:root {
    /* Palette: warm cream + ink + indigo + amber */
    --bg: #f3ede2;
    --bg-2: #ece4d4;
    --ink: #1a1f2e;
    --ink-soft: #2a3142;
    --muted: #6b6356;
    --line: #d8cdb8;
    --paper: #faf6ee;
    --indigo: #3a4cd6;
    --indigo-deep: #2535a8;
    --indigo-glow: rgba(58, 76, 214, 0.35);
    --amber: #c8862a;
    --amber-soft: #e2a948;
    --crimson: #b54338;
    --green: #4a7c3f;

    --section-pad-x: clamp(24px, 6vw, 96px);
    --section-pad-y: clamp(40px, 6vh, 80px);

    --t-display: 'DM Serif Display', Georgia, serif;
    --t-body: 'DM Sans', -apple-system, system-ui, sans-serif;
    --t-mono: 'JetBrains Mono', ui-monospace, monospace;
  }

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

  html, body {
    background: var(--bg);
    color: var(--ink);
    font-family: var(--t-body);
    font-size: 16px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    background-color: var(--bg);
    background-image:
      linear-gradient(180deg,
        #f3ede2 0%,
        #f0e8d9 20%,
        #ece4d4 50%,
        #efe7d8 75%,
        #ebe2cf 100%);
    position: relative;
  }

  /* ---------- Drifting parallax blobs (fixed layer, content scrolls past) ---------- */
  #bgBlobs {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
  }
  #bgBlobs .blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(90px);
    will-change: transform;
    transition: transform 0.05s linear;
  }
  #bgBlobs .blob.b1 { width: 60vw; height: 60vw; top:  -10%; left: -10%; background: radial-gradient(circle, rgba(58,76,214,0.10), transparent 70%); }
  #bgBlobs .blob.b2 { width: 55vw; height: 55vw; top:  20%; right: -15%; background: radial-gradient(circle, rgba(200,134,42,0.11), transparent 70%); }
  #bgBlobs .blob.b3 { width: 70vw; height: 70vw; top:  60%; left: -20%; background: radial-gradient(circle, rgba(58,76,214,0.09), transparent 70%); }
  #bgBlobs .blob.b4 { width: 50vw; height: 50vw; top:  90%; right: -10%; background: radial-gradient(circle, rgba(181,67,56,0.06), transparent 70%); }
  #bgBlobs .blob.b5 { width: 45vw; height: 45vw; top: 130%; left:  20%; background: radial-gradient(circle, rgba(200,134,42,0.10), transparent 70%); }
  #bgBlobs .blob.b6 { width: 55vw; height: 55vw; top: 170%; right:  -5%; background: radial-gradient(circle, rgba(58,76,214,0.11), transparent 70%); }
  #bgBlobs .blob.b7 { width: 65vw; height: 65vw; top: 210%; left: -15%; background: radial-gradient(circle, rgba(200,134,42,0.10), transparent 70%); }
  #bgBlobs .blob.b8 { width: 50vw; height: 50vw; top: 260%; left:  30%; background: radial-gradient(circle, rgba(58,76,214,0.09), transparent 70%); }

  /* Drifting glyph layer — large symbols that float at different scroll speeds */
  #bgDrift {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
  }
  #bgDrift .gly {
    position: absolute;
    font-family: var(--t-display);
    color: var(--ink);
    opacity: 0.025;
    user-select: none;
    will-change: transform;
    line-height: 0.9;
    white-space: nowrap;
  }
  #bgDrift .ring {
    position: absolute;
    border: 1px solid var(--ink);
    border-radius: 50%;
    opacity: 0.045;
    will-change: transform;
  }
  #bgDrift .square {
    position: absolute;
    border: 1px solid var(--amber);
    opacity: 0.10;
    will-change: transform;
  }
  #bgDrift .dot {
    position: absolute;
    background: var(--indigo);
    border-radius: 50%;
    opacity: 0.22;
    will-change: transform;
    box-shadow: 0 0 12px rgba(58,76,214,0.25);
  }

  /* ---------- Global background animation canvas ---------- */
  #bgFx {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    opacity: 0.35;
  }
  .section { position: relative; z-index: 1; }

  /* ---------- Floating decorative shapes ---------- */
  .floaters {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
    z-index: 0;
  }
  .floater {
    position: absolute;
    opacity: 0.5;
    will-change: transform;
  }
  @keyframes floatA {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33%      { transform: translate(20px, -28px) rotate(7deg); }
    66%      { transform: translate(-14px, 22px) rotate(-5deg); }
  }
  @keyframes floatB {
    0%, 100% { transform: translate(0, 0) rotate(45deg); }
    50%      { transform: translate(-18px, -32px) rotate(60deg); }
  }
  @keyframes floatC {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50%      { transform: translate(12px, -16px) scale(1.08); }
  }
  @keyframes spinSlow {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
  }
  @keyframes drift {
    0%   { transform: translate3d(-10%, 0, 0); }
    100% { transform: translate3d(110%, 0, 0); }
  }
  @keyframes meshPulse {
    0%, 100% { opacity: 0.6; transform: scale(1); }
    50%      { opacity: 0.9; transform: scale(1.04); }
  }
  @keyframes wireDash {
    to { stroke-dashoffset: -200; }
  }
  @keyframes shimmer {
    0%   { background-position: -200% 0; }
    100% { background-position: 200% 0; }
  }
  @keyframes blink {
    0%, 49% { opacity: 1; }
    50%, 100% { opacity: 0; }
  }
  @keyframes fadeInOut {
    0%, 100% { opacity: 0.15; }
    50%      { opacity: 0.55; }
  }

  /* ---------- Progress bar ---------- */
  .progress {
    position: fixed;
    top: 0; left: 0;
    height: 3px;
    width: 0%;
    background: linear-gradient(90deg, var(--indigo) 0%, var(--amber-soft) 100%);
    box-shadow: 0 0 12px var(--indigo-glow), 0 0 4px var(--indigo);
    z-index: 1000;
    transition: width 0.12s ease-out;
  }

  /* ---------- Dot navigation ---------- */
  .dotnav {
    position: fixed;
    right: clamp(16px, 2.5vw, 32px);
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 14px;
    z-index: 900;
  }
  .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: 1.5px solid var(--ink);
    background: transparent;
    cursor: pointer;
    position: relative;
    transition: all 0.25s ease;
    padding: 0;
  }
  .dot:hover { background: var(--amber); border-color: var(--amber); }
  .dot.active {
    background: var(--ink);
    transform: scale(1.25);
  }
  .dot::after {
    content: attr(data-label);
    position: absolute;
    right: calc(100% + 14px);
    top: 50%;
    transform: translateY(-50%) translateX(6px);
    background: var(--ink);
    color: var(--paper);
    padding: 6px 10px;
    border-radius: 4px;
    font-family: var(--t-body);
    font-size: 12px;
    font-weight: 500;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
    letter-spacing: 0.01em;
  }
  .dot:hover::after {
    opacity: 1;
    transform: translateY(-50%) translateX(0);
  }

  /* ---------- Section base ---------- */
  .section {
    min-height: 100svh;
    width: 100%;
    padding: var(--section-pad-y) var(--section-pad-x);
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
  }
  /* Soft gradient bridges blend each section into the next — no hard edges */
  .section + .section::before {
    content: '';
    position: absolute;
    top: -120px; left: 0; right: 0;
    height: 200px;
    background: linear-gradient(180deg, transparent 0%, rgba(243,237,226,0) 0%, rgba(243,237,226,0.0) 50%, transparent 100%);
    pointer-events: none;
    z-index: 0;
  }
  /* Faint vertical spine that threads all sections together */
  .spine {
    position: fixed;
    left: clamp(20px, 4vw, 56px);
    top: 0; bottom: 0;
    width: 1px;
    background: linear-gradient(180deg, transparent 0%, var(--line) 8%, var(--line) 92%, transparent 100%);
    opacity: 0.6;
    z-index: 2;
    pointer-events: none;
  }
  .spine::before {
    content: '';
    position: absolute;
    left: -3px; top: 0;
    width: 7px; height: 7px;
    border-radius: 50%;
    background: var(--indigo);
    box-shadow: 0 0 12px var(--indigo-glow);
  }
  .spine-marker {
    position: fixed;
    left: clamp(20px, 4vw, 56px);
    top: 50%;
    width: 9px; height: 9px;
    margin-left: -4px;
    margin-top: -4px;
    border-radius: 50%;
    background: var(--amber);
    box-shadow: 0 0 14px rgba(200,134,42,0.6);
    z-index: 3;
    pointer-events: none;
    transition: transform 0.15s ease-out;
  }

  .section-num {
    position: absolute;
    top: clamp(28px, 5vh, 48px);
    left: var(--section-pad-x);
    font-family: var(--t-mono);
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.18em;
    color: var(--muted);
    text-transform: uppercase;
  }
  .section-num::before {
    content: '';
    display: inline-block;
    width: 24px;
    height: 1px;
    background: var(--muted);
    vertical-align: middle;
    margin-right: 12px;
    margin-bottom: 3px;
  }

  /* ---------- Reveal system ---------- */
  .reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.9s cubic-bezier(.2,.7,.2,1), transform 0.9s cubic-bezier(.2,.7,.2,1);
  }
  .reveal.in {
    opacity: 1;
    transform: translateY(0);
  }

  /* ---------- Section 1: Hero ---------- */
  #s1 {
    overflow: hidden;
  }
  #s1 .mesh {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 0;
  }
  #s1 .mesh::before, #s1 .mesh::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    animation: meshPulse 8s ease-in-out infinite;
  }
  #s1 .mesh::before {
    width: 50vw; height: 50vw;
    top: -10vh; right: -10vw;
    background: radial-gradient(circle, rgba(58,76,214,0.12), transparent 70%);
  }
  #s1 .mesh::after {
    width: 45vw; height: 45vw;
    bottom: -15vh; left: -10vw;
    background: radial-gradient(circle, rgba(200,134,42,0.11), transparent 70%);
    animation-delay: -4s;
  }
  #s1 .grid-bg {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
      linear-gradient(var(--line) 1px, transparent 1px),
      linear-gradient(90deg, var(--line) 1px, transparent 1px);
    background-size: 80px 80px;
    opacity: 0.10;
    pointer-events: none;
    mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, black, transparent 100%);
    -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, black, transparent 100%);
    z-index: 0;
    animation: meshPulse 14s ease-in-out infinite;
  }
  #s1 .hero-shape {
    position: absolute;
    pointer-events: none;
    z-index: 0;
  }
  #s1 .hero-shape.s1 {
    width: 220px; height: 220px;
    top: 12%; right: 8%;
    border: 1.5px solid var(--indigo);
    border-radius: 50%;
    opacity: 0.18;
    animation: floatC 9s ease-in-out infinite;
  }
  #s1 .hero-shape.s1::after {
    content: ''; position: absolute; inset: 24px;
    border: 1px dashed var(--indigo); border-radius: 50%;
    animation: spinSlow 32s linear infinite;
  }
  #s1 .hero-shape.s2 {
    width: 130px; height: 130px;
    bottom: 16%; right: 22%;
    background: var(--amber);
    opacity: 0.10;
    transform: rotate(45deg);
    animation: floatB 11s ease-in-out infinite;
  }
  #s1 .hero-shape.s3 {
    width: 80px; height: 80px;
    top: 22%; left: 6%;
    border: 1.5px solid var(--ink);
    opacity: 0.22;
    animation: floatA 10s ease-in-out infinite;
  }
  #s1 .hero-shape.s4 {
    width: 14px; height: 14px;
    bottom: 28%; left: 12%;
    background: var(--indigo);
    border-radius: 50%;
    box-shadow: 0 0 24px rgba(58,76,214,0.25);
    opacity: 0.65;
    animation: floatA 6s ease-in-out infinite;
  }
  #s1 .ticker {
    position: absolute;
    bottom: 24px;
    left: 0; right: 0;
    overflow: hidden;
    height: 22px;
    pointer-events: none;
    z-index: 0;
    opacity: 0.12;
  }
  #s1 .ticker-track {
    position: absolute;
    white-space: nowrap;
    font-family: var(--t-mono);
    font-size: 11px;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--ink);
    animation: drift 60s linear infinite;
  }
  #s1 .ticker-track span {
    margin-right: 48px;
  }
  .blink {
    display: inline-block;
    width: 0.5ch;
    background: var(--indigo);
    animation: blink 1s steps(1) infinite;
    height: 0.85em;
    vertical-align: -2px;
    margin-left: 6px;
  }
  .hero-wrap {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    position: relative;
    z-index: 2;
  }
  .eyebrow {
    font-family: var(--t-mono);
    font-size: clamp(12px, 1.05vw, 14px);
    font-weight: 500;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--indigo);
    margin-bottom: 32px;
    display: inline-flex;
    align-items: center;
    gap: 12px;
  }
  .eyebrow::before {
    content: '';
    width: 32px;
    height: 1.5px;
    background: var(--indigo);
  }
  .hero-title {
    font-family: var(--t-display);
    font-weight: 400;
    font-size: clamp(56px, 11vw, 180px);
    line-height: 0.92;
    letter-spacing: -0.02em;
    color: var(--ink);
    margin-bottom: clamp(20px, 3vh, 36px);
  }
  .hero-title em {
    font-style: italic;
    color: var(--indigo);
  }
  .hero-sub {
    font-family: var(--t-body);
    font-weight: 300;
    font-size: clamp(20px, 2.6vw, 36px);
    line-height: 1.3;
    color: var(--ink-soft);
    max-width: 780px;
    letter-spacing: -0.01em;
  }
  .hero-sub strong {
    font-weight: 600;
    color: var(--ink);
    background: linear-gradient(transparent 60%, rgba(226,169,72,0.4) 60%);
    padding: 0 4px;
  }
  .hero-meta {
    margin-top: clamp(40px, 6vh, 72px);
    display: flex;
    gap: clamp(24px, 4vw, 56px);
    flex-wrap: wrap;
    font-family: var(--t-mono);
    font-size: 12px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--muted);
  }
  .hero-meta span strong {
    display: block;
    font-family: var(--t-body);
    font-weight: 600;
    font-size: 15px;
    color: var(--ink);
    text-transform: none;
    letter-spacing: 0;
    margin-top: 4px;
  }

  /* ---------- Section 2: Pure Functions ---------- */
  #s2 { background: transparent; position: relative; }
  #s2::before {
    content: '';
    position: absolute;
    width: 320px; height: 320px;
    top: 8%; right: -80px;
    border: 1px solid var(--line);
    border-radius: 50%;
    opacity: 0.25;
    pointer-events: none;
    z-index: 0;
    animation: floatC 14s ease-in-out infinite;
  }
  #s2::after {
    content: '';
    position: absolute;
    width: 140px; height: 140px;
    bottom: 10%; left: -40px;
    border: 1px dashed var(--amber);
    transform: rotate(45deg);
    opacity: 0.18;
    pointer-events: none;
    z-index: 0;
    animation: floatB 18s ease-in-out infinite;
  }
  .s2-grid {
    max-width: 1280px;
    margin: 0 auto;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr;
    gap: clamp(24px, 4vh, 48px);
  }
  .h-eyebrow {
    font-family: var(--t-mono);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--indigo);
    display: flex;
    align-items: center;
    gap: 12px;
  }
  .h-eyebrow::before {
    content: '§';
    font-family: var(--t-display);
    font-size: 18px;
    color: var(--amber);
  }
  .section-title {
    font-family: var(--t-display);
    font-weight: 400;
    font-size: clamp(40px, 6vw, 84px);
    line-height: 1.0;
    letter-spacing: -0.015em;
    color: var(--ink);
    max-width: 1100px;
  }
  .section-title em {
    font-style: italic;
    color: var(--indigo);
  }
  .section-lead {
    font-size: clamp(19px, 1.75vw, 25px);
    line-height: 1.55;
    color: var(--ink-soft);
    max-width: 820px;
    font-weight: 400;
  }

  .compare {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(16px, 2vw, 28px);
    margin-top: 8px;
  }
  .compare-card {
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: clamp(20px, 2.4vw, 32px);
    position: relative;
    overflow: hidden;
  }
  .compare-card.bad { border-color: rgba(181,67,56,0.3); }
  .compare-card.good { border-color: rgba(58,76,214,0.3); }
  .compare-card .tag {
    font-family: var(--t-mono);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    margin-bottom: 14px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
  }
  .compare-card.bad .tag { color: var(--crimson); }
  .compare-card.good .tag { color: var(--indigo); }
  .compare-card h3 {
    font-family: var(--t-display);
    font-weight: 400;
    font-size: clamp(22px, 2.2vw, 30px);
    margin-bottom: 12px;
    color: var(--ink);
    line-height: 1.1;
  }
  .compare-card p {
    color: var(--ink-soft);
    font-size: clamp(16px, 1.15vw, 18px);
    line-height: 1.55;
  }
  /* Visual representation of the pattern */
  .obj-vis {
    margin-top: 22px;
    padding: 18px;
    border: 1px dashed var(--line);
    border-radius: 4px;
    font-family: var(--t-mono);
    font-size: 12px;
    color: var(--muted);
    position: relative;
    background:
      repeating-linear-gradient(
        45deg,
        transparent 0 8px,
        rgba(181,67,56,0.04) 8px 9px
      );
  }
  .obj-vis .label {
    color: var(--crimson);
    font-weight: 600;
    margin-bottom: 6px;
    display: block;
  }
  .obj-vis .warn {
    position: absolute;
    top: 12px; right: 12px;
    width: 22px; height: 22px;
    border-radius: 50%;
    background: var(--crimson);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
  }
  .pure-vis {
    margin-top: 22px;
    padding: 18px;
    border: 1px solid var(--indigo);
    border-radius: 4px;
    background: rgba(58,76,214,0.04);
    display: flex;
    align-items: center;
    gap: 14px;
    font-family: var(--t-mono);
    font-size: 12px;
  }
  .pure-vis .pill {
    padding: 6px 12px;
    border-radius: 99px;
    background: var(--paper);
    border: 1px solid var(--line);
    color: var(--ink);
    font-weight: 500;
  }
  .pure-vis .arrow {
    flex: 1;
    height: 1.5px;
    background: linear-gradient(90deg, transparent, var(--indigo) 40%, var(--indigo) 60%, transparent);
    background-size: 200% 100%;
    position: relative;
    animation: shimmer 2.4s linear infinite;
  }
  .pure-vis .arrow::after {
    content: '';
    position: absolute;
    right: -1px; top: 50%;
    transform: translateY(-50%);
    border: 5px solid transparent;
    border-left-color: var(--indigo);
  }
  .pure-vis .arrow::before {
    content: '';
    position: absolute;
    width: 6px; height: 6px;
    background: var(--amber);
    border-radius: 50%;
    top: 50%;
    transform: translateY(-50%);
    box-shadow: 0 0 10px var(--amber);
    animation: travel 2.4s linear infinite;
  }
  @keyframes travel {
    0%   { left: 0%; opacity: 0; }
    10%  { opacity: 1; }
    90%  { opacity: 1; }
    100% { left: 100%; opacity: 0; }
  }
  .pure-vis .box {
    padding: 8px 16px;
    background: var(--indigo);
    color: var(--paper);
    border-radius: 4px;
    font-weight: 600;
    letter-spacing: 0.04em;
  }

  /* Quote */
  .quote {
    border-left: 3px solid var(--amber);
    padding: clamp(16px, 2vw, 24px) clamp(20px, 3vw, 36px);
    background: linear-gradient(90deg, rgba(200,134,42,0.05), transparent 60%);
    margin: 0;
  }
  .quote p {
    font-family: var(--t-display);
    font-style: italic;
    font-size: clamp(20px, 2.4vw, 32px);
    line-height: 1.3;
    color: var(--ink);
    letter-spacing: -0.01em;
  }
  .quote cite {
    display: block;
    margin-top: 12px;
    font-family: var(--t-mono);
    font-size: 11px;
    font-style: normal;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: var(--muted);
  }

  /* ---------- Code Terminal Card — Cream / Sand ---------- */
  .terminal {
    background: var(--paper);
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--line);
    box-shadow: 0 8px 28px -10px rgba(26,31,46,0.10), 0 2px 8px rgba(26,31,46,0.04);
    font-family: var(--t-mono);
  }
  .terminal-bar {
    background: var(--bg-2);
    padding: 10px 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid var(--line);
  }
  .traffic {
    width: 10px; height: 10px;
    border-radius: 50%;
  }
  .traffic.r { background: var(--crimson); opacity: 0.65; }
  .traffic.y { background: var(--amber);   opacity: 0.75; }
  .traffic.g { background: var(--green);   opacity: 0.7; }
  .terminal-title {
    margin-left: 12px;
    font-size: 11px;
    color: var(--muted);
    letter-spacing: 0.04em;
    font-family: var(--t-mono);
  }
  .terminal-body {
    padding: 20px clamp(18px, 2.4vw, 28px);
    font-size: clamp(13px, 1.05vw, 15px);
    line-height: 1.7;
    color: var(--ink);
    overflow-x: auto;
  }
  .terminal-body pre {
    font-family: var(--t-mono);
    white-space: pre;
  }
  .tk-kw   { color: var(--indigo-deep); font-weight: 500; }
  .tk-fn   { color: var(--indigo);      font-weight: 500; }
  .tk-str  { color: var(--green); }
  .tk-cm   { color: var(--muted);       font-style: italic; }
  .tk-num  { color: var(--amber); }
  .tk-op   { color: var(--indigo); }
  .tk-self { color: var(--crimson); }
  .tk-ok   { color: var(--green);       font-weight: 600; }
  .tk-bad  { color: var(--crimson);     font-weight: 600; }

  /* ---------- Section 3: PRNG ---------- */
  #s3 {
    background: transparent;
    position: relative;
  }
  .s3-grid {
    max-width: 1320px;
    margin: 0 auto;
    width: 100%;
    display: grid;
    gap: clamp(24px, 4vh, 40px);
  }
  .prng-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(20px, 3vw, 40px);
    align-items: stretch;
  }
  .panel {
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: clamp(22px, 2.6vw, 36px);
    display: flex;
    flex-direction: column;
    gap: 18px;
  }
  .panel-head {
    display: flex;
    align-items: baseline;
    gap: 12px;
    border-bottom: 1px solid var(--line);
    padding-bottom: 14px;
  }
  .panel-head .num {
    font-family: var(--t-display);
    font-size: 32px;
    line-height: 1;
    color: var(--amber);
  }
  .panel-head h3 {
    font-family: var(--t-display);
    font-size: clamp(22px, 2vw, 28px);
    font-weight: 400;
    line-height: 1.1;
    flex: 1;
  }
  .panel-head .badge {
    font-family: var(--t-mono);
    font-size: 10px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    padding: 4px 10px;
    border-radius: 99px;
  }
  .panel-head .badge.bad { background: rgba(181,67,56,0.1); color: var(--crimson); }
  .panel-head .badge.good { background: rgba(58,76,214,0.1); color: var(--indigo); }
  .panel p { color: var(--ink-soft); font-size: 17px; line-height: 1.6; }

  /* PRNG visuals */
  .prng-chaos {
    background: var(--bg);
    border-radius: 4px;
    padding: 18px;
    position: relative;
    height: 200px;
    overflow: hidden;
    border: 1px dashed var(--line);
  }
  .die {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 56px; height: 56px;
    background: var(--ink);
    color: var(--paper);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--t-mono);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.08em;
    z-index: 3;
  }
  .die::before {
    content: '';
    position: absolute;
    inset: -8px;
    border-radius: 12px;
    border: 1.5px solid var(--crimson);
    opacity: 0.4;
    animation: pulse 2s infinite ease-in-out;
  }
  .die::after {
    content: '';
    position: absolute;
    inset: -16px;
    border-radius: 16px;
    border: 1px dashed var(--crimson);
    opacity: 0.3;
    animation: spinSlow 12s linear infinite;
  }
  @keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.4; }
    50% { transform: scale(1.08); opacity: 0.15; }
  }
  .thread {
    position: absolute;
    top: 50%; left: 50%;
    height: 1.5px;
    background: linear-gradient(90deg, transparent, var(--crimson) 80%);
    transform-origin: 0 50%;
    opacity: 0.7;
    animation: fadeInOut 2.4s ease-in-out infinite;
  }
  .thread::before {
    content: '';
    position: absolute;
    width: 4px; height: 4px;
    border-radius: 50%;
    background: var(--crimson);
    box-shadow: 0 0 8px var(--crimson);
    top: 50%;
    transform: translateY(-50%);
    animation: dieTravel 1.8s ease-in-out infinite;
  }
  @keyframes dieTravel {
    0%   { right: 0%; opacity: 0; }
    20%  { opacity: 1; }
    80%  { opacity: 1; }
    100% { right: 90%; opacity: 0; }
  }
  .thread::after {
    content: 'GPU';
    position: absolute;
    right: -2px; top: -8px;
    font-family: var(--t-mono);
    font-size: 9px;
    color: var(--crimson);
    background: var(--bg);
    padding: 1px 4px;
    border-radius: 2px;
    letter-spacing: 0.08em;
  }
  .chaos-label {
    position: absolute;
    bottom: 10px; right: 12px;
    font-family: var(--t-mono);
    font-size: 10px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--crimson);
    z-index: 4;
  }

  /* Tree path animation */
  .prng-tree svg line { stroke-dasharray: 200; stroke-dashoffset: 0; }
  .prng-tree svg .grow1 { animation: growLine 1.6s ease-out forwards; }
  .prng-tree svg .grow2 { animation: growLine 1.6s ease-out 0.4s forwards; }
  .prng-tree svg .pulse-node { transform-origin: center; transform-box: fill-box; }
  .prng-tree svg .pulse-node circle { animation: pulseDot 2.5s ease-in-out infinite; }
  @keyframes growLine {
    from { stroke-dashoffset: 200; opacity: 0; }
    to   { stroke-dashoffset: 0; opacity: 1; }
  }
  @keyframes pulseDot {
    0%, 100% { transform: scale(1); }
    50%      { transform: scale(1.4); }
  }

  /* PRNG tree */
  .prng-tree {
    background: var(--bg);
    border-radius: 4px;
    padding: 22px 18px;
    border: 1px solid rgba(58,76,214,0.18);
    height: 200px;
    position: relative;
  }
  .prng-tree svg {
    width: 100%; height: 100%;
    display: block;
  }

  .big-statement {
    font-family: var(--t-display);
    font-size: clamp(40px, 7vw, 96px);
    line-height: 1.0;
    letter-spacing: -0.02em;
    color: var(--ink);
    text-align: center;
    margin: clamp(24px, 4vh, 48px) auto 0;
    max-width: 1200px;
  }
  .big-statement em {
    font-style: italic;
    color: var(--indigo);
  }
  .big-statement .punct {
    color: var(--amber);
    font-style: italic;
  }

  /* ---------- Section 4: Flax init/apply ---------- */
  #s4 { background: transparent; position: relative; overflow: hidden; }
  #s4::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
      repeating-linear-gradient(
        45deg,
        transparent 0 60px,
        rgba(58,76,214,0.04) 60px 61px
      );
    pointer-events: none;
  }
  #s4 .corner-glyph {
    position: absolute;
    font-family: var(--t-display);
    font-size: 280px;
    line-height: 1;
    color: var(--indigo);
    opacity: 0.022;
    pointer-events: none;
    user-select: none;
    z-index: 0;
  }
  #s4 .cg-1 { top: -40px; left: 4%; animation: floatA 16s ease-in-out infinite; }
  #s4 .cg-2 { bottom: -80px; right: 4%; animation: floatB 20s ease-in-out infinite; }
  .s4-wrap {
    max-width: 1320px;
    margin: 0 auto;
    width: 100%;
    display: grid;
    gap: clamp(24px, 4vh, 36px);
  }
  .flow-diagram {
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: clamp(28px, 3.5vw, 48px) clamp(24px, 3vw, 40px);
    position: relative;
    overflow: hidden;
  }
  .flow-row {
    display: grid;
    grid-template-columns: 1fr 80px 1fr;
    gap: clamp(16px, 2vw, 28px);
    align-items: stretch;
  }
  .flow-phase {
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: clamp(20px, 2.4vw, 28px);
    background: var(--bg);
    position: relative;
  }
  .flow-phase .phase-num {
    position: absolute;
    top: -14px; left: 20px;
    background: var(--ink);
    color: var(--paper);
    font-family: var(--t-mono);
    font-size: 10px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    padding: 4px 10px;
    border-radius: 99px;
    font-weight: 500;
  }
  .flow-phase h4 {
    font-family: var(--t-display);
    font-weight: 400;
    font-size: clamp(22px, 2.4vw, 32px);
    line-height: 1.05;
    margin-top: 8px;
    margin-bottom: 6px;
  }
  .flow-phase .phase-mono {
    font-family: var(--t-mono);
    font-size: 13px;
    color: var(--indigo);
    margin-bottom: 16px;
  }
  .flow-phase p {
    color: var(--ink-soft);
    font-size: 14px;
    line-height: 1.55;
    margin-bottom: 16px;
  }
  .flow-phase .vis {
    margin-top: auto;
    padding: 14px;
    border-radius: 4px;
    background: var(--paper);
    border: 1px dashed var(--line);
  }
  .flow-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 8px;
    color: var(--amber);
    position: relative;
  }
  .flow-arrow svg { width: 60px; height: 24px; }
  .flow-arrow .pkt {
    position: absolute;
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--amber);
    box-shadow: 0 0 10px var(--amber);
    top: 18px;
    animation: pktTravel 2.6s ease-in-out infinite;
  }
  @keyframes pktTravel {
    0%   { left: 0%; opacity: 0; }
    15%  { opacity: 1; }
    85%  { opacity: 1; }
    100% { left: 100%; opacity: 0; }
  }
  .flow-arrow span {
    font-family: var(--t-mono);
    font-size: 10px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--muted);
  }

  .params-vis {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
    font-family: var(--t-mono);
    font-size: 11px;
  }
  .params-vis .kv {
    background: var(--bg);
    padding: 6px 10px;
    border-radius: 3px;
    border: 1px solid var(--line);
  }
  .params-vis .kv b { color: var(--indigo); font-weight: 600; }
  .params-vis .kv span { color: var(--muted); }

  .apply-vis {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--t-mono);
    font-size: 12px;
  }
  .apply-vis .pill {
    background: var(--bg);
    border: 1px solid var(--line);
    padding: 6px 12px;
    border-radius: 4px;
  }
  .apply-vis .pill.params { background: rgba(58,76,214,0.08); border-color: var(--indigo); color: var(--indigo); font-weight: 500; }
  .apply-vis .pill.input { background: rgba(200,134,42,0.08); border-color: var(--amber); color: var(--amber); font-weight: 500; }
  .apply-vis .arrow {
    flex: 1; min-width: 16px;
    height: 1.5px;
    background: linear-gradient(90deg, transparent, var(--ink) 30%, var(--ink) 70%, transparent);
    background-size: 200% 100%;
    position: relative;
    animation: shimmer 2.6s linear infinite;
  }
  .apply-vis .arrow::after {
    content: '';
    position: absolute;
    right: -1px; top: 50%;
    transform: translateY(-50%);
    border: 5px solid transparent;
    border-left-color: var(--ink);
  }
  .apply-vis .out {
    background: var(--ink);
    color: var(--paper);
    padding: 6px 12px;
    border-radius: 4px;
    font-weight: 600;
  }

  /* Architecture layer */
  .arch-layers {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    border: 1px solid var(--line);
    border-radius: 6px;
    overflow: hidden;
    background: var(--paper);
  }
  .arch-layer {
    padding: clamp(16px, 2vw, 24px);
    position: relative;
  }
  .arch-layer:first-child {
    border-right: 1px dashed var(--line);
  }
  .arch-layer .lbl {
    font-family: var(--t-mono);
    font-size: 10px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 8px;
  }
  .arch-layer h5 {
    font-family: var(--t-display);
    font-size: clamp(18px, 1.6vw, 22px);
    font-weight: 400;
    margin-bottom: 6px;
  }
  .arch-layer .tag {
    display: inline-block;
    font-family: var(--t-mono);
    font-size: 10px;
    padding: 3px 8px;
    border-radius: 3px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-top: 8px;
    font-weight: 500;
  }
  .arch-layer .tag.stateless { background: rgba(58,76,214,0.1); color: var(--indigo); }
  .arch-layer .tag.stateful { background: rgba(200,134,42,0.12); color: var(--amber); }

  /* ---------- Section 5: Epic example ---------- */
  #s5 { background: transparent; position: relative; overflow: hidden; }
  #s5::before {
    content: '';
    position: absolute;
    width: 60vw; height: 60vw;
    bottom: -25vw; right: -20vw;
    background: radial-gradient(circle, rgba(200,134,42,0.10), transparent 65%);
    pointer-events: none;
    animation: meshPulse 12s ease-in-out infinite;
  }
  .s5-grid {
    max-width: 1380px;
    margin: 0 auto;
    width: 100%;
    display: grid;
    grid-template-columns: 1.15fr 1fr;
    gap: clamp(24px, 3vw, 40px);
    align-items: start;
  }
  .s5-side {
    display: flex;
    flex-direction: column;
    gap: 24px;
    position: sticky;
    top: 80px;
  }

  .gradient-canvas-wrap {
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 24px;
    position: relative;
  }
  .gradient-canvas-wrap h4 {
    font-family: var(--t-display);
    font-weight: 400;
    font-size: 22px;
    margin-bottom: 4px;
  }
  .gradient-canvas-wrap .sub {
    font-family: var(--t-mono);
    font-size: 11px;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 16px;
  }
  #gradCanvas {
    width: 100%;
    height: 240px;
    display: block;
    border-radius: 4px;
  }
  .step-readout {
    margin-top: 14px;
    display: flex;
    justify-content: space-between;
    font-family: var(--t-mono);
    font-size: 12px;
    color: var(--muted);
  }
  .step-readout span b {
    color: var(--ink);
    font-weight: 600;
    margin-left: 4px;
  }

  /* ---------- Section 6: Conclusion ---------- */
  #s6 {
    background: transparent;
    position: relative;
    overflow: hidden;
  }
  #s6::before {
    content: '';
    position: absolute;
    width: 600px; height: 600px;
    top: -200px; left: 50%;
    transform: translateX(-50%);
    background: radial-gradient(circle, rgba(58,76,214,0.10), transparent 60%);
    pointer-events: none;
    animation: meshPulse 10s ease-in-out infinite;
  }
  #s6 .deco-orbit {
    position: absolute;
    width: 480px; height: 480px;
    bottom: -240px; left: 50%;
    transform: translateX(-50%);
    border: 1px dashed var(--line);
    border-radius: 50%;
    pointer-events: none;
    animation: spinSlow 60s linear infinite;
  }
  #s6 .deco-orbit::after {
    content: '';
    position: absolute;
    width: 12px; height: 12px;
    background: var(--indigo);
    border-radius: 50%;
    top: 0; left: 50%;
    transform: translateX(-50%);
    box-shadow: 0 0 16px var(--indigo-glow);
  }
  .takeaway-grid {
    max-width: 1320px;
    margin: 0 auto;
    width: 100%;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: clamp(16px, 2vw, 28px);
  }
  .takeaway {
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: clamp(24px, 2.6vw, 36px);
    display: flex;
    flex-direction: column;
    gap: 14px;
    position: relative;
    overflow: hidden;
  }
  .takeaway::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--accent);
  }
  .takeaway:nth-child(1) { --accent: var(--indigo); }
  .takeaway:nth-child(2) { --accent: var(--amber); }
  .takeaway:nth-child(3) { --accent: var(--ink); }
  .takeaway { transition: transform 0.4s cubic-bezier(.2,.7,.2,1), box-shadow 0.4s; }
  .takeaway:hover {
    transform: translateY(-6px);
    box-shadow: 0 18px 40px -16px rgba(26,31,46,0.18);
  }
  .takeaway .glyph { transition: transform 0.5s cubic-bezier(.2,.7,.2,1); }
  .takeaway:hover .glyph { transform: rotate(8deg) scale(1.08); }
  .takeaway .glyph {
    width: 48px; height: 48px;
    border-radius: 8px;
    background: var(--accent);
    color: var(--paper);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--t-display);
    font-size: 22px;
    font-weight: 400;
  }
  .takeaway h4 {
    font-family: var(--t-display);
    font-size: clamp(22px, 2.2vw, 28px);
    line-height: 1.1;
    font-weight: 400;
  }
  .takeaway p {
    color: var(--ink-soft);
    font-size: 17px;
    line-height: 1.6;
  }
  .takeaway .num {
    position: absolute;
    top: 24px; right: 24px;
    font-family: var(--t-display);
    font-size: 56px;
    color: var(--line);
    line-height: 1;
  }

  .closing {
    margin-top: clamp(40px, 6vh, 80px);
    text-align: center;
    max-width: 1180px;
    margin-left: auto;
    margin-right: auto;
  }
  .closing-text {
    font-family: var(--t-display);
    font-size: clamp(36px, 6.5vw, 88px);
    line-height: 1.05;
    letter-spacing: -0.02em;
    color: var(--ink);
  }
  .closing-text em {
    font-style: italic;
    color: var(--indigo);
  }
  .closing-text .accent { color: var(--amber); font-style: italic; }

  .pdf-cta {
    margin-top: clamp(32px, 4vh, 56px);
    display: flex;
    gap: 16px;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
  }
  .btn {
    font-family: var(--t-body);
    font-size: 15px;
    font-weight: 500;
    padding: 14px 28px;
    border-radius: 999px;
    border: 1.5px solid var(--ink);
    background: var(--ink);
    color: var(--paper);
    cursor: pointer;
    letter-spacing: 0.01em;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    transition: all 0.2s ease;
  }
  .btn:hover {
    background: var(--indigo);
    border-color: var(--indigo);
    box-shadow: 0 8px 24px -8px var(--indigo-glow);
    transform: translateY(-2px);
  }
  .btn.ghost {
    background: transparent;
    color: var(--ink);
  }
  .btn.ghost:hover {
    color: var(--paper);
  }
  .btn svg { width: 16px; height: 16px; }

  .footer-meta {
    margin-top: 48px;
    text-align: center;
    font-family: var(--t-mono);
    font-size: 11px;
    color: var(--muted);
    letter-spacing: 0.12em;
    text-transform: uppercase;
  }
  .footer-meta span { color: var(--ink); font-weight: 500; }

  /* Mobile responsiveness */
  @media (max-width: 860px) {
    .compare, .prng-split, .s5-grid, .takeaway-grid, .arch-layers, .flow-row {
      grid-template-columns: 1fr !important;
    }
    .flow-arrow { transform: rotate(90deg); margin: 8px auto; }
    .arch-layer:first-child { border-right: none; border-bottom: 1px dashed var(--line); }
    .s5-side { position: static; }
    .dotnav { display: none; }
  }

  /* ---------- Print styles ---------- */
  @media print {
    @page {
      size: A4 landscape;
      margin: 0;
    }
    html, body {
      scroll-snap-type: none;
      background: var(--bg);
      -webkit-print-color-adjust: exact;
      print-color-adjust: exact;
    }
    .progress, .dotnav, .pdf-cta { display: none !important; }
    .section {
      min-height: auto;
      height: 100vh;
      page-break-after: always;
      break-after: page;
      padding: 32px 56px;
      -webkit-print-color-adjust: exact;
      print-color-adjust: exact;
    }
    .reveal {
      opacity: 1 !important;
      transform: none !important;
    }
    .terminal { box-shadow: none; }
    #s1::before { opacity: 0.1; }
  }

  /* ════════════════════════════════════════════════════════════════
     SECTION sdet — 3D Determinismus-Visualisierung
     ════════════════════════════════════════════════════════════════ */
  #sdet {
    padding: var(--section-pad-y) var(--section-pad-x);
    min-height: 100vh;
    display: flex;
    align-items: center;
  }
  .det-wrap {
    max-width: 1380px;
    margin: 0 auto;
    width: 100%;
  }
  .det-stage {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(16px, 2vw, 28px);
    margin-top: clamp(24px, 3vh, 40px);
  }
  .det-pane {
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 14px;
    box-shadow: 0 4px 20px rgba(26,31,46,0.06);
    display: flex;
    flex-direction: column;
    gap: 10px;
  }
  .det-pane.det-left { border-color: rgba(181,67,56,0.25); }
  .det-pane.det-right { border-color: rgba(58,76,214,0.25); }
  .det-pane-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 4px;
  }
  .det-tag {
    font-family: var(--t-mono);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 4px 10px;
    border-radius: 4px;
  }
  .det-tag.bad { background: rgba(181,67,56,0.12); color: var(--crimson); }
  .det-tag.good { background: rgba(58,76,214,0.12); color: var(--indigo); }
  .det-runs {
    font-family: var(--t-mono);
    font-size: 12px;
    color: var(--muted);
  }
  .det-runs b { color: var(--ink); font-weight: 600; }
  .det-canvas-wrap {
    position: relative;
    width: 100%;
    aspect-ratio: 4 / 3;
    background: linear-gradient(180deg, #ece4d4 0%, #d8cdb8 100%);
    border-radius: 8px;
    overflow: hidden;
  }
  .det-canvas-wrap canvas {
    width: 100% !important;
    height: 100% !important;
    display: block;
  }
  .det-pane-foot {
    font-family: var(--t-body);
    font-size: 14px;
    color: var(--ink-soft);
    padding: 0 4px;
    line-height: 1.45;
  }
  .det-controls {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: clamp(20px, 3vh, 32px);
  }
  .det-btn {
    font-family: var(--t-body);
    font-size: 14px;
    font-weight: 500;
    padding: 10px 20px;
    border: 1px solid var(--ink);
    background: var(--paper);
    color: var(--ink);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.15s ease;
  }
  .det-btn:hover { background: var(--ink); color: var(--paper); }
  .det-btn.primary {
    background: var(--ink);
    color: var(--paper);
  }
  .det-btn.primary:hover {
    background: var(--indigo);
    border-color: var(--indigo);
  }
  .det-btn.ghost {
    border-color: var(--line);
    color: var(--muted);
  }
  .det-btn.ghost:hover {
    background: transparent;
    color: var(--ink);
    border-color: var(--ink);
  }

  @media (max-width: 860px) {
    .det-stage { grid-template-columns: 1fr; }
  }


  /* ════════════════════════════════════════════════════════════════
     SECTION s7 — Quellen
     ════════════════════════════════════════════════════════════════ */
  #s7 {
    padding: var(--section-pad-y) var(--section-pad-x);
    min-height: 100vh;
    display: flex;
    align-items: center;
  }
  .sources-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-top: clamp(24px, 3vh, 36px);
  }
  .source-item {
    display: grid;
    grid-template-columns: 56px 1fr auto;
    gap: 18px;
    align-items: center;
    padding: 16px 22px;
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: 8px;
    transition: border-color 0.2s ease, transform 0.2s ease;
  }
  .source-item:hover {
    border-color: var(--indigo);
    transform: translateX(2px);
  }
  .src-num {
    font-family: var(--t-mono);
    font-size: 13px;
    font-weight: 600;
    color: var(--indigo);
    letter-spacing: 0.05em;
  }
  .src-body {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 0;
  }
  .src-title {
    font-family: var(--t-body);
    font-size: 17px;
    color: var(--ink);
    line-height: 1.45;
  }
  .src-title em {
    font-family: var(--t-display);
    font-style: italic;
    font-weight: 400;
  }
  .src-link {
    font-family: var(--t-mono);
    font-size: 12px;
    color: var(--muted);
    text-decoration: none;
    border-bottom: 1px dashed transparent;
    transition: color 0.15s ease, border-color 0.15s ease;
    word-break: break-all;
  }
  .src-link:hover {
    color: var(--indigo);
    border-bottom-color: var(--indigo);
  }
  .src-link-static {
    cursor: default;
    border-bottom: none;
  }
  .src-link-static:hover {
    color: var(--muted);
    border-bottom: none;
  }
  .src-meta {
    font-family: var(--t-mono);
    font-size: 11px;
    color: var(--muted);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    white-space: nowrap;
  }

  .ki-hint {
    margin-top: clamp(28px, 4vh, 48px);
    text-align: center;
  }
  .ki-chip {
    display: inline-block;
    font-family: var(--t-mono);
    font-size: 12px;
    color: var(--muted);
    letter-spacing: 0.08em;
    padding: 6px 14px;
    border: 1px dashed var(--line);
    border-radius: 4px;
  }

  @media (max-width: 720px) {
    .source-item {
      grid-template-columns: 1fr;
      gap: 8px;
    }
    .src-meta { justify-self: start; }
  }


  /* ════════════════════════════════════════════════════════════════
     BOOT SCREEN — Terminal-Style, an Cream-Palette angepasst
     ════════════════════════════════════════════════════════════════ */
  .boot {
    position: fixed;
    inset: 0;
    z-index: 10000;
    background:
      linear-gradient(180deg, #f3ede2 0%, #ece4d4 50%, #ebe2cf 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--t-mono);
    color: var(--ink);
    font-size: 13px;
    transition: opacity 0.7s cubic-bezier(0.2, 0.8, 0.2, 1), visibility 0.7s;
  }
  .boot.done {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
  }
  .boot__inner {
    width: min(620px, 92vw);
    padding: 36px 40px;
    border: 1px solid var(--line);
    background: var(--paper);
    border-radius: 8px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 18px 50px rgba(26, 31, 46, 0.10), 0 0 0 1px rgba(58, 76, 214, 0.06);
  }
  .boot__inner::before {
    content: "";
    position: absolute;
    inset: -1px;
    border-radius: 8px;
    background: linear-gradient(120deg, transparent 30%, rgba(58, 76, 214, 0.10), transparent 70%);
    background-size: 300% 100%;
    animation: bootSheen 2.8s ease-in-out infinite;
    pointer-events: none;
  }
  @keyframes bootSheen {
    0%   { background-position: -100% 0; }
    100% { background-position: 200% 0; }
  }
  .boot__head {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 22px;
    font-size: 11px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--muted);
  }
  .boot__dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--indigo);
    box-shadow: 0 0 12px var(--indigo-glow);
    animation: bootPulse 1.2s ease-in-out infinite;
  }
  @keyframes bootPulse {
    0%, 100% { opacity: 0.4; }
    50%      { opacity: 1; }
  }
  .boot__lines {
    min-height: 200px;
    margin-bottom: 6px;
  }
  .boot__line {
    display: flex;
    gap: 12px;
    line-height: 1.8;
    opacity: 0;
    animation: bootLineIn 0.3s forwards;
  }
  .boot__line .t {
    color: var(--muted);
    min-width: 86px;
  }
  .boot__line .m {
    color: var(--ink-soft);
    flex: 1;
  }
  .boot__line .s {
    color: var(--indigo);
    font-weight: 500;
  }
  .boot__line .s--ok {
    color: var(--green);
    font-weight: 600;
  }
  .boot__line--faded {
    opacity: 0.35;
  }
  @keyframes bootLineIn {
    to { opacity: 1; }
  }
  .boot__progress {
    margin-top: 20px;
    height: 2px;
    background: rgba(26, 31, 46, 0.08);
    border-radius: 1px;
    overflow: hidden;
  }
  .boot__progress-bar {
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, var(--indigo), var(--amber));
    box-shadow: 0 0 8px var(--indigo-glow);
    transition: width 0.12s linear;
  }
  .boot__foot {
    margin-top: 14px;
    display: flex;
    justify-content: space-between;
    font-size: 10px;
    letter-spacing: 0.14em;
    color: var(--muted);
    text-transform: uppercase;
  }

  @media print {
    .boot { display: none !important; }
  }


  /* ════════════════════════════════════════════════════════════════
     Scrollbar verstecken + Custom Cursor
     ════════════════════════════════════════════════════════════════ */
  html { scrollbar-width: none; -ms-overflow-style: none; }
  html::-webkit-scrollbar { width: 0; height: 0; display: none; }
  body { cursor: none; }

  .cursor {
    position: fixed;
    top: 0;
    left: 0;
    width: 16px;
    height: 16px;
    background: var(--indigo);
    box-shadow: 0 0 0 1px rgba(58, 76, 214, 0.25), 0 0 16px rgba(58, 76, 214, 0.45);
    transform: translate3d(-50%, -50%, 0);
    pointer-events: none;
    z-index: 99999;
    mix-blend-mode: multiply;
    transition: width 0.18s ease, height 0.18s ease, background 0.18s ease, opacity 0.2s ease;
    opacity: 0;
  }
  .cursor.is-active { opacity: 1; }
  .cursor.is-hover {
    width: 28px;
    height: 28px;
    background: var(--amber);
  }


  /* PRNG-Abkürzung */
  .prng-abbr {
    font-family: var(--t-mono);
    font-size: 12px;
    color: var(--muted);
    letter-spacing: 0.06em;
    margin-top: -8px;
    margin-bottom: clamp(20px, 2.5vh, 28px);
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }
  .prng-abbr span {
    color: var(--indigo);
    font-weight: 600;
    letter-spacing: 0.12em;
  }
  .prng-abbr em {
    font-family: var(--t-display);
    font-style: italic;
    font-weight: 400;
    color: var(--ink-soft);
    font-size: 14px;
  }


  /* ════════════════════════════════════════════════════════════════
     SECTION s4 — Flax mit PyTree-Visualisierung
     ════════════════════════════════════════════════════════════════ */
  .flax-pillars {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: clamp(12px, 1.6vw, 20px);
    margin: clamp(24px, 3vh, 36px) 0 clamp(28px, 4vh, 44px);
  }
  .pillar {
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 18px 20px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    position: relative;
    transition: border-color 0.2s ease, transform 0.2s ease;
  }
  .pillar:hover { border-color: var(--indigo); transform: translateY(-2px); }
  .pillar-num {
    font-family: var(--t-mono);
    font-size: 11px;
    color: var(--muted);
    letter-spacing: 0.12em;
  }
  .pillar h5 {
    font-family: var(--t-display);
    font-size: 22px;
    font-weight: 400;
    line-height: 1.1;
    color: var(--ink);
  }
  .pillar p {
    color: var(--ink-soft);
    font-size: 16px;
    line-height: 1.55;
  }
  .pillar code {
    font-family: var(--t-mono);
    font-size: 13px;
    color: var(--indigo);
    background: rgba(58, 76, 214, 0.08);
    padding: 1px 5px;
    border-radius: 3px;
  }

  .flax-flow {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
    margin-top: clamp(8px, 1vh, 16px);
  }
  .flow-call {
    width: min(580px, 100%);
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 14px 22px;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 18px;
    box-shadow: 0 2px 12px rgba(26, 31, 46, 0.04);
  }
  .init-call { border-color: rgba(200, 134, 42, 0.35); }
  .apply-call { border-color: rgba(58, 76, 214, 0.35); }
  .call-tag {
    font-family: var(--t-mono);
    font-size: 11px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--paper);
    background: var(--amber);
    padding: 5px 10px;
    border-radius: 4px;
    white-space: nowrap;
  }
  .apply-call .call-tag { background: var(--indigo); }
  .call-code {
    font-family: var(--t-mono);
    font-size: 14px;
    color: var(--ink);
  }
  .call-code b { color: var(--indigo); font-weight: 600; }
  .call-hint {
    font-family: var(--t-body);
    font-size: 12px;
    color: var(--muted);
    font-style: italic;
    white-space: nowrap;
  }

  .flow-vert-arrow {
    width: 24px;
    height: clamp(40px, 5vh, 56px);
    display: flex;
    justify-content: center;
  }
  .flow-vert-arrow svg {
    width: 100%;
    height: 100%;
  }

  .pytree {
    width: min(720px, 100%);
    background: linear-gradient(180deg, var(--paper) 0%, var(--bg-2) 100%);
    border: 1.5px solid var(--ink);
    border-radius: 10px;
    padding: 22px 28px;
    box-shadow: 0 8px 32px rgba(26, 31, 46, 0.10);
    position: relative;
  }
  .pytree::before {
    content: "";
    position: absolute;
    inset: -1px;
    border-radius: 10px;
    background: linear-gradient(120deg, transparent 30%, rgba(58, 76, 214, 0.06), transparent 70%);
    pointer-events: none;
  }
  .pytree-header {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding-bottom: 14px;
    margin-bottom: 16px;
    border-bottom: 1px dashed var(--line);
  }
  .pytree-glyph {
    font-family: var(--t-display);
    font-size: 40px;
    line-height: 0.9;
    color: var(--indigo);
  }
  .pytree-title {
    font-family: var(--t-display);
    font-size: 26px;
    line-height: 1.1;
    color: var(--ink);
    display: flex;
    align-items: baseline;
    gap: 12px;
  }
  .pytree-meta {
    font-family: var(--t-mono);
    font-size: 13px;
    color: var(--indigo);
    background: rgba(58, 76, 214, 0.10);
    padding: 2px 8px;
    border-radius: 3px;
    font-style: normal;
  }
  .pytree-sub {
    font-family: var(--t-body);
    font-size: 12px;
    color: var(--muted);
    margin-top: 4px;
    letter-spacing: 0.02em;
  }
  .pytree-body {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }
  .pytree-node {
    position: relative;
    padding-left: 22px;
  }
  .pytree-node::before {
    content: "";
    position: absolute;
    left: 5px;
    top: 9px;
    width: 12px;
    height: 1.5px;
    background: var(--ink);
    opacity: 0.4;
  }
  .pytree-node::after {
    content: "";
    position: absolute;
    left: 5px;
    top: 0;
    bottom: -12px;
    width: 1.5px;
    background: var(--ink);
    opacity: 0.2;
  }
  .pytree-node:last-child::after { bottom: 50%; }
  .node-name {
    font-family: var(--t-mono);
    font-size: 14px;
    font-weight: 600;
    color: var(--ink);
    background: var(--paper);
    padding: 2px 8px;
    border: 1px solid var(--line);
    border-radius: 3px;
  }
  .pytree-leaves {
    display: flex;
    gap: 10px;
    margin-top: 8px;
    margin-left: 16px;
    flex-wrap: wrap;
    position: relative;
  }
  .pytree-leaves::before {
    content: "";
    position: absolute;
    left: -16px;
    top: -6px;
    width: 1.5px;
    height: 100%;
    background: var(--ink);
    opacity: 0.18;
  }
  .leaf {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: 4px;
    position: relative;
    font-family: var(--t-mono);
    font-size: 12px;
  }
  .leaf::before {
    content: "";
    position: absolute;
    left: -10px;
    top: 50%;
    width: 10px;
    height: 1.5px;
    background: var(--ink);
    opacity: 0.18;
  }
  .leaf-key {
    color: var(--amber);
    font-weight: 600;
  }
  .leaf-shape {
    color: var(--muted);
  }

  @media (max-width: 720px) {
    .flax-pillars { grid-template-columns: 1fr; }
    .flow-call { grid-template-columns: 1fr; gap: 8px; text-align: left; }
    .call-hint { white-space: normal; }
    .pytree { padding: 18px 20px; }
    .pytree-leaves { margin-left: 8px; }
  }