/* ============================================================
   TB Simulation — Cinematic Interactive Experience
   Prefix: sim-
   ============================================================ */

/* ---------- Hero ---------- */
.sim-hero {
  position: relative;
  padding: 140px 0 80px;
  background: linear-gradient(135deg, #0a1628 0%, #0f2b1a 40%, #0a1628 100%);
  text-align: center;
  overflow: hidden;
}
.sim-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 80%, rgba(19,117,71,0.15) 0%, transparent 60%),
              radial-gradient(circle at 20% 20%, rgba(234,88,12,0.08) 0%, transparent 40%);
  pointer-events: none;
}
.sim-hero-badge {
  display: inline-block;
  padding: 6px 18px;
  border-radius: 50px;
  background: rgba(234,88,12,0.15);
  color: #ea580c;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 20px;
}
.sim-hero h1 {
  font-family: var(--font-serif, 'Playfair Display', serif);
  font-size: clamp(2rem, 5vw, 3.25rem);
  color: #fff;
  margin-bottom: 16px;
  line-height: 1.15;
}
.sim-hero p {
  font-size: 1.0625rem;
  color: rgba(255,255,255,0.7);
  max-width: 600px;
  margin: 0 auto 32px;
  line-height: 1.7;
}
.sim-start-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 36px;
  border-radius: 50px;
  background: linear-gradient(135deg, #ea580c, #dc2626);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: transform 0.3s, box-shadow 0.3s;
  box-shadow: 0 4px 20px rgba(234,88,12,0.3);
}
.sim-start-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(234,88,12,0.4);
}

/* ---------- Scene Navigation ---------- */
.sim-nav-wrap {
  position: sticky;
  top: 70px;
  z-index: 90;
  background: rgba(255,255,255,0.97);
  border-bottom: 1px solid rgba(0,0,0,0.06);
  backdrop-filter: blur(12px);
  padding: 12px 0;
  transition: box-shadow 0.3s;
}
.sim-nav-wrap.scrolled { box-shadow: 0 2px 12px rgba(0,0,0,0.08); }
.sim-nav {
  display: flex;
  justify-content: center;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.sim-nav::-webkit-scrollbar { display: none; }
.sim-nav-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 50px;
  background: transparent;
  border: 2px solid transparent;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--gray-500, #9ca3af);
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.3s;
}
.sim-nav-item:hover {
  color: var(--gray-700, #374151);
  background: rgba(0,0,0,0.03);
}
.sim-nav-item.active {
  color: #ea580c;
  border-color: #ea580c;
  background: rgba(234,88,12,0.06);
  font-weight: 600;
}
.sim-nav-item.visited {
  color: var(--green-700, #137547);
}
.sim-nav-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--gray-200, #e5e7eb);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--gray-500, #9ca3af);
  transition: all 0.3s;
}
.sim-nav-item.active .sim-nav-num {
  background: #ea580c;
  color: #fff;
}
.sim-nav-item.visited .sim-nav-num {
  background: var(--green-700, #137547);
  color: #fff;
}
.sim-nav-connector {
  width: 24px;
  height: 2px;
  background: var(--gray-200, #e5e7eb);
  align-self: center;
  flex-shrink: 0;
}
.sim-nav-connector.done { background: var(--green-700, #137547); }

/* ---------- Scenes ---------- */
.sim-scene {
  display: none;
  opacity: 0;
  padding: 48px 0 60px;
  min-height: 60vh;
}
.sim-scene.active {
  display: block;
  animation: simEnter 0.8s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}
@keyframes simEnter {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}
.sim-scene-header {
  text-align: center;
  margin-bottom: 40px;
}
.sim-scene-header h2 {
  font-family: var(--font-serif, 'Playfair Display', serif);
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  color: var(--dark, #111827);
  margin-bottom: 8px;
}
.sim-scene-header p {
  font-size: 1rem;
  color: var(--gray-500, #9ca3af);
  max-width: 520px;
  margin: 0 auto;
}

/* ---------- Viewport (SVG + Canvas) ---------- */
.sim-viewport {
  position: relative;
  max-width: 800px;
  margin: 0 auto 32px;
  aspect-ratio: 16 / 10;
  border-radius: 16px;
  overflow: hidden;
  background: #0a1628;
  box-shadow: 0 8px 40px rgba(0,0,0,0.2);
}
.sim-viewport svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.sim-viewport canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

/* Labels overlaid on viewport */
.sim-label {
  position: absolute;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 6px;
  background: rgba(0,0,0,0.6);
  color: #fff;
  pointer-events: none;
  white-space: nowrap;
  transition: opacity 0.4s;
}
.sim-label.danger { background: rgba(234,88,12,0.8); }
.sim-label.success { background: rgba(19,117,71,0.8); }

/* ---------- Controls Panel ---------- */
.sim-controls {
  max-width: 800px;
  margin: 0 auto;
  padding: 24px 28px;
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 2px 16px rgba(0,0,0,0.06);
  border: 1px solid rgba(0,0,0,0.06);
}
.sim-controls-title {
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--gray-400, #9ca3af);
  margin-bottom: 16px;
}
.sim-control-row {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.sim-control-row:last-child { margin-bottom: 0; }
.sim-control-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--gray-700, #374151);
  min-width: 120px;
}
.sim-control-value {
  font-size: 0.875rem;
  font-weight: 700;
  color: #ea580c;
  min-width: 50px;
  text-align: right;
}

/* Range slider */
.sim-slider {
  -webkit-appearance: none;
  appearance: none;
  flex: 1;
  height: 6px;
  border-radius: 3px;
  background: var(--gray-200, #e5e7eb);
  outline: none;
  transition: background 0.3s;
}
.sim-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: #ea580c;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(234,88,12,0.3);
  transition: transform 0.2s;
}
.sim-slider::-webkit-slider-thumb:hover { transform: scale(1.15); }
.sim-slider::-moz-range-thumb {
  width: 20px; height: 20px;
  border-radius: 50%;
  background: #ea580c;
  cursor: pointer;
  border: none;
}

/* Toggle switches */
.sim-toggle-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}
.sim-toggle {
  position: relative;
  width: 44px; height: 24px;
  background: var(--gray-300, #d1d5db);
  border-radius: 12px;
  cursor: pointer;
  transition: background 0.3s;
  border: none;
  padding: 0;
}
.sim-toggle.on { background: var(--green-700, #137547); }
.sim-toggle::after {
  content: '';
  position: absolute;
  top: 3px; left: 3px;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: #fff;
  transition: transform 0.3s;
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}
.sim-toggle.on::after { transform: translateX(20px); }
.sim-toggle-label {
  font-size: 0.8125rem;
  color: var(--gray-600, #6b7280);
}

/* Risk meter */
.sim-meter-wrap {
  margin-top: 16px;
  padding: 16px 0 0;
  border-top: 1px solid rgba(0,0,0,0.06);
}
.sim-meter-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}
.sim-meter-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--gray-700, #374151);
}
.sim-meter-value {
  font-size: 1.125rem;
  font-weight: 800;
}
.sim-meter-value.low { color: var(--green-700, #137547); }
.sim-meter-value.med { color: #f59e0b; }
.sim-meter-value.high { color: #ea580c; }
.sim-meter-value.extreme { color: #dc2626; }
.sim-meter {
  height: 10px;
  border-radius: 5px;
  background: var(--gray-200, #e5e7eb);
  overflow: hidden;
}
.sim-meter-fill {
  height: 100%;
  border-radius: 5px;
  transition: width 0.4s ease, background 0.4s ease;
  background: linear-gradient(90deg, #137547, #f59e0b, #ea580c, #dc2626);
}

/* ---------- Scene-Specific: Immune Toggle Buttons ---------- */
.sim-immune-btns {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.sim-immune-btn {
  flex: 1;
  min-width: 160px;
  padding: 12px 20px;
  border-radius: 12px;
  border: 2px solid var(--gray-200, #e5e7eb);
  background: #fff;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  text-align: center;
}
.sim-immune-btn.strong { color: var(--green-700, #137547); }
.sim-immune-btn.weak { color: #dc2626; }
.sim-immune-btn.strong.active {
  border-color: var(--green-700, #137547);
  background: rgba(19,117,71,0.06);
  box-shadow: 0 0 0 3px rgba(19,117,71,0.1);
}
.sim-immune-btn.weak.active {
  border-color: #dc2626;
  background: rgba(220,38,38,0.06);
  box-shadow: 0 0 0 3px rgba(220,38,38,0.1);
}

/* Playback controls */
.sim-playback {
  display: flex;
  align-items: center;
  gap: 8px;
}
.sim-play-btn {
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 2px solid var(--gray-300, #d1d5db);
  background: #fff;
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s;
}
.sim-play-btn:hover { border-color: #ea580c; color: #ea580c; }
.sim-play-btn.playing { border-color: #ea580c; background: #ea580c; color: #fff; }
.sim-speed-btn {
  padding: 6px 12px;
  border-radius: 8px;
  border: 1px solid var(--gray-200, #e5e7eb);
  background: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
  color: var(--gray-500, #9ca3af);
  transition: all 0.2s;
}
.sim-speed-btn.active { background: var(--gray-100, #f3f4f6); color: var(--dark, #111827); border-color: var(--gray-400, #9ca3af); }

/* ---------- Scene 3: Split Slider ---------- */
.sim-split-wrap {
  position: relative;
  max-width: 800px;
  margin: 0 auto 32px;
  aspect-ratio: 16 / 10;
  border-radius: 16px;
  overflow: hidden;
  background: #0a1628;
  box-shadow: 0 8px 40px rgba(0,0,0,0.2);
  cursor: col-resize;
  touch-action: none;
}
.sim-split-layer {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.sim-split-layer.active-tb {
  clip-path: inset(0 50% 0 0);
  transition: clip-path 0.05s linear;
}
.sim-split-divider {
  position: absolute;
  top: 0; bottom: 0;
  left: 50%;
  width: 4px;
  background: #fff;
  transform: translateX(-50%);
  z-index: 10;
  pointer-events: none;
  box-shadow: 0 0 12px rgba(255,255,255,0.4);
}
.sim-split-handle {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 36px; height: 36px;
  border-radius: 50%;
  background: #fff;
  z-index: 11;
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--gray-500, #9ca3af);
  box-shadow: 0 2px 12px rgba(0,0,0,0.3);
}
.sim-split-label {
  position: absolute;
  top: 16px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 6px 14px;
  border-radius: 8px;
  z-index: 5;
  pointer-events: none;
}
.sim-split-label.left {
  left: 16px;
  background: rgba(19,117,71,0.85);
  color: #fff;
}
.sim-split-label.right {
  right: 16px;
  background: rgba(220,38,38,0.85);
  color: #fff;
}

/* Info panels for Scene 3 */
.sim-info-panels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  max-width: 800px;
  margin: 0 auto;
}
.sim-info-panel {
  padding: 20px 24px;
  border-radius: 12px;
  background: #fff;
  border: 1px solid rgba(0,0,0,0.06);
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.sim-info-panel.latent { border-left: 4px solid var(--green-700, #137547); }
.sim-info-panel.active-tb-panel { border-left: 4px solid #dc2626; }
.sim-info-panel h4 {
  font-size: 0.9375rem;
  margin-bottom: 12px;
  color: var(--dark, #111827);
}
.sim-info-row {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  font-size: 0.8125rem;
  border-bottom: 1px solid rgba(0,0,0,0.04);
}
.sim-info-row:last-child { border-bottom: none; }
.sim-info-key { color: var(--gray-500, #9ca3af); }
.sim-info-val { font-weight: 600; color: var(--dark, #111827); }

/* ---------- Scene 4: Timeline Scrubber ---------- */
.sim-timeline-wrap {
  max-width: 800px;
  margin: 0 auto 24px;
  padding: 0 20px;
}
.sim-timeline-track {
  position: relative;
  height: 8px;
  background: var(--gray-200, #e5e7eb);
  border-radius: 4px;
  margin: 40px 0 32px;
  cursor: pointer;
}
.sim-timeline-fill {
  height: 100%;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--green-700, #137547), #22c55e);
  width: 0%;
  transition: width 0.1s linear;
}
.sim-timeline-thumb {
  position: absolute;
  top: 50%;
  left: 0%;
  transform: translate(-50%, -50%);
  width: 24px; height: 24px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--green-700, #137547);
  cursor: grab;
  z-index: 5;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
  transition: left 0.1s linear;
}
.sim-timeline-thumb:active { cursor: grabbing; }
.sim-timeline-months {
  display: flex;
  justify-content: space-between;
  margin-top: 8px;
}
.sim-timeline-month {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--gray-400, #9ca3af);
  text-align: center;
}
.sim-timeline-month.active { color: var(--green-700, #137547); }
.sim-timeline-phases {
  display: flex;
  margin-bottom: 8px;
}
.sim-timeline-phase {
  padding: 6px 12px;
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-radius: 6px;
}
.sim-timeline-phase.intensive {
  flex: 2;
  background: rgba(234,88,12,0.1);
  color: #ea580c;
}
.sim-timeline-phase.continuation {
  flex: 4;
  background: rgba(19,117,71,0.1);
  color: var(--green-700, #137547);
}

/* Bacteria counter */
.sim-bacteria-count {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 10px 16px;
  border-radius: 10px;
  background: rgba(0,0,0,0.7);
  color: #fff;
  font-size: 0.8125rem;
  font-weight: 600;
  z-index: 5;
  pointer-events: none;
}
.sim-bacteria-num {
  font-size: 1.5rem;
  font-weight: 800;
  color: #ea580c;
  display: block;
}

/* ---------- Scene 5: Comparison ---------- */
.sim-compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: 900px;
  margin: 0 auto;
}
.sim-compare-card {
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(0,0,0,0.06);
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
  background: #fff;
}
.sim-compare-visual {
  position: relative;
  aspect-ratio: 4/3;
  background: #0a1628;
  overflow: hidden;
}
.sim-compare-visual svg {
  width: 100%;
  height: 100%;
}
.sim-compare-visual canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}
.sim-compare-body { padding: 20px 24px; }
.sim-compare-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 6px;
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 12px;
}
.sim-compare-badge.cured { background: rgba(19,117,71,0.1); color: var(--green-700, #137547); }
.sim-compare-badge.resistant { background: rgba(220,38,38,0.1); color: #dc2626; }
.sim-compare-card h3 {
  font-size: 1.125rem;
  margin-bottom: 12px;
  color: var(--dark, #111827);
}
.sim-compare-stats {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.sim-compare-stat {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid rgba(0,0,0,0.04);
  font-size: 0.8125rem;
}
.sim-compare-stat:last-child { border-bottom: none; }
.sim-stat-key { color: var(--gray-500, #9ca3af); }
.sim-stat-val { font-weight: 700; }
.sim-stat-val.good { color: var(--green-700, #137547); }
.sim-stat-val.bad { color: #dc2626; }

/* ---------- Scene Navigation Buttons ---------- */
.sim-scene-nav {
  display: flex;
  justify-content: space-between;
  max-width: 800px;
  margin: 40px auto 0;
  padding-top: 24px;
  border-top: 1px solid rgba(0,0,0,0.06);
}
.sim-nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  border-radius: 10px;
  border: 2px solid var(--gray-200, #e5e7eb);
  background: #fff;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--gray-600, #6b7280);
  cursor: pointer;
  transition: all 0.3s;
}
.sim-nav-btn:hover {
  border-color: var(--gray-400, #9ca3af);
  color: var(--dark, #111827);
}
.sim-nav-btn.primary {
  background: var(--green-700, #137547);
  border-color: var(--green-700, #137547);
  color: #fff;
}
.sim-nav-btn.primary:hover {
  background: #0f5a36;
  border-color: #0f5a36;
}

/* ---------- Adherence Warning ---------- */
.sim-warning {
  margin-top: 16px;
  padding: 14px 18px;
  border-radius: 10px;
  background: rgba(220,38,38,0.06);
  border: 1px solid rgba(220,38,38,0.2);
  color: #dc2626;
  font-size: 0.875rem;
  font-weight: 500;
  display: none;
}
.sim-warning.show { display: block; animation: simEnter 0.4s ease; }

/* ---------- Reduced Motion ---------- */
@media (prefers-reduced-motion: reduce) {
  .sim-scene.active { animation: none; opacity: 1; }
  .sim-viewport canvas { display: none; }
  .sim-start-btn { transition: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .sim-hero { padding: 120px 0 60px; }
  .sim-viewport { aspect-ratio: 4 / 3; border-radius: 12px; }
  .sim-controls { padding: 18px 16px; }
  .sim-control-row { flex-direction: column; align-items: flex-start; gap: 8px; }
  .sim-control-label { min-width: auto; }
  .sim-slider { width: 100%; }
  .sim-nav-item span.sim-nav-title { display: none; }
  .sim-info-panels { grid-template-columns: 1fr; }
  .sim-compare-grid { grid-template-columns: 1fr; }
  .sim-split-wrap { aspect-ratio: 4 / 3; }
}
@media (max-width: 480px) {
  .sim-hero h1 { font-size: 1.75rem; }
  .sim-viewport { border-radius: 0; margin-left: -16px; margin-right: -16px; max-width: calc(100% + 32px); }
  .sim-controls { border-radius: 12px; margin: 0 -8px; }
  .sim-scene-nav { flex-direction: column; gap: 10px; }
  .sim-nav-btn { justify-content: center; }
}