/* ==========================================================================
   FLOWKIT SYSTEMS — CINEMATIC SLIDE PRESENTATION STYLESHEET
   High-end Art Direction & Aesthetic for Film/TV Production Decision Makers
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS Custom Properties / Design Tokens
   -------------------------------------------------------------------------- */
:root {
  /* Color Palette - Deep Film Noir & Atmosphere */
  --bg-primary: #08080a;
  --bg-secondary: #0e0e13;
  --bg-elevated: #15151c;
  --bg-glass: rgba(18, 18, 24, 0.68);
  --bg-glass-hover: rgba(28, 28, 38, 0.85);
  
  /* Borders & Accents */
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.16);
  --border-gold: rgba(229, 169, 59, 0.35);
  --border-cyan: rgba(56, 189, 248, 0.3);

  /* Cinematic Accents */
  --gold-accent: #e5a93b;
  --gold-light: #f7d070;
  --gold-glow: rgba(229, 169, 59, 0.22);
  --cyan-accent: #38bdf8;
  --cyan-glow: rgba(56, 189, 248, 0.2);
  --red-rec: #ef4444;

  /* Typography Colors */
  --text-pure: #ffffff;
  --text-primary: #f0f0f4;
  --text-secondary: #a1a1aa;
  --text-muted: #646473;

  /* Typography Stacks */
  --font-heading: 'Syne', 'Space Grotesk', -apple-system, sans-serif;
  --font-serif: 'Cinzel', serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Space Grotesk', monospace;

  /* Layout & Transitions */
  --ease-cinematic: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 0.25s var(--ease-smooth);
  --transition-normal: 0.5s var(--ease-cinematic);
  --transition-slow: 0.85s var(--ease-cinematic);
}

/* --------------------------------------------------------------------------
   2. Reset & Global Base
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html, body {
  width: 100%;
  height: 100%;
  min-height: 100vh;
  min-height: 100dvh;
  overflow: hidden;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  user-select: none;
  -webkit-user-select: none;
}

/* --------------------------------------------------------------------------
   3. Ambient Lights, Film Grain & FX
   -------------------------------------------------------------------------- */
.film-grain {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 999;
  opacity: 0.038;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

.scanline-fx {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 998;
  background: linear-gradient(
    rgba(18, 16, 16, 0) 50%, 
    rgba(0, 0, 0, 0.15) 50%
  );
  background-size: 100% 4px;
  opacity: 0.45;
}

.ambient-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(140px);
  pointer-events: none;
  z-index: 1;
  transition: all 1.2s var(--ease-cinematic);
}

.ambient-glow-amber {
  top: -15%;
  right: -10%;
  width: 55vw;
  height: 55vw;
  background: radial-gradient(circle, var(--gold-glow) 0%, transparent 70%);
  opacity: 0.65;
  animation: pulseAmber 12s infinite alternate ease-in-out;
}

.ambient-glow-cyan {
  bottom: -20%;
  left: -10%;
  width: 60vw;
  height: 60vw;
  background: radial-gradient(circle, var(--cyan-glow) 0%, transparent 70%);
  opacity: 0.45;
  animation: pulseCyan 16s infinite alternate ease-in-out;
}

@keyframes pulseAmber {
  0% { transform: translate(0, 0) scale(1); opacity: 0.55; }
  100% { transform: translate(-5%, 6%) scale(1.15); opacity: 0.8; }
}

@keyframes pulseCyan {
  0% { transform: translate(0, 0) scale(1); opacity: 0.35; }
  100% { transform: translate(6%, -5%) scale(1.2); opacity: 0.6; }
}

/* --------------------------------------------------------------------------
   4. Viewport & 16:9 Frame Wrapper
   -------------------------------------------------------------------------- */
.presentation-viewport {
  position: relative;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  z-index: 10;
}

.cinematic-frame {
  position: relative;
  width: 100%;
  height: 100%;
  max-width: 1560px;
  max-height: 880px;
  aspect-ratio: 16 / 9;
  background: linear-gradient(145deg, rgba(14, 14, 19, 0.85) 0%, rgba(8, 8, 11, 0.95) 100%);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  box-shadow: 
    0 25px 80px -15px rgba(0, 0, 0, 0.8),
    0 0 0 1px rgba(255, 255, 255, 0.05) inset;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
}

/* --------------------------------------------------------------------------
   5. Header Navigation & Brand
   -------------------------------------------------------------------------- */
.cinematic-header {
  height: 72px;
  padding: 0 2.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(10, 10, 14, 0.4);
  position: relative;
  z-index: 20;
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.brand-logo {
  height: 32px;
  width: auto;
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.6));
}

.confidential-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--text-muted);
  padding: 0.25rem 0.65rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 4px;
}

.header-meta {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.rec-indicator {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.rec-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--red-rec);
  box-shadow: 0 0 10px var(--red-rec);
  animation: blinkRec 1.8s infinite ease-in-out;
}

@keyframes blinkRec {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.3; transform: scale(0.85); }
}

.rec-text {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--text-secondary);
}

.timecode-display {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--gold-accent);
  background: rgba(229, 169, 59, 0.08);
  padding: 0.3rem 0.75rem;
  border-radius: 6px;
  border: 1px solid rgba(229, 169, 59, 0.2);
  letter-spacing: 0.08em;
}

/* --------------------------------------------------------------------------
   6. Slides Architecture & Transitions
   -------------------------------------------------------------------------- */
.slides-wrapper {
  position: relative;
  flex: 1;
  width: 100%;
  height: calc(100% - 144px);
  overflow: hidden;
}

.slide-section {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  padding: 2.2rem 3.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateX(40px) scale(0.98);
  transition: 
    opacity 0.65s var(--ease-cinematic), 
    transform 0.75s var(--ease-cinematic),
    visibility 0.65s;
  pointer-events: none;
  overflow-y: auto;
  scrollbar-width: none;
}

.slide-section::-webkit-scrollbar {
  display: none;
}

.slide-section.active {
  opacity: 1;
  visibility: visible;
  transform: translateX(0) scale(1);
  pointer-events: auto;
  z-index: 10;
}

.slide-section.prev-slide {
  transform: translateX(-40px) scale(0.98);
  opacity: 0;
}

.slide-content-container {
  max-width: 1300px;
  margin: 0 auto;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 1.35rem;
}

/* --------------------------------------------------------------------------
   7. Staggered Animations
   -------------------------------------------------------------------------- */
.stagger-item {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.65s var(--ease-cinematic), transform 0.65s var(--ease-cinematic);
}

.slide-section.active .stagger-item:nth-child(1) { transition-delay: 0.10s; opacity: 1; transform: translateY(0); }
.slide-section.active .stagger-item:nth-child(2) { transition-delay: 0.20s; opacity: 1; transform: translateY(0); }
.slide-section.active .stagger-item:nth-child(3) { transition-delay: 0.30s; opacity: 1; transform: translateY(0); }
.slide-section.active .stagger-item:nth-child(4) { transition-delay: 0.40s; opacity: 1; transform: translateY(0); }
.slide-section.active .stagger-item:nth-child(5) { transition-delay: 0.50s; opacity: 1; transform: translateY(0); }

/* --------------------------------------------------------------------------
   8. Typography & Shared Elements
   -------------------------------------------------------------------------- */
.slide-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  color: var(--gold-accent);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.eyebrow-num {
  color: var(--gold-light);
  font-weight: 700;
}

.eyebrow-sep {
  opacity: 0.4;
}

.slide-title {
  font-family: var(--font-heading);
  font-size: clamp(1.85rem, 2.7vw, 2.6rem);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.025em;
  color: var(--text-pure);
}

.title-gradient {
  background: linear-gradient(100deg, #ffffff 15%, var(--gold-light) 60%, var(--gold-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.slide-intro {
  font-size: 1.05rem;
  color: var(--text-secondary);
  font-weight: 400;
}

.slide-footer-note {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.9rem 1.4rem;
  background: rgba(255, 255, 255, 0.025);
  border-left: 3px solid var(--gold-accent);
  border-radius: 0 10px 10px 0;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.slide-footer-note .note-icon {
  color: var(--gold-accent);
  font-size: 1rem;
}

.slide-footer-note strong {
  color: var(--text-pure);
}

/* --------------------------------------------------------------------------
   9. Slide 1 Specific: Manifesto & Comparison Grid
   -------------------------------------------------------------------------- */
.manifesto-box {
  position: relative;
  background: linear-gradient(135deg, rgba(229, 169, 59, 0.05) 0%, rgba(20, 20, 28, 0.6) 100%);
  border: 1px solid rgba(229, 169, 59, 0.2);
  border-radius: 12px;
  padding: 1.25rem 1.75rem 1.25rem 3.2rem;
}

.quote-mark {
  position: absolute;
  top: -0.2rem;
  left: 1rem;
  font-family: var(--font-serif);
  font-size: 3.2rem;
  color: var(--gold-accent);
  opacity: 0.45;
  line-height: 1;
}

.manifesto-text {
  font-size: 1.05rem;
  font-style: italic;
  line-height: 1.6;
  color: var(--text-primary);
}

.manifesto-text strong {
  color: var(--gold-light);
  font-style: normal;
  font-weight: 600;
}

.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.comparison-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 1.4rem 1.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  position: relative;
  transition: all var(--transition-normal);
}

.card-legacy {
  background: rgba(18, 18, 22, 0.45);
  border-color: rgba(255, 255, 255, 0.05);
}

.card-modern {
  background: linear-gradient(160deg, rgba(22, 24, 34, 0.85) 0%, rgba(14, 16, 24, 0.95) 100%);
  border-color: rgba(56, 189, 248, 0.25);
  box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
}

.card-status-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  padding: 0.3rem 0.65rem;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  width: fit-content;
}

.legacy-badge {
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.04);
}

.modern-badge {
  color: var(--cyan-accent);
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.card-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-pure);
}

.card-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

.card-footer-tag {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  padding-top: 0.5rem;
  border-top: 1px dashed rgba(255, 255, 255, 0.08);
}

.modern-tag {
  color: var(--cyan-accent);
  border-top-color: rgba(56, 189, 248, 0.2);
}

/* --------------------------------------------------------------------------
   10. Slide 2 Specific: 3 Layers Architecture Grid
   -------------------------------------------------------------------------- */
.layers-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.35rem;
}

.layer-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 1.6rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  position: relative;
  transition: all var(--transition-normal);
  backdrop-filter: blur(16px);
}

.layer-card:hover {
  transform: translateY(-6px);
  background: var(--bg-glass-hover);
  border-color: rgba(255, 255, 255, 0.25);
  box-shadow: 0 16px 40px -10px rgba(0, 0, 0, 0.7);
}

.layer-card.featured-layer {
  border-color: var(--border-gold);
  background: linear-gradient(160deg, rgba(28, 26, 22, 0.8) 0%, rgba(16, 16, 22, 0.9) 100%);
  box-shadow: 0 8px 30px -8px var(--gold-glow);
}

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

.layer-code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--gold-accent);
}

.layer-indicator {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-muted);
}

.layer-indicator.active-ind {
  background: var(--gold-accent);
  box-shadow: 0 0 8px var(--gold-accent);
}

.layer-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-pure);
  line-height: 1.3;
}

.layer-subtitle {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--cyan-accent);
  letter-spacing: 0.05em;
  margin-top: -0.3rem;
}

.layer-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.layer-specs {
  margin-top: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--border-subtle);
}

.layer-specs span {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.04);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}

.architecture-footer {
  border-left-color: var(--cyan-accent);
}
.architecture-footer .note-icon {
  color: var(--cyan-accent);
}

/* --------------------------------------------------------------------------
   11. Slide 3 Specific: Timeline Roadmap & CTA Box
   -------------------------------------------------------------------------- */
.roadmap-timeline {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  align-items: center;
  gap: 0.75rem;
}

.timeline-step {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.step-badge {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 0.25rem;
}

.step-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--gold-accent);
}

.step-duration {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
}

.step-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 1.35rem 1.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  transition: all var(--transition-normal);
  min-height: 155px;
}

.step-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-gold);
  background: var(--bg-glass-hover);
}

.step-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-pure);
}

.step-desc {
  font-size: 0.83rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.step-tag {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--cyan-accent);
}

.timeline-connector {
  position: relative;
  width: 28px;
  height: 2px;
  background: rgba(255, 255, 255, 0.12);
  margin-top: 1.8rem;
}

.connector-pulse {
  position: absolute;
  top: -3px;
  left: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gold-accent);
  box-shadow: 0 0 8px var(--gold-accent);
  animation: pulseMove 3s infinite ease-in-out;
}

@keyframes pulseMove {
  0% { left: 0%; opacity: 0.3; }
  50% { opacity: 1; transform: scale(1.3); }
  100% { left: 100%; opacity: 0.3; }
}

.bottom-split-row {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 1.5rem;
  align-items: stretch;
}

.cost-logic-box {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.5rem;
}

.logic-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logic-icon {
  color: var(--gold-accent);
}

.logic-header h4 {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-pure);
}

.cost-logic-box p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.cta-callout-box {
  position: relative;
  background: linear-gradient(135deg, rgba(229, 169, 59, 0.12) 0%, rgba(20, 18, 26, 0.85) 100%);
  border: 1px solid rgba(229, 169, 59, 0.35);
  border-radius: 14px;
  padding: 1.25rem 1.75rem;
  overflow: hidden;
  box-shadow: 0 10px 30px -10px var(--gold-glow);
}

.cta-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.5rem;
}

.coffee-icon {
  font-size: 1.1rem;
}

.cta-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--gold-light);
}

.cta-quote {
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--text-primary);
  font-style: italic;
}

/* --------------------------------------------------------------------------
   12. Footer Controls & Progress
   -------------------------------------------------------------------------- */
.cinematic-footer {
  height: 72px;
  padding: 0 2.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-subtle);
  background: rgba(10, 10, 14, 0.4);
  position: relative;
  z-index: 20;
}

.nav-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  height: 42px;
  padding: 0 1.25rem;
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.nav-btn svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-fast);
}

.nav-btn:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.3);
  color: #ffffff;
  transform: translateY(-1px);
}

.nav-btn.prev-btn:hover:not(:disabled) svg {
  transform: translateX(-3px);
}

.nav-btn.next-btn:hover:not(:disabled) svg {
  transform: translateX(3px);
}

.nav-btn:disabled {
  opacity: 0.25;
  cursor: not-allowed;
  pointer-events: none;
}

.timeline-controller {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.step-indicators {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.step-node {
  background: none;
  border: none;
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.3rem 0.5rem;
  border-radius: 4px;
  transition: all var(--transition-fast);
}

.node-num {
  font-weight: 700;
}

.node-title {
  letter-spacing: 0.08em;
}

.step-node:hover {
  color: var(--text-secondary);
}

.step-node.active {
  color: var(--gold-accent);
  background: rgba(229, 169, 59, 0.08);
}

.step-line {
  width: 36px;
  height: 2px;
  background: rgba(255, 255, 255, 0.08);
  position: relative;
  overflow: hidden;
}

.step-line .line-fill {
  width: 0%;
  height: 100%;
  background: var(--gold-accent);
  transition: width 0.4s ease;
}

.progress-bar-container {
  width: 220px;
  height: 2px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 2px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  width: 33.333%;
  background: linear-gradient(90deg, var(--gold-accent), var(--cyan-accent));
  transition: width 0.55s var(--ease-cinematic);
}

/* --------------------------------------------------------------------------
   13. Keyboard Shortcuts Overlay Hint
   -------------------------------------------------------------------------- */
.keyboard-hints {
  position: absolute;
  bottom: 84px;
  right: 2.5rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  opacity: 0.4;
  transition: opacity var(--transition-fast);
  pointer-events: none;
}

.keyboard-hints:hover {
  opacity: 0.9;
}

.key-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 4px;
  padding: 0.15rem 0.4rem;
}

.hints-text {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  margin-left: 0.2rem;
}

/* --------------------------------------------------------------------------
   14. Interactive Spotlight & Mouse Glow Effect
   -------------------------------------------------------------------------- */
.interactive-glow {
  position: relative;
  overflow: hidden;
}

.interactive-glow::before {
  content: '';
  position: absolute;
  top: var(--mouse-y, -1000px);
  left: var(--mouse-x, -1000px);
  width: 300px;
  height: 300px;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(255, 255, 255, 0.08) 0%, transparent 60%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.interactive-glow:hover::before {
  opacity: 1;
}

/* --------------------------------------------------------------------------
   15. Responsive Adaptations (Laptops, Tablets, Mobiles)
   -------------------------------------------------------------------------- */
@media (max-width: 1200px) {
  .slide-title {
    font-size: clamp(1.6rem, 2.4vw, 2.1rem);
  }
  .slide-section {
    padding: 1.8rem 2.2rem;
  }
  .slide-content-container {
    gap: 1.15rem;
  }
}

@media (max-width: 992px) {
  .cinematic-frame {
    aspect-ratio: auto;
    height: 100%;
    max-height: none;
    border-radius: 0;
    border-left: none;
    border-right: none;
  }
  .presentation-viewport {
    padding: 0;
  }
  .slide-section {
    justify-content: flex-start;
    padding: 1.75rem 2rem;
  }
  .layers-grid {
    grid-template-columns: 1fr;
    gap: 1.15rem;
  }
  .roadmap-timeline {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
  .timeline-connector {
    display: none;
  }
  .bottom-split-row {
    grid-template-columns: 1fr;
    gap: 1.15rem;
  }
  .comparison-grid {
    grid-template-columns: 1fr;
    gap: 1.15rem;
  }
  .keyboard-hints {
    display: none;
  }
}

@media (max-width: 768px) {
  .cinematic-header {
    height: 60px;
    padding: 0 1.25rem;
  }
  .cinematic-footer {
    height: 64px;
    padding: 0 1.25rem;
  }
  .slides-wrapper {
    height: calc(100% - 124px);
  }
  .slide-section {
    padding: 1.35rem 1.25rem 2rem;
  }
  .brand-logo {
    height: 24px;
  }
  .confidential-badge {
    display: none;
  }
  .header-meta {
    gap: 0.85rem;
  }
  .rec-text {
    font-size: 0.68rem;
  }
  .timecode-display {
    font-size: 0.72rem;
    padding: 0.2rem 0.5rem;
  }
  .slide-title {
    font-size: clamp(1.4rem, 5.5vw, 1.85rem);
    line-height: 1.22;
  }
  .manifesto-box {
    padding: 1rem 1.25rem 1rem 2.6rem;
  }
  .quote-mark {
    font-size: 2.5rem;
    left: 0.75rem;
    top: -0.1rem;
  }
  .manifesto-text {
    font-size: 0.95rem;
  }
  .step-node .node-title {
    display: none;
  }
  .step-indicators {
    gap: 0.4rem;
  }
  .step-line {
    width: 18px;
  }
  .progress-bar-container {
    width: 130px;
  }
}

@media (max-width: 480px) {
  .cinematic-header {
    height: 54px;
    padding: 0 0.9rem;
  }
  .cinematic-footer {
    height: 60px;
    padding: 0 0.9rem;
  }
  .slides-wrapper {
    height: calc(100% - 114px);
  }
  .slide-section {
    padding: 1rem 0.9rem 1.75rem;
  }
  .slide-content-container {
    gap: 0.95rem;
  }
  .brand-logo {
    height: 20px;
  }
  .rec-indicator {
    display: none;
  }
  .timecode-display {
    font-size: 0.68rem;
    padding: 0.2rem 0.45rem;
    letter-spacing: 0.04em;
  }
  .slide-eyebrow {
    font-size: 0.72rem;
    letter-spacing: 0.14em;
  }
  .slide-title {
    font-size: 1.32rem;
    line-height: 1.24;
    word-break: break-word;
  }
  .manifesto-box {
    padding: 0.85rem 1rem 0.85rem 2.2rem;
    border-radius: 10px;
  }
  .quote-mark {
    font-size: 2.2rem;
    left: 0.55rem;
  }
  .manifesto-text {
    font-size: 0.88rem;
    line-height: 1.5;
  }
  .comparison-card {
    padding: 1.1rem 1.15rem;
    border-radius: 12px;
  }
  .card-title {
    font-size: 1.05rem;
  }
  .card-desc {
    font-size: 0.84rem;
  }
  .slide-footer-note {
    padding: 0.75rem 1rem;
    font-size: 0.82rem;
    line-height: 1.45;
  }
  .slide-intro {
    font-size: 0.92rem;
  }
  .layer-card {
    padding: 1.25rem 1.15rem;
    border-radius: 12px;
  }
  .layer-title {
    font-size: 1.1rem;
  }
  .layer-desc {
    font-size: 0.84rem;
  }
  .step-card {
    min-height: auto;
    padding: 1.15rem;
  }
  .step-title {
    font-size: 0.98rem;
  }
  .step-desc {
    font-size: 0.82rem;
  }
  .cost-logic-box {
    padding: 1.1rem 1.15rem;
  }
  .cost-logic-box p {
    font-size: 0.82rem;
  }
  .cta-callout-box {
    padding: 1.1rem 1.25rem;
  }
  .cta-label {
    font-size: 0.72rem;
  }
  .cta-quote {
    font-size: 0.86rem;
    line-height: 1.48;
  }
  .nav-btn {
    height: 38px;
    padding: 0 0.75rem;
    font-size: 0.7rem;
    gap: 0.4rem;
  }
  .nav-btn svg {
    width: 14px;
    height: 14px;
  }
  .step-node {
    padding: 0.2rem 0.35rem;
    font-size: 0.7rem;
  }
  .step-line {
    width: 12px;
  }
  .progress-bar-container {
    width: 90px;
  }
}

@media (max-width: 360px) {
  .slide-title {
    font-size: 1.22rem;
  }
  .slide-section {
    padding: 0.85rem 0.75rem 1.5rem;
  }
  .cinematic-header, .cinematic-footer {
    padding: 0 0.75rem;
  }
  .nav-btn .btn-text {
    display: none;
  }
  .nav-btn {
    padding: 0 0.65rem;
  }
  .progress-bar-container {
    width: 70px;
  }
}