/* ======================================
       1. Design Tokens (CSS Variables)
       ====================================== */
    :root {
      /* Primary - Blue */
      --primary-900: #1E3A5F;
      --primary-700: #2563EB;
      --primary-500: #3B82F6;
      --primary-300: #93C5FD;
      --primary-200: #BFDBFE;
      --primary-100: #DBEAFE;
      --primary-50:  #EFF6FF;

      /* Accent - Amber */
      --accent-500: #F59E0B;
      --accent-300: #FCD34D;
      --accent-100: #FEF3C7;

      /* Text */
      --text-primary:   #1E293B;
      --text-secondary: #64748B;
      --text-light:     #FFFFFF;

      /* Background */
      --bg-white:   #FFFFFF;
      --bg-light:   #F8FAFC;
      --bg-divider: #1E3A5F;

      /* Semantic */
      --success: #10B981;
      --warning: #F59E0B;
      --danger:  #EF4444;
      --info:    #3B82F6;

      /* Chart Colors */
      --chart-1: #2563EB;
      --chart-2: #F59E0B;
      --chart-3: #10B981;
      --chart-4: #EF4444;
      --chart-5: #8B5CF6;
      --chart-6: #EC4899;
      --chart-7: #14B8A6;
      --chart-8: #F97316;

      /* Fonts */
      --font-heading: 'Noto Sans JP', sans-serif;
      --font-body:    'Noto Sans JP', sans-serif;
      --font-number:  'Inter', sans-serif;

      /* Slide Dimensions */
      --slide-width:  1280px;
      --slide-height: 720px;
    }

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

    body {
      font-family: var(--font-body);
      background: #0F172A;
      color: var(--text-primary);
      overflow: hidden;
      -webkit-font-smoothing: antialiased;
    }

    ul, ol { list-style: none; }

    /* ======================================
       3. Presentation Layout
       ====================================== */
    .presentation {
      position: relative;
      width: 100vw;
      height: 100vh;
    }

    .slide {
      position: absolute;
      top: 0;
      left: 0;
      width: var(--slide-width);
      height: var(--slide-height);
      transform-origin: top left;
      display: none;
      flex-direction: column;
      overflow: hidden;
    }

    .slide.active {
      display: flex;
    }

    /* ======================================
       4. Title Slide
       ====================================== */
    .slide.title-slide {
      background: var(--bg-white);
      justify-content: center;
      align-items: center;
      text-align: center;
      padding: 60px 80px;
      position: relative;
    }

    .title-slide::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: var(--primary-700);
    }

    .title-slide h1 {
      font-family: var(--font-heading);
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--primary-900);
      margin-bottom: 16px;
      line-height: 1.3;
    }

    .title-slide .subtitle {
      font-size: 1.2rem;
      color: var(--text-secondary);
      margin-bottom: 8px;
    }

    .title-slide .meta {
      font-size: 0.9rem;
      color: var(--text-secondary);
      margin-top: 24px;
    }

    /* ======================================
       5. Divider Slide
       ====================================== */
    .slide.divider-slide {
      background: var(--bg-divider);
      justify-content: center;
      align-items: center;
      text-align: center;
      padding: 60px 80px;
    }

    .divider-slide .section-number {
      display: block;
      font-family: var(--font-number);
      font-size: 1rem;
      font-weight: 600;
      color: var(--accent-500);
      letter-spacing: 3px;
      text-transform: uppercase;
      margin-bottom: 16px;
    }

    .divider-slide h2 {
      font-family: var(--font-heading);
      font-size: 2rem;
      font-weight: 700;
      color: var(--text-light);
      margin-bottom: 12px;
      line-height: 1.3;
    }

    .divider-slide .section-sub {
      font-size: 1rem;
      color: var(--primary-300);
    }

    /* ======================================
       6. Content Slide
       ====================================== */
    .slide.content-slide {
      background: var(--bg-white);
      padding: 48px 80px 40px;
    }

    .content-slide .slide-header {
      border-top: 3px solid var(--primary-700);
      padding-top: 16px;
      margin-bottom: 4px;
    }

    .content-slide h3 {
      font-family: var(--font-heading);
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--primary-900);
      line-height: 1.4;
    }

    .content-slide .slide-description {
      font-size: 1rem;
      color: var(--text-secondary);
      margin-bottom: 20px;
      line-height: 1.6;
    }

    .content-slide .slide-body {
      flex: 1;
      display: flex;
      align-items: center;
      justify-content: center;
      min-height: 0;
    }

    /* ======================================
       7. Navigation & UI
       ====================================== */
    .progress-bar {
      position: fixed;
      top: 0;
      left: 0;
      height: 3px;
      background: var(--primary-500);
      transition: width 0.3s ease;
      z-index: 1000;
    }

    .slide-counter {
      position: fixed;
      bottom: 16px;
      right: 24px;
      font-family: var(--font-number);
      font-size: 0.8rem;
      color: rgba(255,255,255,0.5);
      z-index: 1000;
      pointer-events: none;
    }

    .slide.title-slide ~ .slide-counter,
    .slide.content-slide ~ .slide-counter {
      color: var(--text-secondary);
    }

    .keyboard-hint {
      position: fixed;
      bottom: 16px;
      left: 50%;
      transform: translateX(-50%);
      font-size: 0.75rem;
      color: rgba(255,255,255,0.4);
      z-index: 1000;
      transition: opacity 0.5s;
    }

    /* ======================================
       8. Component Styles
       ====================================== */

    /* Card */
    .card {
      background: var(--bg-white);
      border: 1px solid var(--primary-100);
      border-radius: 8px;
      padding: 20px;
      box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    }

    /* Accent Box */
    .accent-box {
      background: var(--primary-50);
      border-left: 4px solid var(--primary-700);
      padding: 16px 20px;
      border-radius: 0 8px 8px 0;
      font-size: 0.85rem;
      color: var(--text-primary);
      line-height: 1.5;
    }

    /* Stat / KPI Number */
    .stat { text-align: center; }
    .stat-number {
      font-family: var(--font-number);
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--primary-700);
      line-height: 1;
    }
    .stat-label {
      font-size: 0.875rem;
      color: var(--text-secondary);
      margin-top: 4px;
    }
    .stat-unit {
      font-size: 1rem;
      font-weight: 400;
      color: var(--text-secondary);
    }
    .stat-context {
      font-size: 0.75rem;
      color: var(--text-secondary);
    }

    /* Tags / Badges */
    .tag {
      display: inline-block;
      padding: 4px 12px;
      border-radius: 999px;
      font-size: 0.75rem;
      font-weight: 600;
    }
    .tag-primary { background: var(--primary-100); color: var(--primary-700); }
    .tag-accent  { background: var(--accent-100);  color: var(--accent-500); }
    .tag-success { background: #D1FAE5;            color: var(--success); }
    .tag-danger  { background: #FEE2E2;            color: var(--danger); }

    /* Slide Source */
    .slide-source {
      font-size: 0.7rem;
      color: var(--text-secondary);
      padding-top: 8px;
      border-top: 1px solid var(--primary-50);
      margin-top: auto;
    }

    /* ======================================
       9. Diagram Base Styles
       ====================================== */

    /* --- Tree --- */
    .diagram-tree { display: flex; flex-direction: column; align-items: center; gap: 24px; width: 100%; }
    .tree-node {
      background: var(--primary-100); border: 2px solid var(--primary-500);
      border-radius: 8px; padding: 10px 20px; font-weight: 600;
      color: var(--text-primary); text-align: center; position: relative;
    }
    .tree-root { background: var(--primary-700); color: white; font-size: 1.1rem; }
    .tree-level { display: flex; gap: 40px; justify-content: center; }
    .tree-branch { display: flex; flex-direction: column; align-items: center; gap: 16px; }
    .tree-children { display: flex; gap: 16px; }
    .tree-leaf { background: var(--primary-50); border-color: var(--primary-300); font-weight: 400; }

    /* --- Pyramid --- */
    .diagram-pyramid { display: flex; justify-content: center; align-items: center; }
    .diagram-pyramid svg text { font-family: var(--font-heading); }

    /* --- Flow Horizontal --- */
    .diagram-flow-h { display: flex; align-items: center; justify-content: center; gap: 8px; width: 100%; }
    .flow-step {
      display: flex; flex-direction: column; align-items: center; gap: 8px;
      background: var(--bg-white); border: 2px solid var(--primary-500);
      border-radius: 12px; padding: 20px; min-width: 140px; text-align: center;
      flex: 1; max-width: 200px;
    }
    .flow-icon {
      width: 36px; height: 36px; border-radius: 50%;
      background: var(--primary-700); color: white;
      display: flex; align-items: center; justify-content: center;
      font-family: var(--font-number); font-weight: 700; font-size: 0.9rem;
    }
    .flow-label { font-weight: 700; color: var(--text-primary); font-size: 0.95rem; }
    .flow-desc { font-size: 0.8rem; color: var(--text-secondary); }
    .flow-arrow { font-size: 1.5rem; color: var(--primary-500); font-weight: 700; flex-shrink: 0; }

    /* --- Flow Vertical --- */
    .diagram-flow-v { display: flex; flex-direction: column; align-items: center; gap: 4px; width: 100%; }
    .flow-v-step { display: flex; align-items: center; gap: 20px; width: 100%; }
    .flow-v-node {
      min-width: 200px; padding: 14px 20px;
      background: var(--primary-100); border-left: 4px solid var(--primary-700);
      border-radius: 0 8px 8px 0; font-weight: 600;
    }
    .flow-v-detail { flex: 1; font-size: 0.9rem; color: var(--text-secondary); }
    .flow-v-connector { width: 2px; height: 16px; background: var(--primary-300); margin-left: 100px; }

    /* --- Cycle --- */
    .diagram-cycle { display: flex; justify-content: center; align-items: center; }
    .diagram-cycle svg text { font-family: var(--font-heading); }

    /* --- Before / After --- */
    .diagram-before-after { display: flex; align-items: stretch; gap: 0; width: 100%; height: 100%; }
    .ba-side { flex: 1; padding: 24px; border-radius: 12px; display: flex; flex-direction: column; }
    .ba-before { background: var(--bg-light); border: 2px solid #E2E8F0; }
    .ba-after  { background: var(--primary-50); border: 2px solid var(--primary-500); }
    .ba-label { font-weight: 700; font-size: 1.1rem; margin-bottom: 16px; padding-bottom: 8px; border-bottom: 2px solid; }
    .ba-before .ba-label { color: var(--text-secondary); border-color: #E2E8F0; }
    .ba-after .ba-label  { color: var(--primary-700); border-color: var(--primary-500); }
    .ba-divider { display: flex; align-items: center; justify-content: center; width: 48px; flex-shrink: 0; }
    .ba-arrow { font-size: 1.5rem; color: var(--primary-500); }
    .ba-content ul { list-style: none; padding: 0; }
    .ba-content li { padding: 8px 0; border-bottom: 1px solid rgba(0,0,0,0.06); font-size: 0.95rem; color: var(--text-primary); }

    /* --- Map --- */
    .diagram-map { display: flex; gap: 24px; align-items: center; width: 100%; }
    .map-container { position: relative; flex: 1; }
    .map-image { width: 100%; height: auto; }
    .map-pin { position: absolute; display: flex; align-items: center; gap: 6px; }
    .pin-dot { width: 12px; height: 12px; border-radius: 50%; background: var(--primary-700); border: 2px solid white; box-shadow: 0 1px 4px rgba(0,0,0,0.2); }
    .pin-label { font-size: 0.8rem; font-weight: 600; color: var(--text-primary); background: white; padding: 2px 8px; border-radius: 4px; box-shadow: 0 1px 3px rgba(0,0,0,0.1); }

    /* --- Honeycomb --- */
    .diagram-honeycomb { display: flex; flex-direction: column; align-items: center; gap: 4px; }
    .hex-row { display: flex; gap: 8px; }
    .hex-offset { margin-top: -20px; }
    .hex-cell {
      width: 120px; height: 104px;
      background: var(--primary-100); color: var(--text-primary);
      clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
      display: flex; align-items: center; justify-content: center;
      font-weight: 600; font-size: 0.9rem; text-align: center;
    }
    .hex-cell.accent { background: var(--primary-700); color: white; }

    /* --- Matrix --- */
    .diagram-matrix { display: flex; flex-direction: column; align-items: center; gap: 8px; width: 100%; }
    .matrix-wrapper { display: flex; align-items: center; gap: 8px; }
    .matrix-grid { display: grid; grid-template-columns: 1fr 1fr; grid-template-rows: 1fr 1fr; gap: 4px; width: 600px; height: 380px; }
    .matrix-cell { padding: 16px; border-radius: 8px; background: var(--bg-light); }
    .matrix-cell.highlight { background: var(--primary-100); border: 2px solid var(--primary-500); }
    .matrix-q-label { font-weight: 700; color: var(--primary-700); font-size: 0.9rem; margin-bottom: 8px; }
    .matrix-item { display: inline-block; padding: 4px 12px; background: white; border-radius: 6px; font-size: 0.85rem; margin: 4px; border: 1px solid var(--primary-200); }
    .matrix-ylabel { writing-mode: vertical-rl; font-size: 0.8rem; color: var(--text-secondary); text-align: center; }
    .matrix-xlabel { font-size: 0.8rem; color: var(--text-secondary); text-align: center; }

    /* --- Venn --- */
    .diagram-venn { display: flex; justify-content: center; align-items: center; }
    .diagram-venn svg text { font-family: var(--font-heading); }

    /* --- Equation --- */
    .diagram-equation { display: flex; align-items: center; justify-content: center; gap: 20px; }
    .eq-term { text-align: center; padding: 20px; }
    .eq-icon { font-size: 2.5rem; margin-bottom: 8px; }
    .eq-label { font-weight: 600; font-size: 1.1rem; color: var(--text-primary); }
    .eq-operator { font-size: 2rem; font-weight: 700; color: var(--primary-500); font-family: var(--font-number); }
    .eq-result { background: var(--primary-100); border-radius: 12px; border: 2px solid var(--primary-500); }

    /* --- Group Small --- */
    .diagram-group-small { display: flex; gap: 24px; justify-content: center; align-items: stretch; flex-wrap: wrap; width: 100%; }
    .group-item {
      flex: 1; min-width: 200px; max-width: 320px; text-align: center; padding: 24px 16px;
      background: var(--bg-white); border: 2px solid var(--primary-300);
      border-radius: 12px; display: flex; flex-direction: column;
    }
    .group-item-desc { flex: 1; }
    .group-item-icon { font-size: 2rem; margin-bottom: 12px; color: var(--primary-700); }
    .group-item-title { font-weight: 700; font-size: 1rem; color: var(--text-primary); margin-bottom: 8px; }
    .group-item-desc { font-size: 0.8rem; color: var(--text-secondary); line-height: 1.5; text-align: left; }

    /* --- Group Large --- */
    .diagram-group-large { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 12px; width: 100%; }
    .group-l-item { padding: 12px; background: var(--primary-50); border-radius: 8px; text-align: center; font-size: 0.85rem; color: var(--text-primary); }
    .group-category { grid-column: 1 / -1; font-weight: 700; color: var(--primary-700); padding: 8px 0; border-bottom: 2px solid var(--primary-100); }

    /* --- Comparison Table --- */
    .diagram-comparison { width: 100%; overflow: auto; }
    .comparison-table { width: 100%; border-collapse: separate; border-spacing: 0 4px; }
    .comparison-table th { padding: 12px 16px; font-weight: 600; text-align: center; font-size: 0.9rem; }
    .comparison-table th.highlight { background: var(--primary-700); color: white; border-radius: 8px 8px 0 0; }
    .comparison-table th.other { background: var(--bg-light); color: var(--text-secondary); border-radius: 8px 8px 0 0; }
    .comparison-table td { padding: 10px 16px; text-align: center; font-size: 0.85rem; }
    .comparison-table td.highlight { background: var(--primary-50); font-weight: 600; color: var(--primary-700); }
    .comparison-table td.other { background: var(--bg-light); color: var(--text-secondary); }
    .comparison-table .feature-name { text-align: left; font-weight: 600; color: var(--text-primary); background: white; }

    /* --- Scale Comparison --- */
    .diagram-scale { display: flex; align-items: flex-end; justify-content: center; gap: 40px; }
    .scale-item { display: flex; flex-direction: column; align-items: center; gap: 12px; }
    .scale-circle {
      border-radius: 50%; background: var(--primary-100); border: 3px solid var(--primary-500);
      display: flex; align-items: center; justify-content: center;
    }
    .scale-value { font-family: var(--font-number); font-weight: 700; color: var(--primary-700); font-size: 1rem; }
    .scale-label { font-weight: 600; color: var(--text-primary); font-size: 0.9rem; }

    /* --- TAM-SAM-SOM --- */
    .diagram-tam { display: flex; justify-content: center; align-items: center; }
    .diagram-tam svg text { font-family: var(--font-number); }

    /* --- Layers --- */
    .diagram-layers { display: flex; flex-direction: column; align-items: center; gap: 4px; width: 80%; margin: 0 auto; }
    .layer {
      width: 100%; padding: 16px 24px; text-align: center; font-weight: 600;
      border-radius: 8px; color: var(--text-primary); font-size: 0.95rem;
    }
    .layer:nth-child(1) { background: var(--primary-700); color: white; }
    .layer:nth-child(2) { background: var(--primary-500); color: white; }
    .layer:nth-child(3) { background: var(--primary-300); }
    .layer:nth-child(4) { background: var(--primary-100); }
    .layer:nth-child(5) { background: var(--primary-50); }

    /* --- Triangle --- */
    .diagram-triangle { display: flex; justify-content: center; align-items: center; }
    .diagram-triangle svg text { font-family: var(--font-heading); }

    /* --- Steps / Stairs --- */
    .diagram-steps { display: flex; align-items: flex-end; justify-content: center; gap: 4px; height: 100%; padding-bottom: 20px; }
    .step-block {
      display: flex; flex-direction: column; justify-content: flex-end; align-items: center;
      padding: 12px 16px; min-width: 140px; border-radius: 8px 8px 0 0;
      background: var(--primary-100); border: 2px solid var(--primary-500); border-bottom: none;
    }
    .step-block.current { background: var(--primary-700); color: white; border-color: var(--primary-900); }
    .step-number { font-family: var(--font-number); font-weight: 700; font-size: 1.5rem; }
    .step-label { font-weight: 600; font-size: 0.85rem; margin-top: 4px; text-align: center; }
    .step-desc { font-size: 0.7rem; color: var(--text-secondary); margin-top: 4px; text-align: center; line-height: 1.3; }
    .step-block.current .step-desc { color: var(--primary-200); }

    /* --- Gantt Chart --- */
    .diagram-gantt { width: 100%; overflow: auto; }
    .gantt-header { display: grid; gap: 1px; margin-bottom: 4px; }
    .gantt-month { text-align: center; font-size: 0.75rem; color: var(--text-secondary); font-weight: 600; padding: 4px; }
    .gantt-row { display: grid; gap: 1px; margin-bottom: 2px; align-items: center; }
    .gantt-task-name { font-size: 0.8rem; font-weight: 600; color: var(--text-primary); padding: 8px 4px; }
    .gantt-cell { position: relative; height: 32px; background: var(--bg-light); border-radius: 2px; }
    .gantt-bar {
      position: absolute; top: 4px; bottom: 4px;
      background: var(--primary-500); border-radius: 4px;
      display: flex; align-items: center; padding: 0 8px;
      font-size: 0.7rem; color: white; font-weight: 600;
    }
    .gantt-bar.accent { background: var(--accent-500); }

    /* --- Bullets Vertical --- */
    .diagram-bullets-v { padding: 0 20px; width: 100%; }
    .bullet-item-v {
      display: flex; align-items: flex-start; gap: 16px;
      padding: 12px 0; border-bottom: 1px solid var(--primary-50);
    }
    .bullet-marker {
      width: 8px; height: 8px; border-radius: 50%;
      background: var(--primary-500); margin-top: 7px; flex-shrink: 0;
    }
    .bullet-text { color: var(--text-primary); font-size: 1rem; line-height: 1.5; }
    .bullet-text strong { color: var(--primary-900); }

    /* --- Bullets Horizontal --- */
    .diagram-bullets-h { display: flex; gap: 24px; justify-content: center; width: 100%; }
    .bullet-card {
      flex: 1; padding: 24px; text-align: center;
      background: var(--bg-white); border: 1px solid var(--primary-100);
      border-radius: 12px; border-top: 4px solid var(--primary-500);
    }
    .bullet-card-icon { font-size: 1.5rem; margin-bottom: 12px; color: var(--primary-700); }
    .bullet-card-title { font-weight: 700; color: var(--primary-900); margin-bottom: 8px; font-size: 1rem; }
    .bullet-card-desc { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.5; text-align: left; }

    /* --- Bullets Scattered --- */
    .diagram-bullets-s { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; padding: 20px; }
    .bullet-tag {
      padding: 8px 20px; border-radius: 999px; font-size: 0.9rem; font-weight: 500;
      background: var(--primary-50); color: var(--primary-700);
      border: 1px solid var(--primary-200);
    }
    .bullet-tag.accent { background: var(--accent-100); color: var(--accent-500); border-color: var(--accent-300); }

    /* --- Timeline --- */
    .diagram-timeline {
      position: relative; display: flex; align-items: flex-start;
      justify-content: space-between; width: 100%; padding: 40px 0;
    }
    .timeline-line {
      position: absolute; top: 50px; left: 5%; right: 5%;
      height: 3px; background: var(--primary-200);
    }
    .timeline-item {
      display: flex; flex-direction: column; align-items: center;
      position: relative; z-index: 1; flex: 1; text-align: center;
    }
    .timeline-date {
      font-family: var(--font-number); font-weight: 600;
      font-size: 0.85rem; color: var(--primary-700); margin-bottom: 12px;
    }
    .timeline-dot {
      width: 16px; height: 16px; border-radius: 50%;
      background: var(--bg-white); border: 3px solid var(--primary-500);
      margin-bottom: 12px;
    }
    .timeline-dot.active {
      background: var(--primary-700); border-color: var(--primary-700);
      width: 20px; height: 20px; box-shadow: 0 0 0 4px var(--primary-100);
    }
    .timeline-content { max-width: 200px; }
    .timeline-title { font-weight: 700; font-size: 0.9rem; color: var(--text-primary); margin-bottom: 4px; }
    .timeline-desc { font-size: 0.75rem; color: var(--text-secondary); line-height: 1.4; }

    /* --- Funnel --- */
    .diagram-funnel {
      display: flex; flex-direction: column; align-items: center; gap: 6px;
      width: 100%; padding: 10px 0;
    }
    .funnel-stage {
      display: flex; align-items: center; gap: 12px;
      width: var(--funnel-width); transition: width 0.3s;
    }
    .funnel-bar {
      flex: 1; display: flex; justify-content: space-between; align-items: center;
      padding: 14px 24px; border-radius: 6px;
      background: var(--primary-100); font-weight: 600;
    }
    .funnel-bar.accent { background: var(--primary-700); color: white; }
    .funnel-label { color: var(--text-primary); font-size: 0.95rem; }
    .funnel-bar.accent .funnel-label { color: white; }
    .funnel-value { font-family: var(--font-number); font-weight: 700; color: var(--primary-700); }
    .funnel-bar.accent .funnel-value { color: var(--accent-300); }
    .funnel-rate {
      font-family: var(--font-number); font-size: 0.8rem; font-weight: 600;
      color: var(--text-secondary); white-space: nowrap;
    }
    .funnel-drop {
      font-size: 0.7rem; color: var(--danger); font-weight: 600; white-space: nowrap;
    }

    /* --- KPI Dashboard --- */
    .diagram-kpi {
      display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 20px; width: 100%;
    }
    .kpi-card {
      background: var(--bg-white); border: 1px solid var(--primary-100);
      border-radius: 12px; padding: 24px; text-align: center;
      border-top: 4px solid var(--primary-500);
      box-shadow: 0 1px 3px rgba(0,0,0,0.06);
    }
    .kpi-icon { font-size: 1.5rem; margin-bottom: 8px; }
    .kpi-value {
      font-family: var(--font-number); font-size: 2.2rem; font-weight: 700;
      color: var(--primary-900); line-height: 1;
    }
    .kpi-unit { font-size: 1rem; font-weight: 400; color: var(--text-secondary); }
    .kpi-label { font-size: 0.85rem; color: var(--text-secondary); margin-top: 6px; margin-bottom: 8px; }
    .kpi-change {
      font-family: var(--font-number); font-size: 0.8rem; font-weight: 600;
      padding: 2px 10px; border-radius: 999px; display: inline-block;
    }
    .kpi-change.positive { background: #D1FAE5; color: var(--success); }
    .kpi-change.negative { background: #FEE2E2; color: var(--danger); }
    .kpi-change.neutral  { background: var(--bg-light); color: var(--text-secondary); }

    /* --- Quote / Testimonial --- */
    .diagram-quote { display: flex; justify-content: center; align-items: center; width: 100%; }
    .quote-block {
      max-width: 700px; padding: 32px 40px;
      background: var(--primary-50); border-left: 5px solid var(--primary-700);
      border-radius: 0 12px 12px 0; position: relative;
    }
    .quote-mark {
      font-size: 4rem; font-family: Georgia, serif; color: var(--primary-300);
      position: absolute; top: -10px; left: 16px; line-height: 1;
    }
    .quote-text {
      font-size: 1.1rem; line-height: 1.8; color: var(--text-primary);
      font-weight: 500; margin-bottom: 20px; padding-top: 16px;
    }
    .quote-footer { display: flex; align-items: center; gap: 12px; }
    .quote-avatar {
      width: 44px; height: 44px; border-radius: 50%;
      background: var(--primary-700); color: white;
      display: flex; align-items: center; justify-content: center;
      font-weight: 700; font-size: 0.9rem;
    }
    .quote-name { font-weight: 700; color: var(--text-primary); font-size: 0.9rem; }
    .quote-role { font-size: 0.8rem; color: var(--text-secondary); }

    /* --- Swimlane --- */
    .diagram-swimlane { width: 100%; display: flex; flex-direction: column; gap: 2px; }
    .swimlane-row { display: flex; align-items: stretch; min-height: 64px; }
    .swimlane-label {
      width: 100px; flex-shrink: 0; padding: 12px;
      background: var(--primary-900); color: white;
      font-weight: 600; font-size: 0.8rem;
      display: flex; align-items: center; justify-content: center;
      text-align: center; border-radius: 6px 0 0 6px;
    }
    .swimlane-lane {
      flex: 1; display: grid; grid-template-columns: repeat(8, 1fr);
      gap: 4px; padding: 8px; background: var(--bg-light);
      border-radius: 0 6px 6px 0; align-items: center;
    }
    .swimlane-task {
      padding: 10px 14px; background: var(--primary-100);
      border-radius: 6px; font-size: 0.8rem; font-weight: 600;
      color: var(--text-primary); text-align: center;
      border-left: 3px solid var(--primary-500);
    }
    .swimlane-task.accent {
      background: var(--accent-100); border-color: var(--accent-500);
      color: var(--accent-500);
    }

    /* --- Correlation (D3/SVG) --- */
    .diagram-correlation { display: flex; justify-content: center; align-items: center; width: 100%; height: 100%; }
    .diagram-correlation svg { overflow: visible; }

    /* --- Chart Container --- */
    .chart-container {
      position: relative;
      width: 100%;
      max-width: 700px;
      height: 380px;
      margin: 0 auto;
    }
    .chart-container canvas {
      width: 100% !important;
      height: 100% !important;
    }

    /* ======================================
       9b. Composite Layout Styles
       ====================================== */

    /* --- Stat Hero Grid (32) --- */
    .layout-stat-hero-grid { display: flex; flex-direction: column; gap: 20px; width: 100%; height: 100%; }
    .stat-hero-row {
      display: flex; gap: 16px; justify-content: center;
      padding: 16px 0; border-bottom: 2px solid var(--primary-100);
    }
    .stat-hero-item { text-align: center; flex: 1; padding: 8px 16px; }
    .stat-hero-value {
      font-family: var(--font-number); font-size: 2.2rem; font-weight: 700;
      color: var(--primary-700); line-height: 1;
    }
    .stat-hero-label { font-size: 0.85rem; color: var(--text-secondary); margin-top: 4px; font-weight: 600; }
    .stat-hero-context { font-size: 0.75rem; color: var(--text-secondary); margin-top: 2px; }
    .stat-hero-grid {
      display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; flex: 1;
    }
    .stat-hero-card {
      background: var(--bg-light); border-radius: 8px; padding: 16px;
      border-left: 3px solid var(--primary-500);
    }
    .stat-hero-card-title { font-weight: 700; font-size: 0.9rem; color: var(--primary-900); margin-bottom: 6px; }
    .stat-hero-card-detail { font-size: 0.8rem; color: var(--text-secondary); line-height: 1.5; }

    /* --- Split Panel (33) --- */
    .layout-split-panel { display: flex; gap: 24px; width: 100%; height: 100%; align-items: stretch; }
    .split-panel-left { flex: 5; display: flex; flex-direction: column; gap: 16px; justify-content: flex-start; }
    .split-panel-right { flex: 5; display: flex; flex-direction: column; align-items: center; justify-content: flex-start; gap: 12px; }
    .split-panel-heading { font-weight: 700; color: var(--primary-900); font-size: 1rem; margin-bottom: 4px; }
    .split-panel-list { list-style: none; padding: 0; }
    .split-panel-list li {
      padding: 10px 0; border-bottom: 1px solid var(--primary-50);
      font-size: 0.9rem; color: var(--text-primary); line-height: 1.5;
      padding-left: 16px; position: relative;
    }
    .split-panel-list li::before {
      content: ''; width: 6px; height: 6px; border-radius: 50%;
      background: var(--primary-500); position: absolute; left: 0; top: 16px;
    }

    /* --- Chart Callout (34) --- */
    .layout-chart-callout { display: flex; gap: 20px; width: 100%; height: 100%; align-items: stretch; }
    .chart-callout-main { flex: 6; display: flex; align-items: center; justify-content: center; }
    .chart-callout-main .chart-container { width: 100%; height: 100%; max-width: none; }
    .chart-callout-side { flex: 4; display: flex; flex-direction: column; gap: 12px; justify-content: center; }
    .callout-box {
      padding: 16px; border-radius: 8px; background: var(--bg-light);
      border-left: 3px solid var(--primary-500);
    }
    .callout-box.accent { background: var(--primary-50); border-color: var(--accent-500); }
    .callout-value {
      font-family: var(--font-number); font-size: 1.5rem; font-weight: 700;
      color: var(--primary-700); line-height: 1;
    }
    .callout-label { font-size: 0.8rem; font-weight: 600; color: var(--text-primary); margin-top: 4px; }
    .callout-desc { font-size: 0.75rem; color: var(--text-secondary); margin-top: 2px; }

    /* --- Tension Diagram (35) --- */
    .layout-tension { display: flex; align-items: stretch; gap: 0; width: 100%; height: 100%; }
    .tension-side {
      flex: 4; padding: 24px; display: flex; flex-direction: column;
      justify-content: center; gap: 16px; border-radius: 12px;
    }
    .tension-left { background: var(--primary-50); border: 2px solid var(--primary-300); }
    .tension-right { background: var(--accent-100); border: 2px solid var(--accent-300); }
    .tension-header {
      font-size: 1.2rem; font-weight: 700; text-align: center;
      padding-bottom: 8px; border-bottom: 2px solid;
    }
    .tension-left .tension-header { color: var(--primary-700); border-color: var(--primary-300); }
    .tension-right .tension-header { color: var(--accent-500); border-color: var(--accent-300); }
    .tension-points { list-style: none; padding: 0; }
    .tension-points li {
      padding: 6px 0; font-size: 0.9rem; color: var(--text-primary);
      border-bottom: 1px solid rgba(0,0,0,0.06);
    }
    .tension-strategy {
      text-align: center; font-weight: 700; font-size: 0.95rem;
      padding: 8px; border-radius: 6px;
    }
    .tension-left .tension-strategy { background: var(--primary-100); color: var(--primary-700); }
    .tension-right .tension-strategy { background: var(--accent-100); color: var(--accent-500); }
    .tension-center {
      flex: 2; display: flex; flex-direction: column; align-items: center;
      justify-content: center; gap: 8px;
    }
    .tension-vs {
      font-family: var(--font-number); font-size: 1.5rem; font-weight: 700;
      color: var(--danger); background: #FEE2E2; width: 48px; height: 48px;
      border-radius: 50%; display: flex; align-items: center; justify-content: center;
    }
    .tension-arrows { display: flex; gap: 16px; color: var(--text-secondary); font-size: 1.2rem; }
    .tension-context { font-size: 0.8rem; color: var(--text-secondary); text-align: center; font-weight: 600; }

    /* --- Multi Timeline (36) --- */
    .layout-multi-timeline { display: flex; flex-direction: column; width: 100%; height: 100%; gap: 2px; }
    .mt-header { display: flex; align-items: center; }
    .mt-lane-label {
      width: 90px; flex-shrink: 0; font-size: 0.75rem; font-weight: 700;
      color: var(--primary-900); padding: 4px 8px; text-align: right;
    }
    .mt-months {
      flex: 1; display: flex; justify-content: space-between;
      padding: 4px 8px; font-size: 0.7rem; color: var(--text-secondary); font-weight: 600;
    }
    .mt-lane { display: flex; align-items: center; min-height: 40px; }
    .mt-lane-track {
      flex: 1; position: relative; height: 32px;
      background: var(--bg-light); border-radius: 4px;
      border-bottom: 1px solid var(--primary-50);
    }
    .mt-event { position: absolute; top: 50%; transform: translate(-50%, -50%); text-align: center; z-index: 1; }
    .mt-dot {
      width: 14px; height: 14px; border-radius: 50%; margin: 0 auto 2px;
      border: 2px solid white; box-shadow: 0 1px 3px rgba(0,0,0,0.15);
    }
    .mt-dot.model { background: var(--chart-1); }
    .mt-dot.product { background: var(--chart-3); }
    .mt-dot.regulation { background: var(--chart-4); }
    .mt-dot.funding { background: var(--chart-2); }
    .mt-dot.legal { background: var(--chart-5); }
    .mt-dot.merger { background: var(--chart-8); }
    .mt-event-label { font-size: 0.6rem; color: var(--text-secondary); white-space: nowrap; font-weight: 600; }

    /* --- Transition Text (narrative connection) --- */
    .transition-text {
      font-style: italic; color: var(--text-secondary);
      font-size: 0.85rem; margin-bottom: 4px; padding-left: 12px;
      border-left: 2px solid var(--primary-300); line-height: 1.5;
    }

    /* ======================================
       9c. Custom Table Styles for this presentation
       ====================================== */
    .data-table {
      width: 100%; border-collapse: collapse; font-size: 0.8rem;
    }
    .data-table th {
      background: var(--primary-700); color: white; padding: 10px 12px;
      text-align: left; font-weight: 600; font-size: 0.8rem;
    }
    .data-table td {
      padding: 8px 12px; border-bottom: 1px solid var(--primary-50);
      font-size: 0.8rem; color: var(--text-primary);
    }
    .data-table tr:nth-child(even) { background: var(--bg-light); }
    .data-table strong { color: var(--primary-700); }

    /* Heatmap table */
    .heatmap-table { width: 100%; border-collapse: collapse; font-size: 0.8rem; }
    .heatmap-table th {
      padding: 10px 12px; font-weight: 700; text-align: center; font-size: 0.8rem;
    }
    .heatmap-table td {
      padding: 12px; text-align: center; font-family: var(--font-number);
      font-weight: 700; font-size: 1rem; border: 2px solid white;
    }
    .heatmap-table .row-header {
      text-align: left; font-weight: 600; font-family: var(--font-body);
      font-size: 0.8rem; background: var(--bg-light); color: var(--text-primary);
    }
    .heat-critical { background: #FEE2E2; color: var(--danger); }
    .heat-high { background: #FEF3C7; color: #D97706; }
    .heat-medium { background: var(--primary-50); color: var(--primary-700); }
    .heat-low { background: var(--bg-light); color: var(--text-secondary); }

    /* Layer stack with details */
    .layer-detail { display: flex; gap: 12px; align-items: center; width: 100%; }
    .layer-detail .layer-info { font-size: 0.75rem; color: var(--text-secondary); text-align: left; flex: 1; }
    .layer-detail .layer-bar { flex: 2; text-align: center; }

    /* ======================================
       10. Utility Classes
       ====================================== */
    .flex-center { display: flex; align-items: center; justify-content: center; }
    .flex-between { display: flex; align-items: center; justify-content: space-between; }
    .flex-col { display: flex; flex-direction: column; }
    .gap-sm { gap: 8px; }
    .gap-md { gap: 16px; }
    .gap-lg { gap: 24px; }
    .gap-xl { gap: 40px; }
    .w-full { width: 100%; }
    .h-full { height: 100%; }
    .text-center { text-align: center; }
    .text-left { text-align: left; }
    .font-bold { font-weight: 700; }
    .font-semibold { font-weight: 600; }
    .text-sm { font-size: 0.875rem; }
    .text-lg { font-size: 1.125rem; }
    .text-xl { font-size: 1.25rem; }
    .text-2xl { font-size: 1.5rem; }
    .text-primary { color: var(--text-primary); }
    .text-secondary { color: var(--text-secondary); }
    .text-blue { color: var(--primary-700); }
    .text-accent { color: var(--accent-500); }
    .text-success { color: var(--success); }
    .text-danger { color: var(--danger); }
    .bg-primary-50 { background: var(--primary-50); }
    .bg-primary-100 { background: var(--primary-100); }
    .rounded { border-radius: 8px; }
    .rounded-lg { border-radius: 12px; }
    .p-sm { padding: 8px; }
    .p-md { padding: 16px; }
    .p-lg { padding: 24px; }

    /* ======================================
       11. Animations
       ====================================== */
    @keyframes fadeInUp {
      from { opacity: 0; transform: translateY(20px); }
      to   { opacity: 1; transform: translateY(0); }
    }

    @keyframes fadeIn {
      from { opacity: 0; }
      to   { opacity: 1; }
    }

    .slide.active .slide-header { animation: fadeInUp 0.4s ease-out; }
    .slide.active .slide-description { animation: fadeInUp 0.4s ease-out 0.1s both; }
    .slide.active .slide-body { animation: fadeInUp 0.5s ease-out 0.2s both; }
    .slide.active.divider-slide .section-number { animation: fadeIn 0.4s ease-out; }
    .slide.active.divider-slide h2 { animation: fadeInUp 0.4s ease-out 0.1s both; }
    .slide.active.divider-slide .section-sub { animation: fadeInUp 0.4s ease-out 0.2s both; }

    /* ======================================
       12. Print Styles
       ====================================== */
    @media print {
      body { background: white; overflow: visible; }
      .progress-bar,
      .slide-counter,
      .keyboard-hint { display: none; }
      .slide {
        position: relative !important;
        display: flex !important;
        transform: none !important;
        left: 0 !important;
        top: 0 !important;
        width: 100% !important;
        height: auto !important;
        min-height: 100vh;
        page-break-after: always;
      }
    }