/* Asadin Edu Physics · Interactive Physics Lab & Simulations Styles */

.sim-hub-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 24px;
  align-items: start;
  margin-top: 24px;
}

.sim-sidebar {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.sim-tab-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--trans-fast);
  border: 1px solid transparent;
  text-decoration: none;
}

.sim-tab-item:hover {
  background: var(--bg-glass);
  color: var(--text-primary);
}

.sim-tab-item.active {
  background: rgba(0, 242, 254, 0.1);
  border-color: rgba(0, 242, 254, 0.35);
  color: var(--cyan-bright);
  font-weight: 600;
}

.sim-tab-icon {
  font-size: 1.25rem;
  line-height: 1;
}

/* Simulation Arena Stage */
.sim-stage-container {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.sim-stage-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  background: rgba(0, 0, 0, 0.3);
  border-bottom: 1px solid var(--border-subtle);
}

.sim-title-group h2 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
}

.sim-title-group p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.sim-header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Canvas Viewport */
.sim-canvas-wrap {
  position: relative;
  width: 100%;
  height: 480px;
  background: radial-gradient(circle at center, #0c1220 0%, #060912 100%);
  overflow: hidden;
}

.sim-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* On-Canvas Telemetry HUD Overlay */
.sim-hud-overlay {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(8, 11, 20, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--cyan-bright);
  pointer-events: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.hud-line {
  display: flex;
  justify-content: space-between;
  gap: 16px;
}

.hud-val {
  color: #fff;
  font-weight: 600;
}

/* Simulation Controls Panel */
.sim-controls-panel {
  padding: 22px 24px;
  background: rgba(0, 0, 0, 0.25);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.sim-sliders-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 220px), 1fr));
  gap: 16px;
}

.sim-control-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.sim-control-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.sim-control-val {
  font-family: var(--font-mono);
  color: var(--cyan-bright);
}

.sim-range-input {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 3px;
  outline: none;
}

.sim-range-input::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--cyan-bright);
  cursor: pointer;
  box-shadow: 0 0 8px rgba(0, 242, 254, 0.6);
  transition: transform var(--trans-fast);
}

.sim-range-input::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.sim-buttons-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 10px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.sim-btn-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sim-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--trans-fast);
}

.sim-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(0, 242, 254, 0.3);
}

.sim-btn-active {
  background: var(--cyan-bright);
  color: #05070e;
  border-color: var(--cyan-bright);
}