/* Episode 9: Scaling from 1 GPU to 1,000 GPUs - Custom Styling */
:root {
  --bg-dark: #080912;
  --bg-card: rgba(15, 18, 28, 0.78);
  --bg-card-hover: rgba(22, 28, 44, 0.9);
  --border-color: rgba(255, 255, 255, 0.08);

  --cyan-tp: #00f5ff;
  --cyan-glow: rgba(0, 245, 255, 0.25);
  --violet-pp: #a855f7;
  --violet-glow: rgba(168, 85, 247, 0.25);
  --emerald-dp: #10b981;
  --emerald-glow: rgba(16, 185, 129, 0.25);
  --nv-green: #76b900;
  --red-alert: #ef4444;
  --amber-warn: #f59e0b;

  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Space Grotesk', var(--font-sans);
  --font-mono: 'JetBrains Mono', monospace;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-sans);
  min-height: 100vh;
  overflow: hidden;
  background-image:
    radial-gradient(circle at 15% 15%, rgba(0, 245, 255, 0.05) 0%, transparent 40%),
    radial-gradient(circle at 85% 85%, rgba(168, 85, 247, 0.05) 0%, transparent 45%),
    linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 48px 48px, 48px 48px;
}

.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
  position: relative;
}

/* TOP NAVIGATION */
.top-nav {
  height: 64px;
  background: rgba(10, 12, 22, 0.88);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  z-index: 50;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 18px;
}

.back-hub-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  transition: all 0.2s ease;
}

.back-hub-btn:hover {
  color: var(--cyan-tp);
  border-color: var(--cyan-tp);
  background: rgba(0, 245, 255, 0.08);
}

.series-tag {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan-tp);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan-tp);
  box-shadow: 0 0 10px var(--cyan-tp);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.nav-center .current-slide-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  color: #fff;
  letter-spacing: 0.02em;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.hud-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.hud-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 500;
  padding: 6px 10px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.hud-btn:hover, .hud-btn.active {
  color: #fff;
  border-color: var(--cyan-tp);
  background: rgba(0, 245, 255, 0.12);
}

.slide-counter-badge {
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 4px 10px;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--cyan-tp);
}

/* SLIDE VIEWPORT */
.slide-viewport {
  flex: 1;
  position: relative;
  overflow: hidden;
}

.slide {
  position: absolute;
  inset: 0;
  padding: 32px 48px;
  opacity: 0;
  pointer-events: none;
  transform: translateX(40px);
  transition: opacity 0.35s ease, transform 0.35s ease;
  overflow-y: auto;
  display: flex;
  align-items: center;
  justify-content: center;
}

.slide.active {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(0);
}

.slide-inner {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
}

/* TYPOGRAPHY */
.section-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--cyan-tp);
  text-transform: uppercase;
  margin-bottom: 8px;
  display: inline-block;
}

.tp-tag { color: var(--cyan-tp) !important; }
.pp-tag { color: var(--violet-pp) !important; }
.zero-tag { color: var(--emerald-dp) !important; }

.slide h2 {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
  line-height: 1.2;
}

.slide-desc {
  color: var(--text-muted);
  font-size: 15px;
  max-width: 820px;
  margin-bottom: 28px;
  line-height: 1.5;
}

.cyan-gradient {
  background: linear-gradient(135deg, var(--cyan-tp) 0%, #3b82f6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.emerald-gradient {
  background: linear-gradient(135deg, var(--emerald-dp) 0%, #a3e635 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-cyan { color: var(--cyan-tp) !important; }
.text-violet { color: var(--violet-pp) !important; }
.text-green { color: var(--emerald-dp) !important; }
.text-red { color: var(--red-alert) !important; }
.text-amber { color: var(--amber-warn) !important; }
.text-nv { color: var(--nv-green) !important; }

/* SLIDE 1: HERO MONOLITH */
.hero-header {
  text-align: center;
  margin-bottom: 30px;
}

.hero-pill {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  margin-bottom: 12px;
  background: rgba(0, 245, 255, 0.1);
  border: 1px solid rgba(0, 245, 255, 0.3);
  color: var(--cyan-tp);
}

.glitch-title {
  font-family: var(--font-display);
  font-size: 42px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 10px;
}

.hero-subtitle {
  color: var(--text-muted);
  font-size: 16px;
  max-width: 780px;
  margin: 0 auto;
}

.monolith-hero-stage {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 24px;
}

.deficit-breakdown-card, .cube-concept-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  backdrop-filter: blur(12px);
}

.deficit-breakdown-card {
  border-color: rgba(239, 68, 68, 0.35);
  box-shadow: 0 10px 30px -10px rgba(239, 68, 68, 0.15);
}

.cube-concept-card {
  border-color: rgba(0, 245, 255, 0.35);
  box-shadow: 0 10px 30px -10px rgba(0, 245, 255, 0.15);
}

.card-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  margin-bottom: 4px;
}

.alert-tag { color: var(--red-alert); }
.cube-tag { color: var(--cyan-tp); }

.deficit-breakdown-card h3, .cube-concept-card h3 {
  font-size: 18px;
  color: #fff;
  margin-bottom: 14px;
}

.memory-numbers-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.m-num-item {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  padding-bottom: 6px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.mn-k { color: var(--text-muted); }
.mn-v { font-weight: 600; font-family: var(--font-mono); }

.highlight-total {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 8px;
  font-size: 14px;
}

.highlight-total .mn-k { color: #fff; font-weight: 700; }

.chassis-limit-box {
  background: rgba(0, 0, 0, 0.4);
  border-radius: 8px;
  padding: 12px;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.chassis-row {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.chassis-deficit {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
}

.cube-visual-box {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
}

.axis-dimension {
  background: rgba(0, 0, 0, 0.35);
  border-radius: 6px;
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  border-left: 3px solid #fff;
}

.axis-x { border-left-color: var(--cyan-tp); }
.axis-y { border-left-color: var(--violet-pp); }
.axis-z { border-left-color: var(--emerald-dp); }

.axis-badge {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
}

.x-badge { color: var(--cyan-tp); }
.y-badge { color: var(--violet-pp); }
.z-badge { color: var(--emerald-dp); }

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

.cube-equation-box {
  background: rgba(0, 0, 0, 0.4);
  border-radius: 6px;
  padding: 10px;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.cube-equation-box code {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  display: block;
  margin-bottom: 4px;
}

.cube-note {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--cyan-tp);
}

/* SLIDE 2: TENSOR PARALLELISM */
.tp-mechanics-view {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 24px;
}

.tp-split-diagram {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.matrix-split-box {
  background: rgba(0, 245, 255, 0.08);
  border: 1px solid var(--cyan-tp);
  padding: 12px 20px;
  border-radius: 8px;
  text-align: center;
  width: 90%;
}

.m-title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--cyan-tp);
  margin-bottom: 4px;
}

.x-tensor {
  font-family: var(--font-mono);
  font-size: 12px;
  color: #fff;
}

.split-operator {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
  font-weight: 700;
}

.gpu-split-columns {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  width: 100%;
}

.column-slice {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 6px;
  padding: 10px 8px;
  text-align: center;
}

.slice-label {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
  display: block;
  margin-bottom: 6px;
}

.slice-bar.tp-c {
  background: rgba(0, 245, 255, 0.15);
  border: 1px solid var(--cyan-tp);
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  padding: 6px 2px;
  border-radius: 4px;
  margin-bottom: 6px;
}

.slice-out {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--cyan-tp);
}

.allreduce-barrier-banner {
  background: rgba(0, 245, 255, 0.1);
  border: 1px dashed var(--cyan-tp);
  border-radius: 6px;
  padding: 10px;
  width: 100%;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  color: var(--cyan-tp);
}

.tp-rules-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  justify-content: center;
}

.tp-rules-card h4 {
  font-size: 16px;
  color: #fff;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 8px;
}

.rule-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.4;
}

.rule-item strong { color: #fff; }
.r-check { color: var(--emerald-dp); font-weight: 700; }
.r-warn { color: var(--red-alert); font-weight: 700; }

/* SLIDE 3: PIPELINE PARALLELISM */
.pp-pipeline-view {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.pipeline-racks-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(0, 0, 0, 0.35);
  border-radius: 8px;
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.rack-stage {
  flex: 1;
  background: rgba(168, 85, 247, 0.08);
  border: 1px solid var(--violet-pp);
  border-radius: 6px;
  padding: 12px;
  text-align: center;
}

.stage-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--violet-pp);
  font-weight: 700;
  margin-bottom: 4px;
}

.layers-box {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}

.stage-io {
  font-size: 10px;
  color: var(--text-dim);
}

.pipe-arrow {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
  padding: 0 6px;
}

.bubble-explainer-card {
  background: rgba(0, 0, 0, 0.4);
  border-radius: 8px;
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.bubble-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.bubble-header h4 { font-size: 14px; color: #fff; }
.bubble-stat { font-family: var(--font-mono); font-size: 11px; font-weight: 700; }

.schedule-timeline {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 12px;
}

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

.node-id {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
  width: 60px;
}

.microbatch-blocks {
  display: flex;
  gap: 4px;
  flex: 1;
}

.mb {
  padding: 3px 8px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
}

.mb.f { background: rgba(0, 245, 255, 0.2); color: var(--cyan-tp); border: 1px solid var(--cyan-tp); }
.mb.b { background: rgba(168, 85, 247, 0.2); color: var(--violet-pp); border: 1px solid var(--violet-pp); }

.bubble-caption {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.4;
}

/* SLIDE 4: SIMULATOR */
.sim-container {
  display: grid;
  grid-template-columns: 1.1fr 1.3fr;
  gap: 24px;
  background: var(--bg-card);
  border: 1px solid var(--cyan-glow);
  box-shadow: 0 0 30px rgba(0, 245, 255, 0.06);
  border-radius: 12px;
  padding: 24px;
}

.sim-controls-panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
  border-right: 1px solid rgba(255, 255, 255, 0.08);
  padding-right: 24px;
}

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

.sim-control-group label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.btn-toggle-group {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.toggle-btn {
  flex: 1;
  min-width: 80px;
  padding: 7px 8px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 500;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: var(--font-sans);
}

.toggle-btn:hover {
  border-color: rgba(0, 245, 255, 0.4);
  color: #fff;
}

.toggle-btn.active {
  background: rgba(0, 245, 255, 0.15);
  border-color: var(--cyan-tp);
  color: #fff;
  font-weight: 600;
  box-shadow: 0 0 10px rgba(0, 245, 255, 0.2);
}

.slider-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.slider-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--cyan-tp);
  background: rgba(0, 245, 255, 0.12);
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid var(--cyan-tp);
}

input[type="range"] {
  width: 100%;
  accent-color: var(--cyan-tp);
  cursor: pointer;
}

.control-hint {
  font-size: 10px;
  color: var(--text-dim);
}

.sim-display-panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.vram-meter-box {
  background: rgba(0, 0, 0, 0.4);
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  padding: 16px;
}

.vram-meter-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.vm-title {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
  letter-spacing: 0.08em;
}

.status-pill-ok {
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
  background: rgba(16, 185, 129, 0.15);
  color: var(--emerald-dp);
  border: 1px solid var(--emerald-dp);
  padding: 2px 8px;
  border-radius: 4px;
}

.status-pill-oom {
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
  background: rgba(239, 68, 68, 0.25);
  color: var(--red-alert);
  border: 1px solid var(--red-alert);
  padding: 2px 8px;
  border-radius: 4px;
  animation: pulse 1s infinite;
}

.stacked-bar-container {
  position: relative;
  height: 28px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 6px;
  margin-bottom: 12px;
}

.vram-bar-track {
  display: flex;
  height: 100%;
  border-radius: 6px;
  overflow: hidden;
}

.v-segment {
  height: 100%;
  transition: width 0.3s ease;
}

.seg-weights { background: #0284c7; }
.seg-optimizer { background: #8b5cf6; }
.seg-grads { background: #f59e0b; }
.seg-activations { background: #10b981; }

.vram-ceiling-line {
  position: absolute;
  top: -6px;
  bottom: -6px;
  left: 80%; /* 80GB marker */
  width: 2px;
  background: var(--red-alert);
  box-shadow: 0 0 6px var(--red-alert);
}

.ceiling-label {
  position: absolute;
  top: -16px;
  right: -24px;
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
  color: var(--red-alert);
  white-space: nowrap;
}

.vram-legend {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  font-size: 11px;
}

.leg-item {
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--text-muted);
}

.dot-swatch {
  width: 8px;
  height: 8px;
  border-radius: 2px;
  display: inline-block;
}

.w-dot { background: #0284c7; }
.o-dot { background: #8b5cf6; }
.g-dot { background: #f59e0b; }
.a-dot { background: #10b981; }

.leg-item strong { color: #fff; font-family: var(--font-mono); }

.sim-metrics-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.gauge-card {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 8px;
  padding: 12px 14px;
}

.g-label {
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.g-val {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  line-height: 1.1;
}

.g-sub {
  font-size: 10px;
  color: var(--text-dim);
  margin-top: 4px;
}

/* SLIDE 5: DEEPSPEED ZERO */
.zero-stages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.zero-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.zero-card.highlight-z3 {
  border-color: var(--cyan-tp);
  background: rgba(0, 245, 255, 0.05);
  box-shadow: 0 0 20px rgba(0, 245, 255, 0.15);
}

.z-stage-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  color: var(--text-dim);
  margin-bottom: 4px;
}

.highlight-z3 .z-stage-tag { color: var(--cyan-tp); }

.zero-card h4 {
  font-size: 14px;
  color: #fff;
  margin-bottom: 12px;
}

.z-blocks {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 12px;
}

.z-block {
  font-family: var(--font-mono);
  font-size: 10px;
  padding: 6px 8px;
  border-radius: 4px;
  text-align: center;
}

.w-block { background: rgba(2, 132, 199, 0.15); border: 1px solid #0284c7; color: #fff; }
.g-block { background: rgba(245, 158, 11, 0.15); border: 1px solid #f59e0b; color: #fff; }
.o-block { background: rgba(139, 92, 246, 0.15); border: 1px solid #8b5cf6; color: #fff; }

.z-block.sharded {
  background: repeating-linear-gradient(45deg, rgba(255,255,255,0.05), rgba(255,255,255,0.05) 5px, rgba(0,0,0,0.2) 5px, rgba(0,0,0,0.2) 10px);
  border-style: dashed;
}

.z-summary {
  font-size: 10px;
  font-family: var(--font-mono);
  line-height: 1.3;
}

/* SLIDE 6: HARDWARE MAPPING */
.mapping-hierarchy-view {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.tier-mapping-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 18px 24px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  border-left: 4px solid #fff;
}

.tier-1 { border-left-color: var(--cyan-tp); }
.tier-2 { border-left-color: var(--violet-pp); }
.tier-3 { border-left-color: var(--emerald-dp); }

.tier-num {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  color: var(--text-dim);
}

.tier-hardware {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
}

.tier-math {
  font-size: 14px;
  color: var(--text-main);
}

.tier-math strong { color: var(--cyan-tp); }

.tier-desc {
  font-size: 12px;
  color: var(--text-muted);
}

/* SLIDE 7: WRAP-UP */
.wrap-up-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
  margin-bottom: 24px;
}

.rule-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.rule-num {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 800;
  color: rgba(255, 255, 255, 0.15);
  line-height: 1;
  margin-bottom: 8px;
}

.rule-card h3 {
  font-size: 17px;
  color: #fff;
  margin-bottom: 8px;
}

.rule-card p {
  color: var(--text-muted);
  font-size: 13px;
  line-height: 1.4;
  margin-bottom: 14px;
}

.rule-stat {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.next-episode-teaser.finale-teaser {
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.15) 0%, rgba(245, 158, 11, 0.1) 100%);
  border: 1px solid var(--amber-warn);
  border-radius: 12px;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.finale-teaser .teaser-badge {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--amber-warn);
  margin-bottom: 4px;
  font-weight: 700;
}

.teaser-content h3 {
  font-size: 17px;
  color: #fff;
  margin-bottom: 4px;
}

.teaser-content p {
  color: var(--text-muted);
  font-size: 13px;
}

.teaser-pill.finale-pill {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 999px;
  background: linear-gradient(135deg, #f59e0b, #ef4444);
  color: #fff;
  box-shadow: 0 0 16px rgba(245, 158, 11, 0.4);
  white-space: nowrap;
}

/* BOTTOM BAR */
.bottom-bar {
  height: 64px;
  background: rgba(10, 12, 22, 0.9);
  backdrop-filter: blur(16px);
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  z-index: 50;
}

.nav-control-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
}

.nav-control-btn:hover {
  color: #fff;
  border-color: var(--cyan-tp);
  background: rgba(0, 245, 255, 0.08);
}

.nav-control-btn.next-primary {
  background: linear-gradient(135deg, var(--cyan-tp) 0%, #3b82f6 100%);
  color: #000;
  border: none;
  font-weight: 700;
  box-shadow: 0 0 16px rgba(0, 245, 255, 0.3);
}

.nav-control-btn.next-primary:hover {
  box-shadow: 0 0 24px rgba(0, 245, 255, 0.5);
}

.timeline-indicator .dot-track {
  display: flex;
  gap: 10px;
}

.step-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  border: none;
  cursor: pointer;
  transition: all 0.25s ease;
}

.step-dot:hover {
  background: rgba(0, 245, 255, 0.5);
  transform: scale(1.2);
}

.step-dot.active {
  background: var(--cyan-tp);
  box-shadow: 0 0 10px var(--cyan-tp);
  transform: scale(1.3);
}

/* PRESENTER HUD DRAWER */
.teleprompter-drawer {
  position: absolute;
  bottom: 64px;
  left: 24px;
  right: 24px;
  max-width: 900px;
  margin: 0 auto;
  background: rgba(8, 10, 18, 0.96);
  border: 1px solid rgba(0, 245, 255, 0.35);
  box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.8);
  border-radius: 12px 12px 0 0;
  z-index: 60;
  transform: translateY(110%);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  max-height: 260px;
}

.teleprompter-drawer.open {
  transform: translateY(0);
}

.drawer-header {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.drawer-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan-tp);
  font-weight: 700;
}

.pulse-mic {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--red-alert);
  box-shadow: 0 0 6px var(--red-alert);
}

.slide-cue-badge {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
  margin-right: 10px;
}

.close-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 14px;
}

.close-btn:hover { color: #fff; }

.drawer-body {
  padding: 14px 18px;
  overflow-y: auto;
  font-size: 14px;
  line-height: 1.6;
  color: #e5e7eb;
}

.drawer-body p {
  margin-bottom: 8px;
}

.drawer-body strong {
  color: var(--cyan-tp);
}

.drawer-footer {
  padding: 6px 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
}

.keys-legend {
  display: flex;
  gap: 14px;
}

kbd {
  background: rgba(255, 255, 255, 0.1);
  padding: 1px 5px;
  border-radius: 3px;
  color: #fff;
}

/* ==========================================================
   CLEAN RECORDING MODE: Hide presenter tools & dev hints
   ========================================================== */
#toggle-voice-btn,
#toggle-teleprompter-btn,
.keys-legend {
  display: none !important;
}