/* ─────────────────────────────────────────────
     HAI — LIGHT EDITORIAL EDITION
     Design tokens: warm paper, near-black ink,
     single restrained cobalt accent.
     ───────────────────────────────────────────── */
  :root {
    --paper:       #FFFFFF;   /* white page */
    --panel:       #F5F5F4;   /* faint raised panels */
    --panel-pure:  #FFFFFF;
    --ink:         #191A1E;   /* near-black, warm */
    --ink-soft:    #6E6F68;   /* muted body */
    --ink-faint:   #A2A39A;   /* faint labels */
    --line:        #E6E6E4;   /* hairline */
    --line-soft:   #EFEFEE;
    --accent:      #1E3FE6;   /* cobalt — used sparingly */
    --accent-wash: rgba(30, 63, 230, 0.06);
    --numeral:     #ECECEA;   /* giant section numerals */

    --font-display: 'Space Grotesk', system-ui, sans-serif;
    --font-body:    'IBM Plex Sans', system-ui, sans-serif;
    --font-mono:    'IBM Plex Mono', ui-monospace, monospace;

    --max-w:  1180px;
    --gutter: clamp(1.25rem, 4vw, 3.5rem);
    --nav-h:  62px;
  }

  *, *::before, *::after { box-sizing: border-box; }
  html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; scroll-padding-top: calc(var(--nav-h) + 24px); }

  body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--font-body);
    font-size: 17px;
    line-height: 1.65;
    font-weight: 400;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
  }
  ::selection { background: var(--ink); color: var(--paper); }

  a { color: inherit; }

  h1, h2, h3 { font-weight: 500; }

  /* ── progress bar ───────────────────────────── */
  .scroll-progress {
    position: fixed; top: 0; left: 0; height: 2px;
    width: 0%; background: var(--accent);
    z-index: 200; transition: width .12s linear;
  }

  /* ── sticky navigator ───────────────────────── */
  .nav {
    position: sticky; top: 0; z-index: 100;
    background: rgba(255, 255, 255, 0.86);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
  }
  .nav-inner {
    max-width: var(--max-w); margin: 0 auto;
    padding: 0 var(--gutter);
    height: var(--nav-h);
    display: flex; align-items: center; justify-content: space-between;
    gap: 1.5rem;
  }
  .wordmark {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.4rem; letter-spacing: -0.01em;
    text-decoration: none; color: var(--ink);
    white-space: nowrap; flex-shrink: 0;
  }
  .wordmark .dot { color: var(--accent); }

  .rail {
    display: flex; align-items: center; gap: 0.15rem;
    overflow-x: auto; scrollbar-width: none;
    -ms-overflow-style: none;
    margin-left: auto;
  }
  .rail::-webkit-scrollbar { display: none; }
  .rail-item {
    display: flex; align-items: baseline; gap: 0.4rem;
    text-decoration: none;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--ink-faint);
    padding: 0.45rem 0.5rem;
    border-radius: 2px;
    transition: color .2s;
    white-space: nowrap;
  }
  .rail-item:hover { color: var(--ink); }
  .rail-item .rail-label {
    max-width: 0; overflow: hidden;
    letter-spacing: 0.04em; text-transform: uppercase;
    transition: max-width .35s ease, opacity .25s ease;
    opacity: 0;
  }
  .rail-item.active { color: var(--accent); }
  .rail-item.active .rail-num { font-weight: 500; }
  .rail-item.active .rail-label { max-width: 220px; opacity: 1; }
  @media (max-width: 860px) {
    .rail-item.active .rail-label { max-width: 0; opacity: 0; }
    .rail-item { padding: 0.45rem 0.34rem; }
  }

  /* ── layout shell ───────────────────────────── */
  .wrap {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 var(--gutter);
  }

  /* ── hero ───────────────────────────────────── */
  .hero { position: relative; overflow: hidden; background: #ffffff; padding: clamp(4rem, 11vw, 9rem) 0 clamp(3rem, 7vw, 6rem); }
  .hero .wrap { position: relative; z-index: 1; }
  .hero-net {
    position: absolute; inset: 0;
    width: 100%; height: 100%;
    z-index: 0; pointer-events: none;
  }
  .eyebrow {
    font-family: var(--font-mono);
    font-size: 0.74rem; letter-spacing: 0.13em;
    text-transform: uppercase; color: var(--accent);
    margin-bottom: 1.6rem;
  }
  .hero h1 {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: clamp(2.9rem, 8vw, 6.4rem);
    line-height: 1.04;
    letter-spacing: -0.03em;
    margin: 0 0 1.8rem;
    max-width: 16ch;
  }
  .hero h1 em { font-style: normal; font-weight: 500; }
  .tagline {
    display: flex; flex-wrap: wrap; gap: 0.2rem 2.2rem;
    margin: 0 0 2rem; padding: 1.1rem 0;
    border-top: 1px solid var(--ink); border-bottom: 1px solid var(--line);
    font-family: var(--font-display); font-weight: 500;
    font-size: clamp(1.15rem, 2.6vw, 1.75rem);
    letter-spacing: -0.015em; line-height: 1.3;
    max-width: max-content;
  }
  .tagline .tl { color: var(--ink); text-decoration: none; white-space: nowrap; transition: color .2s; }
  .tagline .tl:hover { color: var(--accent); }
  .tagline .tl-n {
    font-family: var(--font-mono); font-weight: 400;
    font-size: 0.62rem; letter-spacing: 0.1em;
    color: var(--accent); margin-right: 0.55rem;
    vertical-align: 0.5em;
  }
  .hero-sub {
    font-size: clamp(1.05rem, 2vw, 1.35rem);
    color: var(--ink);
    max-width: 56ch;
    line-height: 1.55;
    margin: 0 0 1.6rem;
  }
  .hero-byline {
    font-size: 0.95rem; color: var(--ink);
    margin: 0 0 2.4rem;
  }
  .hero-byline strong { color: var(--ink); font-weight: 600; }

  .badges { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 3.2rem; }
  .badge {
    font-family: var(--font-mono);
    font-size: 0.68rem; letter-spacing: 0.05em;
    text-transform: uppercase;
    padding: 0.4rem 0.7rem;
    border: 1px solid var(--line);
    border-radius: 2px;
    color: var(--ink-soft);
    background: var(--panel);
  }
  .badge.lead { border-color: var(--ink); color: var(--ink); }

  .meta-strip {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--line);
    border-top: 1px solid var(--ink);
    border-bottom: 1px solid var(--line);
  }
  @media (max-width: 720px) { .meta-strip { grid-template-columns: repeat(2, 1fr); } }
  .meta-cell {
    background: var(--paper);
    padding: 1.3rem 1.4rem;
  }
  .meta-cell:first-child { padding-left: 0; }
  .meta-cell:last-child { padding-right: 0; }
  .meta-label {
    font-family: var(--font-mono);
    font-size: 0.66rem; letter-spacing: 0.1em;
    text-transform: uppercase; color: var(--ink-faint);
    margin-bottom: 0.5rem;
  }
  .meta-value { font-size: 0.95rem; color: var(--ink); font-weight: 500; }
  .meta-value a { color: var(--accent); text-decoration: none; }
  .meta-value a:hover { text-decoration: underline; }

  /* ── section block icons (§03, §05) ─────────── */
  .block-icon {
    display: block;
    height: 50px; width: auto;
    margin: 0 0 1rem;
  }

  /* ── section scaffold ───────────────────────── */
  .section {
    padding: clamp(4.5rem, 9vw, 8.5rem) 0;
    border-top: 1px solid var(--line);
  }
  .sec-grid {
    display: grid;
    grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 5.5rem);
  }
  @media (max-width: 880px) {
    .sec-grid { grid-template-columns: 1fr; gap: 1.8rem; }
  }
  .sec-index { position: relative; }
  @media (min-width: 881px) {
    .sec-index { position: sticky; top: calc(var(--nav-h) + 48px); align-self: start; }
  }
  .sec-numeral {
    font-family: var(--font-display);
    font-weight: 300;
    font-size: clamp(5rem, 13vw, 11rem);
    line-height: 0.82;
    color: var(--numeral);
    letter-spacing: -0.04em;
    display: block;
  }
  .sec-kicker {
    font-family: var(--font-mono);
    font-size: 0.74rem; letter-spacing: 0.1em;
    text-transform: uppercase; color: var(--ink-soft);
    margin-top: 1.3rem;
    padding-top: 1.1rem;
    border-top: 1px solid var(--ink);
    display: block;
  }
  .sec-title {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: clamp(1.8rem, 3.6vw, 3rem);
    line-height: 1.1;
    letter-spacing: -0.025em;
    margin: 0 0 1.6rem;
    max-width: 22ch;
  }
  .sec-title em { font-style: normal; font-weight: 300; }
  .lede {
    font-size: clamp(1.05rem, 1.6vw, 1.2rem);
    color: var(--ink);
    line-height: 1.6;
    max-width: 60ch;
    margin: 0 0 2.4rem;
  }
  .prose p {
    color: var(--ink);
    max-width: 64ch;
    margin: 0 0 1.1rem;
  }
  .prose p strong { color: var(--ink); font-weight: 600; }
  .prose p:last-child { margin-bottom: 0; }

  /* ── keywords ───────────────────────────────── */
  .keywords {
    margin-top: 2.4rem; padding-top: 1.6rem;
    border-top: 1px solid var(--line);
    display: flex; flex-wrap: wrap; gap: 0.5rem 0.4rem;
    align-items: baseline;
  }
  .keywords .kw-head {
    font-family: var(--font-mono); font-size: 0.68rem;
    letter-spacing: 0.1em; text-transform: uppercase;
    color: var(--ink-faint); margin-right: 0.5rem;
  }
  .kw {
    font-size: 0.82rem; color: var(--ink-soft);
    border: 1px solid var(--line); border-radius: 2px;
    padding: 0.28rem 0.6rem; background: var(--panel);
  }

  /* ── two-column comparison panels ───────────── */
  .duo {
    display: grid; grid-template-columns: 1fr 1fr;
    border: 1px solid var(--ink);
  }
  @media (max-width: 680px) { .duo { grid-template-columns: 1fr; } }
  .duo-cell { padding: clamp(1.6rem, 3vw, 2.4rem); }
  .duo-cell:first-child { border-right: 1px solid var(--line); }
  @media (max-width: 680px) {
    .duo-cell:first-child { border-right: none; border-bottom: 1px solid var(--line); }
  }
  .duo-tag {
    font-family: var(--font-mono); font-size: 0.68rem;
    letter-spacing: 0.08em; text-transform: uppercase;
    color: var(--ink-faint); margin-bottom: 0.9rem;
  }
  .duo-cell h3 {
    font-family: var(--font-display);
    font-size: 1.6rem; margin: 0 0 0.8rem;
    letter-spacing: -0.01em;
  }
  .duo-cell p { color: var(--ink); margin: 0 0 0.7rem; font-size: 0.96rem; }
  .duo-cell p:last-child { margin-bottom: 0; }
  .duo-cell p strong { color: var(--ink); font-weight: 600; }

  /* ── numbered layer / case blocks ───────────── */
  .blocks { border-top: 1px solid var(--line); margin-top: 0.5rem; }
  .block {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: clamp(1.2rem, 3vw, 2.6rem);
    padding: 1.9rem 0;
    border-bottom: 1px solid var(--line);
  }
  .block-tag-sub { display: block; margin-top: 0.35rem; color: var(--ink-faint); letter-spacing: 0.04em; }
  .block-tag {
    font-family: var(--font-mono); font-size: 0.72rem;
    letter-spacing: 0.06em; text-transform: uppercase;
    color: var(--accent); white-space: nowrap;
    padding-top: 0.35rem;
  }
  .block h3 {
    font-family: var(--font-display);
    font-size: 1.5rem; margin: 0 0 0.5rem;
    letter-spacing: -0.01em;
  }
  .block p { color: var(--ink); margin: 0; font-size: 0.97rem; max-width: 62ch; }
  .block .when {
    font-family: var(--font-mono); font-size: 0.74rem;
    color: var(--ink-faint); margin-top: 0.7rem;
    text-transform: uppercase; letter-spacing: 0.04em;
  }

  /* ── spec / comparison table ────────────────── */
  .spec { border: 1px solid var(--ink); margin-top: 0.5rem; }
  .spec-row {
    display: grid;
    grid-template-columns: 200px 1fr 1fr;
    border-bottom: 1px solid var(--line);
  }
  .spec-row:last-child { border-bottom: none; }
  .spec-row.head {
    background: var(--ink); color: var(--paper);
  }
  .spec-row.head .spec-cell { color: var(--paper); }
  .spec-cell {
    padding: 1rem 1.3rem;
    font-size: 0.92rem;
    border-right: 1px solid var(--line);
  }
  .spec-row.head .spec-cell { border-right-color: rgba(244,243,238,0.18); }
  .spec-cell:last-child { border-right: none; }
  .spec-cell.key {
    font-family: var(--font-mono); font-size: 0.74rem;
    letter-spacing: 0.04em; text-transform: uppercase;
    color: var(--ink-soft);
  }
  .spec-row.head .spec-cell {
    font-family: var(--font-mono); font-size: 0.72rem;
    letter-spacing: 0.07em; text-transform: uppercase;
  }
  @media (max-width: 720px) {
    .spec-row, .spec-row.head { grid-template-columns: 1fr; }
    .spec-cell { border-right: none; border-bottom: 1px solid var(--line-soft); }
    .spec-cell:last-child { border-bottom: none; }
    .spec-row { border-bottom-width: 1px; }
    .spec-row.head { display: none; }
    .spec-cell.key { background: var(--panel); }
  }

  /* ── horizontal stepper (failure states) ────── */
  .stepper {
    display: grid; grid-template-columns: repeat(5, 1fr);
    gap: 1px; background: var(--line);
    margin-top: 0.5rem;
    border-top: 1px solid var(--ink);
    border-bottom: 1px solid var(--line);
  }
  @media (max-width: 780px) { .stepper { grid-template-columns: 1fr; } }
  .step {
    background: var(--paper);
    padding: 1.6rem 1.3rem;
  }
  .step:first-child { padding-left: 0; }
  .step:last-child { padding-right: 0; }
  @media (max-width: 780px) {
    .step:first-child { padding-left: 1.3rem; }
    .step:last-child { padding-right: 1.3rem; }
  }
  .step-num {
    font-family: var(--font-mono); font-size: 0.68rem;
    letter-spacing: 0.08em; text-transform: uppercase;
    color: var(--ink-faint); margin-bottom: 0.35rem;
  }
  .step h3 {
    font-family: var(--font-display); font-size: 1.3rem;
    margin: 0 0 0.5rem;
  }
  .step p { font-size: 0.86rem; color: var(--ink); margin: 0; }

  /* ── protocol stack rows ────────────────────── */
  .stack { border: 1px solid var(--ink); margin-top: 0.5rem; }
  .stack-row {
    display: grid; grid-template-columns: 170px 1fr 150px;
    gap: 1.5rem; align-items: baseline;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--line);
  }
  .stack-row:last-child { border-bottom: none; }
  @media (max-width: 720px) {
    .stack-row { grid-template-columns: 1fr; gap: 0.4rem; }
  }
  .stack-layer {
    font-family: var(--font-mono); font-size: 0.72rem;
    letter-spacing: 0.06em; text-transform: uppercase;
    color: var(--ink-faint);
  }
  .stack-proto { color: var(--ink); font-size: 0.95rem; }
  .stack-proto strong {
    font-family: var(--font-display); font-weight: 500;
    color: var(--ink); font-size: 1.15rem;
    margin-right: 0.55rem;
  }
  .stack-status {
    font-family: var(--font-mono); font-size: 0.7rem;
    letter-spacing: 0.05em; text-transform: uppercase;
    color: var(--accent); text-align: right;
  }
  @media (max-width: 720px) { .stack-status { text-align: left; } }

  /* ── sovereignty grid ───────────────────────── */
  .sov-grid {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 1px; background: var(--line);
    border: 1px solid var(--line); margin-top: 0.5rem;
  }
  @media (max-width: 820px) { .sov-grid { grid-template-columns: repeat(2, 1fr); } }
  @media (max-width: 560px) { .sov-grid { grid-template-columns: 1fr; } }
  .sov-card {
    background: var(--panel-pure);
    padding: 1.5rem;
    display: flex; flex-direction: column;
  }
  .sov-num {
    font-family: var(--font-mono); font-size: 0.68rem;
    letter-spacing: 0.1em; text-transform: uppercase;
    color: var(--accent); margin-bottom: 0.7rem;
  }
  .sov-card h3 {
    font-family: var(--font-display); font-size: 1.22rem;
    margin: 0 0 0.55rem; line-height: 1.12;
    letter-spacing: -0.01em;
  }
  .sov-card p { font-size: 0.88rem; color: var(--ink); margin: 0 0 1rem; }
  .sov-map {
    margin-top: auto; padding-top: 0.8rem;
    border-top: 1px solid var(--line);
    font-family: var(--font-mono); font-size: 0.66rem;
    letter-spacing: 0.03em; text-transform: uppercase;
    color: var(--ink-faint); line-height: 1.5;
  }

  /* ── callouts ───────────────────────────────── */
  .callout {
    margin-top: 1.5rem;
    background: var(--panel-pure);
    border: 1px solid var(--line);
    border-left: 2px solid var(--accent);
    padding: 1.5rem 1.7rem;
  }
  .callout .co-label {
    font-family: var(--font-mono); font-size: 0.7rem;
    letter-spacing: 0.09em; text-transform: uppercase;
    color: var(--accent); display: block; margin-bottom: 0.6rem;
  }
  .callout p { margin: 0; color: var(--ink); font-size: 0.96rem; }
  .callout p strong { color: var(--ink); font-weight: 600; }
  .callout em { color: var(--ink); font-style: normal; font-weight: 600; }

  .note-strip {
    margin-top: 1.5rem;
    border: 1px solid var(--line);
    background: var(--accent-wash);
    padding: 1.5rem 1.7rem;
    font-family: var(--font-mono);
    font-size: 0.82rem; line-height: 1.7;
    color: var(--ink);
  }
  .note-strip strong { color: var(--accent); }

  /* ── six questions ──────────────────────────── */
  .qlist { margin-top: 2rem; border-top: 1px solid var(--line); }
  .qlist .q {
    display: flex; gap: 1rem; align-items: baseline;
    padding: 0.85rem 0; border-bottom: 1px solid var(--line);
    color: var(--ink); font-size: 0.95rem;
  }
  .qlist .q .qn {
    font-family: var(--font-mono); font-size: 0.72rem;
    color: var(--accent); flex-shrink: 0;
  }

  /* ── download list ──────────────────────────── */
  .dl-list { border-top: 1px solid var(--ink); margin-top: 0.5rem; }
  .dl {
    display: flex; align-items: center; gap: 1.3rem;
    padding: 1.5rem 0.5rem 1.5rem 0;
    border-bottom: 1px solid var(--line);
    text-decoration: none; color: var(--ink);
    transition: padding-left .25s ease, background .25s ease;
  }
  .dl:hover { padding-left: 1rem; background: var(--panel); }
  .dl-mark {
    font-family: var(--font-mono); font-size: 1.8rem;
    color: var(--accent); width: 2.6rem; flex-shrink: 0;
    text-align: center;
  }
  .dl-text { flex: 1; }
  .dl-title { display: block; font-family: var(--font-display); font-weight: 500; font-size: 1.25rem; letter-spacing: -0.01em; }
  .dl-meta {
    display: block;
    font-family: var(--font-mono); font-size: 0.72rem;
    letter-spacing: 0.04em; text-transform: uppercase;
    color: var(--ink-faint); margin-top: 0.3rem;
  }
  .dl-arrow { font-size: 1.1rem; color: var(--ink-faint); transition: transform .25s ease, color .25s ease; }
  .dl:hover .dl-arrow { transform: translateX(4px); color: var(--accent); }

  /* ── citation ───────────────────────────────── */
  .cite-block { position: relative; margin-top: 0.5rem; }
  pre#bibtex {
    background: var(--panel-pure);
    border: 1px solid var(--line);
    padding: 1.7rem 1.8rem;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.82rem; line-height: 1.7;
    color: var(--ink);
    margin: 0;
  }
  .copy-btn {
    position: absolute; top: 0.9rem; right: 0.9rem;
    font-family: var(--font-mono); font-size: 0.68rem;
    letter-spacing: 0.06em; text-transform: uppercase;
    background: var(--ink); color: var(--paper);
    border: none; border-radius: 2px;
    padding: 0.45rem 0.8rem; cursor: pointer;
    transition: background .2s;
  }
  .copy-btn:hover { background: var(--accent); }
  .copy-btn.copied { background: var(--accent); }
  .cite-plain {
    margin-top: 1.3rem; font-size: 0.9rem;
    color: var(--ink); line-height: 1.6;
  }
  .cite-plain .lbl {
    font-family: var(--font-mono); font-size: 0.68rem;
    letter-spacing: 0.08em; text-transform: uppercase;
    color: var(--ink-faint); margin-right: 0.4rem;
  }
  .cite-plain em { font-style: italic; }

  /* ── author ─────────────────────────────────── */
  .author-name {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: clamp(2.2rem, 5vw, 3.4rem);
    line-height: 1.02; letter-spacing: -0.025em;
    margin: 0 0 1rem;
  }
  .author-affil {
    font-family: var(--font-mono); font-size: 0.78rem;
    letter-spacing: 0.05em; text-transform: uppercase;
    color: var(--ink-soft); margin-bottom: 0.4rem;
  }
  .author-orcid {
    font-family: var(--font-mono); font-size: 0.78rem;
    color: var(--accent); text-decoration: none;
  }
  .author-orcid:hover { text-decoration: underline; }
  .author-bio { margin-top: 2rem; }
  .author-bio p { color: var(--ink); max-width: 64ch; margin: 0 0 1.1rem; }
  .author-bio p:last-child { margin-bottom: 0; }

  /* ── footer ─────────────────────────────────── */
  footer {
    border-top: 1px solid var(--ink);
    padding: clamp(3rem, 6vw, 5rem) 0 2.5rem;
  }
  .foot-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }
  @media (max-width: 720px) { .foot-grid { grid-template-columns: 1fr; gap: 2rem; } }
  .foot-grid h4 {
    font-family: var(--font-mono); font-size: 0.7rem;
    letter-spacing: 0.09em; text-transform: uppercase;
    color: var(--ink); margin: 0 0 0.8rem; font-weight: 500;
  }
  .foot-grid p { font-size: 0.84rem; color: var(--ink); margin: 0 0 0.5rem; line-height: 1.6; }
  .foot-grid a { color: var(--accent); text-decoration: none; }
  .foot-grid a:hover { text-decoration: underline; }
  .copyright {
    margin-top: 3rem; padding-top: 1.5rem;
    border-top: 1px solid var(--line);
    display: flex; flex-wrap: wrap; gap: 0.8rem 2rem;
    justify-content: space-between;
    font-family: var(--font-mono); font-size: 0.7rem;
    letter-spacing: 0.04em; color: var(--ink-faint);
  }
  .copyright a { color: var(--ink-soft); text-decoration: none; }
  .copyright a:hover { color: var(--accent); }
  .clock { color: var(--ink-soft); }
  .clock .tick { color: var(--accent); }

  /* ── reveal animation ───────────────────────── */
  .reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
  .reveal.in { opacity: 1; transform: none; }

  .hero-stagger > * { opacity: 0; transform: translateY(16px); animation: rise .8s cubic-bezier(.2,.7,.2,1) forwards; }
  .hero-stagger > *:nth-child(1) { animation-delay: .05s; }
  .hero-stagger > *:nth-child(2) { animation-delay: .14s; }
  .hero-stagger > *:nth-child(3) { animation-delay: .23s; }
  .hero-stagger > *:nth-child(4) { animation-delay: .32s; }
  .hero-stagger > *:nth-child(5) { animation-delay: .41s; }
  .hero-stagger > *:nth-child(6) { animation-delay: .50s; }
  .hero-stagger > *:nth-child(7) { animation-delay: .59s; }
  @keyframes rise { to { opacity: 1; transform: none; } }

  @media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .reveal { opacity: 1; transform: none; transition: none; }
    .hero-stagger > * { opacity: 1; transform: none; animation: none; }
    .scroll-progress { display: none; }
  }