/* Data flow simulator styles */
.simulator-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.simulator-viewport {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--space-md);
  padding: var(--space-xl);
  background: var(--bg-secondary);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
  min-height: 500px;
  position: relative;
  overflow: hidden;
}

.simulator-stack {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.simulator-stack-title {
  text-align: center;
  font-weight: var(--fw-bold);
  font-size: var(--fs-md);
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
}

.simulator-layer {
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--border-radius-sm);
  text-align: center;
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: #fff;
  transition: all var(--transition-base);
  position: relative;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
}

.simulator-layer.active {
  transform: scale(1.05);
  box-shadow: var(--shadow-md);
  z-index: 1;
}

.simulator-layer.processing {
  animation: pulse 0.6s ease-in-out infinite;
}

.simulator-layer .header-badge {
  position: absolute;
  left: -4px;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255,255,255,0.3);
  border-radius: var(--border-radius-sm);
  padding: 2px 6px;
  font-size: var(--fs-xs);
  animation: headerAttach 0.3s ease forwards;
}

.simulator-layer .header-badge.removing {
  animation: headerDetach 0.3s ease forwards;
}

/* Wire / connection between stacks */
.simulator-wire {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  min-width: 120px;
}

.wire-line {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--border-color);
}

.wire-line::before,
.wire-line::after {
  content: '';
  position: absolute;
  top: -4px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border-color);
}

.wire-line::before { left: -5px; }
.wire-line::after { right: -5px; }

.wire-line.active {
  background: var(--accent);
}

.wire-line.active::before,
.wire-line.active::after {
  background: var(--accent);
}

/* Packet visualization */
.packet {
  position: absolute;
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius-sm);
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: var(--fs-xs);
  font-weight: var(--fw-bold);
  box-shadow: var(--shadow-md);
  z-index: 10;
  transition: all 0.5s ease;
}

.packet.sending {
  animation: glow 1s ease-in-out infinite;
}

.packet-headers {
  position: absolute;
  top: calc(100% + 4px);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 2px;
  white-space: nowrap;
}

.packet-header-chip {
  padding: 1px 4px;
  border-radius: 2px;
  font-size: 9px;
  font-weight: var(--fw-bold);
  color: #fff;
}

/* Simulator controls */
.simulator-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  padding: var(--space-md);
  background: var(--bg-secondary);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
}

.sim-btn {
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--border-radius);
  font-weight: var(--fw-medium);
  font-size: var(--fs-sm);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  transition: all var(--transition-fast);
}

.sim-btn-primary {
  background: var(--accent);
  color: #fff;
}

.sim-btn-primary:hover {
  background: var(--accent-hover);
}

.sim-btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.sim-btn-secondary:hover {
  background: var(--border-color);
}

.speed-control {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--fs-sm);
  color: var(--text-secondary);
}

.speed-slider {
  -webkit-appearance: none;
  width: 100px;
  height: 4px;
  border-radius: 2px;
  background: var(--bg-tertiary);
  outline: none;
}

.speed-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
}

/* Simulator info panel */
.simulator-info {
  padding: var(--space-lg);
  background: var(--bg-secondary);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
}

.simulator-info h3 {
  font-size: var(--fs-md);
  margin-bottom: var(--space-sm);
}

.simulator-info p {
  color: var(--text-secondary);
  font-size: var(--fs-sm);
  line-height: 1.6;
}

.step-indicator {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  margin-top: var(--space-md);
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

.step-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--bg-tertiary);
}

.step-dot.active {
  background: var(--accent);
}

.step-dot.completed {
  background: var(--success);
}

/* Encapsulation visualizer */
.encap-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  align-items: center;
}

.encap-stage {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: var(--space-md);
  border-radius: var(--border-radius);
  transition: all var(--transition-base);
  cursor: pointer;
  position: relative;
}

.encap-stage:hover {
  transform: scale(1.02);
}

.encap-stage.active {
  box-shadow: var(--shadow-lg);
  transform: scale(1.05);
}

.encap-header {
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--border-radius-sm);
  color: #fff;
  font-size: var(--fs-xs);
  font-weight: var(--fw-bold);
  white-space: nowrap;
  transition: all var(--transition-base);
  cursor: pointer;
}

.encap-header:hover {
  transform: scale(1.05);
}

.encap-data {
  padding: var(--space-sm) var(--space-xl);
  background: var(--bg-tertiary);
  border-radius: var(--border-radius-sm);
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.encap-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm);
  color: var(--text-muted);
}

.encap-arrow svg {
  width: 24px;
  height: 24px;
}

.encap-label {
  text-align: center;
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  margin-top: var(--space-xs);
}

.encap-detail-panel {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: var(--space-lg);
  width: 100%;
  max-width: 600px;
}

.encap-detail-panel h4 {
  margin-bottom: var(--space-sm);
}

.encap-field-list {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-xs) var(--space-md);
  font-size: var(--fs-sm);
}

.encap-field-name {
  font-weight: var(--fw-semibold);
  font-family: var(--font-mono);
  color: var(--accent);
}

.encap-field-desc {
  color: var(--text-secondary);
}

/* Signal wave at physical layer */
.signal-wave {
  width: 100%;
  height: 50px;
  overflow: hidden;
  position: relative;
}

.signal-wave svg {
  position: absolute;
  width: 200%;
  height: 100%;
  animation: signalWave 2s linear infinite;
}