@import url('https://fonts.googleapis.com/css2?family=Space+Mono:ital,wght@0,400;0,700;1,400&display=swap');

  :root {
    --deep-space: #0F0A1A;
    --eggplant: #2A1A3A;
    --electric-coral: #FF6B4A;
    --warm-cream: #F5F0E8;
    --warm-glow: #FF9D85;
    --dusk: #3D2D52;
    --haze: #544468;
    --heather: #7A6E8A;
    --driftwood: #A09790;
    --linen: #C8C1B6;
    --fog: #E8E2D8;
    --parchment: #FEFCF9;
    --ink: #1A1424;
    --ink-secondary: #5C5066;
    --cream-secondary: rgba(245,240,232,0.7);
    --blue-d: #6B9DBF;
    --blue-d-bright: #8BB8D8;
    --red-r: #C4655A;
    --red-r-bright: #D88A82;
    --neutral-nv: #8A8078;
    --coral-15: rgba(255,107,74,0.15);
    --coral-08: rgba(255,107,74,0.08);
    --coral-04: rgba(255,107,74,0.04);

    --fs-display: clamp(3.5rem, 5.5vw, 5rem);
    --fs-hero: clamp(2.5rem, 4vw, 3.4rem);
    --fs-h1: clamp(1.9rem, 3vw, 2.5rem);
    --fs-h2: clamp(1.45rem, 2.2vw, 1.7rem);
    --fs-h3: 1.3rem;
    --fs-body: 1rem;
    --fs-body-lg: 1.15rem;
    --fs-small: 0.95rem;
    --fs-micro: 0.78rem;
    --fs-nano: 0.67rem;
    --sp-section: 6rem;
    --sp-block: 3rem;
    --sp-element: 1.5rem;
  }

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

  html { scroll-behavior: smooth; }

  body {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-size: 18px;
    line-height: 1.6;
    color: var(--warm-cream);
    background: var(--deep-space);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
  }

  /* ═══════════════════════════════════════════
     TYPOGRAPHY
     ═══════════════════════════════════════════ */
  .t-display { font-size: var(--fs-display); font-weight: 700; line-height: 1.05; letter-spacing: -0.025em; }
  .t-hero { font-size: var(--fs-hero); font-weight: 700; line-height: 1.12; letter-spacing: -0.02em; }
  .t-h1 { font-size: var(--fs-h1); font-weight: 700; line-height: 1.2; letter-spacing: -0.015em; }
  .t-h2 { font-size: var(--fs-h2); font-weight: 700; line-height: 1.25; }
  .t-h3 { font-size: var(--fs-h3); font-weight: 700; line-height: 1.35; }
  .t-body { font-size: var(--fs-body); line-height: 1.65; }
  .t-body-lg { font-size: var(--fs-body-lg); line-height: 1.7; }
  .t-small { font-size: var(--fs-small); line-height: 1.5; }
  .t-label {
    font-family: 'Space Mono', monospace;
    font-size: var(--fs-micro);
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
  }
  .t-nano {
    font-family: 'Space Mono', monospace;
    font-size: var(--fs-nano);
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
  }

  .tc-coral { color: var(--electric-coral); }
  em.coral { font-style: italic; color: var(--electric-coral); }

  /* ═══════════════════════════════════════════
     SCROLL REVEAL
     ═══════════════════════════════════════════ */
  .reveal {
    opacity: 0;
    transform: translateY(32px);
    transition: opacity 0.7s ease, transform 0.7s ease;
  }
  .reveal.visible {
    opacity: 1;
    transform: translateY(0);
  }
  .reveal-delay-1 { transition-delay: 0.12s; }
  .reveal-delay-2 { transition-delay: 0.24s; }
  .reveal-delay-3 { transition-delay: 0.36s; }
  .reveal-delay-4 { transition-delay: 0.48s; }

  /* ═══════════════════════════════════════════
     SECTION LAYOUT
     ═══════════════════════════════════════════ */
  .section-pad { padding: var(--sp-section) 2rem; }
  .section-inner { max-width: 740px; margin: 0 auto; }
  .section-wide { max-width: 1100px; margin: 0 auto; }

  .surface-deep { background: var(--deep-space); }
  .surface-egg { background: var(--eggplant); }
  .surface-dusk { background: var(--dusk); }
  .surface-cream { background: var(--warm-cream); color: var(--ink); }
  .surface-parch { background: var(--parchment); color: var(--ink); }

  /* ═══════════════════════════════════════════
     METHODS TRAY
     ═══════════════════════════════════════════ */
  .methods-tray {
    border: 1px solid var(--coral-15);
    border-radius: 6px;
    overflow: hidden;
  }
  .methods-toggle {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 1.5rem;
    cursor: pointer;
    background: var(--coral-04);
    transition: background 0.2s ease;
    list-style: none;
  }
  .methods-toggle::-webkit-details-marker { display: none; }
  .methods-toggle:hover { background: var(--coral-08); }
  .methods-chevron {
    font-size: 0.7rem;
    color: var(--electric-coral);
    transition: transform 0.3s ease;
  }
  details.methods-tray[open] .methods-chevron { transform: rotate(180deg); }
  .methods-body {
    padding: 1.5rem;
    border-top: 1px solid var(--coral-15);
  }
  .methods-section {
    margin-bottom: 1.5rem;
  }
  .methods-section:last-child { margin-bottom: 0; }
  .methods-section h3 {
    font-size: var(--fs-small);
    font-weight: 700;
    color: var(--warm-cream);
    margin-bottom: 0.5rem;
  }
  .methods-section p {
    font-size: var(--fs-small);
    line-height: 1.6;
    color: var(--cream-secondary);
    margin-bottom: 0.5rem;
  }
  .methods-section p:last-child { margin-bottom: 0; }
  .methods-section code {
    font-family: 'Space Mono', monospace;
    font-size: 0.8em;
    background: var(--coral-08);
    padding: 0.15em 0.4em;
    border-radius: 3px;
    color: var(--warm-glow);
  }

  /* ═══════════════════════════════════════════
     SECTION 1: THE OPENING STORY
     ═══════════════════════════════════════════ */
  .hero-open {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
    text-align: center;
    position: relative;
  }
  .hero-open::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 200px;
    background: linear-gradient(transparent, var(--deep-space));
    pointer-events: none;
  }
  .hero-label {
    font-family: 'Space Mono', monospace;
    font-size: var(--fs-micro);
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--electric-coral);
    margin-bottom: 2rem;
    font-weight: 700;
    position: relative;
    z-index: 1;
  }
  .hero-title {
    font-size: var(--fs-display);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.025em;
    max-width: 900px;
    margin-bottom: 2rem;
  }
  .hero-sub {
    font-size: var(--fs-body-lg);
    color: var(--cream-secondary);
    max-width: 560px;
    margin: 0 auto;
  }

  .story-beat {
    padding: 5rem 2rem;
  }
  .story-beat .section-inner p {
    font-size: var(--fs-body-lg);
    line-height: 1.7;
    color: var(--cream-secondary);
    margin-bottom: var(--sp-element);
  }

  .truth-bomb {
    font-size: var(--fs-hero);
    font-weight: 700;
    line-height: 1.18;
    letter-spacing: -0.015em;
    padding: 2.5rem 0;
    border-top: 3px solid var(--electric-coral);
    border-bottom: 1px solid var(--coral-15);
    margin: var(--sp-block) 0;
  }
  .truth-bomb em { font-style: italic; color: var(--electric-coral); }

  .section-marker {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
  }
  .sm-number {
    font-family: 'Space Mono', monospace;
    font-size: var(--fs-micro);
    letter-spacing: 0.15em;
    color: var(--electric-coral);
    font-weight: 700;
  }
  .sm-line {
    flex: 1;
    height: 1px;
    background: var(--coral-15);
  }

  .stat-row {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    margin: var(--sp-block) 0;
  }
  .stat-block { flex: 1; min-width: 120px; }
  .stat-number {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--electric-coral);
    line-height: 1.1;
    margin-bottom: 0.3rem;
  }
  .stat-label {
    font-family: 'Space Mono', monospace;
    font-size: var(--fs-nano);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--cream-secondary);
  }
  .stat-context {
    font-size: var(--fs-nano);
    color: rgba(245,240,232,0.45);
    margin-top: 0.2rem;
  }

  /* ═══════════════════════════════════════════
     MODEL OVERLAY (cluster description card)
     ═══════════════════════════════════════════ */
  .model-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 3;
    text-align: center;
    width: 260px;
    background: rgba(15, 10, 26, 0.9);
    border: 1px solid rgba(255,107,74,0.2);
    border-radius: 6px;
    padding: 0.9rem 1.15rem;
    pointer-events: none;
    transition: opacity 0.3s ease;
  }
  .model-overlay-name {
    font-size: clamp(1.05rem, 1.8vw, 1.3rem);
    font-weight: 700;
    letter-spacing: -0.01em;
    margin-bottom: 0.25rem;
    transition: color 0.3s ease;
  }
  .model-overlay-desc {
    font-size: var(--fs-small);
    color: var(--cream-secondary);
    line-height: 1.45;
  }
  @media (max-width: 600px) {
    .model-overlay { width: 200px; padding: 0.7rem 0.9rem; }
  }

  /* ═══════════════════════════════════════════
     VIZ CONTROLS (shared: model + GSS)
     ═══════════════════════════════════════════ */
  .viz-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-top: 1.5rem;
  }
  .viz-dots {
    display: flex;
    gap: 0.45rem;
    align-items: center;
  }
  .viz-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    border: 1px solid rgba(245,240,232,0.35);
    background: transparent;
    cursor: pointer;
    padding: 0;
    transition: all 0.25s ease;
  }
  .viz-dot.active {
    border-color: var(--electric-coral);
    background: var(--electric-coral);
    transform: scale(1.25);
  }
  .viz-arrow {
    background: none;
    border: 1px solid var(--coral-15);
    color: var(--electric-coral);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.2s ease, border-color 0.2s ease;
    font-size: 0.9rem;
    padding: 0;
    line-height: 1;
  }
  .viz-arrow:hover {
    background: var(--coral-08);
    border-color: var(--electric-coral);
  }

  /* ═══════════════════════════════════════════
     SECTION 2: THE HEART VISUALIZATION
     ═══════════════════════════════════════════ */
  .heart-section {
    padding: 0 2rem 2rem;
    background: var(--warm-cream);
    color: var(--ink);
  }
  .heart-section .viz-prompt {
    color: var(--ink-secondary);
    opacity: 1;
  }
  .heart-section .detail-card {
    background: var(--eggplant);
    border: 1px solid var(--coral-15);
    color: var(--warm-cream);
  }
  .heart-section .card-body,
  .heart-section .card-transition {
    color: var(--cream-secondary);
  }
  .heart-section .card-meta {
    color: rgba(245,240,232,0.5);
  }
  .heart-section .card-title {
    color: var(--warm-cream);
  }
  .heart-section .card-label.family-nv { color: #C0B8B0; }
  .heart-section .card-transitions {
    border-top-color: var(--coral-15);
  }
  .heart-section .card-trans-grid {
    color: var(--cream-secondary);
  }
  .heart-section .card-trans-col-label {
    color: rgba(245,240,232,0.4);
  }
  .heart-section .card-trans-row.bold {
    color: var(--warm-cream);
  }
  .heart-section .card-gss {
    border-top-color: var(--coral-15);
  }
  .heart-section .card-gss-item {
    color: var(--cream-secondary);
  }
  .heart-section .card-gss-item strong {
    color: var(--warm-cream);
  }
  .heart-section .cluster-tag[data-family="d"] {
    background: rgba(107,157,191,0.1);
    color: #4A7A9A;
    border-color: rgba(107,157,191,0.3);
  }
  .heart-section .cluster-tag[data-family="d"]:hover,
  .heart-section .cluster-tag[data-family="d"].active {
    background: rgba(107,157,191,0.2);
    border-color: #6B9DBF;
  }
  .heart-section .cluster-tag[data-family="r"] {
    background: rgba(196,101,90,0.1);
    color: #A0504A;
    border-color: rgba(196,101,90,0.3);
  }
  .heart-section .cluster-tag[data-family="r"]:hover,
  .heart-section .cluster-tag[data-family="r"].active {
    background: rgba(196,101,90,0.2);
    border-color: #C4655A;
  }
  .heart-section .cluster-tag[data-family="nv"] {
    background: rgba(138,128,120,0.1);
    color: #6B6360;
    border-color: rgba(138,128,120,0.3);
  }
  .heart-section .cluster-tag[data-family="nv"]:hover,
  .heart-section .cluster-tag[data-family="nv"].active {
    background: rgba(138,128,120,0.2);
    border-color: #8A8078;
  }
  .heart-header {
    text-align: center;
    max-width: 740px;
    margin: 0 auto 2rem;
  }
  .viz-wrap {
    max-width: 700px;
    margin: 0 auto;
    position: relative;
  }
  .viz-wrap svg { width: 100%; height: auto; display: block; }

  /* Heart overlay card (inside viz-wrap, over the SVG) */
  .heart-overlay {
    position: absolute;
    top: 45%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 3;
    text-align: center;
    width: 260px;
    background: rgba(245, 240, 232, 0.95);
    border: 1px solid rgba(42,26,58,0.12);
    border-radius: 6px;
    padding: 0.9rem 1.15rem;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease;
  }
  .heart-overlay.visible { opacity: 1; }
  .heart-overlay-name {
    font-size: clamp(1.05rem, 1.8vw, 1.3rem);
    font-weight: 700;
    letter-spacing: -0.01em;
    margin-bottom: 0.25rem;
    color: var(--ink);
    transition: color 0.3s ease;
  }
  .heart-overlay-desc {
    font-size: var(--fs-small);
    color: var(--ink-secondary);
    line-height: 1.45;
  }
  @media (max-width: 600px) {
    .heart-overlay { width: 200px; padding: 0.7rem 0.9rem; }
  }
  .viz-prompt {
    text-align: center;
    margin-top: 1rem;
    font-size: var(--fs-small);
    color: var(--cream-secondary);
    opacity: 0.6;
  }

  .cluster-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    padding: var(--sp-element) 2rem;
    max-width: 1100px;
    margin: 0 auto;
  }
  .cluster-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    font-family: 'Space Mono', monospace;
    font-size: var(--fs-micro);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 0.45rem 0.9rem;
    border-radius: 3px;
    white-space: nowrap;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    background: none;
  }
  .cluster-tag .dot {
    width: 7px; height: 7px;
    border-radius: 50%;
    flex-shrink: 0;
  }
  .cluster-tag[data-family="d"] {
    background: rgba(139,184,216,0.12);
    color: #A8CEE8;
    border: 1px solid rgba(139,184,216,0.25);
  }
  .cluster-tag[data-family="d"] .dot { background: var(--blue-d-bright); }
  .cluster-tag[data-family="d"]:hover,
  .cluster-tag[data-family="d"].active {
    background: rgba(139,184,216,0.25);
    border-color: var(--blue-d-bright);
  }
  .cluster-tag[data-family="r"] {
    background: rgba(216,138,130,0.12);
    color: #E8A99F;
    border: 1px solid rgba(216,138,130,0.25);
  }
  .cluster-tag[data-family="r"] .dot { background: var(--red-r-bright); }
  .cluster-tag[data-family="r"]:hover,
  .cluster-tag[data-family="r"].active {
    background: rgba(216,138,130,0.25);
    border-color: var(--red-r-bright);
  }
  .cluster-tag[data-family="nv"] {
    background: rgba(168,158,148,0.12);
    color: #C0B8B0;
    border: 1px solid rgba(168,158,148,0.25);
  }
  .cluster-tag[data-family="nv"] .dot { background: #C0B8B0; }
  .cluster-tag[data-family="nv"]:hover,
  .cluster-tag[data-family="nv"].active {
    background: rgba(168,158,148,0.25);
    border-color: #C0B8B0;
  }
  .cluster-hit { cursor: pointer; }

  .detail-panel {
    max-width: 600px;
    margin: 0 auto;
    padding: 0 2rem 2rem;
    min-height: 180px;
  }
  .detail-card {
    background: var(--eggplant);
    border: 1px solid var(--coral-15);
    border-radius: 6px;
    padding: 1.5rem;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.3s ease, transform 0.3s ease;
  }
  .detail-card.visible {
    opacity: 1;
    transform: translateY(0);
  }
  .card-label {
    font-family: 'Space Mono', monospace;
    font-size: var(--fs-nano);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 0.4rem;
  }
  .card-label.family-d { color: var(--blue-d-bright); }
  .card-label.family-r { color: var(--red-r-bright); }
  .card-label.family-nv { color: #C0B8B0; }
  .card-title {
    font-size: var(--fs-h2);
    font-weight: 700;
    margin-bottom: 0.6rem;
  }
  .card-body {
    font-size: var(--fs-small);
    color: var(--cream-secondary);
    margin-bottom: 0.8rem;
    line-height: 1.6;
  }
  .card-meta {
    font-family: 'Space Mono', monospace;
    font-size: var(--fs-nano);
    color: rgba(245,240,232,0.5);
    letter-spacing: 0.06em;
    margin-bottom: 0.8rem;
  }
  .card-transition {
    font-size: var(--fs-small);
    color: var(--cream-secondary);
    border-top: 1px solid var(--coral-15);
    padding-top: 0.8rem;
    line-height: 1.6;
  }
  .card-transition-label {
    font-family: 'Space Mono', monospace;
    font-size: var(--fs-nano);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--electric-coral);
    display: block;
    margin-bottom: 0.3rem;
  }
  .card-section-label {
    font-family: 'Space Mono', monospace;
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--electric-coral);
    margin-bottom: 0.4rem;
  }
  .card-transitions {
    border-top: 1px solid var(--coral-15);
    padding-top: 0.8rem;
    margin-bottom: 0.8rem;
  }
  .card-trans-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 1.5rem;
    font-family: 'Space Mono', monospace;
    font-size: 0.9rem;
    color: var(--cream-secondary);
    line-height: 1.8;
  }
  .card-trans-col-label {
    font-size: 0.85rem;
    color: rgba(245,240,232,0.4);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 0.2rem;
  }
  .card-trans-row { display: flex; justify-content: space-between; }
  .card-trans-row.bold { color: var(--warm-cream); font-weight: 700; }
  .card-gss {
    border-top: 1px solid var(--coral-15);
    padding-top: 0.8rem;
  }
  .card-gss-item {
    font-size: var(--fs-small);
    color: var(--cream-secondary);
    line-height: 1.5;
    padding: 0.15rem 0;
  }
  .card-gss-item strong { color: var(--warm-cream); font-weight: 600; }

  /* ═══════════════════════════════════════════
     SECTION 3: FLOURISHING SCROLL
     ═══════════════════════════════════════════ */
  .callout-coral {
    border-left: 4px solid var(--electric-coral);
    padding: 1.25rem 1.5rem;
    margin: var(--sp-element) 0;
    background: var(--coral-04);
    border-radius: 0 4px 4px 0;
  }
  .callout-coral .callout-title {
    font-weight: 700;
    font-size: var(--fs-body);
    margin-bottom: 0.3rem;
    color: var(--electric-coral);
  }
  .callout-coral .callout-body {
    font-size: var(--fs-body);
    line-height: 1.6;
    color: var(--cream-secondary);
  }

  .callout-coral-light {
    border-left: 4px solid var(--electric-coral);
    padding: 1.25rem 1.5rem;
    margin: var(--sp-element) 0;
    background: var(--coral-08);
    border-radius: 0 4px 4px 0;
  }
  .callout-coral-light .callout-title {
    font-weight: 700;
    font-size: var(--fs-body);
    margin-bottom: 0.3rem;
    color: var(--electric-coral);
  }
  .callout-coral-light .callout-body {
    font-size: var(--fs-body);
    line-height: 1.6;
    color: var(--ink-secondary);
  }

  /* Method notes — dark surface */
  .method-note {
    border-left: 3px solid var(--haze);
    padding: 1rem 1.5rem;
    margin: var(--sp-element) 0;
    background: rgba(61,45,82,0.4);
    border-radius: 0 4px 4px 0;
  }
  .method-note .mn-label {
    font-family: 'Space Mono', monospace;
    font-size: var(--fs-nano);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--warm-glow);
    margin-bottom: 0.35rem;
    font-weight: 700;
  }
  .method-note .mn-body {
    font-size: var(--fs-small);
    line-height: 1.6;
    color: var(--cream-secondary);
  }

  /* Method notes — light surface (callout-egg from design guidance) */
  .method-note-light {
    border-left: 3px solid var(--eggplant);
    padding: 1rem 1.5rem;
    margin: var(--sp-element) 0;
    background: rgba(42,26,58,0.04);
    border-radius: 0 4px 4px 0;
  }
  .method-note-light .mn-label {
    font-family: 'Space Mono', monospace;
    font-size: var(--fs-nano);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--eggplant);
    margin-bottom: 0.35rem;
    font-weight: 700;
  }
  .method-note-light .mn-body {
    font-size: var(--fs-small);
    line-height: 1.6;
    color: var(--ink-secondary);
  }

  .pull-quote {
    font-size: var(--fs-h2);
    font-weight: 700;
    line-height: 1.25;
    padding: 2rem 0 2rem 2rem;
    border-left: 4px solid var(--electric-coral);
    margin: var(--sp-block) 0;
    color: var(--eggplant);
  }

  /* Flourishing meter visual */
  .flourish-meter {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 1.5rem 0;
  }
  .fm-label {
    font-family: 'Space Mono', monospace;
    font-size: var(--fs-nano);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    min-width: 100px;
    text-align: right;
  }
  .fm-bar {
    flex: 1;
    height: 6px;
    border-radius: 3px;
    background: rgba(255,107,74,0.12);
    position: relative;
    overflow: hidden;
  }
  .fm-fill {
    position: absolute;
    top: 0; left: 0; bottom: 0;
    border-radius: 3px;
    transition: width 1s cubic-bezier(0.16,1,0.3,1);
    width: 0;
  }
  .fm-fill.animated { width: var(--fill); }
  .fm-value {
    font-family: 'Space Mono', monospace;
    font-size: var(--fs-nano);
    min-width: 40px;
    letter-spacing: 0.06em;
  }

  /* ═══════════════════════════════════════════
     SECTION 4: PAGINATED STORY CARDS
     ═══════════════════════════════════════════ */
  .cards-intro { text-align: center; margin-bottom: 3rem; }

  /* Nav dots row */
  .story-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    margin-bottom: 2.5rem;
    padding: 0 1rem;
  }
  .story-nav-dot {
    position: relative;
    cursor: pointer;
    transition: transform 0.2s ease;
    -webkit-tap-highlight-color: transparent;
  }
  .story-nav-dot:hover { transform: scale(1.12); }

  .story-nav-label {
    font-family: 'Space Mono', monospace;
    font-size: var(--fs-nano);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    text-align: center;
    margin-top: 0.4rem;
    opacity: 0;
    transition: opacity 0.3s ease, color 0.3s ease;
    white-space: nowrap;
    color: var(--cream-secondary);
  }
  .story-nav-dot.sn-active .story-nav-label,
  .story-nav-dot:hover .story-nav-label {
    opacity: 1;
  }

  /* Card stage */
  /* ─── Card stage & flip ─── */
  .card-stage {
    max-width: 640px;
    margin: 0 auto;
    padding: 0 2rem;
    min-height: 400px;
    position: relative;
    perspective: 1600px;
  }
  .card-flipper {
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.6s cubic-bezier(0.45, 0, 0.2, 1);
  }
  .card-flipper.flipped { transform: rotateY(180deg); }
  .card-face {
    background: var(--eggplant);
    border: 1px solid rgba(245,240,232,0.08);
    border-radius: 8px;
    padding: 2.25rem;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    position: relative;
    overflow: hidden;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.45s ease, transform 0.45s ease;
  }
  .card-face.sc-visible { opacity: 1; transform: translateY(0); }
  .card-face::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
  }
  .card-face[data-family="d"]::before { background: var(--blue-d-bright); }
  .card-face[data-family="r"]::before { background: var(--red-r-bright); }
  .card-face[data-family="nv"]::before { background: #C0B8B0; }
  .card-back-face {
    position: absolute;
    top: 0; left: 0; right: 0;
    opacity: 1 !important;
    transform: rotateY(180deg) translateY(0) !important;
  }
  .sc-family {
    font-family: 'Space Mono', monospace;
    font-size: var(--fs-nano);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 0.6rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }
  .sc-family .dot { width: 6px; height: 6px; border-radius: 50%; flex-shrink: 0; }
  .sc-name { font-size: var(--fs-h2); font-weight: 700; margin-bottom: 0.3rem; }
  .sc-archetype {
    font-size: var(--fs-small);
    color: var(--electric-coral);
    font-style: italic;
    margin-bottom: 1.5rem;
  }
  .card-blurb {
    font-size: var(--fs-small);
    color: #9B8BB4;
    line-height: 1.65;
    font-style: italic;
    margin-bottom: 1.75rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid rgba(245,240,232,0.07);
  }
  .section-label {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    font-family: 'Space Mono', monospace;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 0.65rem;
  }
  .section-label svg { width: 13px; height: 13px; flex-shrink: 0; }
  .section-label--story    { color: var(--electric-coral); }
  .section-label--messenger { color: var(--blue-d); }
  .section-label--settings  { color: var(--neutral-nv); }
  .sc-story { font-size: var(--fs-body); color: var(--cream-secondary); line-height: 1.85; }
  .sc-story + .sc-story { margin-top: 0.9rem; }
  .beat-link {
    color: var(--warm-cream);
    font-weight: 700;
    cursor: pointer;
    border-bottom: 1.5px solid rgba(255,107,74,0.4);
    padding-bottom: 1px;
    transition: color 0.15s, border-color 0.15s;
  }
  .beat-link:hover { color: var(--warm-glow); border-bottom-color: var(--electric-coral); }
  .beat-link.active { color: var(--electric-coral); border-bottom-color: var(--electric-coral); }
  .surface-section--messenger .beat-link { border-bottom-color: rgba(107,157,191,0.4); }
  .surface-section--messenger .beat-link:hover { color: var(--blue-d-bright); border-bottom-color: var(--blue-d); }
  .surface-section--messenger .beat-link.active { color: var(--blue-d); border-bottom-color: var(--blue-d); }
  .surface-section--settings .beat-link { border-bottom-color: rgba(138,128,120,0.4); }
  .surface-section--settings .beat-link:hover { color: #A8A09A; border-bottom-color: var(--neutral-nv); }
  .surface-section--settings .beat-link.active { color: var(--neutral-nv); border-bottom-color: var(--neutral-nv); }
  .ev-panel {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.45s ease, opacity 0.3s ease, margin 0.3s ease;
    opacity: 0;
    margin: 0;
  }
  .ev-panel.open { max-height: 1600px; opacity: 1; margin: 0.85rem 0 0.1rem; }
  .ev-panel-inner {
    background: rgba(15,10,26,0.5);
    border-left: 2px solid var(--electric-coral);
    border-radius: 0 4px 4px 0;
    padding: 0.85rem 1.1rem;
  }
  .ev-beat-name {
    font-family: 'Space Mono', monospace;
    font-size: var(--fs-nano);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--warm-cream);
    font-weight: 700;
    margin-bottom: 0.4rem;
    opacity: 0.85;
  }
  .ev-beat-prose {
    font-size: 0.88rem;
    color: rgba(245,240,232,0.5);
    font-style: italic;
    line-height: 1.6;
    margin-bottom: 0.75rem;
  }
  .ev-lozenges { display: flex; flex-direction: column; gap: 0.45rem; }
  .ev-lozenge {
    display: flex;
    flex-direction: column;
    gap: 0.18rem;
    border-radius: 4px;
    padding: 0.5rem 0.8rem;
  }
  .ev-lozenge .ev-q { font-size: 0.9rem; color: rgba(245,240,232,0.5); font-style: italic; line-height: 1.45; }
  .ev-lozenge .ev-a { font-family: 'Space Mono', monospace; font-size: 0.85rem; letter-spacing: 0.03em; line-height: 1.4; }
  .ev-panel-inner .ev-lozenge { background: rgba(245,240,232,0.04); border: 1px solid rgba(255,107,74,0.15); }
  .ev-panel-inner .ev-lozenge .ev-a { color: var(--warm-glow); }
  .surface-section--messenger .ev-lozenge { background: rgba(107,157,191,0.05); border: 1px solid rgba(107,157,191,0.15); }
  .surface-section--messenger .ev-lozenge .ev-a { color: var(--blue-d-bright); }
  .surface-section--settings .ev-lozenge { background: rgba(138,128,120,0.05); border: 1px solid rgba(138,128,120,0.15); }
  .surface-section--settings .ev-lozenge .ev-a { color: #A8A09A; }
  .surface-section { margin-top: 1.5rem; }
  .surface-prose {
    font-size: var(--fs-body);
    color: var(--cream-secondary);
    line-height: 1.75;
    padding-left: 1rem;
    border-left: 2px solid;
    margin-bottom: 0.25rem;
  }
  .surface-section--messenger .surface-prose { border-color: rgba(107,157,191,0.4); }
  .surface-section--settings .surface-prose  { border-color: rgba(138,128,120,0.4); }
  .surface-panel {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.45s ease, opacity 0.3s ease, margin 0.3s ease;
    opacity: 0;
    margin: 0;
  }
  .surface-panel.open { max-height: 800px; opacity: 1; margin: 0.75rem 0 0; }
  .surface-panel-inner { padding-left: 1rem; border-left: 2px solid; }
  .surface-section--messenger .surface-panel-inner { border-color: rgba(107,157,191,0.4); }
  .surface-section--settings .surface-panel-inner  { border-color: rgba(138,128,120,0.4); }
  .back-story-context {
    font-size: var(--fs-body);
    color: var(--cream-secondary);
    line-height: 1.85;
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid rgba(255,107,74,0.15);
  }
  .stuck-block {
    margin: 0 0 1.5rem;
    padding-left: 1.25rem;
    border-left: 2px solid rgba(255,107,74,0.3);
  }
  .stuck-label {
    font-family: 'Space Mono', monospace;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--electric-coral);
    margin-bottom: 0.5rem;
  }
  .stuck-text {
    font-size: clamp(1.2rem, 2vw, 1.4rem);
    font-weight: 700;
    color: var(--warm-cream);
    line-height: 1.4;
    margin-bottom: 1.25rem;
    letter-spacing: -0.01em;
  }
  .play-label {
    font-family: 'Space Mono', monospace;
    font-size: var(--fs-nano);
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--electric-coral);
    margin-bottom: 0.4rem;
  }
  .play-text {
    font-size: var(--fs-body);
    color: var(--cream-secondary);
    line-height: 1.7;
    padding: 0.9rem 1.1rem;
    background: rgba(255,107,74,0.08);
    border-left: 2px solid var(--electric-coral);
    border-radius: 0 4px 4px 0;
    margin-bottom: 0.25rem;
  }
  .sc-story-resume {
    font-size: var(--fs-body);
    color: var(--cream-secondary);
    line-height: 1.85;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255,107,74,0.15);
    margin-bottom: 0.25rem;
  }
  .flip-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    font-family: 'Space Mono', monospace;
    font-size: var(--fs-nano);
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 0.35rem 0.85rem;
    border-radius: 20px;
    border: 1px solid rgba(255,107,74,0.35);
    background: transparent;
    color: var(--electric-coral);
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
    margin-top: 1.75rem;
  }
  .flip-btn:hover { background: rgba(255,107,74,0.1); border-color: var(--electric-coral); }
  .flip-btn svg { width: 11px; height: 11px; flex-shrink: 0; }

  /* Arrow nav below card */
  .card-arrows {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    margin-top: 2rem;
  }
  .card-arrow {
    background: none;
    border: 1px solid var(--coral-15);
    color: var(--electric-coral);
    width: 44px; height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.2s ease, border-color 0.2s ease;
    font-size: 1.2rem;
    padding: 0;
  }
  .card-arrow:hover {
    background: var(--coral-08);
    border-color: var(--electric-coral);
  }
  .card-arrow:disabled {
    opacity: 0.2;
    cursor: default;
    pointer-events: none;
  }
  .card-counter {
    font-family: 'Space Mono', monospace;
    font-size: var(--fs-micro);
    letter-spacing: 0.1em;
    color: var(--cream-secondary);
  }

  /* RikiLogo component styles (embedded) */

  .riki-logo { display: inline-block; position: relative; }
  .riki-logo svg { display: block; width: 100%; height: 100%; }
  .riki-logo .rl-bg {
    fill: var(--eggplant);
    opacity: 0;
    transform-origin: 250px 250px;
    transform: scale(0.88);
    transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.16,1,0.3,1);
  }
  .riki-logo.rl-has-bg .rl-bg { opacity: 1; transform: scale(1); }
  .riki-logo .rl-arc {
    fill: none;
    stroke: var(--electric-coral);
    stroke-width: 14;
    stroke-linecap: round;
    transition: stroke-dashoffset 0.7s cubic-bezier(0.16,1,0.3,1);
  }
  .riki-logo .rl-glow {
    fill: var(--warm-glow);
    opacity: 0;
    transform-origin: 250px 250px;
    transform: scale(0);
    transition: all 0.45s cubic-bezier(0.16,1,0.3,1);
  }
  .riki-logo .rl-dot {
    fill: var(--electric-coral);
    opacity: 0;
    transform-origin: 250px 250px;
    transform: scale(0);
    transition: all 0.35s cubic-bezier(0.34,1.56,0.64,1);
  }
  .riki-logo .rl-pip {
    fill: var(--warm-cream);
    opacity: 0;
    transform-origin: 250px 250px;
    transform: scale(0);
    transition: all 0.3s cubic-bezier(0.34,1.56,0.64,1) 0.04s;
  }
  .riki-logo.rl-has-center .rl-glow { opacity: 0.4; transform: scale(1); }
  .riki-logo.rl-has-center .rl-dot  { opacity: 1;   transform: scale(1); }
  .riki-logo.rl-has-center .rl-pip  { opacity: 1;   transform: scale(1); }
  .riki-logo.rl-seed .rl-glow { opacity: 0.4; transform: scale(1); }
  .riki-logo.rl-seed .rl-dot  { opacity: 1; transform: scale(1); }
  .riki-logo.rl-seed .rl-pip  { opacity: 1; transform: scale(1); }
  .riki-logo.rl-no-animate, .riki-logo.rl-no-animate * { transition: none !important; }
  .riki-logo.rl-clickable { cursor: pointer; }
  .riki-logo.rl-clickable:hover { filter: brightness(1.1); }

  /* ═══════════════════════════════════════════
     FOOTER
     ═══════════════════════════════════════════ */
  .page-footer {
    padding: 4rem 2rem;
    text-align: center;
  }

  /* ═══════════════════════════════════════════
     OMBRE WAVE — SURFACES & GRADIENTS
     ═══════════════════════════════════════════ */
  .surface-haze { background: var(--haze); }
  .surface-heather { background: var(--heather); }
  .surface-driftwood { background: var(--driftwood); color: var(--ink); }
  .surface-driftwood .sm-number { color: var(--eggplant); }
  .surface-driftwood .sm-line { background: rgba(42,26,58,0.2); }
  .surface-driftwood .t-h1 { color: var(--eggplant); }
  .surface-driftwood .tc-coral { color: var(--electric-coral); }
  .surface-driftwood p { color: var(--ink-secondary); }
  .surface-driftwood strong { color: var(--ink); }

  .surface-heather .sm-number { color: var(--warm-glow); }
  .surface-heather .tc-coral { color: var(--warm-glow); }

  /* 100px gradient connectors between ombre surfaces */
  .grad-deep-to-egg { height: 100px; background: linear-gradient(var(--deep-space), var(--eggplant)); }
  .grad-egg-to-dusk { height: 100px; background: linear-gradient(var(--eggplant), var(--dusk)); }
  .grad-dusk-to-haze { height: 100px; background: linear-gradient(var(--dusk), var(--haze)); }
  .grad-haze-to-heather { height: 100px; background: linear-gradient(var(--haze), var(--heather)); }
  .grad-heather-to-driftwood { height: 100px; background: linear-gradient(var(--heather), var(--driftwood)); }
  .grad-driftwood-to-cream { height: 100px; background: linear-gradient(var(--driftwood), var(--linen), var(--warm-cream)); }

  /* 160px ombre drop: cream back to deep space */
  .ombre-drop { height: 160px; background: linear-gradient(var(--warm-cream), var(--driftwood), var(--haze), var(--eggplant), var(--deep-space)); }

  /* ═══════════════════════════════════════════
     MODEL ILLUSTRATION (embedded from model_illustration.html)
     ═══════════════════════════════════════════ */
  .model-ill {
    max-width: 860px;
    margin: 0 auto;
  }
  .model-ill-title {
    text-align: center;
    margin-bottom: 2.5rem;
  }
  .model-ill-label {
    font-family: 'Space Mono', monospace;
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--electric-coral);
    margin-bottom: 0.4rem;
  }
  .model-ill-h {
    font-size: clamp(1.6rem, 2.8vw, 2.2rem);
    font-weight: 700;
    letter-spacing: -0.015em;
  }
  .model-graph {
    position: relative;
    height: 480px;
  }
  .model-graph svg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
  }
  .model-col {
    position: absolute;
    top: 0;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
    z-index: 2;
  }
  .model-col-left { left: 0; }
  .model-col-right { right: 0; }
  .model-col-label {
    font-family: 'Space Mono', monospace;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--warm-glow);
    margin-bottom: 0.8rem;
  }
  .model-col-left .model-col-label { text-align: left; }
  .model-col-right .model-col-label { text-align: right; }
  .model-node {
    font-size: 0.88rem;
    font-weight: 600;
    padding: 0.3rem 0;
    white-space: nowrap;
    transition: opacity 0.5s ease;
  }
  .model-col-right .model-node { text-align: right; }
  .model-node .mdot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    vertical-align: middle;
  }
  .model-col-left .model-node .mdot { margin-right: 0.5rem; }
  .model-col-right .model-node .mdot { margin-left: 0.5rem; }
  .model-node.dim { opacity: 0.18; }
  .model-conn {
    fill: none;
    stroke-linecap: round;
    transition: stroke-opacity 0.8s ease, stroke-width 0.8s ease;
  }
  .model-caption {
    text-align: center;
    margin-top: 2rem;
    font-size: 0.9rem;
    color: var(--cream-secondary);
    line-height: 1.55;
    max-width: 540px;
    margin-left: auto;
    margin-right: auto;
  }
  .model-caption em { color: var(--warm-cream); font-style: normal; font-weight: 600; }
  .model-node.hidden {
    opacity: 0;
    pointer-events: none;
    height: 0;
    padding: 0;
    overflow: hidden;
    transition: opacity 0.3s ease, height 0.3s ease, padding 0.3s ease;
  }
  .model-node.shown {
    height: auto;
    padding: 0.3rem 0;
    opacity: 1;
    transition: opacity 0.4s ease 0.15s, height 0.3s ease, padding 0.3s ease;
  }

  @media (max-width: 600px) {
    .model-graph { height: 420px; }
    .model-node { font-size: 0.78rem; }
  }

  /* GSS Question Cycling Viz */
  .gss-cycle-wrap {
    max-width: 620px;
    margin: 0 auto;
    min-height: 360px;
  }
  .gss-cycle-question {
    font-size: clamp(0.85rem, 1.6vw, 1rem);
    color: var(--cream-secondary);
    line-height: 1.5;
    margin-bottom: 0.3rem;
    min-height: 2.5em;
    transition: opacity 0.35s ease;
    font-style: italic;
  }
  .gss-cycle-sub {
    font-family: 'Space Mono', monospace;
    font-size: var(--fs-nano);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--electric-coral);
    margin-bottom: 1.2rem;
  }
  .gss-bar-row {
    display: flex;
    align-items: center;
    margin-bottom: 0.5rem;
    transition: opacity 0.35s ease;
  }
  .gss-bar-label {
    font-size: 0.82rem;
    font-weight: 600;
    width: 130px;
    min-width: 130px;
    text-align: right;
    padding-right: 0.8rem;
    white-space: nowrap;
  }
  .gss-bar-label.fam-d { color: var(--blue-d-bright); }
  .gss-bar-label.fam-r { color: var(--red-r-bright); }
  .gss-bar-label.fam-nv { color: #C0B8B0; }
  .gss-bar-track {
    flex: 1;
    height: 22px;
    background: rgba(245,240,232,0.06);
    border-radius: 3px;
    position: relative;
    overflow: hidden;
  }
  .gss-bar-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.7s ease;
    width: 0;
  }
  .gss-bar-fill.fam-d { background: var(--blue-d-bright); }
  .gss-bar-fill.fam-r { background: var(--red-r-bright); }
  .gss-bar-fill.fam-nv { background: #8A8078; }
  .gss-bar-val {
    font-family: 'Space Mono', monospace;
    font-size: 0.82rem;
    min-width: 36px;
    padding-left: 0.5rem;
    color: var(--cream-secondary);
  }
  @media (max-width: 500px) {
    .gss-bar-label { width: 90px; min-width: 90px; font-size: 0.82rem; }
  }

  /* ═══════════════════════════════════════════
     RESPONSIVE
     ═══════════════════════════════════════════ */
  @media (max-width: 680px) {
    .stat-row { gap: 1rem; }
    .stat-block { min-width: 90px; }
    .cards-grid { grid-template-columns: 1fr; }
    .story-beat { padding: 3rem 1.5rem; }
    .section-pad { padding: 4rem 1.5rem; }
  }