:root {
  --bg-dark: #0b111e;
  --bg-panel: rgba(16, 24, 40, 0.92);
  --bg-panel-solid: #111927;
  --bg-card: rgba(26, 37, 58, 0.75);
  --bg-card-hover: rgba(36, 51, 78, 0.9);
  --border-subtle: rgba(148, 163, 184, 0.16);
  --border-focus: rgba(56, 189, 248, 0.55);
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --accent-blue: #38bdf8;
  --accent-cyan: #06b6d4;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-orange: #f97316;
  --accent-red: #ef4444;
  --accent-purple: #a855f7;
  --shadow-lg: 0 12px 32px -4px rgba(0, 0, 0, 0.6);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
  --font-mono: 'Cascadia Code', 'Fira Code', Consolas, monospace;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 13px;
  line-height: 1.4;
}

/* Layout Principal */
.app-layout {
  display: grid;
  grid-template-rows: 54px 1fr;
  grid-template-columns: 340px 1fr 350px;
  width: 100vw;
  height: 100vh;
}

/* Topbar */
.topbar {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  background: linear-gradient(90deg, #0f172a 0%, #162238 50%, #0f172a 100%);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 20;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-icon {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  box-shadow: 0 0 14px rgba(56, 189, 248, 0.35);
}

.brand-title {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.3px;
  color: #fff;
}

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

/* Mode Switcher (Sencillo vs Avanzado) */
.mode-switch-container {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mode-tabs {
  display: flex;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 3px;
}

.mode-tab {
  border: none;
  background: transparent;
  color: var(--text-muted);
  padding: 6px 14px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 7px;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 6px;
}

.mode-tab.active {
  background: linear-gradient(135deg, #0284c7, #2563eb);
  color: #fff;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.4);
}

.mode-tab:hover:not(.active) {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.05);
}

/* Simulation Controls in Topbar */
.sim-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn {
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--text-main);
  padding: 6px 11px;
  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: var(--bg-card-hover);
  border-color: rgba(148, 163, 184, 0.35);
}

.btn.active {
  background: rgba(56, 189, 248, 0.2);
  border-color: var(--accent-blue);
  color: var(--accent-blue);
}

.btn-danger {
  background: rgba(239, 68, 68, 0.15);
  border-color: rgba(239, 68, 68, 0.4);
  color: #fca5a5;
}

.btn-danger:hover {
  background: rgba(239, 68, 68, 0.28);
}

.btn-primary {
  background: linear-gradient(135deg, #0ea5e9, #2563eb);
  border-color: #38bdf8;
  color: #fff;
}

.btn-primary:hover {
  filter: brightness(1.1);
}

/* Sidebars */
.sidebar {
  background: var(--bg-panel-solid);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 12px;
  gap: 12px;
  z-index: 10;
}

.sidebar-right {
  border-right: none;
  border-left: 1px solid var(--border-subtle);
}

.sidebar::-webkit-scrollbar {
  width: 6px;
}

.sidebar::-webkit-scrollbar-thumb {
  background: rgba(148, 163, 184, 0.25);
  border-radius: 3px;
}

/* Section Cards */
.panel-section {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 11px;
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--accent-blue);
  border-bottom: 1px solid rgba(148, 163, 184, 0.12);
  padding-bottom: 6px;
}

.section-badge {
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 10px;
  background: rgba(56, 189, 248, 0.15);
  color: var(--accent-blue);
  text-transform: none;
  font-weight: 600;
}

/* Hazard Grid */
.hazard-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 7px;
}

.hazard-card {
  background: rgba(15, 23, 42, 0.65);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 8px 9px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: all 0.18s ease;
  position: relative;
  overflow: hidden;
}

.hazard-card:hover {
  background: rgba(30, 41, 59, 0.9);
  border-color: rgba(148, 163, 184, 0.4);
  transform: translateY(-1px);
}

.hazard-card.active {
  background: rgba(14, 165, 233, 0.16);
  border-color: var(--accent-blue);
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.22);
}

.hazard-card.active::after {
  content: 'ACTIVO';
  position: absolute;
  top: 5px;
  right: 5px;
  font-size: 8.5px;
  font-weight: 800;
  padding: 1px 4px;
  border-radius: 4px;
  background: var(--accent-blue);
  color: #090d16;
}

.hazard-top {
  display: flex;
  align-items: center;
  gap: 7px;
}

.hazard-icon {
  font-size: 18px;
}

.hazard-name {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-main);
}

.hazard-desc {
  font-size: 10.5px;
  color: var(--text-muted);
  line-height: 1.25;
}

/* Quick Severity Selector (Simple Mode) */
.severity-pills {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
}

.severity-pill {
  padding: 6px 4px;
  text-align: center;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  background: rgba(15, 23, 42, 0.6);
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
}

.severity-pill.active[data-level="low"] {
  background: rgba(16, 185, 129, 0.2);
  border-color: var(--accent-emerald);
  color: #6ee7b7;
}

.severity-pill.active[data-level="medium"] {
  background: rgba(245, 158, 11, 0.2);
  border-color: var(--accent-amber);
  color: #fcd34d;
}

.severity-pill.active[data-level="extreme"] {
  background: rgba(239, 68, 68, 0.22);
  border-color: var(--accent-red);
  color: #fca5a5;
}

/* Sliders & Controls (Advanced Mode) */
.control-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.control-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11.5px;
}

.control-label {
  color: var(--text-main);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 5px;
}

.control-value {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent-blue);
  background: rgba(15, 23, 42, 0.7);
  padding: 1px 6px;
  border-radius: 4px;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 5px;
  background: rgba(15, 23, 42, 0.9);
  border-radius: 4px;
  outline: none;
  border: 1px solid rgba(148, 163, 184, 0.2);
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent-blue);
  cursor: pointer;
  border: 2px solid #fff;
  box-shadow: 0 0 6px rgba(56, 189, 248, 0.6);
}

select.select-input {
  width: 100%;
  padding: 6px 8px;
  background: rgba(15, 23, 42, 0.85);
  color: var(--text-main);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-size: 12px;
  outline: none;
  cursor: pointer;
}

select.select-input:focus {
  border-color: var(--accent-blue);
}

/* Mitigation / Interactive Tools */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px;
}

.tool-btn {
  background: rgba(15, 23, 42, 0.65);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 7px 8px;
  color: var(--text-main);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s;
  text-align: left;
}

.tool-btn:hover {
  background: rgba(30, 41, 59, 0.9);
  border-color: rgba(148, 163, 184, 0.4);
}

.tool-btn.active {
  background: rgba(16, 185, 129, 0.18);
  border-color: var(--accent-emerald);
  color: #6ee7b7;
  box-shadow: 0 0 10px rgba(16, 185, 129, 0.25);
}

/* Center Viewport / Maqueta 3D */
.viewport-container {
  position: relative;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 50% 35%, #1a2942 0%, #090f1a 100%);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

#simCanvas {
  width: 100%;
  height: 100%;
  display: block;
  cursor: grab;
}

#simCanvas:active {
  cursor: grabbing;
}

/* Floating HUD Overlays on Canvas */
.canvas-hud-top {
  position: absolute;
  top: 12px;
  left: 12px;
  right: 12px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  pointer-events: none;
  gap: 10px;
}

.hud-pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  pointer-events: auto;
}

.hud-pill {
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  padding: 5px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 5px;
  transition: all 0.15s;
}

.hud-pill:hover {
  border-color: var(--accent-blue);
}

.hud-pill.active {
  background: rgba(56, 189, 248, 0.22);
  border-color: var(--accent-blue);
  color: #fff;
}

.weather-banner {
  background: rgba(15, 23, 42, 0.88);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 7px 12px;
  display: flex;
  align-items: center;
  gap: 12px;
  pointer-events: auto;
  box-shadow: var(--shadow-lg);
}

.weather-stat {
  display: flex;
  flex-direction: column;
}

.weather-stat-label {
  font-size: 9.5px;
  color: var(--text-muted);
  text-transform: uppercase;
}

.weather-stat-val {
  font-size: 12.5px;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--text-main);
}

.canvas-hud-bottom {
  position: absolute;
  bottom: 12px;
  left: 12px;
  right: 12px;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  pointer-events: none;
}

.legend-box {
  background: rgba(15, 23, 42, 0.86);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 8px 12px;
  pointer-events: auto;
  display: flex;
  gap: 12px;
  align-items: center;
  font-size: 11px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 5px;
  color: var(--text-muted);
}

.legend-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
}

.camera-controls {
  display: flex;
  gap: 6px;
  pointer-events: auto;
}

/* Right Sidebar: Telemetry, Causal Diagnosis & Event Log */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 7px;
}

.kpi-card {
  background: rgba(15, 23, 42, 0.65);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.kpi-title {
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
}

.kpi-value {
  font-size: 16px;
  font-weight: 800;
  font-family: var(--font-mono);
}

.kpi-bar {
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 2px;
  overflow: hidden;
  margin-top: 2px;
}

.kpi-bar-fill {
  height: 100%;
  width: 0%;
  transition: width 0.25s ease, background-color 0.25s ease;
}

/* Inspector & Causal Explanation Box */
.inspector-card {
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.85) 0%, rgba(23, 37, 64, 0.75) 100%);
  border: 1px solid rgba(56, 189, 248, 0.35);
  border-radius: var(--radius-sm);
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.inspector-title {
  font-size: 12.5px;
  font-weight: 700;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.status-tag {
  font-size: 10px;
  padding: 2px 7px;
  border-radius: 10px;
  font-weight: 700;
}

.status-ok { background: rgba(16, 185, 129, 0.2); color: #6ee7b7; }
.status-warn { background: rgba(245, 158, 11, 0.22); color: #fcd34d; }
.status-danger { background: rgba(239, 68, 68, 0.25); color: #fca5a5; }

.causal-chain {
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: 11.5px;
  color: #cbd5e1;
  background: rgba(9, 13, 22, 0.55);
  padding: 8px;
  border-radius: 6px;
  border-left: 3px solid var(--accent-blue);
}

.causal-step {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  line-height: 1.35;
}

.inspector-stats-mini {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 5px;
  font-size: 11px;
  color: var(--text-muted);
}

.inspector-stats-mini span strong {
  color: var(--text-main);
}

/* Event Feed */
.event-log {
  display: flex;
  flex-direction: column;
  gap: 5px;
  max-height: 170px;
  overflow-y: auto;
  padding-right: 3px;
}

.event-item {
  font-size: 11px;
  padding: 6px 8px;
  border-radius: 5px;
  background: rgba(15, 23, 42, 0.65);
  border-left: 3px solid var(--accent-blue);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.event-item.warn { border-left-color: var(--accent-amber); }
.event-item.danger { border-left-color: var(--accent-red); }
.event-item.mitigation { border-left-color: var(--accent-emerald); }

.event-time {
  font-size: 9.5px;
  color: var(--text-dim);
  font-family: var(--font-mono);
}

/* Mini Telemetry Chart */
#telemetryChart {
  width: 100%;
  height: 75px;
  background: rgba(9, 13, 22, 0.65);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
}

/* Modal Guide */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(5, 9, 17, 0.78);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal-backdrop.hidden {
  display: none;
}

.modal-card {
  width: min(680px, 92vw);
  max-height: 85vh;
  background: #111927;
  border: 1px solid rgba(56, 189, 248, 0.4);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.modal-header {
  padding: 14px 18px;
  background: rgba(15, 23, 42, 0.9);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-body {
  padding: 18px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
  font-size: 13px;
  color: #cbd5e1;
  line-height: 1.55;
}

.guide-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.guide-item {
  background: rgba(26, 37, 58, 0.6);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 10px;
}

.guide-item h4 {
  color: var(--accent-blue);
  margin-bottom: 4px;
  font-size: 12.5px;
}

.hidden {
  display: none !important;
}

@media (max-width: 1180px) {
  .app-layout {
    grid-template-columns: 290px 1fr 300px;
  }
}