:root {
  --bg: #0f1419;
  --surface: #1a2332;
  --surface2: #121a26;
  --text: #e7ecf3;
  --muted: #8b9bb4;
  --accent: #3d9cf5;
  --warn: #f5a623;
  --danger: #e85d5d;
  --ok: #3ddc97;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.45;
}

.header {
  padding: 1.35rem 1.4rem 1.2rem;
  border-bottom: 1px solid #2a3545;
}

.site-title {
  margin: 0 0 0.35rem;
  font-size: clamp(1.85rem, 4.5vw, 2.5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text);
}

.sub, .status { margin: 0; color: var(--muted); font-size: 0.95rem; }
.sub { font-size: 1rem; }
.status { margin-top: 0.55rem; color: var(--accent); }

.refresh-countdown {
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  color: var(--accent);
}

.layout {
  padding: 1.2rem 1.4rem 2rem;
  max-width: 1300px;
  margin: 0 auto;
}

.panel {
  background: var(--surface);
  border-radius: 12px;
  padding: 1rem 1.1rem;
  border: 1px solid #2a3545;
  margin-bottom: 1rem;
}

.panel h2 { margin: 0 0 0.3rem; font-size: 1.02rem; }

.overview-analytics {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 0.8rem;
  margin-bottom: 0.9rem;
}

.overview-kpis {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.55rem;
}

.kpi-card {
  background: var(--surface2);
  border: 1px solid #2a3545;
  border-radius: 8px;
  padding: 0.6rem 0.7rem;
}

.kpi-card h4 {
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 600;
}

.kpi-card strong {
  display: block;
  margin-top: 0.35rem;
  font-size: 1rem;
}

.overview-pie-wrap {
  background: var(--surface2);
  border: 1px solid #2a3545;
  border-radius: 8px;
  padding: 0.55rem;
}

.overview-pie-wrap h3 {
  margin: 0 0 0.4rem;
  font-size: 0.8rem;
  color: var(--muted);
}

.overview-pie-wrap canvas {
  width: 100%;
  height: 180px;
  display: block;
}

.alerts-heading {
  margin: 0.35rem 0 0.4rem;
  font-size: 0.88rem;
  color: var(--muted);
  font-weight: 600;
}

.alerts-panel {
  display: grid;
  gap: 0.45rem;
  margin-bottom: 0.85rem;
}

.alerts-empty {
  margin: 0;
  font-size: 0.82rem;
  color: var(--muted);
}

.alert-item {
  border: 1px solid rgba(232, 93, 93, 0.55);
  border-left: 4px solid var(--danger);
  background: rgba(232, 93, 93, 0.15);
  border-radius: 8px;
  padding: 0.5rem 0.6rem;
  font-size: 0.84rem;
}

.alert-item.ok {
  border: 1px solid rgba(61, 220, 151, 0.55);
  border-left: 4px solid var(--ok);
  background: rgba(61, 220, 151, 0.15);
}

.alert-item.warning {
  border: 1px solid rgba(245, 166, 35, 0.55);
  border-left: 4px solid var(--warn);
  background: rgba(245, 166, 35, 0.15);
}

.alert-item.critical {
  border: 1px solid rgba(232, 93, 93, 0.55);
  border-left: 4px solid var(--danger);
  background: rgba(232, 93, 93, 0.15);
}

.rack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 0.75rem;
}

.rack-card {
  text-align: left;
  background: var(--surface2);
  color: var(--text);
  border: 1px solid #2a3545;
  border-radius: 10px;
  padding: 0.85rem;
  cursor: pointer;
}

.rack-card.selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(61, 156, 245, 0.4) inset;
}

.rack-card.alert {
  border-color: rgba(232, 93, 93, 0.9);
  box-shadow: 0 0 18px rgba(232, 93, 93, 0.35), 0 0 0 1px rgba(232, 93, 93, 0.5) inset;
}

.rack-card.warning {
  border-color: rgba(245, 166, 35, 0.9);
  box-shadow: 0 0 16px rgba(245, 166, 35, 0.28), 0 0 0 1px rgba(245, 166, 35, 0.45) inset;
}

.rack-card.ok {
  border-color: rgba(61, 220, 151, 0.9);
  box-shadow: 0 0 14px rgba(61, 220, 151, 0.28), 0 0 0 1px rgba(61, 220, 151, 0.45) inset;
}

.rack-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.55rem;
}

.rack-card-header h3 {
  margin: 0;
  font-size: 1rem;
}

.rack-status-chip {
  flex-shrink: 0;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 0.22rem 0.5rem;
  border-radius: 999px;
  border: 1px solid;
}

.rack-status-chip--normal {
  color: #a8f3d1;
  border-color: rgba(61, 220, 151, 0.55);
  background: rgba(61, 220, 151, 0.12);
}

.rack-status-chip--warning {
  color: #ffdca5;
  border-color: rgba(245, 166, 35, 0.55);
  background: rgba(245, 166, 35, 0.12);
}

.rack-status-chip--critical {
  color: #ffc0c0;
  border-color: rgba(232, 93, 93, 0.55);
  background: rgba(232, 93, 93, 0.12);
}

.rack-card-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.4rem;
}

.rack-card-metrics > div {
  border: 1px solid #2a3545;
  border-radius: 7px;
  padding: 0.4rem;
  background: #101723;
  display: grid;
  gap: 0.15rem;
}

.rack-card-metrics span {
  font-size: 0.72rem;
  color: var(--muted);
}

.rack-card-metrics strong {
  font-size: 0.8rem;
  font-weight: 600;
}

.rack-card-fog {
  margin-top: 0.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.5rem;
  background: #101723;
  border: 1px solid #2a3545;
  border-radius: 7px;
  font-size: 0.78rem;
}

.rack-card-fog span {
  color: var(--muted);
}

.rack-card-fog strong {
  font-weight: 700;
}

.rack-card-note {
  margin: 0.55rem 0 0;
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.4;
}

.rack-stats {
  display: grid;
  gap: 0.45rem;
}

.rack-stats div {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: 0.84rem;
}

.rack-stats span { color: var(--muted); }
.rack-stats strong { font-weight: 600; }

.rack-metrics {
  margin-top: 0.65rem;
  border-top: 1px dashed #314157;
  padding-top: 0.6rem;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.35rem;
}

.rack-metrics div {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: 0.82rem;
}

.rack-metrics span { color: var(--muted); }
.rack-metrics strong { font-weight: 700; }

.rack-risk {
  margin: 0.7rem 0 0;
  font-size: 0.8rem;
  color: var(--muted);
}

.rack-card-actions {
  margin-top: 0.75rem;
  display: flex;
  justify-content: flex-end;
}

.details-btn {
  border: 1px solid #39516f;
  border-radius: 6px;
  background: #15253a;
  color: #c9d4e5;
  font-size: 0.76rem;
  padding: 0.35rem 0.52rem;
  cursor: pointer;
}

.details-btn:hover {
  border-color: var(--accent);
  color: #eef4ff;
}

.modal.hidden {
  display: none;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 40;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
}

.modal-content {
  position: relative;
  margin: 5vh auto 0;
  width: min(1020px, 96vw);
  max-height: 90vh;
  overflow: auto;
  background: var(--surface);
  border: 1px solid #30415a;
  border-radius: 12px;
  padding: 1rem;
}

.modal-open {
  overflow: hidden;
}

.modal-close {
  position: absolute;
  right: 0.7rem;
  top: 0.6rem;
  border: 1px solid #314157;
  background: var(--surface2);
  color: var(--text);
  border-radius: 6px;
  width: 30px;
  height: 30px;
  font-size: 1rem;
  cursor: pointer;
}

.modal-sub {
  margin: 0.25rem 0 0.75rem;
  color: var(--muted);
  font-size: 0.86rem;
}

.modal-body {
  display: grid;
  gap: 0.75rem;
}

.modal-section {
  background: var(--surface2);
  border: 1px solid #2a3545;
  border-radius: 8px;
  padding: 0.7rem;
}

.modal-section h4 {
  margin: 0 0 0.55rem;
  font-size: 0.88rem;
}

.modal-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}

.modal-table th,
.modal-table td {
  border-bottom: 1px solid #2a3545;
  padding: 0.42rem 0.3rem;
  text-align: left;
}

.modal-table th[scope="row"] {
  color: var(--muted);
  font-weight: 600;
  width: 42%;
}

.modal-hint-inline {
  color: var(--muted);
  font-size: 0.72rem;
}

.chip {
  display: inline-block;
  padding: 0.18rem 0.4rem;
  border-radius: 999px;
  font-size: 0.72rem;
  text-transform: uppercase;
}

.chip-ok {
  background: rgba(61, 220, 151, 0.16);
  border: 1px solid rgba(61, 220, 151, 0.55);
  color: #a8f3d1;
}

.chip-warning {
  background: rgba(245, 166, 35, 0.15);
  border: 1px solid rgba(245, 166, 35, 0.55);
  color: #ffdca5;
}

.chip-critical {
  background: rgba(232, 93, 93, 0.15);
  border: 1px solid rgba(232, 93, 93, 0.55);
  color: #ffc0c0;
}

.chip-muted {
  background: rgba(139, 155, 180, 0.14);
  border: 1px solid rgba(139, 155, 180, 0.45);
  color: #c9d4e5;
}

.modal-list {
  margin: 0.25rem 0 0;
  padding-left: 1.1rem;
}

.modal-list li {
  margin: 0.2rem 0;
}

.modal-ok {
  color: var(--ok);
  margin: 0;
}

.modal-loading {
  color: var(--muted);
  margin: 0;
}

.modal-section--visual h4 {
  margin-bottom: 0.5rem;
}

.modal-visual-row {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(280px, 1fr);
  gap: 1rem;
  align-items: stretch;
}

.modal-visual-row .overview-kpis {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.6rem;
  align-self: start;
}

.modal-visual-row .overview-kpis .kpi-card {
  min-height: 138px;
}

.modal-pie-wrap {
  background: #101723;
  border: 1px solid #2a3545;
  border-radius: 8px;
  padding: 0.5rem 0.6rem;
  text-align: center;
}

.modal-pie-wrap h5 {
  margin: 0 0 0.35rem;
  font-size: 0.75rem;
  color: var(--muted);
  font-weight: 600;
}

.modal-pie-wrap canvas {
  display: block;
  margin: 0 auto;
  max-width: 100%;
  height: auto;
}

.modal-pie-legend {
  margin: 0.35rem 0 0;
  font-size: 0.68rem;
  color: var(--muted);
  line-height: 1.35;
}

.modal-banners {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.modal-banner {
  border-radius: 8px;
  padding: 0.55rem 0.65rem;
  border: 1px solid #2a3545;
  display: grid;
  gap: 0.2rem;
  font-size: 0.82rem;
}

.modal-banner strong {
  font-size: 0.84rem;
}

.modal-banner span {
  color: var(--muted);
  font-size: 0.8rem;
}

.modal-banner--ok {
  border-color: rgba(61, 220, 151, 0.45);
  background: rgba(61, 220, 151, 0.1);
}

.modal-banner--warning {
  border-color: rgba(245, 166, 35, 0.55);
  background: rgba(245, 166, 35, 0.12);
}

.modal-banner--critical {
  border-color: rgba(232, 93, 93, 0.65);
  background: rgba(232, 93, 93, 0.14);
}

.modal-banner--risk {
  border-color: rgba(232, 93, 93, 0.45);
  background: rgba(232, 93, 93, 0.08);
}

.modal-section-hint {
  margin: 0 0 0.6rem;
  font-size: 0.75rem;
  color: var(--muted);
}

.modal-charts-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.65rem;
}

.modal-chart-box {
  background: #101723;
  border: 1px solid #2a3545;
  border-radius: 8px;
  padding: 0.55rem 0.6rem;
}

.modal-chart-box--primary {
  grid-column: 1 / -1;
}

.modal-chart-box h5 {
  margin: 0 0 0.4rem;
  font-size: 0.78rem;
  color: var(--muted);
  font-weight: 600;
}

.modal-chart-canvas {
  width: 100%;
  height: 150px;
  display: block;
}

.modal-chart-meta {
  margin-top: 0.35rem;
  font-size: 0.72rem;
  color: var(--muted);
  line-height: 1.35;
}

@media (max-width: 980px) {
  .overview-analytics {
    grid-template-columns: 1fr;
  }

  .layout {
    padding: 1rem 0.8rem 1.5rem;
  }

  .panel {
    padding: 0.8rem;
  }

  .modal-visual-row {
    grid-template-columns: 1fr;
  }

  .modal-visual-row .overview-kpis {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .modal-charts-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .header {
    padding: 1rem 0.9rem 0.9rem;
  }

  .site-title {
    font-size: clamp(1.4rem, 6vw, 1.8rem);
  }

  .rack-grid {
    grid-template-columns: 1fr;
  }

  .overview-kpis {
    grid-template-columns: 1fr;
  }

  .modal-content {
    margin: 2vh auto 0;
    width: 98vw;
    max-height: 96vh;
    padding: 0.75rem;
  }

  .modal-visual-row .overview-kpis {
    grid-template-columns: 1fr;
  }

  .modal-table {
    font-size: 0.76rem;
  }

  .modal-table th,
  .modal-table td {
    padding: 0.34rem 0.22rem;
  }

  .overview-trend-wrap {
    overflow-x: auto;
  }
}