:root {
  --bg: #0f1216;
  --panel: #171b21;
  --panel-2: #1e242c;
  --border: #2a323d;
  --text: #e6edf3;
  --text-muted: #8b98a8;
  --accent: #3b82f6;
  --ok: #22c55e;
  --warn: #f59e0b;
  --danger: #ef4444;
  --info: #38bdf8;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12.5px; }

/* ---------------- topbar ---------------- */
.topbar {
  display: flex; align-items: center; gap: 24px;
  padding: 12px 24px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 600; font-size: 15px; }
.brand a { color: var(--text); }
.brand-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--ok); box-shadow: 0 0 8px var(--ok);
}
.topbar nav { display: flex; gap: 18px; flex: 1; }
.topbar nav a { color: var(--text-muted); padding: 4px 0; }
.topbar nav a.active, .topbar nav a:hover { color: var(--text); text-decoration: none; }
.topbar nav a.active { border-bottom: 2px solid var(--accent); }
.user-area { display: flex; align-items: center; gap: 12px; color: var(--text-muted); }
.ws-status { color: var(--text-muted); font-size: 11px; }
.ws-status.live { color: var(--ok); }
.ws-status.down { color: var(--danger); }
.inline { display: inline; }

main { padding: 24px; max-width: 1400px; margin: 0 auto; }

/* ---------------- counters ---------------- */
.counters { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 22px; }
.counter {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 14px 20px; min-width: 120px;
}
.counter-value { display: block; font-size: 26px; font-weight: 600; }
.counter-label { color: var(--text-muted); font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
.counter.ok .counter-value { color: var(--ok); }
.counter.danger .counter-value { color: var(--danger); }
.counter.warn .counter-value { color: var(--warn); }
.counter.muted .counter-value { color: var(--text-muted); }

/* ---------------- grid de nós ---------------- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; }
.card {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 14px;
  border-left: 4px solid var(--border);
}
.card.status-online { border-left-color: var(--ok); }
.card.status-offline { border-left-color: var(--danger); }
.card.status-pending { border-left-color: var(--text-muted); }
.card header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.card-title { font-weight: 600; color: var(--text); }
.metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin-bottom: 12px; }
.metric { text-align: center; background: var(--panel-2); border-radius: 6px; padding: 8px 4px; }
.metric span { display: block; font-size: 10px; color: var(--text-muted); text-transform: uppercase; }
.metric strong { font-size: 15px; }
.metric.alarm strong { color: var(--danger); }
.card footer { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.seen { margin-left: auto; color: var(--text-muted); font-size: 11px; }

.badge { font-size: 11px; padding: 2px 8px; border-radius: 20px; text-transform: uppercase; }
.badge-online { background: rgba(34,197,94,.15); color: var(--ok); }
.badge-offline { background: rgba(239,68,68,.15); color: var(--danger); }
.badge-pending { background: rgba(139,152,168,.15); color: var(--text-muted); }

.chip { font-size: 11px; padding: 2px 8px; border-radius: 20px; background: var(--panel-2); color: var(--text-muted); }
.chip-ok { background: rgba(34,197,94,.15); color: var(--ok); }
.chip-danger { background: rgba(239,68,68,.15); color: var(--danger); }
.chip-muted { background: rgba(139,152,168,.15); color: var(--text-muted); }
.sev-critical { background: rgba(239,68,68,.15); color: var(--danger); }
.sev-warning { background: rgba(245,158,11,.15); color: var(--warn); }
.sev-info { background: rgba(56,189,248,.15); color: var(--info); }

/* ---------------- paineis ---------------- */
.panel {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px; margin-bottom: 18px;
}
.panel h1 { margin: 0 0 4px; font-size: 20px; }
.panel h2 { margin: 0 0 12px; font-size: 15px; color: var(--text-muted); text-transform: uppercase; letter-spacing: .04em; }
.panel-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.panel-actions { display: flex; gap: 8px; align-items: center; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 900px) { .two-col { grid-template-columns: 1fr; } }

.muted-text { color: var(--text-muted); font-size: 12.5px; }
.warn-text { color: var(--warn); font-size: 12.5px; }
.empty { color: var(--text-muted); text-align: center; padding: 20px; }
.hidden { display: none; }

/* ---------------- tabelas ---------------- */
.data-table { width: 100%; border-collapse: collapse; }
.data-table th {
  text-align: left; font-size: 11px; text-transform: uppercase;
  color: var(--text-muted); padding: 8px; border-bottom: 1px solid var(--border);
}
.data-table td { padding: 9px 8px; border-bottom: 1px solid var(--border); }
.data-table tr:last-child td { border-bottom: none; }
.row-warn { background: rgba(245,158,11,.06); }
.row-danger { background: rgba(239,68,68,.07); }
.row-disabled { opacity: .5; }
.actions { text-align: right; white-space: nowrap; }

.alert-list, .unit-list { list-style: none; padding: 0; margin: 0; }
.alert-list li {
  padding: 10px 12px; border-left: 3px solid var(--border);
  background: var(--panel-2); border-radius: 6px; margin-bottom: 8px;
  display: flex; gap: 10px; align-items: center; flex-wrap: wrap;
}
.alert-list li.sev-critical { border-left-color: var(--danger); }
.alert-list li.sev-warning { border-left-color: var(--warn); }
.alert-list li.sev-info { border-left-color: var(--info); }
.alert-list .when { margin-left: auto; color: var(--text-muted); font-size: 12px; }
.unit-list li { padding: 4px 0; }

/* ---------------- forms ---------------- */
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; margin: 16px 0; }
label { display: block; font-size: 12px; color: var(--text-muted); }
input, select {
  width: 100%; margin-top: 5px; padding: 8px 10px;
  background: var(--panel-2); border: 1px solid var(--border);
  border-radius: 6px; color: var(--text); font-size: 13px;
}
input:focus, select:focus { outline: none; border-color: var(--accent); }

button { cursor: pointer; font-family: inherit; font-size: 13px; }
.btn-primary {
  background: var(--accent); color: #fff; border: none;
  padding: 9px 16px; border-radius: 6px; font-weight: 500;
}
.btn-primary:hover { background: #2563eb; }
.btn-secondary {
  background: var(--panel-2); color: var(--text); border: 1px solid var(--border);
  padding: 8px 14px; border-radius: 6px;
}
.btn-secondary.active { border-color: var(--accent); color: var(--accent); }
.btn-link { background: none; border: none; color: var(--accent); padding: 2px 6px; }
.btn-link.danger { color: var(--danger); }
.form-error { color: var(--danger); font-size: 13px; }

.code-block {
  background: #0b0e12; border: 1px solid var(--border); border-radius: 6px;
  padding: 14px; overflow-x: auto; font-family: ui-monospace, Menlo, monospace;
  font-size: 12.5px; white-space: pre-wrap; word-break: break-all;
}

.alert-box { padding: 10px 12px; border-radius: 6px; margin-bottom: 14px; font-size: 13px; }
.alert-box.error { background: rgba(239,68,68,.12); color: #fca5a5; border: 1px solid rgba(239,68,68,.3); }

/* ---------------- login ---------------- */
.login-body { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-card {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 12px; padding: 32px; width: 340px;
}
.login-card h1 { font-size: 19px; margin: 0 0 4px; display: flex; align-items: center; gap: 8px; }
.login-card .subtitle { color: var(--text-muted); margin: 0 0 22px; font-size: 13px; }
.login-card label { margin-top: 12px; }
.login-card button { width: 100%; margin-top: 20px; }

canvas { max-width: 100%; }