/* ============================================================
   SecureNet NOC — Unified Design System v3
   Industrial dark · IBM Plex · Cyan accent
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=IBM+Plex+Sans:wght@300;400;500;600;700&display=swap');

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg-0:  #060a0f;
  --bg-1:  #0c1219;
  --bg-2:  #111b26;
  --bg-3:  #162030;
  --bg-4:  #1c2a3e;

  --border-dim: rgba(0,200,220,0.05);
  --border:     rgba(0,200,220,0.11);
  --border-hi:  rgba(0,200,220,0.22);

  --tx-1: #e8f4f8;
  --tx-2: #8fb8cc;
  --tx-3: #4d7a96;
  --tx-4: #283d52;

  --cyan:      #00c8dc;
  --cyan-dim:  rgba(0,200,220,0.14);
  --blue:      #3b8eea;
  --blue-dim:  rgba(59,142,234,0.15);
  --green:     #0fe584;
  --green-dim: rgba(15,229,132,0.13);
  --yellow:    #f0b429;
  --yellow-dim:rgba(240,180,41,0.14);
  --red:       #ff3d5c;
  --red-dim:   rgba(255,61,92,0.13);
  --gray:      #3d5570;
  --gray-dim:  rgba(61,85,112,0.2);

  --font-sans: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Cascadia Code', 'Courier New', monospace;

  --sidebar-w: 238px;
  --radius: 6px;
  --radius-lg: 8px;
}

html, body {
  height: 100%;
  background: var(--bg-0);
  color: var(--tx-1);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--bg-4); border-radius: 3px; }

/* ── Layout ──────────────────────────────────────────────── */
body { display: flex; min-height: 100vh; }

.sidebar {
  width: var(--sidebar-w);
  background: var(--bg-1);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
  overflow-y: auto;
  z-index: 100;
}

.main-content {
  margin-left: var(--sidebar-w);
  flex: 1;
  min-height: 100vh;
  background: var(--bg-0);
  overflow-x: hidden;
}

/* ── Sidebar ─────────────────────────────────────────────── */
.sidebar-header {
  padding: 18px 14px 14px;
  border-bottom: 1px solid var(--border-dim);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 3px;
}

.sidebar-logo-icon {
  width: 26px; height: 26px;
  background: linear-gradient(135deg, var(--cyan) 0%, var(--blue) 100%);
  border-radius: 5px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}

.sidebar-logo-icon svg { width: 14px; height: 14px; color: #fff; fill: none; stroke: currentColor; stroke-width: 2; }

.sidebar-header h1 {
  font-size: 13px; font-weight: 700;
  letter-spacing: 0.08em; color: var(--tx-1);
  font-family: var(--font-mono); text-transform: uppercase;
}

.sidebar-header p {
  font-size: 9px; color: var(--tx-4);
  letter-spacing: 0.08em; text-transform: uppercase;
  padding-left: 36px;
}

.sidebar-nav { flex: 1; padding: 10px 8px; }
.nav-section { margin-bottom: 18px; }

.nav-section h3 {
  font-size: 9px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--tx-4); padding: 0 8px 5px;
  font-family: var(--font-mono);
}

.nav-item {
  display: flex; align-items: center; gap: 8px;
  padding: 7px 10px; border-radius: var(--radius);
  color: var(--tx-3); text-decoration: none;
  font-size: 12.5px; font-weight: 500;
  margin-bottom: 1px; transition: all 0.12s;
  border-left: 2px solid transparent;
}

.nav-item:hover { background: var(--cyan-dim); color: var(--tx-1); }

.nav-item.active {
  background: var(--cyan-dim); color: var(--cyan);
  border-left-color: var(--cyan);
}

.nav-item .icon {
  width: 16px; height: 16px; font-size: 13px;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}

.nav-item .badge {
  margin-left: auto;
  font-size: 8px; font-family: var(--font-mono);
  background: var(--bg-4); color: var(--tx-4);
  padding: 1px 5px; border-radius: 2px; letter-spacing: 0.05em;
}

.sidebar-footer {
  padding: 10px 12px;
  border-top: 1px solid var(--border-dim);
}

.user-info {
  display: flex; align-items: center;
  justify-content: space-between; margin-bottom: 7px;
}

#username {
  font-size: 12px; font-weight: 500;
  color: var(--tx-2); font-family: var(--font-mono);
}

.role-badge {
  font-size: 8px; font-family: var(--font-mono);
  text-transform: uppercase; letter-spacing: 0.08em;
  background: var(--cyan-dim); color: var(--cyan);
  padding: 2px 5px; border-radius: 2px;
}

.btn-logout {
  width: 100%; padding: 6px; background: transparent;
  border: 1px solid var(--border); border-radius: var(--radius);
  color: var(--tx-4); font-size: 11px; cursor: pointer;
  transition: all 0.12s; font-family: var(--font-sans);
}
.btn-logout:hover { border-color: var(--red); color: var(--red); background: var(--red-dim); }

/* ── Page header bar ─────────────────────────────────────── */
.dashboard-header {
  display: flex; align-items: center;
  justify-content: space-between;
  padding: 13px 20px;
  border-bottom: 1px solid var(--border-dim);
  background: var(--bg-1);
  position: sticky; top: 0; z-index: 50;
}

.dashboard-header h2 {
  font-size: 13px; font-weight: 700;
  color: var(--tx-1); font-family: var(--font-mono);
  text-transform: uppercase; letter-spacing: 0.07em;
}

.header-info { display: flex; align-items: center; gap: 14px; }

.last-updated {
  font-size: 10px; color: var(--tx-4); font-family: var(--font-mono);
}

.connection-status {
  display: flex; align-items: center; gap: 5px;
  font-size: 10px; color: var(--tx-3); font-family: var(--font-mono);
}

.status-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--green); box-shadow: 0 0 6px var(--green);
  animation: blink 2.5s ease-in-out infinite;
}

@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0.35} }

/* ── KPI row ─────────────────────────────────────────────── */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1px;
  background: var(--border);
  border-bottom: 1px solid var(--border);
  margin-bottom: 0;
}

.kpi-card {
  background: var(--bg-1);
  padding: 12px 14px;
  display: flex; align-items: center; gap: 10px;
  transition: background 0.12s;
  position: relative;
}

.kpi-card::after {
  content: '';
  position: absolute; bottom: 0; left: 0;
  height: 2px; width: 0;
  background: var(--cyan);
  transition: width 0.2s;
}
.kpi-card:hover::after { width: 100%; }
.kpi-card:hover { background: var(--bg-2); }

.kpi-card.warning  .kpi-value { color: var(--yellow); }
.kpi-card.critical .kpi-value { color: var(--red); }

.kpi-icon { font-size: 16px; opacity: 0.65; flex-shrink: 0; }

.kpi-label {
  font-size: 9px; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--tx-4);
  font-weight: 600; white-space: nowrap;
}

.kpi-value {
  font-size: 18px; font-weight: 700;
  color: var(--tx-1); font-family: var(--font-mono);
  line-height: 1; margin: 1px 0;
}

.kpi-subtitle {
  font-size: 9px; color: var(--tx-4); font-family: var(--font-mono);
}

/* ── Body / content areas ────────────────────────────────── */
.page-body { padding: 16px 20px; }

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 14px;
}

/* ── Panels ──────────────────────────────────────────────── */
.panel {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.panel-header {
  display: flex; align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-dim);
}

.panel-header h3 {
  font-size: 10px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.09em;
  color: var(--tx-3); font-family: var(--font-mono);
}

.panel-content { padding: 10px 14px; }
.panel-controls { display: flex; align-items: center; gap: 6px; }

.bandwidth-panel { grid-column: span 8; }
.alerts-panel    { grid-column: span 4; }

/* ── Form elements ───────────────────────────────────────── */
select, input[type="text"], input[type="number"], input[type="password"] {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--tx-1);
  font-size: 12px; font-family: var(--font-sans);
  padding: 6px 9px;
  transition: border-color 0.12s;
  outline: none;
}
select:focus, input:focus { border-color: var(--cyan); }
select option { background: var(--bg-2); }

/* ── Bandwidth stats ─────────────────────────────────────── */
.bandwidth-stats {
  padding: 6px 14px 10px;
  border-top: 1px solid var(--border-dim);
}

.stats-row {
  display: grid;
  grid-template-columns: 46px repeat(5, 1fr);
  gap: 4px; padding: 2px 0;
  font-family: var(--font-mono); font-size: 10.5px;
}

.stats-row:first-child { color: var(--tx-4); }
.stat-label { color: var(--tx-4); }
.stat-value { text-align: right; color: var(--tx-2); }

/* ── Alerts list (dashboard) ─────────────────────────────── */
.alerts-list {
  display: flex; flex-direction: column; gap: 3px;
  max-height: 340px; overflow-y: auto;
}

.alert-item {
  display: flex; align-items: flex-start; gap: 8px;
  padding: 7px 9px; border-radius: 4px;
  border-left: 2px solid transparent;
  background: var(--bg-2); font-size: 11px;
}

.alert-item.critical { border-color: var(--red);    background: rgba(255,61,92,0.05); }
.alert-item.warning  { border-color: var(--yellow);  background: rgba(240,180,41,0.05); }
.alert-item.ok       { border-color: var(--green);   background: rgba(15,229,132,0.05); }

.alert-dot {
  width: 6px; height: 6px; border-radius: 50%;
  flex-shrink: 0; margin-top: 4px;
}
.alert-item.critical .alert-dot { background: var(--red); }
.alert-item.warning  .alert-dot { background: var(--yellow); }
.alert-item.ok       .alert-dot { background: var(--green); }

.alert-device {
  font-weight: 600; color: var(--tx-1);
  font-family: var(--font-mono); font-size: 10.5px;
}
.alert-msg { color: var(--tx-3); font-size: 10.5px; line-height: 1.3; }
.alert-time { margin-left: auto; font-size: 9.5px; color: var(--tx-4); font-family: var(--font-mono); flex-shrink: 0; }

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  padding: 6px 13px; border-radius: var(--radius);
  border: 1px solid transparent;
  font-size: 11.5px; font-weight: 500;
  cursor: pointer; transition: all 0.12s;
  font-family: var(--font-sans);
  display: inline-flex; align-items: center; gap: 5px;
}

.btn-primary   { background: var(--cyan); color: var(--bg-0); border-color: var(--cyan); }
.btn-primary:hover { opacity: 0.82; }
.btn-secondary { background: var(--bg-3); color: var(--tx-2); border-color: var(--border); }
.btn-secondary:hover { border-color: var(--cyan); color: var(--cyan); }
.btn-success   { background: var(--green-dim); color: var(--green); border-color: rgba(15,229,132,0.3); }
.btn-success:hover { background: var(--green); color: var(--bg-0); }
.btn-danger    { background: var(--red-dim); color: var(--red); border-color: rgba(255,61,92,0.3); }
.btn-danger:hover { background: var(--red); color: #fff; }

.btn-refresh {
  padding: 5px 9px; background: var(--bg-3);
  border: 1px solid var(--border); border-radius: var(--radius);
  color: var(--tx-3); font-size: 11px; cursor: pointer;
  transition: all 0.12s;
}
.btn-refresh:hover { border-color: var(--cyan); color: var(--cyan); }

.btn-link {
  color: var(--cyan); text-decoration: none;
  font-size: 10.5px; font-family: var(--font-mono);
  opacity: 0.65; transition: opacity 0.12s;
}
.btn-link:hover { opacity: 1; }

/* ── Tables ──────────────────────────────────────────────── */
table { width: 100%; border-collapse: collapse; }

th {
  text-align: left; padding: 8px 11px;
  font-size: 9.5px; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--tx-4);
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono); white-space: nowrap; font-weight: 600;
}

th[data-sort] { cursor: pointer; user-select: none; }
th[data-sort]:hover { color: var(--cyan); }
th.sort-asc::after  { content: ' ↑'; color: var(--cyan); }
th.sort-desc::after { content: ' ↓'; color: var(--cyan); }

td {
  padding: 8px 11px;
  border-bottom: 1px solid var(--border-dim);
  font-size: 11.5px; color: var(--tx-2);
  vertical-align: middle;
}

tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(0,200,220,0.03); }
.mono { font-family: var(--font-mono); }

/* ── Status badges ───────────────────────────────────────── */
.status-badge {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 9.5px; font-family: var(--font-mono); font-weight: 600;
  padding: 2px 7px; border-radius: 3px;
  text-transform: uppercase; letter-spacing: 0.06em;
}
.status-badge::before {
  content: ''; width: 5px; height: 5px;
  border-radius: 50%; background: currentColor;
}
.status-online   { background: var(--green-dim);  color: var(--green); }
.status-offline  { background: var(--red-dim);    color: var(--red); }
.status-disabled { background: var(--gray-dim);   color: var(--gray); }
.status-up       { background: var(--green-dim);  color: var(--green); }
.status-down     { background: var(--red-dim);    color: var(--red); }
.status-unknown  { background: var(--gray-dim);   color: var(--gray); }

/* ── PON error badges ────────────────────────────────────── */
.error-warning  { color: var(--yellow); }
.error-critical { color: var(--red); }

.pon-error-badge {
  font-size: 9px; font-family: var(--font-mono); font-weight: 600;
  padding: 2px 6px; border-radius: 3px;
  text-transform: uppercase; letter-spacing: 0.05em;
}
.pon-sdber      { background: var(--red-dim);    color: var(--red); }
.pon-dying-gasp { background: var(--yellow-dim); color: var(--yellow); }
.pon-ok         { color: var(--tx-4); font-size: 9.5px; font-family: var(--font-mono); }

/* ── ONT stats grid ──────────────────────────────────────── */
.ont-stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1px; background: var(--border);
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  overflow: hidden; margin-bottom: 14px;
}

.stat-card {
  background: var(--bg-1); padding: 12px 14px;
  display: flex; align-items: center; gap: 10px;
}

.stat-card .stat-icon { font-size: 16px; opacity: 0.65; flex-shrink: 0; }
.stat-card .stat-label { font-size: 9.5px; text-transform: uppercase; letter-spacing: 0.07em; color: var(--tx-4); font-weight: 600; }
.stat-card .stat-value { font-size: 22px; font-weight: 700; color: var(--tx-1); font-family: var(--font-mono); line-height: 1; }
.stat-card .stat-subtitle { font-size: 9.5px; color: var(--tx-4); font-family: var(--font-mono); }

.stat-card.success .stat-value { color: var(--green); }
.stat-card.warning .stat-value { color: var(--yellow); }
.stat-card.critical .stat-value { color: var(--red); }

/* ONT controls */
.ont-controls {
  display: flex; align-items: center; gap: 8px;
  margin-bottom: 10px; flex-wrap: wrap;
}

.search-box input { width: 180px; }
.filter-group { display: flex; align-items: center; gap: 5px; }
.filter-group label { font-size: 10px; color: var(--tx-4); font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.06em; }

.ont-table-container { border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; }
.ont-table { width: 100%; }

/* ── Topology page ───────────────────────────────────────── */
.topology-map {
  background: var(--bg-1); border: 1px solid var(--border);
  border-radius: var(--radius-lg); overflow: hidden; margin-bottom: 14px;
}

.map-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 9px 14px; border-bottom: 1px solid var(--border-dim);
}

.map-title {
  font-size: 10px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.09em;
  color: var(--tx-3); font-family: var(--font-mono);
}

.map-hint { font-size: 9.5px; color: var(--tx-4); }

#topologySvg {
  width: 100%; height: 420px; display: block;
  background: radial-gradient(ellipse at 50% 50%, rgba(0,200,220,0.025) 0%, transparent 65%), var(--bg-0);
}

/* SVG topology styles */
.topo-link { stroke: var(--tx-4); stroke-width: 1.5; stroke-dasharray: 5 4; opacity: 0.4; }
.topo-link.linked { stroke: var(--green); stroke-width: 2; stroke-dasharray: none; opacity: 0.85; filter: drop-shadow(0 0 4px rgba(15,229,132,0.35)); }
.topo-link.down   { stroke: var(--red);   stroke-width: 2; stroke-dasharray: none; opacity: 0.9;  filter: drop-shadow(0 0 4px rgba(255,61,92,0.4)); }
.topo-link.unknown { stroke: var(--gray); stroke-width: 1.5; stroke-dasharray: 4 4; opacity: 0.3; }

.topo-node-circle { fill: var(--bg-3); stroke: var(--border-hi); stroke-width: 1.5; transition: all 0.2s; }
.topo-node-circle.connected { stroke: var(--cyan); filter: drop-shadow(0 0 5px rgba(0,200,220,0.28)); }
.topo-node-circle.down { fill: var(--red-dim); stroke: var(--red); }

.topo-node-text  { fill: var(--tx-2); font-size: 9.5px; text-anchor: middle; font-family: 'IBM Plex Mono', monospace; font-weight: 600; letter-spacing: 0.02em; }
.topo-node-count { fill: var(--tx-4); font-size: 7.5px;  text-anchor: middle; font-family: 'IBM Plex Mono', monospace; }

/* Topology stats */
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1px; background: var(--border);
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  overflow: hidden; margin-bottom: 12px;
}

.stats-grid .stat-card { display: block; text-align: center; padding: 10px 6px; }
.stats-grid .stat-value { font-size: 20px; font-weight: 800; color: var(--cyan); font-family: var(--font-mono); line-height: 1; text-align: center; }
.stats-grid .stat-value.stat-cyan  { color: var(--cyan); }
.stats-grid .stat-value.stat-green { color: var(--green); }
.stats-grid .stat-value.stat-amber { color: var(--yellow); }
.stats-grid .stat-label { font-size: 9px; color: var(--tx-4); text-transform: uppercase; letter-spacing: 0.09em; font-weight: 600; font-family: var(--font-mono); margin-top: 3px; }

/* Topology form */
.form-card { background: var(--bg-1); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 12px 14px; margin-bottom: 12px; }
.form-header { font-size: 9px; color: var(--tx-4); font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; font-family: var(--font-mono); margin-bottom: 9px; }
.form-row { display: flex; gap: 9px; align-items: flex-end; flex-wrap: wrap; }
.form-group { display: flex; flex-direction: column; gap: 4px; }
.form-group label { font-size: 10.5px; color: var(--tx-2); font-weight: 500; }

/* Tabs */
.tabs { display: flex; gap: 0; margin-bottom: 10px; border-bottom: 1px solid var(--border); }

.tab-btn {
  padding: 7px 14px; background: transparent; border: none;
  border-bottom: 2px solid transparent; margin-bottom: -1px;
  color: var(--tx-4); font-size: 11px; font-weight: 600;
  cursor: pointer; transition: all 0.12s;
  font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.07em;
}
.tab-btn:hover { color: var(--tx-1); }
.tab-btn.active { color: var(--cyan); border-bottom-color: var(--cyan); }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* Devices grid */
.devices-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 9px; }

.device-card { background: var(--bg-1); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; transition: border-color 0.12s; }
.device-card:hover { border-color: var(--border-hi); }

.device-card-header { display: flex; align-items: center; justify-content: space-between; padding: 9px 11px; background: var(--bg-2); border-bottom: 1px solid var(--border-dim); }
.device-card-name { font-size: 11.5px; font-weight: 600; font-family: var(--font-mono); color: var(--tx-1); }
.device-card-type { font-size: 8.5px; font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.07em; background: var(--cyan-dim); color: var(--cyan); padding: 2px 5px; border-radius: 3px; }
.device-card-ports { padding: 7px 10px; display: flex; flex-wrap: wrap; gap: 3px; }

.port-chip {
  width: 22px; height: 13px; border-radius: 2px;
  background: var(--bg-4); border: 1px solid var(--border);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 7.5px; font-family: var(--font-mono); color: var(--tx-4); cursor: default;
}
.port-chip.linked { background: var(--green-dim); border-color: rgba(15,229,132,0.3); color: var(--green); }

.device-card-footer { padding: 6px 10px; border-top: 1px solid var(--border-dim); display: flex; justify-content: flex-end; gap: 5px; }

/* Connection builder */
.connection-builder { display: flex; flex-direction: column; gap: 10px; }
.builder-card { background: var(--bg-1); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; }
.builder-header { display: flex; align-items: center; justify-content: space-between; padding: 8px 12px; background: var(--bg-2); border-bottom: 1px solid var(--border-dim); font-size: 10px; font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.08em; color: var(--tx-2); }
.builder-hint { color: var(--tx-4); font-size: 9.5px; }
.builder-form { padding: 10px 12px; }
.builder-row { display: flex; align-items: flex-end; gap: 8px; flex-wrap: wrap; margin-bottom: 7px; }
.builder-row:last-child { margin-bottom: 0; }
.builder-col { display: flex; flex-direction: column; gap: 3px; min-width: 110px; }
.builder-col label { font-size: 9.5px; color: var(--tx-4); font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.07em; }
.builder-col select, .builder-col input { min-width: 110px; }
.builder-col-grow { flex: 1; }
.builder-arrow { font-size: 14px; color: var(--cyan); padding-bottom: 5px; font-family: var(--font-mono); }

.connections-list { display: flex; flex-direction: column; gap: 3px; }

.connection-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 7px 11px; background: var(--bg-2);
  border: 1px solid var(--border); border-radius: 4px;
  font-size: 10.5px; font-family: var(--font-mono); color: var(--tx-2); gap: 8px;
}

.conn-status-dot { width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0; }
.conn-status-dot.up      { background: var(--green); box-shadow: 0 0 4px var(--green); }
.conn-status-dot.down    { background: var(--red);   box-shadow: 0 0 4px var(--red); }
.conn-status-dot.unknown { background: var(--gray); }

/* Save bar */
.save-bar { position: sticky; bottom: 0; background: var(--bg-2); border-top: 1px solid var(--yellow); padding: 9px 14px; z-index: 50; }
.save-bar-content { display: flex; align-items: center; justify-content: space-between; }
.save-bar span { font-size: 11px; font-family: var(--font-mono); color: var(--yellow); }

/* ── Alerts page ─────────────────────────────────────────── */
.alerts-toolbar { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

.filter-btn {
  padding: 4px 11px; border-radius: var(--radius);
  border: 1px solid var(--border); background: var(--bg-2);
  color: var(--tx-3); cursor: pointer; font-size: 10.5px;
  font-family: var(--font-mono); transition: all 0.12s;
  text-transform: uppercase; letter-spacing: 0.06em;
}
.filter-btn:hover { border-color: var(--cyan); color: var(--cyan); }
.filter-btn.active          { background: var(--cyan-dim);   border-color: var(--cyan);   color: var(--cyan); }
.filter-btn.active.warning  { background: var(--yellow-dim); border-color: var(--yellow); color: var(--yellow); }
.filter-btn.active.critical { background: var(--red-dim);    border-color: var(--red);    color: var(--red); }
.filter-btn.active.recovered{ background: var(--green-dim);  border-color: var(--green);  color: var(--green); }

.alerts-summary { display: flex; gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; margin-bottom: 14px; }

.summary-card { flex: 1; background: var(--bg-1); padding: 11px 14px; position: relative; }
.summary-card::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 2px; }
.summary-card.active::before   { background: var(--yellow); }
.summary-card.critical::before { background: var(--red); }
.summary-card.total::before    { background: var(--cyan); }

.summary-card .count { font-size: 24px; font-weight: 700; font-family: var(--font-mono); color: var(--tx-1); line-height: 1; }
.summary-card .label { font-size: 9.5px; color: var(--tx-4); text-transform: uppercase; letter-spacing: 0.07em; font-family: var(--font-mono); margin-top: 3px; }

.alert-table { width: 100%; border-collapse: collapse; }
.alert-table th { text-align: left; padding: 7px 11px; font-size: 9.5px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--tx-4); border-bottom: 1px solid var(--border); font-family: var(--font-mono); font-weight: 600; }
.alert-table td { padding: 9px 11px; border-bottom: 1px solid var(--border-dim); font-size: 11.5px; color: var(--tx-2); vertical-align: middle; }
.alert-table tr:hover td { background: var(--bg-2); }
.alert-table tr:last-child td { border-bottom: none; }

.severity-badge {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 9px; font-family: var(--font-mono); font-weight: 600;
  padding: 2px 6px; border-radius: 3px;
  text-transform: uppercase; letter-spacing: 0.06em;
}
.severity-badge::before { content: ''; width: 5px; height: 5px; border-radius: 50%; background: currentColor; }
.severity-badge.critical { background: var(--red-dim);    color: var(--red); }
.severity-badge.warning  { background: var(--yellow-dim); color: var(--yellow); }
.severity-badge.ok       { background: var(--green-dim);  color: var(--green); }

/* ── Device map ──────────────────────────────────────────── */
.device-map { display: flex; flex-wrap: wrap; gap: 3px; padding: 4px 0; min-height: 60px; align-content: flex-start; max-height: 320px; overflow-y: auto; }

.device-dot {
  width: 8px; height: 8px; border-radius: 2px;
  position: relative; cursor: pointer;
  flex-shrink: 0;
}
.device-dot:hover { z-index: 10; outline: 1px solid rgba(255,255,255,0.5); }
.device-dot.healthy  { background: var(--green, #0fe584); }
.device-dot.modest   { background: var(--yellow, #f0b429); }
.device-dot.critical { background: var(--red, #ff3d5c); }
.device-dot.offline  { background: var(--tx-5, #3a4f60); opacity: 0.6; }

.device-tooltip {
  display: none; position: fixed;
  background: var(--bg-1, #0a1929); color: var(--tx-2, #9ab);
  border: 1px solid var(--border, #1a3045); border-radius: 4px;
  padding: 5px 7px; font-size: 9.5px; font-family: var(--font-mono, monospace);
  line-height: 1.4; white-space: nowrap; z-index: 9999;
  box-shadow: 0 4px 12px rgba(0,0,0,0.5); pointer-events: none;
}


.device-node {
  display: flex; align-items: center; gap: 5px;
  padding: 4px 9px; border-radius: 3px;
  border: 1px solid var(--border); background: var(--bg-2);
  font-size: 10.5px; font-family: var(--font-mono);
  color: var(--tx-3); cursor: default; transition: border-color 0.12s;
}
.device-node.healthy  { border-color: rgba(15,229,132,0.3); }
.device-node.critical { border-color: rgba(255,61,92,0.3); }
.device-node.offline  { opacity: 0.35; }

.device-node-dot { width: 5px; height: 5px; border-radius: 50%; background: var(--gray); }
.device-node.healthy  .device-node-dot { background: var(--green); box-shadow: 0 0 4px var(--green); }
.device-node.critical .device-node-dot { background: var(--red); }

.legend { display: flex; gap: 10px; }
.legend-item { display: flex; align-items: center; gap: 4px; font-size: 10px; color: var(--tx-4); font-family: var(--font-mono); }
.dot { width: 7px; height: 7px; border-radius: 50%; }
.dot.healthy  { background: var(--green); }
.dot.modest   { background: var(--yellow); }
.dot.critical { background: var(--red); }
.dot.offline  { background: var(--gray); }

/* ── Login ───────────────────────────────────────────────── */
.login-wrap {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  background:
    radial-gradient(ellipse at 25% 15%, rgba(0,200,220,0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 75% 85%, rgba(59,142,234,0.05) 0%, transparent 50%),
    var(--bg-0);
}

.login-card {
  background: var(--bg-1); border: 1px solid var(--border);
  border-radius: 10px; padding: 28px; width: 100%; max-width: 360px;
}

.login-header { text-align: center; margin-bottom: 22px; }

.login-logo {
  width: 44px; height: 44px;
  background: linear-gradient(135deg, var(--cyan), var(--blue));
  border-radius: 10px; margin: 0 auto 11px;
  display: flex; align-items: center; justify-content: center;
}

.login-header h1 { font-size: 16px; font-weight: 700; font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.08em; color: var(--tx-1); margin-bottom: 3px; }
.login-header p  { font-size: 10px; color: var(--tx-4); text-transform: uppercase; letter-spacing: 0.09em; font-family: var(--font-mono); }

.login-form { display: flex; flex-direction: column; gap: 12px; }
.form-field { display: flex; flex-direction: column; gap: 4px; }
.form-field label { font-size: 9.5px; text-transform: uppercase; letter-spacing: 0.1em; color: var(--tx-4); font-family: var(--font-mono); font-weight: 600; }
.form-field input { width: 100%; padding: 9px 11px; font-size: 12.5px; }

.btn-login {
  width: 100%; padding: 9px;
  background: var(--cyan); color: var(--bg-0);
  border: none; border-radius: var(--radius);
  font-size: 12px; font-weight: 700; font-family: var(--font-mono);
  text-transform: uppercase; letter-spacing: 0.09em;
  cursor: pointer; transition: opacity 0.12s; margin-top: 3px;
}
.btn-login:hover { opacity: 0.82; }
.btn-login:disabled { opacity: 0.4; cursor: not-allowed; }

.login-error {
  padding: 7px 10px; background: var(--red-dim);
  border: 1px solid rgba(255,61,92,0.35); border-radius: var(--radius);
  color: var(--red); font-size: 11px; font-family: var(--font-mono); display: none;
}
.login-error.show { display: block; }

/* ── Page header ─────────────────────────────────────────── */
.page-header { display: flex; align-items: center; gap: 11px; margin-bottom: 16px; }
.header-icon { width: 32px; height: 32px; border-radius: 7px; background: linear-gradient(135deg, var(--cyan), var(--blue)); display: flex; align-items: center; justify-content: center; color: #fff; flex-shrink: 0; }
.header-text h1 { font-size: 16px; font-weight: 700; font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.05em; }
.header-text p  { font-size: 10.5px; color: var(--tx-4); margin-top: 1px; }

/* ── Container ───────────────────────────────────────────── */
.container { max-width: 1200px; margin: 0 auto; padding: 18px 20px; }

/* ── Loading ─────────────────────────────────────────────── */
.loading { text-align: center; color: var(--tx-4); font-size: 11px; font-family: var(--font-mono); padding: 18px; }

/* ── Misc ────────────────────────────────────────────────── */
.badge { font-size: 8.5px; font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.07em; background: var(--bg-4); color: var(--tx-4); padding: 1px 5px; border-radius: 2px; }

.span-12 { grid-column: span 12; }
.span-8  { grid-column: span 8; }
.span-6  { grid-column: span 6; }
.span-4  { grid-column: span 4; }

/* Responsive */
@media (max-width: 1200px) { .kpi-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 960px)  { .bandwidth-panel { grid-column: span 12; } .alerts-panel { grid-column: span 12; } }