@font-face {
  font-family: "DM Sans";
  src: url("assets/dm-sans.woff2") format("woff2");
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
}

@font-face {
  font-family: "Newsreader";
  src: url("assets/newsreader.woff2") format("woff2");
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
}

:root {
  --paper: #f8f6f0;
  --paper-deep: #f0ece3;
  --surface: #fffdf8;
  --surface-raised: #ffffff;
  --ink: #191814;
  --ink-soft: #383630;
  --muted: #716d65;
  --faint: #969087;
  --line: #ddd7cb;
  --line-strong: #cbc3b5;
  --accent: #8b312f;
  --accent-hover: #702522;
  --accent-soft: #f0dfd9;
  --accent-wash: #f7ebe6;
  --peach: #d88d69;
  --blue: #557b8f;
  --blue-soft: #dfe9ed;
  --violet: #6e5b8d;
  --violet-soft: #e7e2ee;
  --green: #557a69;
  --shadow-sm: 0 1px 2px rgba(32, 28, 20, 0.04), 0 8px 24px rgba(32, 28, 20, 0.04);
  --shadow-lg: 0 28px 80px rgba(33, 28, 20, 0.14);
  --sans: "DM Sans", "Inter", ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --serif: "Newsreader", "Iowan Old Style", "Baskerville", "Times New Roman", serif;
  --page: min(1180px, calc(100vw - 64px));
  --article: 700px;
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 28px;
}

html[data-theme="dark"] {
  --paper: #171714;
  --paper-deep: #1f1e1a;
  --surface: #201f1b;
  --surface-raised: #26241f;
  --ink: #f1eee6;
  --ink-soft: #d5d0c6;
  --muted: #aaa49a;
  --faint: #807a71;
  --line: #3b3832;
  --line-strong: #514c43;
  --accent: #d98677;
  --accent-hover: #ed9b8b;
  --accent-soft: #422b27;
  --accent-wash: #30231f;
  --peach: #e69c78;
  --blue: #8db4c5;
  --blue-soft: #26373e;
  --violet: #b1a0cf;
  --violet-soft: #332d3e;
  --green: #8ab5a0;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.22), 0 8px 24px rgba(0, 0, 0, 0.13);
  --shadow-lg: 0 28px 80px rgba(0, 0, 0, 0.42);
}

html[data-theme="dark"] .button-primary {
  color: #211411;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
  background: var(--paper);
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 5% 3%, rgba(139, 49, 47, 0.045), transparent 23rem),
    var(--paper);
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.64;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  transition: background-color 180ms ease, color 180ms ease;
}

::selection {
  color: var(--ink);
  background: var(--accent-soft);
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  color: inherit;
}

button,
input {
  font: inherit;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 10px;
  left: 10px;
  padding: 9px 14px;
  border-radius: 8px;
  color: #fff;
  background: var(--accent);
  font: 600 13px/1 var(--sans);
  text-decoration: none;
  transform: translateY(-150%);
  transition: transform 160ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.reading-progress {
  position: fixed;
  z-index: 200;
  inset: 0 0 auto;
  height: 2px;
  pointer-events: none;
}

.reading-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--accent);
  transform-origin: left;
}

.page-wide {
  width: var(--page);
  margin-right: auto;
  margin-left: auto;
}

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  border-bottom: 1px solid transparent;
  font-family: var(--sans);
  transition: background-color 180ms ease, border-color 180ms ease;
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  -webkit-backdrop-filter: blur(18px) saturate(1.2);
  backdrop-filter: blur(18px) saturate(1.2);
}

.site-nav {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  width: var(--page);
  min-height: 72px;
  margin: 0 auto;
}

.wordmark {
  display: inline-flex;
  gap: 9px;
  align-items: center;
  justify-self: start;
  width: max-content;
  color: var(--ink);
  font: 700 14px/1 var(--sans);
  letter-spacing: 0.12em;
  text-decoration: none;
}

.wordmark-mark {
  display: inline-grid;
  width: 27px;
  height: 27px;
  place-items: center;
  border: 1px solid var(--ink);
  border-radius: 50%;
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0;
}

.nav-center {
  display: flex;
  gap: 31px;
  align-items: center;
  font-size: 13px;
  font-weight: 550;
}

.nav-center a,
.nav-external {
  position: relative;
  color: var(--muted);
  text-decoration: none;
  transition: color 150ms ease;
}

.nav-center a::after {
  position: absolute;
  right: 0;
  bottom: -7px;
  left: 0;
  height: 1px;
  background: currentColor;
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 180ms ease;
}

.nav-center a:hover,
.nav-external:hover {
  color: var(--ink);
}

.nav-center a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-actions {
  display: flex;
  gap: 19px;
  align-items: center;
  justify-self: end;
}

.nav-external {
  display: inline-flex;
  gap: 5px;
  align-items: center;
  font-size: 13px;
  font-weight: 550;
}

.nav-external svg,
.button svg {
  width: 15px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.4;
}

.theme-toggle {
  display: grid;
  width: 34px;
  height: 34px;
  padding: 0;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--surface);
  cursor: pointer;
  transition: border-color 150ms ease, transform 150ms ease;
}

.theme-toggle:hover {
  border-color: var(--line-strong);
  transform: rotate(8deg);
}

.theme-toggle svg {
  width: 17px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.35;
}

.theme-toggle .sun-icon {
  display: none;
}

html[data-theme="dark"] .theme-toggle .sun-icon {
  display: block;
}

html[data-theme="dark"] .theme-toggle .moon-icon {
  display: none;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(430px, 0.92fr);
  gap: clamp(60px, 8vw, 120px);
  align-items: center;
  width: var(--page);
  min-height: min(800px, calc(100vh - 72px));
  margin: 0 auto;
  padding: 72px 0 80px;
}

.hero-copy {
  max-width: 660px;
}

.eyebrow,
.section-kicker,
.mini-kicker,
.closing-kicker {
  margin: 0;
  color: var(--accent);
  font: 650 12px/1.2 var(--sans);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.eyebrow {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 25px;
}

.eyebrow span {
  width: 24px;
  height: 1px;
  background: currentColor;
}

.hero h1 {
  max-width: 670px;
  margin: 0;
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(56px, 6.2vw, 88px);
  font-weight: 500;
  line-height: 0.93;
  letter-spacing: -0.047em;
}

.hero h1 em {
  color: var(--accent);
  font-weight: 400;
}

.hero-story-title {
  max-width: 600px;
  margin: 25px 0 0;
  color: var(--accent);
  font: 650 18px/1.3 var(--sans);
  letter-spacing: 0.01em;
}

.hero-dek {
  max-width: 600px;
  margin: 11px 0 0;
  color: var(--ink-soft);
  font-size: 23px;
  line-height: 1.42;
}

.byline {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-top: 24px;
  color: var(--muted);
  font: 500 13px/1 var(--sans);
}

.byline-separator {
  color: var(--line-strong);
}

.hero-actions,
.closing-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  justify-content: center;
  min-height: 45px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 999px;
  font: 600 13px/1 var(--sans);
  text-decoration: none;
  transition: background-color 150ms ease, color 150ms ease, border-color 150ms ease, transform 150ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  color: #fffaf5;
  background: var(--accent);
}

.button-primary:hover {
  background: var(--accent-hover);
}

.button-primary svg {
  width: 17px;
}

.button-secondary {
  border-color: var(--line-strong);
  color: var(--ink);
  background: var(--surface);
}

.button-secondary:hover {
  border-color: var(--ink);
}

.hero-lab {
  position: relative;
  overflow: hidden;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-lg);
  font-family: var(--sans);
}

.hero-lab::before {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(to right, rgba(92, 84, 72, 0.045) 1px, transparent 1px), linear-gradient(to bottom, rgba(92, 84, 72, 0.045) 1px, transparent 1px);
  background-size: 24px 24px;
  content: "";
  mask-image: linear-gradient(to bottom, black, transparent 90%);
}

.lab-header,
.lab-footer {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.live-dot {
  display: inline-flex;
  gap: 6px;
  align-items: center;
}

.live-dot i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--green) 13%, transparent);
}

.token-signal-matrix {
  --token-columns: repeat(8, minmax(0, 1fr));
  position: relative;
}

.token-strip {
  position: relative;
  display: grid;
  grid-template-columns: 83px minmax(0, 1fr);
  gap: 14px;
  align-items: center;
  min-height: 114px;
  padding: 28px 0 24px;
  border-bottom: 1px solid var(--line);
}

.token-row-label {
  color: var(--muted);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-align: right;
  text-transform: uppercase;
}

.token-track {
  display: grid;
  grid-template-columns: var(--token-columns);
  gap: 6px;
  align-items: center;
  padding: 0 5px;
}

.token {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
  width: 100%;
  height: 31px;
  padding: 0 3px;
  overflow: visible;
  border: 1px solid var(--line);
  border-radius: 7px;
  color: var(--ink-soft);
  background: var(--surface-raised);
  font-size: 11px;
  font-weight: 550;
  white-space: nowrap;
  box-shadow: 0 1px 0 rgba(35, 30, 22, 0.04);
}

.token-fork {
  border-color: color-mix(in srgb, var(--blue) 38%, var(--line));
  color: var(--blue);
  background: var(--blue-soft);
}

.token-tail {
  border-color: color-mix(in srgb, var(--peach) 42%, var(--line));
  color: var(--accent);
  background: var(--accent-wash);
}

.token-focus {
  position: relative;
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.token-focus::after {
  position: absolute;
  top: -15px;
  left: 50%;
  width: 1px;
  height: 10px;
  background: var(--accent);
  content: "";
}

.signal-grid {
  position: relative;
  display: grid;
  grid-template-columns: 83px minmax(0, 1fr);
  gap: 13px 14px;
  align-items: center;
  padding: 24px 0;
}

.signal-label {
  color: var(--muted);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-align: right;
  text-transform: uppercase;
}

.accent-label {
  color: var(--accent);
}

.signal-track {
  display: grid;
  grid-template-columns: var(--token-columns);
  gap: 6px;
  align-items: end;
  height: 32px;
  padding: 4px 5px 0;
  border-bottom: 1px solid var(--line);
}

.signal-track i {
  display: block;
  width: 65%;
  height: var(--value, 3px);
  min-height: 2px;
  justify-self: center;
  border-radius: 3px 3px 0 0;
  background: var(--blue);
  opacity: 0.5;
}

.signal-track i.low {
  background: var(--peach);
  opacity: 0.72;
}

.entropy-track i {
  background: var(--violet);
}

.signal-track i.focus {
  opacity: 1;
}

.opsa-track i {
  height: 2px;
  background: var(--line-strong);
  opacity: 0.5;
}

.opsa-track i.selected {
  height: var(--value);
  background: var(--accent);
  opacity: 0.65;
}

.opsa-track i.selected.focus {
  opacity: 1;
}

.lab-annotation {
  position: relative;
  display: grid;
  grid-template-columns: 38px 1fr;
  gap: 12px;
  align-items: start;
  margin: 2px 0 21px 96px;
  padding: 13px 15px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--accent-wash);
}

.lab-annotation svg {
  width: 34px;
  fill: none;
  stroke: var(--accent);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.2;
}

.lab-annotation p {
  margin: 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.45;
}

.lab-annotation strong {
  color: var(--ink);
}

.lab-footer {
  justify-content: flex-start;
  gap: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 10px;
  letter-spacing: 0.03em;
  text-transform: none;
}

.lab-footer span {
  display: flex;
  gap: 5px;
  align-items: center;
}

.legend-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.legend-dot.student {
  background: var(--blue);
}

.legend-dot.update {
  background: var(--accent);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  width: var(--page);
  margin: 0 auto 74px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.metric {
  display: flex;
  flex-direction: column;
  gap: 7px;
  min-height: 108px;
  padding: 23px clamp(20px, 3vw, 40px);
  justify-content: center;
}

.metric + .metric {
  border-left: 1px solid var(--line);
}

.metric-value {
  color: var(--accent);
  font-family: var(--serif);
  font-size: 39px;
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.03em;
}

.metric-label {
  color: var(--muted);
  font: 500 12px/1.35 var(--sans);
  letter-spacing: 0.035em;
  text-transform: uppercase;
}

figure {
  margin: 0;
}

.overview-figure,
.figure-wide {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.overview-figure {
  margin-bottom: 82px;
}

.zoom-trigger {
  position: relative;
  display: block;
  width: 100%;
  padding: 0;
  overflow: hidden;
  border: 0;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  background: #fff;
  cursor: zoom-in;
}

.zoom-trigger img {
  width: 100%;
}

.overview-figure .zoom-trigger {
  padding: clamp(16px, 2.6vw, 34px);
}

.zoom-hint {
  position: absolute;
  right: 14px;
  bottom: 14px;
  display: flex;
  gap: 6px;
  align-items: center;
  padding: 7px 10px;
  border: 1px solid rgba(255, 255, 255, 0.36);
  border-radius: 999px;
  color: #fff;
  background: rgba(26, 24, 21, 0.72);
  font: 550 11px/1 var(--sans);
  opacity: 0;
  transform: translateY(3px);
  transition: opacity 150ms ease, transform 150ms ease;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.zoom-hint svg {
  width: 13px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-width: 1.4;
}

.zoom-trigger:hover .zoom-hint,
.zoom-trigger:focus-visible .zoom-hint {
  opacity: 1;
  transform: translateY(0);
}

figcaption {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  padding: 15px 19px 17px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font: 400 14px/1.5 var(--sans);
}

figcaption span {
  color: var(--accent);
  font-weight: 650;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.summary-band {
  display: grid;
  grid-template-columns: 210px 1fr;
  gap: 36px;
  margin-bottom: 94px;
  padding: 34px 0;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.summary-kicker span {
  color: var(--accent);
  font: 650 11px/1 var(--sans);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.summary-kicker h2 {
  margin: 9px 0 0;
  font-family: var(--serif);
  font-size: 30px;
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: -0.025em;
}

.summary-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.summary-list li > span {
  display: block;
  margin-bottom: 13px;
  color: var(--accent);
  font: 600 11px/1 var(--sans);
}

.summary-list p {
  margin: 0;
  color: var(--muted);
  font: 400 14px/1.55 var(--sans);
}

.summary-list strong {
  color: var(--ink);
  font-weight: 620;
}

.article-shell {
  display: grid;
  grid-template-columns: 190px minmax(0, var(--article));
  gap: 72px;
  align-items: start;
  width: 962px;
  max-width: calc(100vw - 48px);
  margin: 0 auto;
}

.toc {
  position: sticky;
  top: 112px;
  padding-right: 24px;
  font-family: var(--sans);
  transform: translateX(-80px);
}

.toc > p {
  margin: 0 0 17px;
  color: var(--faint);
  font-size: 11px;
  font-weight: 650;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.toc ol {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.toc a {
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 6px;
  align-items: center;
  padding: 7px 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.3;
  text-decoration: none;
  transition: color 150ms ease, transform 150ms ease;
}

.toc a span {
  color: var(--faint);
  font-size: 10px;
  transition: color 150ms ease;
}

.toc a:hover {
  color: var(--ink);
}

.toc a.is-active {
  color: var(--accent);
  font-weight: 620;
  transform: translateX(4px);
}

.toc a.is-active span {
  color: var(--accent);
}

.toc-progress {
  width: 100%;
  height: 1px;
  margin-top: 22px;
  overflow: hidden;
  background: var(--line);
}

.toc-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--accent);
}

.article-body {
  min-width: 0;
}

.article-section {
  scroll-margin-top: 88px;
  margin-bottom: 82px;
}

.article-section + .article-section {
  padding-top: 76px;
  border-top: 1px solid var(--line);
}

.section-heading {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 18px;
  align-items: start;
  margin-bottom: 30px;
}

.section-number {
  display: grid;
  width: 34px;
  height: 34px;
  margin-top: 2px;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  color: var(--accent);
  font: 650 11px/1 var(--sans);
}

.section-heading h2 {
  max-width: 650px;
  margin: 8px 0 0;
  font-family: var(--serif);
  font-size: clamp(39px, 4vw, 52px);
  font-weight: 500;
  line-height: 1.01;
  letter-spacing: -0.038em;
}

.article-body > section > p,
.article-body section > p {
  color: var(--ink-soft);
}

.article-body p {
  margin: 0 0 1.25em;
}

.article-body .lead {
  margin-bottom: 1.15em;
  color: var(--ink);
  font-size: 23px;
  line-height: 1.49;
}

.article-body em {
  color: var(--ink);
}

.definition-card {
  position: relative;
  margin: 28px 0 34px;
  padding: 22px 26px 21px 29px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: var(--surface);
}

.definition-label,
.finding-index,
.mechanism-label,
.result-benchmark,
.boundary-list article > span {
  color: var(--accent);
  font: 650 11px/1.2 var(--sans);
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.definition-card p {
  margin: 8px 0 0;
  color: var(--ink-soft);
  font-size: 17px;
  line-height: 1.55;
}

.figure-wide {
  width: min(980px, calc(100vw - 48px));
  margin: 36px 0 36px 50%;
  transform: translateX(-50%);
}

.figure-wide .zoom-trigger {
  padding: clamp(10px, 1.8vw, 22px);
}

.pull-quote {
  position: relative;
  width: min(820px, calc(100vw - 48px));
  margin: 60px 0 0 50%;
  padding: 40px 52px 38px;
  border: 0;
  border-top: 1px solid var(--accent);
  border-bottom: 1px solid var(--accent);
  color: var(--ink);
  text-align: center;
  transform: translateX(-50%);
}

.pull-quote::before {
  position: absolute;
  top: -19px;
  left: 50%;
  width: 38px;
  color: var(--accent);
  background: var(--paper);
  content: "“";
  font-family: var(--serif);
  font-size: 46px;
  line-height: 1;
  transform: translateX(-50%);
}

.pull-quote p {
  margin: 0;
  font-size: 29px;
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.finding-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  width: min(900px, calc(100vw - 48px));
  margin: 42px 0 48px 50%;
  transform: translateX(-50%);
}

.finding-card {
  display: flex;
  flex-direction: column;
  min-height: 330px;
  padding: 29px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.finding-card-accent {
  background: var(--accent-wash);
}

.finding-card h3 {
  margin: 14px 0 11px;
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 520;
  line-height: 1.08;
  letter-spacing: -0.025em;
}

.finding-card > p {
  margin: 0 0 25px;
  color: var(--muted);
  font: 400 14px/1.55 var(--sans);
}

.finding-card > strong {
  display: flex;
  gap: 10px;
  align-items: baseline;
  margin-top: auto;
  color: var(--accent);
  font: 600 28px/1 var(--serif);
}

.finding-card > strong small {
  max-width: 150px;
  color: var(--muted);
  font: 500 10px/1.25 var(--sans);
}

.equation-block {
  width: min(820px, calc(100vw - 48px));
  margin: 44px 0 48px 50%;
  padding: 27px 31px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
  transform: translateX(-50%);
}

.equation-label {
  color: var(--accent);
  font: 650 10px/1.2 var(--sans);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.compact-equation {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px 30px;
  align-items: center;
}

.compact-equation p {
  grid-column: 1 / -1;
  margin: 0;
  overflow-x: auto;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 31px;
  line-height: 1.25;
  white-space: nowrap;
}

.equation-note {
  grid-column: 2;
  grid-row: 1;
  color: var(--muted);
  font: 500 10px/1.2 var(--sans);
}

.control-explainer {
  margin-top: -4px;
}

.control-explainer strong {
  color: var(--ink);
  white-space: nowrap;
}

.sign-comparison {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  width: min(860px, calc(100vw - 48px));
  margin: 31px 0 28px 50%;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
  transform: translateX(-50%);
}

.sign-comparison article {
  min-height: 224px;
  padding: 27px 29px 29px;
  border-top: 3px solid var(--green);
  background: var(--surface);
}

.sign-comparison article + article {
  border-left: 1px solid var(--line);
}

.sign-comparison .positive-control {
  border-top-color: var(--accent);
  background: var(--accent-wash);
}

.sign-comparison article > span {
  color: var(--green);
  font: 650 10px/1.2 var(--sans);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.sign-comparison .positive-control > span {
  color: var(--accent);
}

.sign-comparison h3 {
  margin: 18px 0 11px;
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 520;
  line-height: 1.06;
  letter-spacing: -0.025em;
}

.article-body .sign-comparison p {
  margin: 0;
  color: var(--muted);
  font: 400 14px/1.55 var(--sans);
}

.control-conclusion {
  font-size: 20px;
  line-height: 1.55;
}

.thesis-card {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 20px;
  width: min(820px, calc(100vw - 48px));
  margin: 58px 0 0 50%;
  padding: 29px 32px;
  border: 1px solid var(--accent);
  border-radius: var(--radius-md);
  background: var(--accent-wash);
  transform: translateX(-50%);
}

.thesis-icon {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border-radius: 50%;
  color: #fffaf5;
  background: var(--accent);
  font-family: var(--sans);
  line-height: 1;
}

.thesis-card p {
  margin: 0;
  color: var(--ink);
  font-size: 20px;
  line-height: 1.46;
}

.thesis-card .thesis-label {
  margin-bottom: 6px;
  color: var(--accent);
  font: 650 11px/1.2 var(--sans);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.method-steps {
  display: grid;
  gap: 0;
  width: min(850px, calc(100vw - 48px));
  margin: 44px 0 48px 50%;
  border-top: 1px solid var(--line);
  transform: translateX(-50%);
}

.method-steps article {
  display: grid;
  grid-template-columns: 46px 145px 1fr;
  gap: 18px;
  align-items: baseline;
  padding: 21px 0;
  border-bottom: 1px solid var(--line);
}

.method-steps article > span {
  color: var(--accent);
  font: 600 12px/1 var(--sans);
}

.method-steps h3 {
  margin: 0;
  font: 650 15px/1.2 var(--sans);
}

.method-steps p {
  margin: 0;
  color: var(--muted);
  font: 400 13px/1.5 var(--sans);
}

.main-equation {
  padding: 28px 34px 32px;
}

.equation-topline {
  display: flex;
  gap: 20px;
  align-items: center;
  justify-content: space-between;
  color: var(--muted);
  font: 500 10px/1.2 var(--sans);
}

.equation-formula {
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: center;
  margin: 37px 0 34px !important;
  overflow-x: auto;
  color: var(--ink) !important;
  font-size: 35px;
  line-height: 1.3;
  white-space: nowrap;
}

.fraction {
  display: inline-grid;
  grid-template-rows: auto auto;
  align-items: center;
  min-width: 24px;
  font-size: 0.72em;
  line-height: 1.05;
  text-align: center;
  vertical-align: middle;
}

.equation-symbol {
  position: relative;
  display: inline-block;
  padding-right: 0.72em;
}

.equation-symbol sub,
.equation-symbol sup {
  position: absolute;
  left: 0.92em;
  font-size: 0.48em;
  line-height: 1;
}

.equation-symbol sub {
  bottom: 0.03em;
}

.equation-symbol sup {
  top: 0.03em;
}

.fraction > span:first-child {
  padding: 0 5px 3px;
  border-bottom: 1px solid currentColor;
}

.fraction > span:last-child {
  padding: 3px 5px 0;
}

.wide-fraction {
  min-width: 240px;
}

.advantage-scale {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 13px;
  align-items: center;
  color: var(--muted);
  font: 500 9px/1.2 var(--sans);
  text-transform: uppercase;
}

.advantage-scale span {
  display: flex;
  gap: 5px;
  align-items: baseline;
}

.advantage-scale strong {
  color: var(--ink);
  font-size: 11px;
}

.advantage-scale > i {
  position: relative;
  display: block;
  height: 6px;
  overflow: hidden;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent-soft), var(--accent));
}

.advantage-scale > i b {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 4px;
  height: 12px;
  border-radius: 99px;
  background: var(--ink);
  transform: translate(-50%, -50%);
}

.main-equation .equation-footnote {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font: 400 10px/1.45 var(--sans);
}

.mechanism-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  width: min(980px, calc(100vw - 48px));
  margin: 43px 0 52px 50%;
  transform: translateX(-50%);
}

.mechanism-grid article {
  padding: 18px 18px 21px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.mechanism-visual {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  grid-template-rows: 42px 17px 42px;
  gap: 0 5px;
  align-items: end;
  height: 125px;
  margin-bottom: 21px;
  padding: 10px 13px;
  border-radius: 11px;
  background: var(--paper-deep);
}

.mechanism-visual i {
  display: block;
  height: var(--h);
  min-height: 2px;
  border-radius: 3px 3px 0 0;
  background: var(--blue);
  opacity: 0.6;
}

.mechanism-visual i:nth-of-type(n + 6) {
  grid-row: 3;
}

.mechanism-visual span {
  grid-column: 1 / -1;
  grid-row: 2;
  align-self: center;
  color: var(--muted);
  font: 500 12px/1 var(--sans);
  text-align: center;
}

.mechanism-visual i.target {
  background: var(--accent);
  opacity: 0.92;
}

.mechanism-visual i.after {
  opacity: 0.48;
}

.keep-visual i:nth-of-type(n + 6) {
  opacity: 0.6;
}

.mechanism-grid h3 {
  min-height: 50px;
  margin: 10px 0 8px;
  font-family: var(--serif);
  font-size: 23px;
  font-weight: 520;
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.mechanism-grid article > p {
  margin: 0;
  color: var(--muted);
  font: 400 14px/1.5 var(--sans);
}

.result-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  width: min(900px, calc(100vw - 48px));
  margin: 43px 0 34px 50%;
  transform: translateX(-50%);
}

.result-cards article {
  padding: 23px 22px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.result-cards article > div {
  display: flex;
  gap: 8px;
  align-items: center;
  margin: 15px 0 8px;
  color: var(--ink);
  font-family: var(--serif);
}

.result-cards strong {
  font-size: 28px;
  font-weight: 550;
  line-height: 1;
}

.result-cards strong:last-child {
  color: var(--accent);
}

.result-cards i {
  color: var(--faint);
  font: 400 15px/1 var(--sans);
}

.result-cards p {
  margin: 0;
  color: var(--muted);
  font: 500 12px/1.35 var(--sans);
}

.metric-guide {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  min-width: 740px;
  border-bottom: 1px solid var(--line);
  background: var(--paper-deep);
  font-family: var(--sans);
}

.metric-guide > span {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: center;
  padding: 14px 19px;
}

.metric-guide > span + span {
  border-left: 1px solid var(--line);
}

.metric-guide strong {
  color: var(--blue);
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
}

.metric-guide > span:last-child strong {
  color: var(--accent);
}

.metric-guide small {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.35;
}

.table-wrap {
  width: min(900px, calc(100vw - 48px));
  margin: 0 0 46px 50%;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
  transform: translateX(-50%);
}

table {
  width: 100%;
  min-width: 740px;
  table-layout: fixed;
  border-collapse: collapse;
  font-family: var(--sans);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

col.model-column {
  width: 16%;
}

col.metric-column {
  width: 14%;
}

caption {
  padding: 16px 19px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-align: left;
  text-transform: uppercase;
}

th,
td {
  padding: 11px 15px;
  border-bottom: 1px solid var(--line);
  text-align: right;
}

thead th {
  color: var(--muted);
  font-size: 11px;
  font-weight: 650;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

thead tr:first-child th {
  padding-top: 15px;
  padding-bottom: 6px;
  border-bottom: 0;
}

thead tr:last-child th {
  padding-top: 6px;
  padding-bottom: 10px;
}

thead tr:last-child .metric-header {
  color: var(--ink);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: none;
}

thead tr:last-child .avg-header {
  color: var(--blue);
}

thead tr:last-child .pass-header {
  color: var(--accent);
}

thead tr:first-child > th:first-child,
tbody th {
  text-align: left;
}

tbody th {
  color: var(--ink);
  font-weight: 600;
}

.model-group-row th {
  padding-top: 13px;
  padding-bottom: 8px;
  border-top: 1px solid var(--line);
  border-bottom: 0;
  color: var(--muted);
  font-size: 11px;
  font-weight: 650;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

tbody:first-of-type .model-group-row th {
  border-top: 0;
}

tbody tr:last-child th,
tbody tr:last-child td {
  border-bottom: 0;
}

.highlight-row {
  color: var(--ink);
  background: var(--accent-wash);
}

.highlight-row th {
  color: var(--accent);
}

.delta-row {
  color: var(--accent);
  font-weight: 600;
}

.evidence-split {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  width: min(850px, calc(100vw - 48px));
  margin: 55px 0 48px 50%;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  transform: translateX(-50%);
}

.evidence-split > div {
  padding: 30px 31px 28px 0;
}

.evidence-split > div + div {
  padding-right: 0;
  padding-left: 31px;
  border-left: 1px solid var(--line);
}

.evidence-split h3 {
  margin: 10px 0 11px;
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 520;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.evidence-split div > p:last-child {
  margin: 0;
  color: var(--muted);
  font: 400 13px/1.55 var(--sans);
}

.boundary-list {
  width: min(850px, calc(100vw - 48px));
  margin: 42px 0 48px 50%;
  border-top: 1px solid var(--line);
  transform: translateX(-50%);
}

.boundary-list article {
  display: grid;
  grid-template-columns: 115px 220px 1fr;
  gap: 24px;
  align-items: baseline;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.boundary-list h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 520;
  line-height: 1.15;
  letter-spacing: -0.018em;
}

.boundary-list p {
  margin: 0;
  color: var(--muted);
  font: 400 13px/1.52 var(--sans);
}

.closing-card {
  position: relative;
  width: min(900px, calc(100vw - 48px));
  margin: 0 0 0 50%;
  padding: clamp(34px, 5vw, 54px);
  overflow: hidden;
  border-radius: var(--radius-lg);
  color: #fff9f3;
  background: #762b29;
  transform: translateX(-50%);
}

.closing-card::after {
  position: absolute;
  right: -100px;
  bottom: -130px;
  width: 340px;
  height: 340px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 50%;
  box-shadow: 0 0 0 50px rgba(255, 255, 255, 0.035), 0 0 0 100px rgba(255, 255, 255, 0.025);
  content: "";
}

.closing-card > * {
  position: relative;
  z-index: 1;
}

.closing-card .closing-kicker {
  color: #edc2b3;
}

.closing-card h2 {
  max-width: 720px;
  margin: 12px 0 14px;
  font-family: var(--serif);
  font-size: clamp(40px, 5vw, 58px);
  font-weight: 500;
  line-height: 0.98;
  letter-spacing: -0.04em;
}

.closing-card > p:not(.closing-kicker) {
  max-width: 620px;
  margin: 0;
  color: rgba(255, 249, 243, 0.77);
  font: 400 17px/1.55 var(--sans);
}

.closing-card .button-primary {
  color: #762b29;
  background: #fff9f3;
}

.closing-card .button-primary:hover {
  background: #f1ded5;
}

.closing-card .button-secondary {
  border-color: rgba(255, 255, 255, 0.35);
  color: #fff9f3;
  background: transparent;
}

.closing-card .button-secondary:hover {
  border-color: #fff9f3;
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 20px;
  align-items: center;
  margin-top: 40px;
  padding: 44px 0 52px;
  border-top: 1px solid var(--line);
  font-family: var(--sans);
}

.site-footer p {
  margin: 0;
  color: var(--muted);
  font-size: 11px;
}

.site-footer > div {
  display: flex;
  gap: 20px;
  justify-self: end;
}

.site-footer > div a {
  color: var(--muted);
  font-size: 11px;
  text-decoration: none;
}

.site-footer > div a:hover {
  color: var(--ink);
}

.image-dialog {
  width: min(96vw, 1500px);
  max-width: none;
  height: min(94vh, 1000px);
  max-height: none;
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  color: var(--ink);
  background: var(--surface);
  box-shadow: var(--shadow-lg);
}

.image-dialog::backdrop {
  background: rgba(19, 17, 14, 0.76);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.image-dialog form {
  position: absolute;
  z-index: 2;
  top: 14px;
  right: 14px;
}

.image-dialog form button {
  display: grid;
  width: 38px;
  height: 38px;
  padding: 0;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
}

.image-dialog form svg {
  width: 17px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-width: 1.5;
}

.dialog-inner {
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  width: 100%;
  height: 100%;
}

.dialog-inner img {
  align-self: center;
  justify-self: center;
  max-width: 100%;
  max-height: calc(94vh - 70px);
  object-fit: contain;
  background: #fff;
}

.dialog-inner p {
  margin: 0;
  padding: 14px 70px 17px 20px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font: 400 12px/1.45 var(--sans);
}

.reveal-ready .reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 600ms cubic-bezier(0.2, 0.75, 0.25, 1), transform 600ms cubic-bezier(0.2, 0.75, 0.25, 1);
}

.reveal-ready .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1120px) {
  :root {
    --page: min(1000px, calc(100vw - 48px));
  }

  .hero {
    grid-template-columns: minmax(0, 1fr) minmax(390px, 0.78fr);
    gap: 50px;
  }

  .hero h1 {
    font-size: clamp(55px, 6.7vw, 76px);
  }

  .article-shell {
    grid-template-columns: 165px minmax(0, var(--article));
    gap: 50px;
    width: 915px;
  }

  .toc {
    transform: translateX(-30px);
  }

  .figure-wide,
  .finding-grid,
  .sign-comparison,
  .result-cards,
  .table-wrap {
    width: min(850px, calc(100vw - 48px));
  }
}

@media (max-width: 920px) {
  :root {
    --page: calc(100vw - 42px);
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 92px 0 82px;
  }

  .hero-copy {
    max-width: 760px;
  }

  .hero h1 {
    max-width: 760px;
    font-size: clamp(58px, 10vw, 82px);
  }

  .hero-lab {
    width: min(620px, 100%);
    justify-self: center;
  }

  .summary-band {
    grid-template-columns: 170px 1fr;
    gap: 30px;
  }

  .article-shell {
    display: block;
    width: var(--article);
    max-width: calc(100vw - 42px);
  }

  .toc {
    display: none;
  }

  .site-footer {
    grid-template-columns: 1fr auto;
  }

  .site-footer > p {
    display: none;
  }
}

@media (max-width: 720px) {
  :root {
    --page: calc(100vw - 32px);
  }

  body {
    font-size: 18px;
  }

  .site-nav {
    grid-template-columns: 1fr auto;
    min-height: 64px;
  }

  .nav-center {
    display: none;
  }

  .hero {
    padding: 68px 0 68px;
  }

  .hero h1 {
    font-size: clamp(49px, 13.8vw, 70px);
  }

  .hero-dek {
    font-size: 21px;
  }

  .hero-metrics {
    margin-bottom: 56px;
  }

  .metric {
    min-height: 112px;
    padding: 22px 16px;
  }

  .metric-value {
    font-size: 32px;
  }

  .metric-label {
    font-size: 11px;
  }

  .overview-figure {
    margin-bottom: 64px;
  }

  .summary-band {
    grid-template-columns: 1fr;
    gap: 27px;
    margin-bottom: 72px;
  }

  .summary-list {
    gap: 20px;
  }

  .article-shell {
    max-width: calc(100vw - 32px);
  }

  .article-section {
    margin-bottom: 70px;
  }

  .article-section + .article-section {
    padding-top: 64px;
  }

  .section-heading h2 {
    font-size: 42px;
  }

  .article-body .lead {
    font-size: 21px;
  }

  .finding-grid,
  .sign-comparison,
  .mechanism-grid,
  .result-cards {
    grid-template-columns: 1fr;
  }

  .finding-card,
  .sign-comparison article {
    min-height: 0;
  }

  .sign-comparison article + article {
    border-left: 0;
  }

  .mechanism-grid article {
    padding: 20px;
  }

  .mechanism-grid h3 {
    min-height: 0;
  }

  .method-steps article {
    grid-template-columns: 35px 110px 1fr;
    gap: 12px;
  }

  .boundary-list article {
    grid-template-columns: 90px 1fr;
    gap: 10px 20px;
  }

  .boundary-list p {
    grid-column: 2;
  }

  .site-footer {
    grid-template-columns: 1fr;
    gap: 25px;
  }

  .site-footer > div {
    justify-self: start;
  }
}

@media (max-width: 540px) {
  :root {
    --page: calc(100vw - 24px);
  }

  body {
    background: var(--paper);
  }

  .nav-external {
    display: none;
  }

  .hero {
    padding-top: 54px;
  }

  .eyebrow {
    margin-bottom: 20px;
  }

  .hero h1 {
    font-size: clamp(45px, 13.8vw, 61px);
    line-height: 0.96;
  }

  .hero-story-title {
    font-size: 16px;
  }

  .hero-dek {
    margin-top: 10px;
    font-size: 19px;
  }

  .hero-actions,
  .closing-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .hero-lab {
    padding: 17px;
    border-radius: 21px;
  }

  .token-signal-matrix {
    overflow-x: auto;
    overscroll-behavior-inline: contain;
    scrollbar-width: thin;
  }

  .token-strip,
  .signal-grid {
    min-width: 440px;
  }

  .token-strip {
    grid-template-columns: 67px minmax(0, 1fr);
    gap: 8px;
    min-height: 110px;
  }

  .token-track,
  .signal-track {
    gap: 3px;
  }

  .token-row-label,
  .signal-label {
    font-size: 9px;
  }

  .lab-annotation {
    margin-left: 0;
  }

  .hero-metrics {
    grid-template-columns: 1fr;
  }

  .metric {
    display: grid;
    grid-template-columns: 105px 1fr;
    gap: 18px;
    align-items: center;
    min-height: 82px;
    padding: 17px 14px;
  }

  .metric + .metric {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .metric-label {
    font-size: 11px;
  }

  .overview-figure,
  .figure-wide {
    width: calc(100vw - 24px);
    border-radius: 12px;
  }

  .zoom-trigger {
    border-radius: 12px 12px 0 0;
  }

  .zoom-hint {
    display: flex;
    gap: 0;
    padding: 6px;
    font-size: 0;
    opacity: 0.86;
    transform: none;
  }

  figcaption {
    display: block;
    padding: 13px 14px 15px;
    font-size: 13px;
  }

  figcaption span {
    display: block;
    margin-bottom: 4px;
  }

  .summary-band {
    width: calc(100vw - 24px);
  }

  .summary-list {
    grid-template-columns: 1fr;
  }

  .summary-list li {
    display: grid;
    grid-template-columns: 32px 1fr;
    gap: 8px;
  }

  .summary-list li > span {
    margin: 4px 0 0;
  }

  .article-shell {
    max-width: calc(100vw - 28px);
  }

  .section-heading {
    grid-template-columns: 34px 1fr;
    gap: 12px;
  }

  .section-number {
    width: 30px;
    height: 30px;
  }

  .section-heading h2 {
    font-size: 37px;
  }

  .article-body .lead {
    font-size: 20px;
  }

  .definition-card {
    padding: 21px 20px;
  }

  .pull-quote,
  .finding-grid,
  .sign-comparison,
  .equation-block,
  .thesis-card,
  .method-steps,
  .mechanism-grid,
  .result-cards,
  .table-wrap,
  .evidence-split,
  .boundary-list,
  .closing-card {
    width: calc(100vw - 28px);
  }

  .pull-quote {
    padding: 34px 18px 30px;
  }

  .pull-quote p {
    font-size: 25px;
  }

  .compact-equation {
    display: block;
    padding: 22px 18px;
  }

  .compact-equation p {
    margin: 15px 0 9px;
    font-size: 25px;
  }

  .equation-note {
    display: block;
  }

  .sign-comparison article {
    padding: 24px 20px;
  }

  .thesis-card {
    grid-template-columns: 38px 1fr;
    gap: 14px;
    padding: 24px 20px;
  }

  .thesis-icon {
    width: 36px;
    height: 36px;
  }

  .thesis-card p {
    font-size: 18px;
  }

  .method-steps article {
    grid-template-columns: 28px 1fr;
  }

  .method-steps article > p {
    grid-column: 2;
  }

  .method-steps p {
    margin-top: 6px;
  }

  .main-equation {
    padding: 23px 18px 26px;
  }

  .equation-topline {
    align-items: flex-start;
    flex-direction: column;
    gap: 5px;
  }

  .equation-formula {
    justify-content: flex-start;
    gap: 5px;
    margin: 28px 0 !important;
    overflow-x: visible;
    font-size: 22px;
  }

  .wide-fraction {
    min-width: 150px;
  }

  .advantage-scale {
    grid-template-columns: 1fr;
  }

  .advantage-scale > i {
    grid-row: 2;
  }

  .advantage-scale span:last-child {
    justify-self: end;
  }

  .evidence-split {
    grid-template-columns: 1fr;
  }

  .evidence-split > div,
  .evidence-split > div + div {
    padding: 26px 0;
    border-left: 0;
  }

  .evidence-split > div + div {
    border-top: 1px solid var(--line);
  }

  .boundary-list article {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .boundary-list p {
    grid-column: 1;
  }

  .closing-card {
    padding: 36px 24px 30px;
    border-radius: 21px;
  }

  .site-footer {
    width: calc(100vw - 24px);
  }

  .site-footer > div {
    flex-wrap: wrap;
    gap: 12px 18px;
  }

  .image-dialog {
    width: calc(100vw - 16px);
    height: auto;
    max-height: calc(100vh - 16px);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal-ready .reveal {
    opacity: 1;
    transform: none;
  }
}

@media print {
  :root {
    --paper: #fff;
    --surface: #fff;
    --ink: #111;
    --ink-soft: #222;
    --muted: #555;
  }

  .site-header,
  .reading-progress,
  .toc,
  .theme-toggle,
  .zoom-hint,
  .hero-actions,
  .closing-actions,
  .site-footer {
    display: none !important;
  }

  .reveal {
    opacity: 1 !important;
    transform: none !important;
  }

  body {
    background: #fff;
  }

  .hero {
    min-height: 0;
  }

  .article-shell {
    display: block;
    width: 100%;
  }

  .article-section {
    break-inside: auto;
  }

  .figure-wide,
  .finding-grid,
  .sign-comparison,
  .equation-block,
  .mechanism-grid,
  .result-cards,
  .table-wrap {
    width: 100%;
  }
}