th{color:var(--muted);font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.4px}
tr:last-child td{border-bottom:0}
tr:hover td{background:var(--panel2)}
.row-actions{display:flex;gap:6px;flex-wrap:wrap}

/* Badges */
.badge{display:inline-block;padding:2px 9px;border-radius:999px;font-size:12px;font-weight:600}
.badge.on{background:rgba(34,197,94,.15);color:#86efac}
.badge.off{background:rgba(239,68,68,.15);color:#fca5a5}
.role-admin{background:rgba(56,189,248,.18);color:#7dd3fc}
.role-operator{background:rgba(245,158,11,.16);color:#fcd34d}
.role-viewer{background:rgba(148,163,184,.18);color:#cbd5e1}

/* Buttons */
.btn{display:inline-block;padding:8px 14px;border-radius:8px;border:1px solid var(--line);background:var(--panel2);color:var(--text);cursor:pointer;font:inherit;font-size:14px}
.btn:hover{border-color:var(--accent);text-decoration:none}
.btn-primary{background:var(--accent2);border-color:var(--accent2);color:#04202e;font-weight:600}
.btn-primary:hover{background:var(--accent)}
.btn-danger{background:transparent;border-color:var(--err);color:#fca5a5}
.btn-danger:hover{background:rgba(239,68,68,.12)}
.btn-sm{padding:5px 9px;font-size:13px}

/* Forms */
form.card-form{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px;max-width:640px}
.field{margin-bottom:16px}
.field label{display:block;margin-bottom:6px;font-size:14px;color:var(--muted)}
.field input,.field select,.field textarea{width:100%;padding:9px 11px;background:var(--bg);border:1px solid var(--line);border-radius:8px;color:var(--text);font:inherit}
.field input:focus,.field select:focus{outline:none;border-color:var(--accent)}
.field .hint{font-size:12px;color:var(--muted);margin-top:4px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.actions{display:flex;gap:10px;margin-top:8px}

/* Flash */
.flash{padding:12px 16px;border-radius:8px;margin-bottom:16px;border:1px solid}
.flash-success{background:rgba(34,197,94,.1);border-color:rgba(34,197,94,.4);color:#bbf7d0}
.flash-warning{background:rgba(245,158,11,.1);border-color:rgba(245,158,11,.4);color:#fde68a}
.flash-error{background:rgba(239,68,68,.1);border-color:rgba(239,68,68,.4);color:#fecaca}
.errors{background:rgba(239,68,68,.08);border:1px solid rgba(239,68,68,.4);border-radius:8px;padding:12px 16px;margin-bottom:16px}
.errors li{color:#fecaca}

/* Login */
body.guest{display:flex;min-height:100vh;align-items:center;justify-content:center}
.login-wrap{width:360px;padding:20px}
.login-card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:30px}
.login-card h1{text-align:center;font-size:20px}
.login-logo-wrap{text-align:center;margin:0 0 24px}
.login-logo{width:240px;max-width:85%;height:auto;display:inline-block}
.toolbar{display:flex;gap:10px;align-items:center}
.search{flex:1;max-width:280px}
code{background:var(--bg);padding:1px 6px;border-radius:5px;font-size:13px}