:root {
    --bg: #050507;
    --bg-deep: #000000;
    --bg-card: #0B0B12;
    --bg-card-2: #0F0F1A;
    --ink: #FFFFFF;
    --ink-soft: #C9C9D6;
    --muted: #7B7B8C;
    --muted-soft: #4F4F60;
    --rule: rgba(255,255,255,0.10);
    --rule-soft: rgba(255,255,255,0.06);
    --accent: #5C5CFF;
    --accent-soft: rgba(92, 92, 255, 0.14);
    --accent-border: rgba(92, 92, 255, 0.45);
    --accent-glow: rgba(92, 92, 255, 0.18);
  }
.ia-page {
    background: var(--bg-deep);
    color: var(--ink);
    font-family: 'Satoshi', system-ui, sans-serif;
    font-weight: 400;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    overflow-x: hidden;
  }

  .italic {
    font-family: 'Satoshi', system-ui, sans-serif;
    font-style: italic;
    font-weight: 700;
    color: var(--accent);
  }
  .mono {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 400;
    letter-spacing: -0.01em;
  }

  /* ─────────── LAYOUT ─────────── */
  main { position: relative; z-index: 2; }

  .ia-page section {
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 40px;
  }
  @media (max-width: 720px) {
    .ia-page section { padding: 0 24px; }
  }

  .eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 16px 7px 14px;
    background: var(--accent-soft);
    border: 1px solid var(--accent-border);
    border-radius: 999px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: var(--accent);
    margin-bottom: 32px;
  }
  .eyebrow::before {
    content: "";
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 10px var(--accent);
  }
  .eyebrow.plain {
    background: transparent;
    border: none;
    padding: 0;
    color: var(--accent);
    font-weight: 700;
    margin-bottom: 24px;
  }
  .eyebrow.plain::before { display: none; }

  /* ─────────── HERO ─────────── */
  .hero {
    padding-top: 200px;
    padding-bottom: 140px;
    position: relative;
    overflow: hidden;
  }
  .hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
      radial-gradient(ellipse 80% 60% at 70% 50%, rgba(92,92,255,0.10), transparent 60%),
      radial-gradient(ellipse 60% 80% at 20% 100%, rgba(92,92,255,0.06), transparent 70%),
      linear-gradient(180deg, #0A0A18 0%, #07070F 60%, var(--bg-deep) 100%);
    z-index: -2;
  }
  /* Star field */
  .hero::after {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
      radial-gradient(1px 1px at 20% 30%, rgba(255,255,255,0.5), transparent 50%),
      radial-gradient(1px 1px at 60% 70%, rgba(255,255,255,0.4), transparent 50%),
      radial-gradient(1px 1px at 80% 20%, rgba(255,255,255,0.6), transparent 50%),
      radial-gradient(1px 1px at 30% 80%, rgba(255,255,255,0.3), transparent 50%),
      radial-gradient(1px 1px at 50% 50%, rgba(255,255,255,0.5), transparent 50%),
      radial-gradient(1.5px 1.5px at 90% 60%, rgba(255,255,255,0.4), transparent 50%),
      radial-gradient(1px 1px at 10% 60%, rgba(255,255,255,0.4), transparent 50%),
      radial-gradient(1px 1px at 70% 10%, rgba(255,255,255,0.5), transparent 50%),
      radial-gradient(1px 1px at 40% 25%, rgba(255,255,255,0.3), transparent 50%),
      radial-gradient(1.5px 1.5px at 25% 50%, rgba(255,255,255,0.5), transparent 50%);
    background-size: 300px 300px, 250px 250px, 350px 350px, 280px 280px, 320px 320px, 400px 400px, 270px 270px, 380px 380px, 290px 290px, 360px 360px;
    z-index: -1;
    opacity: 0.6;
  }
  .hero h1 {
    font-family: 'Satoshi', sans-serif;
    font-weight: 700;
    font-size: clamp(48px, 8vw, 116px);
    line-height: 0.98;
    letter-spacing: -0.035em;
    max-width: 1100px;
    color: var(--ink);
  }
  .hero h1 .italic {
    font-size: 1.05em;
    display: inline-block;
  }
  .hero-sub {
    margin-top: 40px;
    max-width: 640px;
    font-size: 18px;
    line-height: 1.55;
    color: var(--ink-soft);
    font-weight: 400;
  }
  .hero-cta {
    margin-top: 48px;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--accent);
    color: var(--ink);
    padding: 14px 24px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.18s ease;
  }
  .hero-cta:hover { background: #4040FF; transform: translateY(-1px); }
  .hero-meta {
    margin-top: 90px;
    display: flex;
    gap: 64px;
    flex-wrap: wrap;
    padding-top: 32px;
    border-top: 1px solid var(--rule-soft);
  }
  .meta-item .meta-label {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: var(--muted);
    margin-bottom: 8px;
    font-weight: 600;
  }
  .meta-item .meta-val {
    font-size: 14px;
    color: var(--ink);
    font-weight: 500;
  }

  /* ─────────── ACT SECTIONS ─────────── */
  .act {
    padding: 160px 40px;
    border-top: 1px solid var(--rule-soft);
    position: relative;
  }
  @media (max-width: 720px) {
    .act { padding: 100px 24px; }
  }

  .act-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 80px;
    max-width: 1320px;
    margin: 0 auto;
  }
  @media (min-width: 1000px) {
    .act-grid {
      grid-template-columns: 5fr 7fr;
      gap: 100px;
      align-items: start;
    }
  }

  .act-headline {
    font-family: 'Satoshi', sans-serif;
    font-weight: 700;
    font-size: clamp(40px, 5.4vw, 78px);
    line-height: 1;
    letter-spacing: -0.03em;
    margin-bottom: 32px;
    color: var(--ink);
  }

  .act-lead {
    font-size: 18px;
    line-height: 1.55;
    color: var(--ink-soft);
    max-width: 480px;
  }

  .act-figure { position: relative; }
  .act-figure-frame {
    background: var(--bg-card);
    border: 1px solid var(--rule);
    border-radius: 12px;
    padding: 36px;
    transition: transform 0.4s cubic-bezier(0.2,0.7,0.2,1), box-shadow 0.4s ease;
    position: relative;
    overflow: hidden;
  }
  .act-figure-frame::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(92,92,255,0.08), transparent 70%);
    pointer-events: none;
  }
  .act-figure-frame:hover {
    transform: translateY(-4px);
    box-shadow: 0 24px 60px -20px var(--accent-glow);
  }
  .act-figure img {
    width: 100%;
    height: auto;
    display: block;
    filter: invert(1) hue-rotate(180deg);
    opacity: 0.92;
    position: relative;
    z-index: 1;
  }
  .act-caption {
    margin-top: 18px;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: var(--muted);
    font-weight: 600;
    display: flex;
    justify-content: space-between;
  }

  /* Body content */
  .act-body {
    margin-top: 100px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 64px;
  }
  @media (min-width: 1000px) {
    .act-body { grid-template-columns: 1fr 1fr; gap: 80px; }
  }

  .act-body p {
    font-size: 16px;
    line-height: 1.7;
    color: var(--ink-soft);
    margin-bottom: 22px;
  }
  .act-body p:last-child { margin-bottom: 0; }
  .act-body strong { color: var(--ink); font-weight: 700; }
  .act-body em {
    font-family: 'Satoshi', sans-serif;
    font-style: italic;
    font-weight: 700;
    color: var(--accent);
    font-size: 1em;
  }

  /* Pull quote */
  .pull {
    border-left: 2px solid var(--accent);
    padding: 6px 0 6px 24px;
    margin: 36px 0;
    font-family: 'Satoshi', sans-serif;
    font-style: italic;
    font-weight: 700;
    font-size: 24px;
    line-height: 1.3;
    color: var(--ink);
    letter-spacing: -0.015em;
  }
  .pull-attr {
    display: block;
    margin-top: 14px;
    font-style: normal;
    font-weight: 600;
    font-size: 11px;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.16em;
    font-family: 'JetBrains Mono', monospace;
  }

  /* Numbered key points */
  .keypoints {
    margin-top: 40px;
    display: grid;
    gap: 0;
    border-top: 1px solid var(--rule);
  }
  .kp {
    display: grid;
    grid-template-columns: 64px 1fr;
    gap: 20px;
    padding: 22px 0;
    border-bottom: 1px solid var(--rule-soft);
    align-items: baseline;
  }
  .kp:last-child { border-bottom: 1px solid var(--rule); }
  .kp-num {
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    font-weight: 500;
    color: var(--accent);
    letter-spacing: 0.05em;
  }
  .kp-text {
    font-size: 15px;
    line-height: 1.6;
    color: var(--ink-soft);
  }
  .kp-text strong { color: var(--ink); font-weight: 700; }

  /* Stat row */
  .stats {
    margin-top: 64px;
    padding: 36px 0;
    border-top: 1px solid var(--rule);
    border-bottom: 1px solid var(--rule);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 36px;
  }
  .stat .stat-num {
    font-family: 'Satoshi', sans-serif;
    font-weight: 700;
    font-size: 44px;
    line-height: 1;
    letter-spacing: -0.025em;
    margin-bottom: 10px;
    color: var(--ink);
  }
  .stat .stat-num .italic {
    font-size: 0.7em;
    margin-left: 2px;
  }
  .stat .stat-label {
    font-size: 13px;
    color: var(--muted);
    line-height: 1.5;
  }

  /* ─────────── PRINCIPLES ─────────── */
  .principles {
    padding: 180px 40px 160px;
    background: var(--bg);
    border-top: 1px solid var(--rule-soft);
    position: relative;
    overflow: hidden;
  }
  .principles::before {
    content: "";
    position: absolute;
    top: 0; left: 50%;
    transform: translateX(-50%);
    width: 800px; height: 400px;
    background: radial-gradient(ellipse 50% 50% at 50% 0%, rgba(92,92,255,0.10), transparent 70%);
    pointer-events: none;
  }
  .principles-inner { max-width: 1320px; margin: 0 auto; position: relative; }
  .principles h2 {
    font-family: 'Satoshi', sans-serif;
    font-weight: 700;
    font-size: clamp(40px, 5.2vw, 76px);
    line-height: 1;
    letter-spacing: -0.03em;
    margin-bottom: 80px;
    max-width: 900px;
    color: var(--ink);
  }

  .principle-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0;
    border-top: 1px solid var(--rule);
  }
  @media (min-width: 800px) {
    .principle-grid {
      grid-template-columns: repeat(2, 1fr);
      border-left: 1px solid var(--rule);
    }
  }

  .principle {
    padding: 48px 36px 48px 0;
    border-bottom: 1px solid var(--rule);
    transition: background 0.3s ease;
  }
  @media (min-width: 800px) {
    .principle {
      border-right: 1px solid var(--rule);
      padding: 48px 40px;
    }
  }
  .principle:hover { background: var(--bg-card); }
  .principle-num {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    color: var(--accent);
    margin-bottom: 24px;
    letter-spacing: 0.12em;
    font-weight: 500;
  }
  .principle h3 {
    font-family: 'Satoshi', sans-serif;
    font-weight: 700;
    font-size: 28px;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-bottom: 18px;
    max-width: 380px;
    color: var(--ink);
  }
  .principle h3 .italic { font-size: 1.04em; }
  .principle p {
    font-size: 15px;
    line-height: 1.65;
    color: var(--ink-soft);
    max-width: 380px;
  }

  /* ─────────── CONTRAST TABLE ─────────── */
  .contrast {
    padding: 160px 40px;
    border-top: 1px solid var(--rule-soft);
    background: var(--bg-deep);
  }
  .contrast-inner { max-width: 1320px; margin: 0 auto; }
  .contrast h2 {
    font-family: 'Satoshi', sans-serif;
    font-weight: 700;
    font-size: clamp(36px, 4.8vw, 64px);
    line-height: 1;
    letter-spacing: -0.03em;
    margin-bottom: 64px;
    max-width: 900px;
    color: var(--ink);
  }

  .ctable {
    display: grid;
    grid-template-columns: 1fr;
    border: 1px solid var(--rule);
    border-radius: 12px;
    overflow: hidden;
    background: var(--bg-card);
  }
  @media (min-width: 800px) {
    .ctable { grid-template-columns: 1fr 1fr; }
  }
  .ctable-col { padding: 32px 0; }
  @media (min-width: 800px) {
    .ctable-col { padding: 36px 40px; }
    .ctable-col + .ctable-col { border-left: 1px solid var(--rule); }
  }
  @media (max-width: 800px) {
    .ctable-col { padding: 28px 24px; }
    .ctable-col + .ctable-col { border-top: 1px solid var(--rule); }
  }
  .ctable-head {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--muted);
    margin-bottom: 28px;
    font-weight: 500;
  }
  .ctable-head.bad {
    color: var(--muted);
    text-decoration: line-through;
    text-decoration-thickness: 1px;
    text-decoration-color: var(--muted-soft);
  }
  .ctable-head.good { color: var(--accent); font-weight: 600; }
  .ctable ul { list-style: none; }
  .ctable li {
    padding: 16px 0;
    border-bottom: 1px solid var(--rule-soft);
    font-size: 15px;
    line-height: 1.55;
    color: var(--ink-soft);
    display: flex;
    gap: 12px;
  }
  .ctable li:last-child { border-bottom: none; }
  .ctable-col.bad-col li::before {
    content: "✕";
    color: var(--muted);
    flex-shrink: 0;
    font-size: 14px;
  }
  .ctable-col.good-col li::before {
    content: "→";
    color: var(--accent);
    flex-shrink: 0;
    font-weight: 600;
  }
  .ctable li strong { color: var(--ink); font-weight: 700; }

  /* ─────────── CLOSING ─────────── */
  .closing {
    padding: 200px 40px 200px;
    background: var(--bg-deep);
    color: var(--ink);
    border-top: 1px solid var(--rule-soft);
    position: relative;
    overflow: hidden;
  }
  .closing::before {
    content: "";
    position: absolute;
    bottom: -200px; right: -200px;
    width: 700px; height: 700px;
    background: radial-gradient(circle, rgba(92,92,255,0.20), transparent 60%);
    pointer-events: none;
  }
  .closing::after {
    content: "";
    position: absolute;
    top: -100px; left: -100px;
    width: 500px; height: 500px;
    background: radial-gradient(circle, rgba(92,92,255,0.10), transparent 60%);
    pointer-events: none;
  }
  .closing-inner { max-width: 1320px; margin: 0 auto; position: relative; }
  .closing h2 {
    font-family: 'Satoshi', sans-serif;
    font-weight: 700;
    font-size: clamp(48px, 7.5vw, 116px);
    line-height: 0.96;
    letter-spacing: -0.035em;
    max-width: 1200px;
    color: var(--ink);
  }
  .closing h2 .italic { font-size: 1.05em; }
  .closing-sub {
    margin-top: 56px;
    max-width: 640px;
    font-size: 19px;
    line-height: 1.55;
    color: var(--ink-soft);
  }
  .closing-cta {
    margin-top: 56px;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--accent);
    color: var(--ink);
    padding: 16px 28px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.18s ease;
  }
  .closing-cta:hover { background: #4040FF; transform: translateY(-1px); }
  .closing-tag {
    margin-top: 100px;
    padding-top: 32px;
    border-top: 1px solid var(--rule-soft);
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 24px;
    font-size: 13px;
    color: var(--muted);
    font-weight: 500;
  }
  .closing-tag .italic {
    font-size: 22px;
    color: var(--accent);
  }

  /* ─────────── REVEAL ANIMATION ─────────── */
  .reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.9s cubic-bezier(0.2,0.7,0.2,1), transform 0.9s cubic-bezier(0.2,0.7,0.2,1);
  }
  .reveal.in { opacity: 1; transform: translateY(0); }
  .reveal.delay-1 { transition-delay: 0.08s; }
  .reveal.delay-2 { transition-delay: 0.16s; }
  .reveal.delay-3 { transition-delay: 0.24s; }
  .reveal.delay-4 { transition-delay: 0.32s; }

  /* Section index marker */
  .section-marker {
    position: absolute;
    top: 48px;
    right: 40px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--muted);
    letter-spacing: 0.08em;
  }
  @media (max-width: 720px) {
    .section-marker { display: none; }
  }