/* ==========================================================================
   GESTURA AI - Phase 2: Gestura Flow (Refrigerant Cycle Simulation) Styles
   ========================================================================== */

.flow-container {
  display: grid;
  grid-template-columns: 1fr 430px;
  gap: 1.5rem;
  min-height: calc(100vh - 160px);
}

/* Simulation Arena Stage */
.flow-stage-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--glass-shadow);
}

/* Top Mode & Controls Bar */
.flow-stage-header {
  padding: 0.85rem 1.25rem;
  background: rgba(6, 11, 25, 0.9);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  z-index: 10;
}

.flow-mode-selector {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(14, 23, 47, 0.8);
  border: 1px solid var(--border-color);
  border-radius: var(--pill-radius);
  padding: 0.25rem;
}

.mode-toggle-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font-family-tech);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.35rem 0.85rem;
  border-radius: var(--pill-radius);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: var(--transition-fast);
}

.mode-toggle-btn:hover {
  color: var(--cyan-core);
}

.mode-toggle-btn.active {
  background: linear-gradient(135deg, var(--blue-electric), var(--cyan-core));
  color: #060913;
  box-shadow: 0 0 10px var(--cyan-glow);
}

.flow-speed-selector {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-family-tech);
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.speed-chip-btn {
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.75rem;
  font-family: var(--font-family-tech);
}

.speed-chip-btn.active {
  border-color: var(--cyan-core);
  color: var(--cyan-core);
  background: rgba(0, 240, 255, 0.15);
}

/* Interactive Refrigerant Circuit Board */
.circuit-board-wrapper {
  position: relative;
  flex: 1;
  min-height: 520px;
  background: radial-gradient(circle at 50% 50%, #0d1730 0%, #060913 90%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  overflow: hidden;
}

/* Pressure Zone Dividing Ambience */
.pressure-zone-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.zone-high-pressure-bg {
  background: radial-gradient(circle at 90% 20%, rgba(239, 68, 68, 0.08) 0%, transparent 60%),
              linear-gradient(to left, rgba(239, 68, 68, 0.04), transparent);
  border-left: 1px dashed rgba(239, 68, 68, 0.25);
  position: relative;
}

.zone-low-pressure-bg {
  background: radial-gradient(circle at 10% 80%, rgba(6, 182, 212, 0.08) 0%, transparent 60%),
              linear-gradient(to right, rgba(0, 240, 255, 0.04), transparent);
  position: relative;
}

.zone-marker-tag {
  position: absolute;
  padding: 0.3rem 0.75rem;
  border-radius: 4px;
  font-family: var(--font-family-tech);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  z-index: 5;
}

.zone-marker-tag.high {
  top: 1rem;
  right: 1.25rem;
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.4);
  color: #f87171;
}

.zone-marker-tag.low {
  bottom: 1rem;
  left: 1.25rem;
  background: rgba(6, 182, 212, 0.15);
  border: 1px solid rgba(6, 182, 212, 0.4);
  color: #38bdf8;
}

/* Central Firewall / Expansion Barrier Line */
.firewall-dividing-line {
  position: absolute;
  top: 0;
  left: 50%;
  width: 2px;
  height: 100%;
  background: linear-gradient(180deg, rgba(239, 68, 68, 0.4), rgba(255, 255, 255, 0.1), rgba(0, 240, 255, 0.4));
  pointer-events: none;
  z-index: 2;
}

.firewall-label-pill {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(-90deg);
  background: rgba(6, 11, 25, 0.9);
  border: 1px solid var(--border-color);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  font-family: var(--font-family-tech);
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  white-space: nowrap;
}

/* Circuit Interactive Nodes Grid */
.circuit-nodes-grid {
  position: relative;
  width: 100%;
  max-width: 680px;
  aspect-ratio: 16 / 11;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 4.5rem;
  z-index: 6;
}

/* Canvas Overlay for Animated Particle Pipes */
#refrigerant-flow-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 4;
}

/* Interactive Component Card Node */
.circuit-node-card {
  background: rgba(14, 23, 47, 0.85);
  backdrop-filter: blur(12px);
  border: 2px solid rgba(56, 189, 248, 0.25);
  border-radius: var(--card-radius);
  padding: 1.1rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  cursor: pointer;
  position: relative;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.55);
}

.circuit-node-card:hover {
  transform: translateY(-3px) scale(1.02);
  border-color: var(--cyan-core);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.7), 0 0 15px var(--cyan-glow);
}

.circuit-node-card.active-stage {
  border-color: var(--cyan-core);
  background: rgba(20, 36, 75, 0.95);
  box-shadow: 0 0 25px var(--cyan-glow), inset 0 0 15px rgba(0, 240, 255, 0.2);
  transform: scale(1.04);
}

.circuit-node-card.active-stage::after {
  content: "";
  position: absolute;
  top: -4px;
  left: -4px;
  right: -4px;
  bottom: -4px;
  border-radius: calc(var(--card-radius) + 2px);
  border: 2px solid var(--cyan-core);
  animation: pulse-border 1.8s infinite ease-in-out;
  pointer-events: none;
}

@keyframes pulse-border {
  0%, 100% { opacity: 0.8; transform: scale(1); }
  50% { opacity: 0.2; transform: scale(1.02); }
}

.node-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.4rem;
}

.node-step-badge {
  font-family: var(--font-family-tech);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--cyan-core);
  background: var(--cyan-subtle);
  border: 1px solid rgba(0, 240, 255, 0.3);
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
}

.node-title {
  font-family: var(--font-family-tech);
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.25rem;
}

.node-state-pill {
  font-size: 0.72rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.node-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.node-dot.hot-gas {
  background: #ef4444;
  box-shadow: 0 0 8px rgba(239, 68, 68, 0.8);
}

.node-dot.warm-liquid {
  background: #f59e0b;
  box-shadow: 0 0 8px rgba(245, 158, 11, 0.8);
}

.node-dot.cold-mist {
  background: #00f0ff;
  box-shadow: 0 0 8px var(--cyan-glow);
}

.node-dot.cool-vapor {
  background: #38bdf8;
  box-shadow: 0 0 8px rgba(56, 189, 248, 0.8);
}

/* Simulation Controls Bottom Dock */
.flow-controls-bar {
  padding: 0.75rem 1.25rem;
  background: rgba(6, 11, 25, 0.95);
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  z-index: 10;
}

.flow-nav-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.flow-ctrl-btn {
  background: rgba(14, 23, 47, 0.8);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-family: var(--font-family-tech);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.45rem 0.9rem;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.45rem;
  transition: var(--transition-fast);
}

.flow-ctrl-btn:hover {
  background: rgba(0, 240, 255, 0.15);
  border-color: var(--cyan-core);
  color: var(--cyan-core);
}

.flow-ctrl-btn.primary {
  background: linear-gradient(135deg, var(--blue-electric), var(--cyan-core));
  color: #060913;
  border-color: var(--cyan-core);
  box-shadow: 0 0 10px var(--cyan-glow);
}

/* Right Side Flow Educational Dossier Panel */
.flow-dossier-panel {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  height: 100%;
}

.flow-dossier-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
  overflow-y: auto;
  max-height: calc(100vh - 180px);
}

.dossier-thermo-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-family-tech);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.65rem;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.dossier-thermo-badge.high-side {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.35);
}

.dossier-thermo-badge.low-side {
  background: rgba(6, 182, 212, 0.15);
  color: #38bdf8;
  border: 1px solid rgba(6, 182, 212, 0.35);
}

/* Refrigerant In / Out Comparison Box */
.flow-transition-box {
  background: rgba(6, 11, 25, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  padding: 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.flow-transition-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.flow-trans-label {
  font-family: var(--font-family-tech);
  font-size: 0.72rem;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.flow-trans-val {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.35;
}

/* TVET Interesting Fact Box */
.fact-box {
  background: rgba(245, 158, 11, 0.08);
  border-left: 3px solid var(--warning);
  border-radius: 0 8px 8px 0;
  padding: 0.85rem 1rem;
}

.fact-title {
  font-family: var(--font-family-tech);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--warning);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.3rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.fact-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.45;
}

/* Cycle Legend Bar */
.cycle-legend-panel {
  background: rgba(6, 11, 25, 0.85);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0.85rem 1rem;
  font-size: 0.75rem;
}

.legend-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-top: 0.4rem;
}

.legend-row {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--text-secondary);
}

/* Educational Disclaimer Banner */
.educational-disclaimer {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-align: center;
  padding: 0.4rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* End-of-Module Quiz Modal / Section */
.flow-quiz-banner-card {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.15), rgba(0, 240, 255, 0.1));
  border: 1px solid var(--cyan-core);
  border-radius: var(--card-radius);
  padding: 1.5rem;
  text-align: center;
  margin-top: 1.5rem;
}

@media (max-width: 1024px) {
  .flow-container {
    grid-template-columns: 1fr;
  }
  .circuit-nodes-grid {
    gap: 2.5rem;
  }
}

@media (max-width: 640px) {
  .circuit-nodes-grid {
    gap: 1.25rem;
  }
  .node-title {
    font-size: 0.95rem;
  }
  .flow-controls-bar {
    justify-content: center;
  }
}