/* ==========================================================
   AI INFRASTRUCTURE SERIES - EPISODE 5: GPU vs TPU vs CPU
   Aesthetics: Deep Obsidian, Electric Cyan, Google Blue, NVIDIA Green
   ========================================================== */

:root {
  --bg-base: #07090f;
  --bg-surface: #0e1424;
  --bg-surface-elevated: #162038;
  --border-subtle: rgba(255, 255, 255, 0.08);
  
  --nvidia-green: #10b981;
  --tpu-blue: #3b82f6;
  --tpu-red: #ef4444;
  --tpu-yellow: #f59e0b;
  --intel-blue: #38bdf8;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'Fira Code', monospace;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: var(--bg-base);
  color: var(--text-main);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

/* Ambient Glow Orbs */
.glow-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.22;
}
.orb-1 { width: 600px; height: 600px; background: radial-gradient(circle, #3b82f6, transparent 70%); top: -200px; left: -100px; }
.orb-2 { width: 700px; height: 700px; background: radial-gradient(circle, #10b981, transparent 70%); bottom: -250px; right: -150px; }
.orb-3 { width: 450px; height: 450px; background: radial-gradient(circle, #f59e0b, transparent 70%); top: 40%; left: 60%; opacity: 0.15; }

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

.app-container {
  position: relative;
  width: 100vw;
  height: 100vh;
  display: flex;
  flex-direction: column;
  z-index: 1;
}

/* ==========================================================
   TOP NAV HUD
   ========================================================== */
.top-nav {
  height: 64px;
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(10, 15, 26, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 10;
}

.nav-left { display: flex; align-items: center; gap: 14px; }

.hub-back-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 10px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  text-decoration: none;
  font-size: 12px;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.hub-back-btn:hover { background: rgba(255, 255, 255, 0.12); color: #fff; }

.series-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: #60a5fa;
}

.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #3b82f6;
  box-shadow: 0 0 10px #3b82f6;
  animation: pulseDot 2s infinite;
}

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

.ep-tag {
  background: rgba(255, 255, 255, 0.12);
  padding: 2px 6px;
  border-radius: 4px;
  color: #fff;
}

.nav-topic-title {
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 600;
  color: var(--text-muted);
}

.nav-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.timeline-indicator {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
}

.timeline-bar {
  width: 180px;
  height: 5px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  overflow: hidden;
  position: relative;
}

.timeline-fill {
  width: 14%;
  height: 100%;
  background: linear-gradient(90deg, #3b82f6, #10b981);
  border-radius: 999px;
  transition: width 0.3s ease;
}

.slide-dots { display: flex; gap: 8px; }

.slide-dot-item {
  width: 24px;
  height: 4px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.15);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.slide-dot-item.active {
  background: #3b82f6;
  box-shadow: 0 0 8px rgba(59, 130, 246, 0.7);
  width: 32px;
}

.nav-right { display: flex; align-items: center; gap: 10px; }

.nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.nav-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

.nav-btn.active-btn {
  background: rgba(59, 130, 246, 0.15);
  border-color: var(--tpu-blue);
  color: #60a5fa;
}

.shortcut-pill {
  padding: 1px 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-muted);
}

/* ==========================================================
   PRESENTATION STAGE & SLIDES
   ========================================================== */
.presentation-stage {
  flex: 1;
  position: relative;
  overflow: hidden;
  display: flex;
}

.slide-view {
  position: absolute;
  inset: 0;
  padding: 36px 64px 80px 64px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transform: translateX(40px) scale(0.98);
  transition: opacity 0.45s cubic-bezier(0.16, 1, 0.3, 1), transform 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}

.slide-view.active { opacity: 1; pointer-events: auto; transform: translateX(0) scale(1); }
.slide-view.prev-out { transform: translateX(-40px) scale(0.98); opacity: 0; }

.badge-tag {
  display: inline-flex;
  align-items: center;
  padding: 5px 12px;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}
.badge-tag.gpu-accent { background: rgba(16, 185, 129, 0.12); color: var(--nvidia-green); border: 1px solid rgba(16, 185, 129, 0.3); }
.badge-tag.tpu-accent { background: rgba(59, 130, 246, 0.12); color: var(--tpu-blue); border: 1px solid rgba(59, 130, 246, 0.3); }
.badge-tag.cpu-accent { background: rgba(56, 189, 248, 0.12); color: var(--intel-blue); border: 1px solid rgba(56, 189, 248, 0.3); }
.badge-tag.decision-accent { background: rgba(245, 158, 11, 0.12); color: var(--tpu-yellow); border: 1px solid rgba(245, 158, 11, 0.3); }
.badge-tag.matrix-accent { background: rgba(168, 85, 247, 0.12); color: #c084fc; border: 1px solid rgba(168, 85, 247, 0.3); }
.badge-tag.finale-accent { background: rgba(244, 63, 94, 0.12); color: #fb7185; border: 1px solid rgba(244, 63, 94, 0.3); }

.slide-title {
  font-family: var(--font-heading);
  font-size: 38px;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 14px;
  color: #fff;
  letter-spacing: -0.02em;
}

.gradient-text {
  background: linear-gradient(135deg, #ffffff 30%, #38bdf8 70%, #10b981 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.slide-subtitle {
  font-size: 17px;
  line-height: 1.6;
  color: var(--text-muted);
  max-width: 900px;
}

/* ==========================================================
   SLIDE 1: CONTENDERS GRID
   ========================================================== */
.hero-layout {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  max-width: 1100px;
  margin: 0 auto;
  gap: 28px;
}

.hook-pill {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.3);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 12px;
}

.contenders-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  width: 100%;
}

.contender-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 26px 20px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  transition: transform var(--transition-smooth);
}

.contender-card:hover { transform: translateY(-4px); }

.gpu-card { border-color: rgba(16, 185, 129, 0.35); }
.tpu-card { border-color: rgba(59, 130, 246, 0.35); }
.cpu-card { border-color: rgba(56, 189, 248, 0.35); }

.c-badge {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
}
.c-badge.nvidia { background: rgba(16, 185, 129, 0.15); color: #34d399; }
.c-badge.google { background: rgba(59, 130, 246, 0.15); color: #60a5fa; }
.c-badge.intel { background: rgba(56, 189, 248, 0.15); color: #38bdf8; }

.c-icon { font-size: 32px; }
.contender-card h3 { font-family: var(--font-heading); font-size: 20px; font-weight: 700; }
.contender-card p { font-size: 13px; color: var(--text-muted); line-height: 1.5; flex: 1; }

.c-rate {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  padding: 6px 12px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 6px;
  color: #fff;
}

.rhetorical-callout {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 24px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  font-size: 15px;
  color: var(--text-main);
}

/* ==========================================================
   SPLIT LAYOUTS (SLIDES 2, 3, 5)
   ========================================================== */
.split-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.analogy-lead {
  font-size: 18px;
  line-height: 1.6;
  color: #e2e8f0;
  margin-bottom: 24px;
  background: rgba(255, 255, 255, 0.03);
  padding: 16px 20px;
  border-left: 3px solid #10b981;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.slide-3 .analogy-lead { border-left-color: var(--tpu-blue); }
.slide-5 .analogy-lead { border-left-color: var(--intel-blue); }

.feature-bullets { display: flex; flex-direction: column; gap: 14px; }
.bullet-item { display: flex; align-items: flex-start; gap: 14px; font-size: 15px; line-height: 1.5; color: var(--text-muted); }
.bullet-item strong { color: #fff; }
.bullet-icon { font-size: 20px; }

.visual-chip-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.gpu-diagram-card { border-color: rgba(16, 185, 129, 0.35); }
.tpu-diagram-card { border-color: rgba(59, 130, 246, 0.35); }
.cpu-amx-card { border-color: rgba(56, 189, 248, 0.35); }

.chip-diagram-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 11px;
}

.die-label { color: var(--text-muted); font-weight: 600; }
.clock-badge { background: rgba(16, 185, 129, 0.15); color: #34d399; padding: 3px 8px; border-radius: 4px; font-weight: 700; }
.clock-badge.tpu-badge { background: rgba(59, 130, 246, 0.15); color: #60a5fa; }
.clock-badge.cpu-badge { background: rgba(56, 189, 248, 0.15); color: #38bdf8; }

/* GPU Stack */
.gpu-software-stack { display: flex; flex-direction: column; gap: 8px; }
.stack-layer {
  padding: 10px 14px;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  text-align: center;
}
.app-l { background: rgba(255, 255, 255, 0.05); color: var(--text-main); }
.fw-l { background: rgba(168, 85, 247, 0.15); color: #c084fc; }
.cuda-l { background: rgba(16, 185, 129, 0.15); color: #34d399; font-weight: 700; }
.hw-l { background: rgba(6, 182, 212, 0.15); color: #38bdf8; }

/* Systolic Visual */
.systolic-matrix-visual { display: flex; flex-direction: column; gap: 14px; align-items: center; }
.systolic-grid {
  display: grid;
  grid-template-columns: repeat(5, auto);
  gap: 8px;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
}
.s-cell {
  padding: 8px 12px;
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: 4px;
  color: #60a5fa;
  font-weight: 700;
}
.no-mem-banner {
  font-family: var(--font-mono);
  font-size: 10px;
  color: #34d399;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.25);
  padding: 4px 10px;
  border-radius: 4px;
}

/* CPU AMX Visual */
.cpu-amx-diagram { display: flex; flex-direction: column; gap: 12px; }
.cpu-socket-box {
  background: #050810;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.sock-title { font-family: var(--font-mono); font-size: 11px; color: var(--text-dim); }
.amx-tiles-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }
.amx-core {
  background: rgba(255, 255, 255, 0.04);
  padding: 8px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.amx-chip { background: rgba(56, 189, 248, 0.2); color: #38bdf8; padding: 2px 6px; border-radius: 3px; font-weight: 700; }
.ram-bus {
  background: rgba(245, 158, 11, 0.1);
  border: 1px dashed rgba(245, 158, 11, 0.3);
  padding: 8px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: #fcd34d;
  text-align: center;
}

.analogy-caption {
  margin-top: 14px;
  font-size: 13px;
  color: var(--text-muted);
  font-style: italic;
  text-align: center;
}

/* ==========================================================
   SLIDE 4: INTERACTIVE TCO & HARDWARE SELECTOR
   ========================================================== */
.interactive-layout {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
}

.decision-arena {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 24px 32px;
  align-items: center;
}

.decision-inputs { display: flex; flex-direction: column; gap: 16px; }

.input-group { display: flex; flex-direction: column; gap: 6px; }
.input-group label { font-size: 13px; font-weight: 600; color: var(--text-muted); }
.input-group select {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-subtle);
  color: #fff;
  border-radius: 6px;
  padding: 10px 12px;
  font-family: var(--font-body);
  font-size: 13px;
  cursor: pointer;
}

.decision-output-card {
  background: #060912;
  border: 1px solid rgba(59, 130, 246, 0.35);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  transition: all 0.3s ease;
}

.rec-header { display: flex; flex-direction: column; gap: 4px; }
.rec-badge { font-family: var(--font-mono); font-size: 10px; font-weight: 700; color: #38bdf8; letter-spacing: 0.05em; }
.rec-name { font-family: var(--font-heading); font-size: 22px; font-weight: 800; color: #fff; }

.rec-stats-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.rec-stat { display: flex; flex-direction: column; gap: 2px; }
.rec-stat .label { font-family: var(--font-mono); font-size: 11px; color: var(--text-dim); }
.cost-num { font-family: var(--font-mono); font-size: 18px; color: #34d399; }
.latency-tier { font-family: var(--font-mono); font-size: 13px; color: #fcd34d; }

.rec-rationale { font-size: 13px; line-height: 1.55; color: var(--text-muted); }

.interactive-insight {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 20px;
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.25);
  border-radius: var(--radius-md);
  font-size: 14px;
  color: #fed7aa;
}
.insight-icon { font-size: 24px; }

/* ==========================================================
   SLIDE 6: SHOWDOWN COMPARISON TABLE
   ========================================================== */
.comparison-layout {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
}

.comparison-table-wrapper {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.tech-table { width: 100%; border-collapse: collapse; text-align: left; }
.tech-table th, .tech-table td { padding: 16px 20px; font-size: 14px; border-bottom: 1px solid var(--border-subtle); }
.tech-table th {
  background: rgba(255, 255, 255, 0.03);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.tech-table tbody tr:hover { background: rgba(255, 255, 255, 0.02); }

.highlight-green { color: #34d399; font-weight: 700; }
.highlight-cyan { color: #38bdf8; font-weight: 700; }

/* ==========================================================
   SLIDE 7: FINALE & EPISODE 6 TEASER
   ========================================================== */
.wrapup-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
}

.summary-cards-stack { display: flex; flex-direction: column; gap: 14px; margin-top: 18px; }
.sum-card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px 20px;
}
.sum-number {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(59, 130, 246, 0.15);
  color: #60a5fa;
  font-family: var(--font-mono);
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.sum-card h4 { font-size: 16px; font-weight: 700; margin-bottom: 4px; }
.sum-card p { font-size: 13px; color: var(--text-muted); line-height: 1.4; }

.teaser-card {
  background: linear-gradient(135deg, rgba(244, 63, 94, 0.1) 0%, rgba(14, 20, 36, 0.95) 100%);
  border: 1px solid rgba(244, 63, 94, 0.35);
  border-radius: var(--radius-xl);
  padding: 32px;
  box-shadow: 0 15px 40px -10px rgba(244, 63, 94, 0.2);
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.teaser-badge { font-family: var(--font-mono); font-size: 11px; font-weight: 700; color: #fb7185; letter-spacing: 0.08em; }
.teaser-title { font-family: var(--font-heading); font-size: 24px; font-weight: 800; line-height: 1.25; color: #fff; }
.teaser-desc { font-size: 14px; line-height: 1.6; color: var(--text-muted); }

.network-clash-tags { display: flex; flex-direction: column; gap: 6px; }
.net-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 6px 12px;
  border-radius: 6px;
}
.ib-tag { background: rgba(56, 189, 248, 0.15); color: #38bdf8; border: 1px solid rgba(56, 189, 248, 0.3); }
.rdma-tag { background: rgba(16, 185, 129, 0.15); color: #34d399; border: 1px solid rgba(16, 185, 129, 0.3); }
.allreduce-tag { background: rgba(245, 158, 11, 0.15); color: #fcd34d; border: 1px solid rgba(245, 158, 11, 0.3); }

.teaser-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
}
.series-countdown { font-family: var(--font-mono); font-size: 10px; color: var(--text-dim); }

.next-series-btn {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--border-subtle);
  color: #fff;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.next-series-btn:hover { background: #fff; color: #000; }

/* ==========================================================
   BOTTOM CONTROLS BAR & SCRIPT DRAWER
   ========================================================== */
.bottom-controls {
  height: 56px;
  background: rgba(10, 15, 26, 0.9);
  backdrop-filter: blur(16px);
  border-top: 1px solid var(--border-subtle);
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 10;
}

.controls-left, .controls-center, .controls-right { display: flex; align-items: center; gap: 12px; }

.ctrl-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.ctrl-btn:hover:not(:disabled) { background: rgba(255, 255, 255, 0.12); border-color: rgba(255, 255, 255, 0.25); }
.ctrl-btn:disabled { opacity: 0.35; cursor: not-allowed; }

.play-pause-btn { background: rgba(59, 130, 246, 0.15); border-color: rgba(59, 130, 246, 0.3); color: #60a5fa; }
.play-pause-btn:hover { background: rgba(59, 130, 246, 0.25); }

.slide-counter { font-family: var(--font-mono); font-size: 12px; color: var(--text-muted); min-width: 85px; text-align: center; }
.keyboard-hints { display: flex; align-items: center; gap: 10px; font-size: 12px; color: var(--text-dim); }
.key-tag { font-family: var(--font-mono); font-size: 11px; padding: 2px 6px; background: rgba(255, 255, 255, 0.08); border-radius: 4px; color: var(--text-muted); }

.script-drawer {
  position: absolute;
  bottom: 56px;
  right: 28px;
  width: 480px;
  max-height: 480px;
  background: rgba(14, 20, 36, 0.95);
  backdrop-filter: blur(24px);
  border: 1px solid rgba(59, 130, 246, 0.35);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  transform: translateY(20px);
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 20;
}
.script-drawer.open { transform: translateY(0); opacity: 1; pointer-events: auto; }

.drawer-header {
  padding: 14px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(0, 0, 0, 0.2);
}
.drawer-title-box { display: flex; align-items: center; gap: 10px; }
.drawer-title-box h3 { font-family: var(--font-heading); font-size: 15px; font-weight: 700; color: #fff; }

.slide-target-time { font-family: var(--font-mono); font-size: 11px; background: rgba(59, 130, 246, 0.15); color: #60a5fa; padding: 2px 6px; border-radius: 4px; }
.drawer-actions { display: flex; align-items: center; gap: 10px; }
.voice-speed-selector { display: flex; align-items: center; gap: 6px; font-size: 11px; color: var(--text-muted); }
.voice-speed-selector select { background: rgba(255, 255, 255, 0.08); border: 1px solid var(--border-subtle); color: #fff; border-radius: 4px; font-size: 11px; padding: 2px 4px; }
.drawer-icon-btn { background: transparent; border: none; color: var(--text-dim); font-size: 16px; cursor: pointer; }

.drawer-body { padding: 20px; overflow-y: auto; display: flex; flex-direction: column; gap: 14px; }
.script-meta-strip { display: flex; justify-content: space-between; font-size: 12px; color: var(--text-dim); font-family: var(--font-mono); }
.script-voice-text { font-size: 15px; line-height: 1.65; color: #e2e8f0; white-space: pre-line; }
.presenter-tips-box { font-size: 12px; line-height: 1.5; background: rgba(59, 130, 246, 0.08); border-left: 3px solid var(--tpu-blue); padding: 10px 14px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; color: #bfdbfe; }

.hidden { display: none !important; }

@media (max-width: 1024px) {
  .split-layout, .wrapup-layout, .contenders-grid, .decision-arena { grid-template-columns: 1fr; gap: 24px; }
  .visual-chip-card, .teaser-card { display: none; }
  .script-drawer { width: 90vw; right: 5vw; }
}

/* ==========================================================
   CLEAN RECORDING MODE: Hide presenter tools & dev hints
   ========================================================== */
#btnScriptToggle,
#btnAudioRehearse,
.keyboard-hints,
.controls-center {
  display: none !important;
}