/* ==========================================================================
   ASYMPTOTIC X LABS // BLACKGRID TPU MONITOR (EUROPE-WEST4)
   Clean Black, White, Red Design System using Helvetica Neue
   ========================================================================== */

:root {
  --bg-black: #050505;
  --surface-0: #0a0a0a;
  --surface-1: #111111;
  --surface-2: #181818;
  --surface-3: #222222;

  --border-subtle: #1e1e1e;
  --border-medium: #2a2a2a;
  --border-strong: #404040;

  --text-white: #ffffff;
  --text-primary: #f4f4f5;
  --text-secondary: #a1a1aa;
  --text-muted: #666666;
  --text-dim: #444444;

  --red-primary: #ff1e1e;
  --red-hover: #ff3b3b;
  --red-dark: #800f0f;
  --red-glow: rgba(255, 30, 30, 0.22);
  --red-subtle: rgba(255, 30, 30, 0.08);

  --font-helvetica: "Helvetica Neue", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", "Roboto Mono", Menlo, Monaco, Consolas, monospace;

  --transition-fast: 0.15s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html, body {
  background-color: var(--bg-black);
  color: var(--text-primary);
  font-family: var(--font-helvetica);
  font-size: 13px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Typography Helpers */
.mono {
  font-family: var(--font-mono);
  letter-spacing: -0.02em;
}

.text-white { color: var(--text-white) !important; }
.text-red { color: var(--red-primary) !important; }
.text-muted { color: var(--text-muted) !important; }

/* Top Navigation */
.top-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 28px;
  background-color: var(--surface-0);
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-mark {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-titles {
  display: flex;
  flex-direction: column;
}

.org-name {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--text-white);
  text-transform: uppercase;
}

.engine-name {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--red-primary);
}

.nav-center {
  display: flex;
  align-items: center;
}

.region-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  background-color: var(--surface-1);
  border: 1px solid var(--border-medium);
  padding: 6px 14px;
  border-radius: 2px;
}

.region-flag {
  font-size: 10px;
  font-weight: 800;
  background: var(--text-white);
  color: #000;
  padding: 1px 4px;
  border-radius: 1px;
}

.region-id {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--text-white);
}

.region-location {
  font-size: 11px;
  color: var(--text-muted);
  border-left: 1px solid var(--border-strong);
  padding-left: 8px;
  margin-left: 2px;
}

.pulse-indicator {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--red-primary);
  display: inline-block;
  box-shadow: 0 0 8px var(--red-primary);
  animation: pulse-glow 2s infinite ease-in-out;
}

@keyframes pulse-glow {
  0% { transform: scale(0.9); opacity: 0.7; box-shadow: 0 0 4px var(--red-primary); }
  50% { transform: scale(1.2); opacity: 1; box-shadow: 0 0 10px var(--red-primary); }
  100% { transform: scale(0.9); opacity: 0.7; box-shadow: 0 0 4px var(--red-primary); }
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 20px;
}

.time-display {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.time-display .label {
  font-size: 9px;
  color: var(--text-muted);
  letter-spacing: 0.08em;
}

.time-display .mono {
  font-size: 12px;
  color: var(--text-secondary);
}

.stream-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  background-color: var(--surface-1);
  border: 1px solid var(--border-medium);
  padding: 5px 10px;
  border-radius: 2px;
}

.stream-pill .pulse-dot {
  width: 6px;
  height: 6px;
  background-color: #ffffff;
  border-radius: 50%;
}

/* Main Content Area */
.main-content {
  flex: 1;
  max-width: 1480px;
  width: 100%;
  margin: 0 auto;
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* Cluster Hero Header */
.cluster-hero {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-subtle);
  gap: 24px;
}

.hero-left {
  max-width: 840px;
}

.cluster-tagline {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--red-primary);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.cluster-title {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-white);
  line-height: 1.1;
  margin-bottom: 8px;
}

.cluster-desc {
  font-size: 14px;
  font-weight: 400;
  color: var(--text-secondary);
  line-height: 1.5;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-shrink: 0;
}

/* Buttons */
.btn {
  font-family: var(--font-helvetica);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 10px 16px;
  border-radius: 2px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

.btn-primary {
  background-color: var(--red-primary);
  color: var(--text-white);
  border-color: var(--red-primary);
}

.btn-primary:hover {
  background-color: var(--red-hover);
  border-color: var(--red-hover);
}

.btn-outline {
  background-color: transparent;
  color: var(--text-primary);
  border-color: var(--border-strong);
}

.btn-outline:hover {
  background-color: var(--surface-2);
  color: var(--text-white);
  border-color: var(--text-white);
}

.btn-xs {
  font-size: 9px;
  padding: 4px 8px;
  background: var(--surface-2);
  color: var(--text-secondary);
  border: 1px solid var(--border-medium);
}

.btn-xs:hover {
  background: var(--surface-3);
  color: var(--text-white);
}

/* Key Metrics Grid */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}

.metric-card {
  background-color: var(--surface-0);
  border: 1px solid var(--border-subtle);
  padding: 18px;
  border-radius: 2px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 125px;
  transition: border-color var(--transition-fast);
}

.metric-card:hover {
  border-color: var(--border-medium);
}

.highlight-card {
  border-left: 2px solid var(--red-primary);
  background: linear-gradient(180deg, rgba(255, 30, 30, 0.04) 0%, var(--surface-0) 100%);
}

.metric-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.metric-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.red-label {
  color: var(--red-primary);
}

.metric-accent {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-secondary);
}

.metric-value-row {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 8px;
}

.metric-big {
  font-family: var(--font-helvetica);
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-white);
  line-height: 1;
}

.metric-unit {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

.metric-sub {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
}

.metric-meta {
  font-size: 11px;
  color: var(--text-secondary);
  font-weight: 400;
}

.metric-bar-wrap {
  width: 100%;
  height: 3px;
  background-color: var(--surface-3);
  margin-top: 8px;
  overflow: hidden;
}

.metric-bar {
  height: 100%;
  background-color: var(--red-primary);
  transition: width 0.4s ease;
}

.bar-white {
  background-color: var(--text-white);
}

/* Badges */
.badge {
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.08em;
  padding: 3px 6px;
  border-radius: 1px;
  text-transform: uppercase;
}

.badge-red {
  background-color: var(--red-primary);
  color: var(--text-white);
}

.badge-white {
  background-color: var(--text-white);
  color: #000;
}

.badge-subtle {
  background-color: var(--surface-2);
  color: var(--text-secondary);
  border: 1px solid var(--border-medium);
}

/* Zone Strip */
.zone-strip {
  background-color: var(--surface-0);
  border: 1px solid var(--border-subtle);
  padding: 16px 20px;
  border-radius: 2px;
}

.zone-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.zone-title {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--text-muted);
}

.zone-legend {
  display: flex;
  gap: 16px;
  font-size: 11px;
  color: var(--text-secondary);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.dot.active {
  background-color: var(--text-white);
  box-shadow: 0 0 5px rgba(255, 255, 255, 0.4);
}

.dot.inactive {
  background-color: transparent;
  border: 1px solid var(--border-strong);
}

.dot.red-pulse {
  background-color: var(--red-primary);
  box-shadow: 0 0 6px var(--red-primary);
}

.zones-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.zone-card {
  background-color: var(--surface-1);
  border: 1px solid var(--border-medium);
  padding: 14px 16px;
  border-radius: 2px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.zone-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.zone-name {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--text-white);
}

.zone-status-pill {
  font-size: 9px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 1px;
  letter-spacing: 0.06em;
}

.zone-nodes-summary {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.mini-node-chip {
  width: 14px;
  height: 14px;
  border-radius: 1px;
  background-color: var(--border-medium);
  transition: all var(--transition-fast);
  cursor: pointer;
  position: relative;
}

.mini-node-chip.active {
  background-color: var(--text-white);
}

.mini-node-chip.hot {
  background-color: var(--red-primary);
  box-shadow: 0 0 6px var(--red-glow);
}

.mini-node-chip.inactive {
  background-color: transparent;
  border: 1px dashed var(--border-strong);
}

.mini-node-chip:hover {
  transform: scale(1.3);
  z-index: 2;
}

.zone-stats-row {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-secondary);
  border-top: 1px solid var(--border-subtle);
  padding-top: 8px;
}

/* Toolbar & Filters */
.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  padding-bottom: 8px;
}

.filter-group {
  display: flex;
  gap: 4px;
  background-color: var(--surface-0);
  border: 1px solid var(--border-subtle);
  padding: 3px;
  border-radius: 2px;
}

.filter-tab {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-helvetica);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 7px 14px;
  cursor: pointer;
  transition: all var(--transition-fast);
  border-radius: 1px;
}

.filter-tab:hover {
  color: var(--text-white);
}

.filter-tab.active {
  background-color: var(--surface-2);
  color: var(--text-white);
  border-left: 2px solid var(--red-primary);
}

.filter-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

.select-wrapper {
  display: flex;
  align-items: center;
  gap: 8px;
  background-color: var(--surface-0);
  border: 1px solid var(--border-subtle);
  padding: 6px 12px;
  border-radius: 2px;
}

.select-wrapper label {
  font-size: 9px;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.1em;
}

.select-wrapper select {
  background: transparent;
  border: none;
  color: var(--text-white);
  font-family: var(--font-helvetica);
  font-size: 12px;
  font-weight: 500;
  outline: none;
  cursor: pointer;
}

.select-wrapper select option {
  background-color: var(--surface-1);
  color: var(--text-white);
}

.search-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.search-wrapper input {
  background-color: var(--surface-0);
  border: 1px solid var(--border-subtle);
  color: var(--text-white);
  font-family: var(--font-helvetica);
  font-size: 12px;
  padding: 8px 32px 8px 12px;
  border-radius: 2px;
  width: 240px;
  outline: none;
  transition: border-color var(--transition-fast), width var(--transition-smooth);
}

.search-wrapper input:focus {
  border-color: var(--text-white);
  width: 280px;
}

.clear-search {
  position: absolute;
  right: 8px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 11px;
  display: none;
}

/* Torus Matrix Grid Visualizer */
.torus-matrix-container {
  background-color: var(--surface-0);
  border: 1px solid var(--border-subtle);
  padding: 20px;
  border-radius: 2px;
}

.matrix-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 12px;
}

.matrix-title-wrap {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.matrix-tag {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--red-primary);
}

.matrix-subtitle {
  font-size: 12px;
  color: var(--text-secondary);
}

.matrix-hints {
  font-size: 11px;
  color: var(--text-muted);
}

.torus-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.torus-cell {
  background-color: var(--surface-1);
  border: 1px solid var(--border-medium);
  padding: 14px;
  border-radius: 2px;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.torus-cell:hover {
  border-color: var(--text-white);
  transform: translateY(-2px);
}

.torus-cell.active {
  border-left: 3px solid var(--red-primary);
}

.torus-cell.inactive {
  opacity: 0.6;
  border-style: dashed;
}

.cell-top-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.cell-id {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--text-white);
}

.cell-mesh {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
  padding: 1px 4px;
}

.cell-mid-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.cell-type {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
}

.cell-qps {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}

.cell-foot {
  display: flex;
  justify-content: space-between;
  font-size: 10px;
  color: var(--text-muted);
  border-top: 1px solid var(--border-subtle);
  padding-top: 6px;
}

/* Nodes Grid / Cards View */
.nodes-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.node-card {
  background-color: var(--surface-0);
  border: 1px solid var(--border-subtle);
  border-radius: 2px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: all var(--transition-fast);
}

.node-card:hover {
  border-color: var(--border-strong);
}

.node-card.active-card {
  border-top: 2px solid var(--text-white);
}

.node-card.inactive-card {
  border-top: 2px solid var(--border-strong);
  background-color: rgba(14, 14, 14, 0.7);
}

.node-card.hot-activity {
  border-top: 2px solid var(--red-primary);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 14px;
  gap: 12px;
}

.card-title-group {
  display: flex;
  flex-direction: column;
}

.card-node-name {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--text-white);
  letter-spacing: -0.01em;
}

.card-node-zone {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 2px;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.08em;
  padding: 4px 8px;
  border-radius: 1px;
}

.status-badge.active {
  background-color: var(--text-white);
  color: #000;
}

.status-badge.inactive {
  background-color: var(--surface-2);
  color: var(--text-muted);
  border: 1px solid var(--border-medium);
}

.status-badge.hot {
  background-color: var(--red-primary);
  color: var(--text-white);
  box-shadow: 0 0 10px var(--red-glow);
}

/* Card Specs Grid */
.card-specs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  background-color: var(--surface-1);
  border: 1px solid var(--border-subtle);
  padding: 12px;
  border-radius: 1px;
  margin-bottom: 14px;
}

.spec-item {
  display: flex;
  flex-direction: column;
}

.spec-label {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.spec-val {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 2px;
}

/* Card Telemetry Strip */
.card-telemetry {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 14px;
}

.telemetry-item {
  display: flex;
  flex-direction: column;
}

.telemetry-label {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.telemetry-val {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--text-white);
  margin-top: 2px;
}

.telemetry-val.highlight {
  color: var(--red-primary);
}

/* Shard Role Block */
.shard-role-block {
  background-color: var(--surface-1);
  border-left: 2px solid var(--border-strong);
  padding: 8px 10px;
  margin-bottom: 16px;
  border-radius: 1px;
}

.shard-role-block.active-shard {
  border-left-color: var(--red-primary);
}

.shard-title {
  font-size: 9px;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.shard-desc {
  font-size: 11px;
  color: var(--text-secondary);
  font-weight: 500;
  margin-top: 2px;
}

/* Card Actions */
.card-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

.card-actions-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Engine Activity Log Console */
.engine-log-section {
  background-color: var(--surface-0);
  border: 1px solid var(--border-subtle);
  border-radius: 2px;
  overflow: hidden;
}

.log-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 18px;
  background-color: var(--surface-1);
  border-bottom: 1px solid var(--border-subtle);
}

.log-title-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}

.log-mark {
  color: var(--red-primary);
  font-size: 10px;
}

.log-title {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: var(--text-white);
}

.log-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.log-status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--red-primary);
  animation: pulse-glow 1.5s infinite ease-in-out;
}

.log-status-text {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-muted);
}

.log-console {
  height: 140px;
  overflow-y: auto;
  padding: 12px 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
  background-color: #060606;
}

.log-line {
  display: flex;
  gap: 12px;
  color: var(--text-secondary);
}

.log-time {
  color: var(--text-dim);
  flex-shrink: 0;
}

.log-tag {
  color: var(--red-primary);
  font-weight: 700;
  flex-shrink: 0;
}

.log-tag.white {
  color: var(--text-white);
}

.log-msg {
  color: var(--text-primary);
  word-break: break-all;
}

/* Modal Drawer */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(4px);
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.modal-backdrop.open {
  display: flex;
}

.modal-card {
  background-color: var(--surface-0);
  border: 1px solid var(--border-medium);
  width: 100%;
  max-width: 680px;
  border-radius: 2px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.9);
  display: flex;
  flex-direction: column;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-subtle);
}

.modal-title-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
}

.modal-node-id {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--text-white);
}

.modal-close-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 16px;
  cursor: pointer;
  padding: 4px;
}

.modal-close-btn:hover {
  color: var(--text-white);
}

.modal-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-height: 70vh;
  overflow-y: auto;
}

.modal-section-title {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: var(--red-primary);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.modal-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.modal-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.modal-data-box {
  background-color: var(--surface-1);
  border: 1px solid var(--border-subtle);
  padding: 12px;
  border-radius: 1px;
}

.modal-data-label {
  font-size: 9px;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.08em;
}

.modal-data-val {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--text-white);
  margin-top: 4px;
}

.modal-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  border-top: 1px solid var(--border-subtle);
  background-color: var(--surface-1);
}

/* App Footer */
.app-footer {
  border-top: 1px solid var(--border-subtle);
  padding: 18px 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
  color: var(--text-muted);
  background-color: var(--surface-0);
  margin-top: auto;
}

.footer-brand {
  font-weight: 700;
  color: var(--text-white);
  letter-spacing: 0.08em;
}

.footer-sep {
  margin: 0 8px;
  color: var(--border-strong);
}

/* Responsive Breakpoints */
@media (max-width: 1200px) {
  .metrics-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .nodes-container {
    grid-template-columns: repeat(2, 1fr);
  }
  .torus-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .top-nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
  }
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .zones-container {
    grid-template-columns: 1fr;
  }
  .nodes-container {
    grid-template-columns: 1fr;
  }
  .torus-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .cluster-hero {
    flex-direction: column;
    align-items: flex-start;
  }
}