@font-face {
  font-family: "Sora";
  src: url("../../assets/fonts/sora-var.woff2") format("woff2");
  font-display: swap;
  font-weight: 300 800;
}

@font-face {
  font-family: "Manrope";
  src: url("../../assets/fonts/manrope-var.woff2") format("woff2");
  font-display: swap;
  font-weight: 300 800;
}

:root {
  color-scheme: dark light;
  --chrome: #07080b;
  --chrome-raised: #101218;
  --chrome-text: #f5f6f8;
  --chrome-soft: #b0b4bf;
  --chrome-muted: #777c89;
  --chrome-line: rgba(255, 255, 255, .11);
  --chrome-line-strong: rgba(255, 255, 255, .19);
  --accent: #ec1038;
  --accent-bright: #ff244a;
  --accent-soft: rgba(236, 16, 56, .1);
  --paper: #f4f5f8;
  --paper-raised: #fbfbfd;
  --paper-soft: #eceef3;
  --paper-line: #dfe1e8;
  --paper-rule: #d2d5de;
  --ink: #0b0d12;
  --body: #303541;
  --muted: #676e7c;
  --manual: #8a909e;
  --green: #0f8a5f;
  --radius: 16px;
  --display: "Sora", system-ui, sans-serif;
  --sans: "Manrope", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  background: var(--chrome);
  color: var(--chrome-text);
  font-family: var(--sans);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; }
img, canvas { display: block; max-width: 100%; }
button, select { font: inherit; }
[hidden] { display: none !important; }
::selection { color: #fff; background: rgba(236, 16, 56, .58); }

.skip-link {
  position: fixed;
  z-index: 50;
  top: 12px;
  left: 12px;
  transform: translateY(-160%);
  border-radius: 10px;
  padding: 10px 14px;
  color: var(--chrome);
  background: var(--chrome-text);
  font-weight: 750;
  text-decoration: none;
}
.skip-link:focus { transform: translateY(0); }

.research-chrome {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  min-height: 100dvh;
  background:
    radial-gradient(ellipse 58% 52% at 88% -8%, rgba(255, 36, 74, .38) 0%, rgba(255, 36, 74, .08) 48%, transparent 76%),
    radial-gradient(ellipse 54% 42% at 8% 105%, rgba(66, 223, 146, .08) 0%, transparent 70%),
    linear-gradient(180deg, #07080b 0%, #12070c 58%, #07080b 100%);
}

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  padding: 14px 0 12px;
  background: linear-gradient(180deg, rgba(7, 8, 11, .94) 0%, rgba(7, 8, 11, .74) 65%, transparent 100%);
}
.nav-shell {
  width: min(1180px, calc(100% - 30px));
  height: 64px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  margin: 0 auto;
  padding: 0 20px;
  border: 1px solid var(--chrome-line);
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(19, 21, 28, .92), rgba(10, 11, 16, .88));
  box-shadow: 0 18px 52px rgba(0, 0, 0, .42), inset 0 1px 0 rgba(255, 255, 255, .05);
  backdrop-filter: blur(18px);
}
.brand {
  width: max-content;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-family: var(--display);
  font-size: 1.04rem;
  font-weight: 700;
  letter-spacing: -.02em;
  text-decoration: none;
  white-space: nowrap;
}
.brand img { width: 34px; height: 24px; object-fit: contain; }
.primary-nav { display: flex; align-items: center; justify-content: center; gap: 25px; white-space: nowrap; }
.primary-nav a {
  position: relative;
  padding: 10px 0;
  color: var(--chrome-soft);
  font-size: .86rem;
  font-weight: 650;
  text-decoration: none;
  transition: color .18s ease;
}
.primary-nav a:hover, .primary-nav a:focus-visible, .primary-nav .nav-current { color: #fff; }
.primary-nav .nav-current::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 2px;
  left: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--accent-bright);
}
.nav-action {
  justify-self: end;
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  padding: 0 17px;
  color: #fff;
  background: linear-gradient(160deg, var(--accent-bright), #b4001f);
  box-shadow: 0 10px 28px rgba(255, 36, 74, .25);
  font-size: .84rem;
  font-weight: 750;
  text-decoration: none;
  white-space: nowrap;
  transition: transform .18s ease, box-shadow .18s ease;
}
.nav-action:hover { transform: translateY(-1px); box-shadow: 0 14px 34px rgba(255, 36, 74, .36); }
.nav-action:active { transform: translateY(1px); }

.report-masthead {
  width: min(1380px, calc(100% - 64px));
  margin: 0 auto;
  padding: 32px 0 72px;
}
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 40px;
  color: var(--chrome-muted);
  font-size: .84rem;
  font-weight: 700;
  text-decoration: none;
  transition: color .18s ease;
}
.back-link:hover { color: #fff; }
.masthead-panel {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(440px, 1.1fr);
  align-items: center;
  gap: clamp(42px, 6vw, 86px);
  padding: clamp(34px, 4.5vw, 58px);
  border: 1px solid var(--chrome-line-strong);
  border-radius: 28px;
  background: rgba(255, 255, 255, .04);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .12), 0 40px 90px rgba(0, 0, 0, .5);
  backdrop-filter: blur(30px) saturate(150%);
}
.report-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-bottom: 22px;
  color: var(--chrome-muted);
  font-size: .71rem;
  font-weight: 750;
  letter-spacing: .11em;
  text-transform: uppercase;
}
.report-type {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  border-radius: 10px;
  padding: 0 12px;
  color: #fff;
  background: var(--accent-bright);
}
.masthead-copy h1 {
  max-width: 10ch;
  margin: 0 0 20px;
  color: #fff;
  font-family: var(--display);
  font-size: clamp(2.7rem, 5.2vw, 5.2rem);
  font-weight: 710;
  letter-spacing: -.052em;
  line-height: .98;
  text-wrap: balance;
}
.standfirst {
  max-width: 55ch;
  margin: 0;
  color: var(--chrome-soft);
  font-size: clamp(1.05rem, 1.6vw, 1.2rem);
  line-height: 1.58;
}
.tested-line {
  width: max-content;
  max-width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 26px 0 0;
  border: 1px solid rgba(66, 223, 146, .3);
  border-radius: 10px;
  padding: 9px 14px;
  color: #9df0c4;
  background: rgba(66, 223, 146, .08);
  font-size: .78rem;
}
.tested-line strong { color: #d9fbe9; }
.byline {
  display: flex;
  align-items: center;
  gap: 13px;
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid var(--chrome-line);
}
.byline-mark {
  width: 42px;
  height: 42px;
  flex: none;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  background: linear-gradient(160deg, var(--accent-bright), #b4001f);
  font-family: var(--display);
  font-size: .8rem;
  font-weight: 800;
}
.byline > span:last-child { display: grid; gap: 2px; }
.byline strong { color: #fff; font-size: .88rem; }
.byline small { color: var(--chrome-muted); font-size: .78rem; }

.headline-figure {
  margin: 0;
  border: 1px solid var(--chrome-line);
  border-radius: var(--radius);
  padding: clamp(24px, 3.4vw, 38px);
  background: rgba(8, 9, 13, .74);
  box-shadow: 0 20px 52px rgba(0, 0, 0, .25), inset 0 1px 0 rgba(255, 255, 255, .045);
}
.headline-figure figcaption { margin-bottom: 30px; color: var(--chrome-soft); font-size: .87rem; font-weight: 700; }
.headline-comparison { display: grid; gap: 30px; }
.comparison-group { display: grid; gap: 16px; }
.comparison-group-label {
  color: var(--chrome-muted);
  font-size: .66rem;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.comparison-row div { display: flex; align-items: baseline; justify-content: space-between; gap: 18px; margin-bottom: 8px; }
.comparison-row span { color: var(--chrome-soft); font-size: .82rem; }
.comparison-row strong { color: #fff; font-family: var(--display); font-size: 1.08rem; font-variant-numeric: tabular-nums; }
.comparison-row i { width: var(--bar); min-width: 7px; height: 9px; display: block; border-radius: 2px; }
.manual-row i { background: var(--manual); }
.watchpeak-row i { background: var(--accent-bright); }
.figure-result { display: flex; align-items: flex-end; gap: 18px; margin: 38px 0 0; padding-top: 28px; border-top: 1px solid var(--chrome-line); }
.figure-result strong { flex: none; color: #fff; font-family: var(--display); font-size: clamp(2.8rem, 5.5vw, 5.4rem); letter-spacing: -.065em; line-height: .85; }
.figure-result span { max-width: 23ch; color: var(--chrome-soft); font-size: .88rem; line-height: 1.45; }
.figure-note { margin: 24px 0 0; color: var(--chrome-muted); font-size: .73rem; }

.paper { color: var(--body); background: var(--paper); }
.paper-shell { width: min(1380px, calc(100% - 64px)); margin: 0 auto; padding-bottom: 128px; }
.citation-strip {
  min-height: 112px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr)) auto;
  align-items: stretch;
  border-bottom: 1px solid var(--paper-rule);
}
.citation-strip div { display: flex; flex-direction: column; justify-content: center; gap: 3px; padding: 20px 24px; border-left: 1px solid var(--paper-rule); }
.citation-strip div:first-child { border-left: 0; padding-left: 0; }
.citation-strip span { color: var(--muted); font-size: .66rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.citation-strip strong { color: var(--ink); font-size: .84rem; }
.citation-strip > a {
  align-self: center;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--accent);
  border-radius: 10px;
  padding: 0 15px;
  color: #fff;
  background: var(--accent);
  font-size: .8rem;
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
}
.citation-strip > a:active { transform: translateY(1px); }

.paper-grid {
  display: grid;
  grid-template-columns: minmax(0, 820px) 248px;
  justify-content: center;
  align-items: start;
  gap: clamp(64px, 9vw, 118px);
  padding-top: 82px;
}
.paper-body { min-width: 0; font-size: 1.06rem; line-height: 1.76; }
.paper-body section { scroll-margin-top: 92px; }
.paper-body section + section { margin-top: 86px; }
.paper-body p { margin: 0 0 26px; }
.paper-body h2 {
  margin: 0 0 28px;
  padding-top: 22px;
  border-top: 2px solid var(--ink);
  color: var(--ink);
  font-family: var(--display);
  font-size: clamp(1.65rem, 3vw, 2.35rem);
  font-weight: 710;
  letter-spacing: -.034em;
  line-height: 1.16;
  text-wrap: balance;
}
.paper-body h3 {
  margin: 40px 0 14px;
  color: var(--ink);
  font-family: var(--display);
  font-size: 1.04rem;
  letter-spacing: -.01em;
}
.paper-body strong { color: #151821; }
.paper-body a { color: var(--accent); text-underline-offset: 3px; }
.abstract {
  border-top: 0;
  border-left: 3px solid var(--accent);
  padding: 0 0 2px 26px;
}
.abstract h2 { border-top: 0; padding-top: 0; font-size: 1.22rem; letter-spacing: -.01em; }
.abstract p { margin-bottom: 15px; }
.abstract p:last-child { margin-bottom: 0; }
.plain-callout {
  margin: 36px 0;
  border: 1px solid var(--paper-line);
  border-left: 3px solid var(--accent);
  border-radius: 4px;
  padding: 23px 26px;
  background: var(--paper-raised);
}
.plain-callout > strong { display: block; margin-bottom: 7px; font-family: var(--display); font-size: .9rem; }
.plain-callout p { margin: 0; font-size: 1rem; }

.finding-grid {
  display: grid;
  grid-template-columns: 1.08fr .92fr;
  gap: 12px;
  margin: 34px 0 20px;
}
.finding-grid article {
  min-height: 210px;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--paper-line);
  border-radius: var(--radius);
  padding: 25px;
  background: var(--paper-raised);
}
.finding-grid .finding-primary { border-color: rgba(236, 16, 56, .32); background: var(--accent-soft); }
.finding-grid article > strong { color: var(--ink); font-family: var(--display); font-size: clamp(2rem, 4vw, 3.35rem); letter-spacing: -.055em; line-height: 1; font-variant-numeric: tabular-nums; }
.finding-grid article > span { margin-top: 10px; color: var(--ink); font-size: .82rem; font-weight: 800; }
.finding-grid article p { margin: auto 0 0; padding-top: 26px; color: var(--muted); font-size: .86rem; line-height: 1.55; }
.interpretation-note { color: var(--muted); font-size: .82rem; }

.method-figure { margin: 34px 0 42px; }
.timeline-diagram { border: 1px solid var(--paper-line); border-radius: var(--radius); padding: clamp(24px, 4vw, 42px); background: var(--paper-raised); }
.timeline-label { margin: 14px 0 7px; color: var(--muted); font-size: .72rem; font-weight: 750; }
.timeline-track { position: relative; height: 20px; overflow: hidden; border-radius: 4px; background: var(--paper-soft); }
.timeline-track span { position: absolute; top: 7px; left: var(--start); width: var(--width); height: 6px; border-radius: 2px; background: var(--accent); }
.timeline-track b { position: absolute; top: 1px; left: var(--at); width: 2px; height: 18px; background: var(--ink); }
.offset-mark { position: relative; width: 31%; margin: 18px 0 0 52%; border-top: 1px solid var(--accent); color: var(--muted); font-size: .68rem; text-align: center; }
.offset-mark::before, .offset-mark::after { content: ""; position: absolute; top: -6px; width: 1px; height: 6px; background: var(--accent); }
.offset-mark::before { left: 0; }
.offset-mark::after { right: 0; }
.offset-mark span { display: block; padding-top: 8px; }
.method-figure figcaption, .results-figure figcaption { margin-top: 11px; color: var(--muted); font-size: .75rem; line-height: 1.55; }
.condition-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 28px 0 34px;
}
.condition-grid div { min-height: 110px; display: flex; flex-direction: column; justify-content: space-between; border: 1px solid var(--paper-line); border-radius: 10px; padding: 18px 20px; background: var(--paper-raised); }
.condition-grid span { color: var(--accent); font-size: .68rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.condition-grid strong { margin-top: 18px; font-size: .88rem; line-height: 1.45; }

.result-controls {
  display: grid;
  grid-template-columns: minmax(180px, .8fr) minmax(220px, 1fr) auto;
  align-items: end;
  gap: 12px;
  margin: 30px 0 16px;
}
.result-controls label { display: grid; gap: 7px; color: var(--muted); font-size: .72rem; font-weight: 800; }
.result-controls select {
  min-height: 45px;
  width: 100%;
  border: 1px solid var(--paper-rule);
  border-radius: 9px;
  padding: 0 36px 0 12px;
  color: var(--ink);
  background: var(--paper-raised);
}
.data-status {
  min-height: 45px;
  display: inline-flex;
  align-items: center;
  border: 1px solid rgba(15, 138, 95, .26);
  border-radius: 9px;
  padding: 0 12px;
  color: #0b7651;
  background: rgba(15, 138, 95, .07);
  font-size: .72rem;
  font-weight: 800;
  white-space: nowrap;
}
.results-figure { margin: 0 0 26px; border: 1px solid var(--paper-line); border-radius: var(--radius); padding: 24px; background: var(--paper-raised); }
.chart-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; margin-bottom: 16px; }
.chart-heading > div:first-child { display: grid; gap: 2px; }
.chart-heading strong { color: var(--ink); font-family: var(--display); font-size: .92rem; }
.chart-heading span { color: var(--muted); font-size: .7rem; }
#hero-chart { width: 100%; height: auto; aspect-ratio: 1.9; }
.chart-key { display: flex; flex-wrap: wrap; gap: 14px; }
.chart-key span { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); }
.chart-key i { width: 18px; height: 3px; display: inline-block; border-radius: 1px; }
.key-manual { background: var(--manual); }
.key-watchpeak { background: var(--accent); }
.results-state, .results-error { margin: 16px 0; border-radius: 9px; padding: 16px 18px; font-size: .86rem; }
.results-state { color: var(--muted); background: var(--paper-soft); }
.results-error { border: 1px solid rgba(236, 16, 56, .3); color: #742038; background: var(--accent-soft); }
.results-error p { margin: 5px 0 0; }
.result-summary { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 0 0 16px; }
.summary-block { min-height: 130px; display: flex; flex-direction: column; justify-content: space-between; border: 1px solid var(--paper-line); border-radius: 10px; padding: 20px; background: var(--paper-raised); }
.summary-block.accent { border-color: rgba(236, 16, 56, .3); background: var(--accent-soft); }
.summary-block strong { font-family: var(--display); font-size: clamp(1.8rem, 4vw, 3.1rem); letter-spacing: -.055em; line-height: 1; }
.summary-block span { margin-top: 16px; color: var(--muted); font-size: .78rem; line-height: 1.45; }
.table-wrap { overflow-x: auto; border: 1px solid var(--paper-line); border-radius: 10px; background: var(--paper-raised); -webkit-overflow-scrolling: touch; }
table { width: 100%; min-width: 760px; border-collapse: collapse; font-size: .82rem; }
caption { padding: 15px 17px; color: var(--body); font-weight: 800; text-align: left; }
th, td { padding: 12px 16px; border-top: 1px solid #e7e9ee; text-align: left; }
th { color: var(--muted); background: var(--paper-soft); font-size: .64rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
td { color: var(--body); font-variant-numeric: tabular-nums; }
td strong { color: var(--ink); }

.tail-comparison { display: grid; grid-template-columns: .82fr 1.18fr; gap: 12px; margin: 32px 0; }
.tail-comparison div { min-height: 210px; display: flex; flex-direction: column; border: 1px solid var(--paper-line); border-radius: var(--radius); padding: 24px; background: var(--paper-raised); }
.tail-comparison div:last-child { border-color: rgba(236, 16, 56, .25); }
.tail-comparison span { color: var(--muted); font-size: .76rem; font-weight: 800; }
.tail-comparison strong { margin-top: 12px; font-family: var(--display); font-size: clamp(2.3rem, 5vw, 4.1rem); letter-spacing: -.06em; line-height: 1; }
.tail-comparison p { margin: auto 0 0; padding-top: 28px; color: var(--muted); font-size: .84rem; line-height: 1.55; }

.limitations-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 0;
  padding: 0;
}
.limitations-list li { border: 1px solid var(--paper-line); border-radius: 10px; padding: 20px; background: var(--paper-raised); font-size: .9rem; line-height: 1.6; }
.limitations-list strong { display: block; margin-bottom: 4px; }

.materials-list { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 30px 0; }
.materials-list a {
  min-height: 108px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border: 1px solid var(--paper-line);
  border-radius: 10px;
  padding: 19px;
  color: var(--body);
  background: var(--paper-raised);
  text-decoration: none;
  transition: border-color .18s ease, transform .18s ease;
}
.materials-list a:hover { border-color: var(--accent); transform: translateY(-2px); }
.materials-list span { display: grid; gap: 4px; }
.materials-list strong { font-size: .87rem; }
.materials-list small { color: var(--muted); font-size: .73rem; line-height: 1.4; }
.materials-list b { color: var(--accent); font-size: .65rem; letter-spacing: .08em; text-transform: uppercase; }
.reproduction-code { display: grid; gap: 10px; border-radius: 10px; padding: 20px; color: #d8dbe3; background: #111319; }
.reproduction-code span { color: #a9aeba; font-size: .72rem; font-weight: 800; }
.reproduction-code code { overflow-x: auto; color: #f1f2f5; font: .8rem/1.8 ui-monospace, SFMono-Regular, Menlo, monospace; white-space: nowrap; }

.disclosure-list { margin: 0; }
.disclosure-list div { display: grid; grid-template-columns: 140px 1fr; gap: 24px; padding: 17px 0; border-bottom: 1px solid var(--paper-line); }
.disclosure-list div:first-child { border-top: 1px solid var(--paper-line); }
.disclosure-list dt { color: var(--ink); font-size: .78rem; font-weight: 800; }
.disclosure-list dd { margin: 0; color: var(--body); font-size: .9rem; }
.citation-box { margin-top: 34px; border: 1px solid var(--paper-line); border-left: 3px solid var(--accent); border-radius: 4px; padding: 23px 26px; background: var(--paper-raised); }
.citation-box > strong { display: block; margin-bottom: 8px; font-family: var(--display); font-size: .88rem; }
.citation-box p { margin: 0; color: var(--body); font-size: .9rem; }

.paper-rail { position: sticky; top: 94px; display: grid; gap: 22px; }
.table-of-contents { display: grid; border-left: 2px solid var(--paper-rule); padding-left: 17px; }
.table-of-contents > span { padding-bottom: 11px; color: var(--accent); font-size: .66rem; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
.table-of-contents a { padding: 6px 0; color: var(--muted); font-size: .8rem; font-weight: 650; line-height: 1.35; text-decoration: none; transition: color .18s ease; }
.table-of-contents a:hover, .table-of-contents a:focus-visible { color: var(--accent); }
.rail-summary { border-radius: 12px; padding: 19px; background: #e8eaf0; }
.rail-summary strong { color: #252a35; font-size: .72rem; }
.rail-summary p { margin: 8px 0 0; color: #444b59; font-size: .8rem; line-height: 1.55; }

.site-footer { border-top: 1px solid var(--chrome-line); background: var(--chrome); }
.footer-shell { width: min(1180px, calc(100% - 40px)); min-height: 84px; display: flex; align-items: center; justify-content: space-between; gap: 28px; margin: 0 auto; }
.footer-shell p { margin: 0; color: var(--chrome-muted); font-size: .82rem; }
.footer-shell nav { display: flex; align-items: center; gap: 24px; }
.footer-shell a { color: var(--chrome-soft); font-size: .82rem; text-decoration: none; }
.footer-shell a:hover { color: #fff; }

:focus-visible { outline: 2px solid var(--accent-bright); outline-offset: 3px; }

@media (prefers-color-scheme: light) {
  .result-controls select { color-scheme: light; }
}

@media (max-width: 1100px) {
  .primary-nav a:nth-child(-n+2) { display: none; }
  .masthead-panel { grid-template-columns: minmax(0, .92fr) minmax(390px, 1.08fr); }
  .citation-strip { grid-template-columns: repeat(2, 1fr) auto; }
  .citation-strip div:nth-child(3) { border-left: 0; }
  .paper-grid { grid-template-columns: minmax(0, 820px); }
  .paper-rail { display: none; }
}

@media (max-width: 820px) {
  .nav-shell { grid-template-columns: 1fr auto; }
  .primary-nav { display: none; }
  .masthead-panel { grid-template-columns: 1fr; }
  .masthead-copy h1 { max-width: 14ch; }
  .citation-strip { grid-template-columns: 1fr 1fr; padding: 16px 0 24px; }
  .citation-strip div { border-left: 0; border-bottom: 1px solid var(--paper-rule); padding-left: 0; }
  .citation-strip > a { margin-top: 12px; }
  .result-controls { grid-template-columns: 1fr 1fr; }
  .data-status { grid-column: 1 / -1; justify-content: center; }
}

@media (max-width: 620px) {
  .site-header { padding-top: 10px; }
  .nav-shell { width: min(100% - 20px, 1180px); height: 58px; padding: 0 14px; }
  .brand span { display: none; }
  .nav-action { min-height: 38px; padding: 0 13px; }
  .report-masthead { width: min(100% - 28px, 1380px); padding: 24px 0 44px; }
  .back-link { margin-bottom: 24px; }
  .masthead-panel { gap: 34px; padding: 24px; border-radius: 20px; }
  .report-meta { gap: 8px 12px; }
  .masthead-copy h1 { font-size: clamp(2.6rem, 13vw, 4rem); }
  .standfirst { font-size: 1rem; }
  .tested-line { align-items: flex-start; flex-direction: column; gap: 1px; }
  .figure-result { align-items: flex-start; flex-direction: column; }
  .paper-shell { width: min(100% - 36px, 1380px); padding-bottom: 88px; }
  .citation-strip { grid-template-columns: 1fr; }
  .citation-strip div { min-height: 78px; }
  .paper-grid { padding-top: 56px; }
  .paper-body { font-size: 1rem; }
  .paper-body section + section { margin-top: 68px; }
  .paper-body h2 { font-size: 1.65rem; }
  .abstract { padding-left: 18px; }
  .finding-grid, .condition-grid, .result-controls, .result-summary, .tail-comparison, .limitations-list, .materials-list { grid-template-columns: 1fr; }
  .data-status { grid-column: auto; }
  .finding-grid article { min-height: 190px; }
  .offset-mark { width: 43%; margin-left: 47%; }
  .chart-heading { display: grid; }
  #hero-chart { min-width: 0; aspect-ratio: 1.35; }
  .disclosure-list div { grid-template-columns: 1fr; gap: 4px; }
  .footer-shell { align-items: flex-start; flex-direction: column; padding: 24px 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media print {
  .site-header, .back-link, .paper-rail, .result-controls, .site-footer { display: none; }
  .research-chrome, .paper, body { color: #000; background: #fff; }
  .report-masthead, .paper-shell { width: 100%; padding: 0; }
  .masthead-panel { display: block; border: 0; box-shadow: none; padding: 0 0 32px; }
  .masthead-copy h1, .standfirst, .byline strong, .headline-figure figcaption, .comparison-group-label, .comparison-row strong, .comparison-row span, .figure-result strong, .figure-result span, .figure-note { color: #000; }
  .headline-figure { break-inside: avoid; margin-top: 28px; border-color: #bbb; background: #fff; box-shadow: none; }
  .citation-strip { break-inside: avoid; }
  .paper-grid { display: block; padding-top: 34px; }
  .paper-body section { break-inside: auto; }
  .materials-list a { break-inside: avoid; }
}