/* ==========================================================================
   SOVI.AI TO B HIGHER EDUCATION PITCH - TECH AESTHETIC STYLESHEET
   ========================================================================== */

:root {
  /* Color Palette - Deep Tech Cosmic Dark */
  --bg-primary: #07090E;
  --bg-secondary: #0D121F;
  --bg-card: rgba(16, 22, 36, 0.72);
  --bg-card-hover: rgba(22, 30, 48, 0.88);
  --bg-card-solid: #111726;
  --bg-surface: rgba(255, 255, 255, 0.03);
  --bg-glass: rgba(15, 23, 42, 0.65);
  
  /* Brand Accent Gradients */
  --brand-purple: #8B5CF6;
  --brand-indigo: #6366F1;
  --brand-cyan: #06B6D4;
  --brand-blue: #3B82F6;
  --brand-emerald: #10B981;
  --brand-amber: #F59E0B;
  --brand-rose: #F43F5E;
  
  --gradient-primary: linear-gradient(135deg, #8B5CF6 0%, #6366F1 50%, #06B6D4 100%);
  --gradient-purple: linear-gradient(135deg, #A855F7 0%, #6366F1 100%);
  --gradient-cyan: linear-gradient(135deg, #06B6D4 0%, #3B82F6 100%);
  --gradient-emerald: linear-gradient(135deg, #10B981 0%, #059669 100%);
  --gradient-dark-card: linear-gradient(180deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.01) 100%);
  --gradient-glow: radial-gradient(circle at center, rgba(139, 92, 246, 0.15) 0%, rgba(6, 182, 212, 0.05) 45%, transparent 70%);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Consolas, Menlo, monospace;

  /* Text Colors */
  --text-pure: #FFFFFF;
  --text-primary: #F1F5F9;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --text-accent: #38BDF8;
  
  /* Borders & Shadows */
  --border-light: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(139, 92, 246, 0.35);
  --border-active: rgba(56, 189, 248, 0.5);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5), 0 0 1px 1px rgba(255, 255, 255, 0.05);
  --shadow-glow: 0 0 40px -10px rgba(139, 92, 246, 0.3);
  --shadow-cyan-glow: 0 0 30px -8px rgba(6, 182, 212, 0.35);

  /* Layout */
  --header-height: 68px;
  --deck-controls-height: 64px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
}

/* Reset & Base Setup */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  overflow-x: hidden;
  min-height: 100vh;
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(at 10% 20%, rgba(99, 102, 241, 0.08) 0px, transparent 50%),
    radial-gradient(at 90% 80%, rgba(6, 182, 212, 0.06) 0px, transparent 50%),
    radial-gradient(at 50% 50%, rgba(139, 92, 246, 0.04) 0px, transparent 60%);
  background-attachment: fixed;
}

/* Subtle Animated Grid Background */
body::before {
  content: '';
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  background-size: 40px 40px;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  pointer-events: none;
  z-index: 0;
}

/* Global Typography Helpers */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-pure);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

p {
  color: var(--text-secondary);
}

a {
  color: var(--brand-cyan);
  text-decoration: none;
  transition: all 0.2s ease;
}

a:hover {
  color: #7dd3fc;
  text-decoration: underline;
}

.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.gradient-text-cyan {
  background: var(--gradient-cyan);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.gradient-text-purple {
  background: var(--gradient-purple);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

/* Top Global Navigation Bar */
.top-navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background: rgba(7, 9, 14, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  z-index: 1000;
  transition: all 0.3s ease;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
}

.nav-logo {
  height: 34px;
  width: auto;
  object-fit: contain;
  filter: drop-shadow(0 2px 8px rgba(139, 92, 246, 0.4));
}

.brand-text-name {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: #FFFFFF;
}

.nav-tag-badge {
  background: rgba(139, 92, 246, 0.15);
  border: 1px solid rgba(139, 92, 246, 0.35);
  color: #C4B5FD;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 9999px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.mode-toggle-group {
  display: flex;
  background: rgba(255, 255, 255, 0.05);
  padding: 3px;
  border-radius: 10px;
  border: 1px solid var(--border-light);
}

.mode-btn {
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 7px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
}

.mode-btn.active {
  background: var(--brand-indigo);
  color: var(--text-pure);
  box-shadow: 0 2px 10px rgba(99, 102, 241, 0.4);
}

.nav-cta-btn {
  background: linear-gradient(135deg, #8B5CF6, #6366F1);
  color: white;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}

.nav-cta-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(139, 92, 246, 0.45);
}

/* ==========================================================================
   PRESENTATION DECK VIEW (SLIDE BY SLIDE)
   ========================================================================== */

body.mode-deck {
  overflow: hidden;
}

body.mode-deck .top-navbar {
  background: rgba(7, 9, 14, 0.65);
  border-bottom-color: rgba(255, 255, 255, 0.04);
}

.deck-container {
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: 100vw;
  height: calc(100vh - var(--header-height) - var(--deck-controls-height));
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem 3rem;
  z-index: 10;
}

.slide {
  position: absolute;
  width: min(1440px, 94vw);
  height: auto;
  max-height: calc(100vh - var(--header-height) - var(--deck-controls-height) - 1.5rem);
  opacity: 0;
  visibility: hidden;
  transform: translateX(40px) scale(0.98);
  transition: all 0.45s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  justify-content: center;
  pointer-events: none;
  overflow: hidden;
}

.slide.active {
  opacity: 1;
  visibility: visible;
  transform: translateX(0) scale(1);
  pointer-events: auto;
  z-index: 5;
}

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

/* Slide Cards & Surfaces */
.glass-panel {
  background: var(--bg-card);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  width: 100%;
  min-height: 575px;
  box-sizing: border-box;
}

.glass-panel:hover {
  border-color: rgba(255, 255, 255, 0.15);
}

.glass-panel::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
}

/* Bottom Controls Bar */
.deck-controls {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  height: var(--deck-controls-height);
  background: rgba(7, 9, 14, 0.92);
  backdrop-filter: blur(20px);
  border-top: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2.5rem;
  z-index: 1000;
}

.deck-progress-bar-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: rgba(255, 255, 255, 0.06);
}

.deck-progress-bar {
  height: 100%;
  width: 0%;
  background: var(--gradient-primary);
  transition: width 0.35s ease;
  box-shadow: 0 0 10px var(--brand-purple);
}

.deck-info {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.slide-number-indicator {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 600;
}

.slide-number-indicator span.current {
  color: var(--text-pure);
  font-size: 1.15rem;
  font-weight: 700;
}

.slide-topic-badge {
  font-size: 0.82rem;
  color: var(--brand-cyan);
  background: rgba(6, 182, 212, 0.1);
  padding: 4px 12px;
  border-radius: 6px;
  border: 1px solid rgba(6, 182, 212, 0.25);
  font-weight: 500;
}

.deck-nav-buttons {
  display: flex;
  align-items: center;
  gap: 12px;
}

.ctrl-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-light);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.ctrl-btn:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.25);
  color: var(--text-pure);
  transform: translateY(-1px);
}

.ctrl-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.ctrl-btn.drawer-btn {
  width: auto;
  padding: 0 14px;
  gap: 6px;
  font-size: 0.82rem;
  font-weight: 600;
}

/* Slide Thumbnail Drawer */
.slide-drawer {
  position: fixed;
  bottom: var(--deck-controls-height);
  left: 0;
  width: 100%;
  background: rgba(11, 15, 25, 0.96);
  backdrop-filter: blur(28px);
  border-top: 1px solid var(--border-light);
  padding: 1.5rem 2rem;
  display: flex;
  gap: 1.25rem;
  overflow-x: auto;
  z-index: 999;
  transform: translateY(110%);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 -20px 40px rgba(0, 0, 0, 0.6);
}

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

.thumbnail-card {
  flex: 0 0 180px;
  height: 110px;
  background: var(--bg-card-solid);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 10px;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.thumbnail-card:hover {
  border-color: var(--brand-purple);
  transform: translateY(-3px);
}

.thumbnail-card.active {
  border: 2px solid var(--brand-purple);
  box-shadow: 0 0 15px rgba(139, 92, 246, 0.4);
  background: rgba(139, 92, 246, 0.15);
}

.thumb-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--brand-cyan);
  font-weight: 700;
}

.thumb-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.3;
}

/* ==========================================================================
   EXECUTIVE DOCUMENT / WHITEPAPER HUB VIEW (CONTINUOUS SCROLL)
   ========================================================================== */

body.mode-doc {
  overflow-y: auto;
}

body.mode-doc .deck-container {
  position: relative;
  top: var(--header-height);
  height: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 3rem 1.5rem 8rem 1.5rem;
  z-index: 1;
}

body.mode-doc .deck-controls,
body.mode-doc .slide-drawer {
  display: none !important;
}

body.mode-doc .slide {
  position: relative;
  width: min(1200px, 92vw);
  height: auto;
  max-height: none;
  opacity: 1 !important;
  visibility: visible !important;
  transform: none !important;
  pointer-events: auto;
  margin-bottom: 5rem;
  padding-bottom: 4rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

body.mode-doc .slide:last-child {
  border-bottom: none;
}

/* ==========================================================================
   SLIDE CONTENT ARCHITECTURES & COMPONENT MODULES
   ========================================================================== */

.slide-header {
  margin-bottom: 1.5rem;
}

.slide-category-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--brand-cyan);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
}

.slide-title {
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--text-pure);
  line-height: 1.25;
}

.slide-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-top: 0.35rem;
  max-width: 900px;
}

/* Grid Layouts */
.grid-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
}

.grid-3col {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.grid-4col {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

/* ----------------------------------------------------
   SLIDE 1: COVER / HERO SECTION
   ---------------------------------------------------- */
.hero-content-left {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.hero-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(139, 92, 246, 0.12);
  border: 1px solid rgba(139, 92, 246, 0.3);
  padding: 6px 14px;
  border-radius: 9999px;
  width: fit-content;
}

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

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

.hero-title {
  font-size: 3rem;
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.03em;
}

.hero-lead {
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.hero-tags-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.tech-tag {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-light);
  color: var(--text-primary);
  font-size: 0.8rem;
  padding: 6px 10px;
  border-radius: 6px;
  font-weight: 500;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.hero-metric-cards-row {
  margin-top: 0.85rem;
  padding-top: 0.85rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.hero-metric-mini-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  padding: 10px 12px;
  text-align: left;
  transition: all 0.2s ease;
}

.hero-metric-mini-card:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(139, 92, 246, 0.35);
  transform: translateY(-2px);
}

.mini-card-num {
  font-size: 1.35rem;
  font-weight: 800;
  font-family: var(--font-mono);
  line-height: 1.2;
}

.mini-card-label {
  font-size: 0.72rem;
  color: var(--text-secondary);
  margin-top: 3px;
  line-height: 1.3;
}

.hero-showcase-right {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-img-wrap {
  position: relative;
  width: 100%;
  max-width: 660px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-img-wrap img {
  width: 100%;
  height: auto;
  display: block;
  filter: drop-shadow(0 20px 45px rgba(0, 0, 0, 0.7)) drop-shadow(0 0 40px rgba(139, 92, 246, 0.25));
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), filter 0.5s ease;
}

.hero-img-wrap:hover img {
  transform: scale(1.025) translateY(-3px);
  filter: drop-shadow(0 25px 55px rgba(0, 0, 0, 0.8)) drop-shadow(0 0 50px rgba(139, 92, 246, 0.35));
}

.hero-floating-badge {
  position: absolute;
  bottom: 18px;
  left: 18px;
  background: rgba(13, 18, 31, 0.92);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(139, 92, 246, 0.4);
  border-radius: 12px;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
}

.badge-metric-num {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--brand-cyan);
  font-family: var(--font-mono);
}

.badge-metric-desc {
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.3;
}

/* ----------------------------------------------------
   SLIDE 2: COMPLETE LEARNING LOOP & PAIN POINTS
   ---------------------------------------------------- */
.loop-flow-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  margin: 1.25rem 0 1.75rem 0;
  gap: 12px;
}

.loop-step-card {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.15rem 0.9rem;
  text-align: center;
  position: relative;
  transition: all 0.3s ease;
}

.loop-step-card:hover {
  border-color: var(--brand-purple);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.step-num-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--brand-indigo);
  color: white;
  font-size: 0.72rem;
  font-weight: 800;
  font-family: var(--font-mono);
  padding: 2px 10px;
  border-radius: 9999px;
  border: 2px solid var(--bg-primary);
}

.step-icon-box {
  width: 44px;
  height: 44px;
  margin: 0.4rem auto 0.65rem auto;
  border-radius: 12px;
  background: rgba(139, 92, 246, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: #C4B5FD;
}

.step-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-pure);
  margin-bottom: 4px;
}

.step-pain {
  font-size: 0.76rem;
  color: #FDA4AF;
  margin-bottom: 8px;
  font-weight: 500;
}

.step-sovi-feature {
  font-size: 0.78rem;
  color: var(--brand-cyan);
  background: rgba(6, 182, 212, 0.1);
  padding: 4px 8px;
  border-radius: 6px;
  font-weight: 600;
}

.flow-arrow-icon {
  color: var(--text-muted);
  font-size: 1.2rem;
  flex-shrink: 0;
}

.pain-solution-matrix {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.matrix-box {
  padding: 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
}

.matrix-box.pain {
  background: rgba(244, 63, 94, 0.04);
  border-color: rgba(244, 63, 94, 0.2);
}

.matrix-box.solution {
  background: rgba(16, 185, 129, 0.04);
  border-color: rgba(16, 185, 129, 0.2);
}

.matrix-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 0.75rem;
}

.matrix-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.matrix-list li {
  font-size: 0.85rem;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.45;
}

/* ----------------------------------------------------
   SLIDE 3: CLASSROOM · LIVE RECORDING & AI NOTES
   ---------------------------------------------------- */
.slide-classroom-layout {
  display: grid;
  grid-template-columns: minmax(400px, 44fr) minmax(480px, 56fr);
  gap: 2rem;
  align-items: stretch;
  margin-top: 0.85rem;
  height: 375px;
  min-height: 0;
}

.classroom-steps-col {
  display: grid;
  grid-template-rows: repeat(3, 1fr);
  gap: 0.75rem;
  height: 100%;
}

.step-vcard {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 0.9rem 1.35rem;
  position: relative;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.2rem;
  box-sizing: border-box;
}

.step-vcard:hover {
  background: rgba(255, 255, 255, 0.055);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateX(4px);
}

.step-vcard.active-step {
  border-color: rgba(139, 92, 246, 0.45);
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.12) 0%, rgba(6, 182, 212, 0.05) 100%);
  box-shadow: 0 4px 20px rgba(139, 92, 246, 0.12);
}

.step-vcard.active-step:hover {
  border-color: rgba(139, 92, 246, 0.65);
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.16) 0%, rgba(6, 182, 212, 0.08) 100%);
  box-shadow: 0 6px 26px rgba(139, 92, 246, 0.2);
}

.step-vcard-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.tri-badge {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--brand-purple);
  margin-bottom: 2px;
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
}

.tri-badge.highlight {
  color: var(--brand-cyan);
}

.tri-title {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text-pure);
  margin-bottom: 1px;
}

.tri-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

.classroom-mockup-col {
  display: flex;
  align-items: stretch;
  justify-content: center;
  width: 100%;
  height: 100%;
  min-height: 0;
}

.classroom-mockup-container {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.55), 0 0 30px rgba(139, 92, 246, 0.08);
  background: #0D111C;
  width: 100%;
  height: 100%;
  min-height: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1rem;
  box-sizing: border-box;
  transition: all 0.3s ease;
}

.classroom-mockup-container:hover {
  border-color: rgba(255, 255, 255, 0.25);
  box-shadow: 0 22px 50px rgba(0, 0, 0, 0.7), 0 0 40px rgba(139, 92, 246, 0.15);
}

.classroom-mockup-container img {
  width: 100%;
  height: 100%;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  display: block;
  border-radius: var(--radius-sm);
}

/* ----------------------------------------------------
   SLIDE 4: REVIEW · 1 PPT TO 5 STUDY ASSETS
   ---------------------------------------------------- */
.transformer-container {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 1.5rem;
  align-items: stretch;
  width: 100%;
  box-sizing: border-box;
}

.input-ppt-box {
  background: rgba(255, 255, 255, 0.03);
  border: 2px dashed rgba(139, 92, 246, 0.4);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 12px;
  box-sizing: border-box;
}

.upload-icon-pulse {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: rgba(139, 92, 246, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: #C4B5FD;
}

.transformer-output-col {
  min-width: 0;
  width: 100%;
  display: flex;
  flex-direction: column;
  box-sizing: border-box;
}

.five-assets-tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 0.85rem;
  overflow-x: auto;
  scrollbar-width: none;
  width: 100%;
  box-sizing: border-box;
}

.five-assets-tabs::-webkit-scrollbar {
  display: none;
}

.asset-tab-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-light);
  color: var(--text-secondary);
  padding: 7px 13px;
  border-radius: 8px;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 5px;
  flex-shrink: 0;
}

.asset-tab-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-pure);
}

.asset-tab-btn.active {
  background: var(--brand-purple);
  border-color: var(--brand-purple);
  color: white;
  box-shadow: 0 4px 12px rgba(139, 92, 246, 0.35);
}

.asset-preview-stage {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  min-height: 280px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  width: 100%;
  box-sizing: border-box;
}

.asset-tab-content {
  display: none;
  animation: fadeIn 0.3s ease;
  width: 100%;
}

.asset-tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.cheatsheet-showcase-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 1.25rem;
  align-items: center;
  width: 100%;
  box-sizing: border-box;
}

/* ----------------------------------------------------
   SLIDE 5: ASSIGNMENT HELPER, VIDEO & EXAM PREP
   ---------------------------------------------------- */
.tri-card-showcase {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.showcase-feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
}

.showcase-feature-card:hover {
  border-color: rgba(139, 92, 246, 0.4);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.feature-card-img-wrap {
  width: 100%;
  height: 180px;
  background: #090C14;
  overflow: hidden;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px;
  box-sizing: border-box;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.feature-card-img-wrap img {
  width: 100%;
  height: 100%;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: 6px;
  display: block;
  transition: transform 0.4s ease;
}

.showcase-feature-card:hover .feature-card-img-wrap img {
  transform: scale(1.03);
}

.feature-card-content {
  padding: 1rem 1.15rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.feature-badge-sub {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--brand-cyan);
  margin-bottom: 4px;
}

.feature-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-pure);
  margin-bottom: 6px;
}

.feature-card-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.45;
  margin-bottom: 10px;
}

.feature-pills {
  margin-top: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.feature-pill-item {
  font-size: 0.72rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 2px 8px;
  border-radius: 4px;
  color: var(--text-secondary);
}

/* ----------------------------------------------------
   SLIDE 6: MOBILE + WEB MULTI-DEVICE ECOSYSTEM
   ---------------------------------------------------- */
.mobile-flow-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 0.9rem 1.25rem;
  margin-bottom: 1.25rem;
}

.mob-step {
  display: flex;
  align-items: center;
  gap: 8px;
}

.mob-step-circle {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--brand-indigo);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 800;
}

.mob-step-text {
  display: flex;
  flex-direction: column;
}

.mob-step-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-pure);
}

.mob-step-desc {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.mobile-web-compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.platform-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.platform-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.platform-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-pure);
}

.platform-role-tag {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 9999px;
  background: rgba(139, 92, 246, 0.15);
  color: #C4B5FD;
}

/* ----------------------------------------------------
   SLIDE 7: DATA METRICS & ROI CALCULATOR
   ---------------------------------------------------- */
.metrics-big-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.big-metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.big-metric-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0; height: 3px;
  background: var(--gradient-primary);
}

.metric-number-huge {
  font-size: 2.6rem;
  font-weight: 900;
  font-family: var(--font-mono);
  line-height: 1.1;
  margin-bottom: 2px;
}

.metric-label-sub {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-pure);
}

.metric-detail-note {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Interactive ROI Calculator Card */
.roi-calculator-box {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(6, 182, 212, 0.06) 100%);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.75rem;
  display: grid;
  grid-template-columns: 1.1fr 1.3fr;
  gap: 1.75rem;
  align-items: center;
}

.calc-slider-wrap {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

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

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

.calc-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--brand-cyan);
  cursor: pointer;
  box-shadow: 0 0 12px var(--brand-cyan);
}

.calc-results-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.calc-res-item {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  padding: 10px;
  text-align: center;
}

.calc-res-num {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--brand-emerald);
  font-family: var(--font-mono);
}

.calc-res-label {
  font-size: 0.72rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

/* ----------------------------------------------------
   SLIDE 8: TWO COLLABORATION MODELS & COMPARISON
   ---------------------------------------------------- */
.coop-models-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-bottom: 0.75rem;
}

.coop-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 0.95rem 1.15rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.3s ease;
}

.coop-card:hover {
  transform: translateY(-2px);
  border-color: var(--brand-purple);
  box-shadow: var(--shadow-glow);
}

.coop-card.featured {
  border-color: rgba(6, 182, 212, 0.4);
  background: linear-gradient(180deg, rgba(6, 182, 212, 0.08) 0%, rgba(16, 22, 36, 0.85) 100%);
}

.model-header-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(139, 92, 246, 0.15);
  color: #C4B5FD;
  width: fit-content;
  margin-bottom: 0.35rem;
}

.featured .model-header-badge {
  background: rgba(6, 182, 212, 0.15);
  color: var(--brand-cyan);
}

.model-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-pure);
  margin-bottom: 0.2rem;
}

.model-target {
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  line-height: 1.35;
}

.model-flow-box {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: space-around;
  font-size: 0.75rem;
  font-weight: 600;
}

.model-flow-box span.flow-item {
  color: var(--text-primary);
}

.model-flow-box span.flow-arrow {
  color: var(--brand-cyan);
}

.model-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.model-features-list li {
  font-size: 0.76rem;
  color: var(--text-secondary);
  display: flex;
  align-items: flex-start;
  gap: 6px;
  line-height: 1.35;
}

.model-features-list li strong {
  color: var(--text-pure);
}

.check-icon {
  color: var(--brand-emerald);
  flex-shrink: 0;
  margin-top: 2px;
}

/* Comparison Table */
.comp-table-container {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.comp-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.74rem;
}

.comp-table th, .comp-table td {
  padding: 5px 10px;
  text-align: left;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.comp-table th {
  background: rgba(255, 255, 255, 0.04);
  font-weight: 700;
  color: var(--text-pure);
}

.comp-table td.highlight {
  background: rgba(139, 92, 246, 0.08);
  color: #C4B5FD;
  font-weight: 600;
}

/* ----------------------------------------------------
   SLIDE 9: DEPLOYMENT SOP & COMPLIANCE ARCHITECTURE
   ---------------------------------------------------- */
.sop-timeline-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.sop-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.15rem;
  position: relative;
}

.sop-day-pill {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--brand-cyan);
  margin-bottom: 4px;
}

.sop-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-pure);
  margin-bottom: 4px;
}

.sop-desc {
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.35;
}

.compliance-tri-boxes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.compliance-box {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.comp-icon {
  font-size: 1.3rem;
  color: var(--brand-emerald);
}

.comp-title {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-pure);
  margin-bottom: 2px;
}

.comp-desc {
  font-size: 0.76rem;
  color: var(--text-secondary);
  line-height: 1.35;
}

/* ----------------------------------------------------
   SLIDE 10: CONTACT & NEXT STEPS
   ---------------------------------------------------- */
.contact-hero-card {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.15) 0%, rgba(6, 182, 212, 0.1) 100%);
  border: 1px solid rgba(139, 92, 246, 0.35);
  border-radius: var(--radius-xl);
  padding: 2.25rem;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2.25rem;
  align-items: center;
}

.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  margin-top: 1.25rem;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.contact-icon-circle {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand-cyan);
}

.qr-demo-card {
  background: var(--bg-card-solid);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.qr-box-simulated {
  width: 140px;
  height: 140px;
  background: white;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
}

.qr-box-simulated img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* Lightbox Modal for Screenshots */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(20px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s ease;
}

.modal-overlay.open {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.9);
  border: 1px solid var(--border-light);
}

.modal-content img {
  max-width: 100%;
  max-height: 85vh;
  display: block;
}

.modal-close-btn {
  position: absolute;
  top: 15px;
  right: 15px;
  background: rgba(0, 0, 0, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: white;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

/* Keyboard hint tooltip */
.kb-hints {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.72rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.kb-key {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 1px 6px;
  border-radius: 4px;
  color: var(--text-secondary);
}

/* ==========================================================================
   PRINT & EXPORT STYLES
   ========================================================================== */
@media print {
  body {
    background: #0B0E17 !important;
    color: #FFFFFF !important;
  }
  .top-navbar, .deck-controls, .slide-drawer, .modal-overlay {
    display: none !important;
  }
  .slide {
    page-break-after: always;
    opacity: 1 !important;
    visibility: visible !important;
    transform: none !important;
    height: auto !important;
    margin-bottom: 2rem;
  }
}

/* Responsive adjustments */
@media (max-width: 1024px) {
  .hero-title { font-size: 2.2rem; }
  .grid-2col, .grid-3col, .grid-4col, .sop-timeline-grid, .coop-models-grid, .metrics-big-row, .pain-solution-matrix, .transformer-container, .slide-classroom-layout, .live-demo-split, .roi-calculator-box {
    grid-template-columns: 1fr !important;
  }
  .slide {
    height: auto;
    max-height: none;
    overflow-y: visible;
  }
  .deck-container {
    padding: 1rem;
  }
}