/**
 * Industrial Control-Room Design System
 * Theme: Dark Industrial Graphite / Slate with High-Contrast Severity Accents
 * Typography: Inter (UI) & JetBrains Mono / SF Mono (Telemetry Values & Timestamps)
 */

:root {
  /* Surface colors */
  --bg-app: #0a0d14;
  --bg-header: #101522;
  --bg-sidebar: #0e121d;
  --bg-card: #131929;
  --bg-card-hover: #182035;
  --bg-card-subtle: #0d121f;
  --border-subtle: #1e293b;
  --border-strong: #334155;
  --border-focus: #3b82f6;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Consolas', monospace;
  
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-subtle: #64748b;
  --text-inverse: #0a0d14;

  /* Industrial Status & Severity Colors */
  --color-normal: #10b981;
  --color-normal-bg: rgba(16, 185, 129, 0.12);
  --color-normal-border: rgba(16, 185, 129, 0.35);

  --color-warning: #f59e0b;
  --color-warning-bg: rgba(245, 158, 11, 0.12);
  --color-warning-border: rgba(245, 158, 11, 0.4);

  --color-critical: #ef4444;
  --color-critical-bg: rgba(239, 68, 68, 0.15);
  --color-critical-border: rgba(239, 68, 68, 0.45);
  --color-critical-glow: rgba(239, 68, 68, 0.3);

  --color-advisory: #06b6d4;
  --color-advisory-bg: rgba(6, 182, 212, 0.12);
  --color-advisory-border: rgba(6, 182, 212, 0.35);

  --color-stale: #8b5cf6;
  --color-stale-bg: rgba(139, 92, 246, 0.15);
  --color-stale-border: rgba(139, 92, 246, 0.4);

  --color-fault: #f43f5e;
  --color-fault-bg: rgba(244, 63, 94, 0.15);
  --color-fault-border: rgba(244, 63, 94, 0.4);

  --color-accent: #3b82f6;
  --color-accent-bg: rgba(59, 130, 246, 0.15);

  /* Shadows & Radius */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-panel: 0 4px 12px rgba(0, 0, 0, 0.45);
  --shadow-card: 0 2px 6px rgba(0, 0, 0, 0.3);
}

/* Reset & Box Sizing */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-app);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 13px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* Monospace Helpers */
.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* App Header Bar */
.app-header {
  background-color: var(--bg-header);
  border-bottom: 1px solid var(--border-subtle);
  padding: 10px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.5);
}

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

.brand-icon {
  width: 28px;
  height: 28px;
  color: #60a5fa;
  flex-shrink: 0;
}

.brand-title {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: #fff;
  text-transform: uppercase;
}

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

.header-selectors {
  display: flex;
  align-items: center;
  gap: 12px;
}

.selector-group {
  display: flex;
  align-items: center;
  gap: 6px;
  background-color: var(--bg-card-subtle);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 4px 8px;
}

.selector-label {
  font-size: 10px;
  text-transform: uppercase;
  color: var(--text-subtle);
  font-weight: 600;
}

.header-select {
  background: transparent;
  border: none;
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  outline: none;
  cursor: pointer;
  padding: 2px 4px;
}

.header-select option {
  background-color: var(--bg-card);
  color: #fff;
}

.header-telemetry-status {
  display: flex;
  align-items: center;
  gap: 16px;
}

.connection-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-weight: 600;
  background-color: var(--bg-card-subtle);
  border: 1px solid var(--border-strong);
}

.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--color-normal);
  animation: pulse-ring 2s infinite;
}

.pulse-dot.stale {
  background-color: var(--color-stale);
  animation: none;
}

.pulse-dot.disconnected {
  background-color: var(--color-critical);
  animation: none;
}

@keyframes pulse-ring {
  0% { transform: scale(0.95); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.7; }
  100% { transform: scale(0.95); opacity: 1; }
}

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

.freshness-tag.stale-warning {
  color: var(--color-stale);
  font-weight: 700;
}

/* Alarm Tally Badges in Header */
.alarm-summary-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.alarm-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s ease;
}

.alarm-badge:hover {
  transform: translateY(-1px);
}

.alarm-badge.critical {
  background-color: var(--color-critical-bg);
  border: 1px solid var(--color-critical-border);
  color: #fca5a5;
}

.alarm-badge.critical.active-glow {
  animation: critical-glow 1.5s infinite;
}

@keyframes critical-glow {
  0% { box-shadow: 0 0 0 0 var(--color-critical-glow); }
  70% { box-shadow: 0 0 0 6px rgba(239, 68, 68, 0); }
  100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}

.alarm-badge.warning {
  background-color: var(--color-warning-bg);
  border: 1px solid var(--color-warning-border);
  color: #fcd34d;
}

.station-clock {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  text-align: right;
  line-height: 1.2;
}

/* Safety Invariant Notice Banner */
.safety-banner {
  background: linear-gradient(90deg, #1e293b, #0f172a);
  border-bottom: 1px solid var(--border-strong);
  padding: 4px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
}

.safety-tag {
  color: #38bdf8;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
}

.demo-thresholds-tag {
  color: #fbbf24;
  font-weight: 600;
  background-color: rgba(245, 158, 11, 0.1);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(245, 158, 11, 0.25);
}

/* Navigation Tab Bar */
.nav-tab-bar {
  background-color: var(--bg-sidebar);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0 20px;
  display: flex;
  gap: 4px;
}

.tab-btn {
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 600;
  padding: 10px 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s ease;
}

.tab-btn:hover {
  color: #fff;
  background-color: rgba(255, 255, 255, 0.03);
}

.tab-btn.active {
  color: #60a5fa;
  border-bottom-color: #3b82f6;
  background-color: rgba(59, 130, 246, 0.08);
}

.tab-badge {
  font-size: 10px;
  padding: 1px 5px;
  border-radius: 10px;
  background-color: var(--border-strong);
  color: #fff;
}

.tab-badge.critical {
  background-color: var(--color-critical);
}

.tab-badge.warning {
  background-color: var(--color-warning);
  color: #000;
}

/* Main Workspace Viewport */
.main-viewport {
  flex: 1;
  padding: 20px;
  max-width: 1920px;
  margin: 0 auto;
  width: 100%;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* Industrial Grid & Card Layouts */
.grid-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.metric-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  box-shadow: var(--shadow-card);
  position: relative;
  transition: border-color 0.2s ease;
}

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

.metric-card.critical-border {
  border-color: var(--color-critical-border);
  background-color: rgba(239, 68, 68, 0.04);
}

.metric-card.warning-border {
  border-color: var(--color-warning-border);
  background-color: rgba(245, 158, 11, 0.04);
}

.metric-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 8px;
}

.metric-title {
  font-size: 11px;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 600;
  letter-spacing: 0.4px;
}

.metric-provenance {
  font-size: 10px;
  color: var(--text-subtle);
}

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

.metric-value {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.5px;
}

.metric-value.stale-val {
  color: var(--color-stale);
  text-decoration: underline dotted;
}

.metric-value.fault-val {
  color: var(--color-fault);
}

.metric-unit {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
}

/* Quality Pills */
.quality-pill {
  font-size: 9px;
  font-weight: 700;
  text-transform: uppercase;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.quality-pill.good {
  background-color: var(--color-normal-bg);
  color: #34d399;
  border: 1px solid var(--color-normal-border);
}

.quality-pill.stale {
  background-color: var(--color-stale-bg);
  color: #c084fc;
  border: 1px solid var(--color-stale-border);
}

.quality-pill.missing {
  background-color: var(--color-fault-bg);
  color: #fb7185;
  border: 1px solid var(--color-fault-border);
}

.quality-pill.sensor_fault {
  background-color: var(--color-fault-bg);
  color: #fda4af;
  border: 1px solid var(--color-fault-border);
}

.quality-pill.out_of_range {
  background-color: rgba(234, 88, 12, 0.15);
  color: #fb923c;
  border: 1px solid rgba(234, 88, 12, 0.4);
}

/* Progress & Threshold Range Bar */
.threshold-bar-container {
  height: 6px;
  background-color: var(--bg-card-subtle);
  border-radius: 3px;
  overflow: hidden;
  position: relative;
  margin-top: 6px;
  border: 1px solid var(--border-subtle);
}

.threshold-bar-fill {
  height: 100%;
  background-color: var(--color-normal);
  transition: width 0.3s ease;
}

.threshold-bar-fill.warning {
  background-color: var(--color-warning);
}

.threshold-bar-fill.critical {
  background-color: var(--color-critical);
}

.metric-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 10px;
  color: var(--text-subtle);
  margin-top: 8px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 6px;
}

/* Dual Column Layout (e.g. Schematic + Live Alarms) */
.layout-split {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

@media (max-width: 1200px) {
  .layout-split {
    grid-template-columns: 1fr;
  }
}

.panel-container {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 18px;
  box-shadow: var(--shadow-panel);
}

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

.panel-title {
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 8px;
}

.panel-actions {
  display: flex;
  gap: 8px;
}

/* Interactive SVG Schematic */
.schematic-wrapper {
  width: 100%;
  background-color: #0d121f;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 12px;
  position: relative;
}

.schematic-svg {
  width: 100%;
  height: auto;
  max-height: 480px;
  display: block;
}

/* Table Styling */
.industrial-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
  text-align: left;
}

.industrial-table th {
  background-color: var(--bg-card-subtle);
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 10px;
  letter-spacing: 0.5px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border-strong);
}

.industrial-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-main);
}

.industrial-table tr:hover td {
  background-color: var(--bg-card-hover);
}

.industrial-table .severity-cell {
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

.industrial-table .severity-cell.critical {
  color: #fca5a5;
  background-color: var(--color-critical-bg);
  border: 1px solid var(--color-critical-border);
}

.industrial-table .severity-cell.warning {
  color: #fcd34d;
  background-color: var(--color-warning-bg);
  border: 1px solid var(--color-warning-border);
}

/* Buttons & Inputs */
.btn {
  background-color: var(--bg-card-subtle);
  border: 1px solid var(--border-strong);
  color: #fff;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s ease;
}

.btn:hover {
  background-color: var(--border-strong);
  border-color: #475569;
}

.btn-primary {
  background-color: #2563eb;
  border-color: #3b82f6;
}

.btn-primary:hover {
  background-color: #1d4ed8;
}

.btn-danger {
  background-color: #dc2626;
  border-color: #ef4444;
}

.btn-danger:hover {
  background-color: #b91c1c;
}

.ack-btn {
  background-color: #dc2626 !important;
  border-color: #ef4444 !important;
  color: #ffffff !important;
  font-weight: 700;
  box-shadow: 0 1px 3px rgba(220, 38, 38, 0.4);
}

.ack-btn:hover {
  background-color: #b91c1c !important;
  border-color: #f87171 !important;
  box-shadow: 0 0 8px rgba(239, 68, 68, 0.5);
}

.btn-sm {
  padding: 3px 8px;
  font-size: 11px;
}

/* Modals */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(3px);
  z-index: 999;
  justify-content: center;
  align-items: center;
}

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

.modal-content {
  background-color: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  box-shadow: 0 10px 25px rgba(0,0,0,0.8);
  width: 90%;
  max-width: 650px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 20px;
}

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

.modal-title {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
}

.modal-close-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 20px;
  cursor: pointer;
}

.modal-close-btn:hover {
  color: #fff;
}

.modal-body {
  margin-bottom: 20px;
}

.form-group {
  margin-bottom: 14px;
}

.form-label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.form-input, .form-textarea {
  width: 100%;
  background-color: var(--bg-card-subtle);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  color: #fff;
  font-size: 13px;
  font-family: inherit;
  outline: none;
}

.form-input:focus, .form-textarea:focus {
  border-color: var(--border-focus);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  border-top: 1px solid var(--border-subtle);
  padding-top: 14px;
}

/* Time Series Chart Container */
.chart-container {
  width: 100%;
  height: 420px;
  background-color: #0b0f19;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  position: relative;
  overflow: hidden;
}

.chart-svg {
  width: 100%;
  height: 100%;
  display: block;
}

/* Tooltip */
.chart-tooltip {
  position: absolute;
  background-color: rgba(15, 23, 42, 0.95);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 11px;
  pointer-events: none;
  box-shadow: 0 4px 12px rgba(0,0,0,0.5);
  display: none;
  z-index: 50;
}

/* Duval Triangle Diagram Styling */
.duval-container {
  display: flex;
  gap: 20px;
  align-items: center;
}

@media (max-width: 900px) {
  .duval-container {
    flex-direction: column;
  }
}

.duval-svg-wrap {
  flex: 1;
  max-width: 450px;
  background-color: #0d121f;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 10px;
}

.duval-legend {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.duval-zone-badge {
  display: inline-block;
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 10px;
  font-weight: 700;
  margin-right: 6px;
}