:root {
  --bg-primary: #0a0d14;
  --bg-surface: #121824;
  --bg-card: #182234;
  --border: #2e384d;
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --export-btn: #059669;
  --export-btn-hover: #047857;
  
  /* State Colors */
  --nominal: #10b981;
  --agitated: #38bdf8;
  --warning: #f59e0b;
  --danger: #ef4444;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-main);
  padding: 20px;
}

.container {
  max-width: 1300px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.subtitle { color: var(--text-muted); font-size: 0.85rem; margin-top: 2px; }

/* Real-Time Health HUD */
.health-hud {
  display: flex;
  gap: 14px;
  background: var(--bg-surface);
  padding: 8px 16px;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.hud-item { display: flex; flex-direction: column; align-items: center; }
.hud-label { font-size: 0.65rem; color: var(--text-muted); font-weight: 700; letter-spacing: 0.05em; }
.hud-val { font-size: 0.9rem; font-weight: 700; font-variant-numeric: tabular-nums; }

.badge { padding: 3px 8px; border-radius: 4px; font-size: 0.75rem; font-weight: 700; }
.badge-nominal { background: rgba(16, 185, 129, 0.2); color: var(--nominal); border: 1px solid var(--nominal); }
.badge-degraded { background: rgba(245, 158, 11, 0.2); color: var(--warning); border: 1px solid var(--warning); }
.badge-stalled { background: rgba(239, 68, 68, 0.2); color: var(--danger); border: 1px solid var(--danger); }
.badge-fault { background: var(--danger); color: #fff; animation: pulse 0.8s infinite; }

/* Controls Panel */
.controls-panel {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  background: var(--bg-surface);
  padding: 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  align-items: center;
}

.control-group { display: flex; align-items: center; gap: 10px; }
.export-group { margin-left: auto; }

.btn {
  padding: 8px 16px;
  border-radius: 6px;
  border: none;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.btn.primary { background: var(--accent); color: #fff; }
.btn.primary:hover:not(:disabled) { background: var(--accent-hover); }
.btn.secondary { background: #374151; color: #fff; }
.btn.export { background: var(--export-btn); color: #fff; }
.btn.export:hover:not(:disabled) { background: var(--export-btn-hover); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

select {
  background: var(--bg-card);
  color: var(--text-main);
  border: 1px solid var(--border);
  padding: 6px 10px;
  border-radius: 6px;
  min-width: 180px;
}

/* Alert Banner */
.alert-banner {
  padding: 12px;
  border-radius: 6px;
  font-weight: 700;
  text-align: center;
  transition: all 0.2s ease;
}

.alert-nominal { background: rgba(16, 185, 129, 0.15); color: var(--nominal); border: 1px solid var(--nominal); }
.alert-warn { background: rgba(245, 158, 11, 0.2); color: var(--warning); border: 1px solid var(--warning); }
.alert-danger { background: rgba(239, 68, 68, 0.25); color: var(--danger); border: 1px solid var(--danger); animation: pulse 1s infinite; }

@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.7; } }

/* Human Impact Grid */
.human-impact-section h2, .proximity-section h2 {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.impact-grid, .proximity-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 12px;
}

.impact-card, .proximity-card {
  background: var(--bg-surface);
  padding: 12px;
  border-radius: 6px;
  border: 1px solid var(--border);
}

.impact-header, .proximity-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 4px;
  font-size: 0.85rem;
  font-weight: 600;
}

.impact-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 8px;
  line-height: 1.3;
}

.impact-val, .proximity-pct { font-family: monospace; }

/* Progress Bar Components */
.bar-track {
  position: relative;
  height: 12px;
  background: var(--bg-primary);
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.bar-fill {
  height: 100%;
  border-radius: 6px;
  transition: width 0.1s linear, background-color 0.2s ease;
}

.threshold-marker {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  background: #ffffff;
  opacity: 0.5;
}

.bar-quiet { background: #374151; }
.bar-agitated { background: var(--agitated); }
.bar-warning { background: var(--warning); }
.bar-triggered { background: var(--danger); box-shadow: 0 0 10px var(--danger); }

/* Visualizers */
.visualizer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.canvas-card {
  background: var(--bg-surface);
  padding: 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.canvas-card h3 { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 6px; }
canvas { width: 100%; height: 160px; background: var(--bg-primary); border-radius: 4px; display: block; }

/* Metrics Grid */
.metrics-dashboard {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 10px;
}

.metric-card {
  background: var(--bg-surface);
  padding: 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
  text-align: center;
}

.metric-card h4 { font-size: 0.7rem; color: var(--text-muted); text-transform: uppercase; }
.metric-card span { font-size: 1.15rem; font-weight: 700; font-variant-numeric: tabular-nums; }

/* Telemetry Output */
.telemetry-log {
  background: var(--bg-surface);
  padding: 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.telemetry-log h3 { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 6px; }

pre {
  background: var(--bg-primary);
  padding: 10px;
  border-radius: 4px;
  font-family: monospace;
  font-size: 0.7rem;
  color: #38bdf8;
  max-height: 140px;
  overflow-y: auto;
}