:root {
  --ink: #111;
  --muted: #5b5b5b;
  --line: #c9c9c9;
  --soft-line: #e6e6e6;
  --paper: #fff;
  --ground: #f4f4f2;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font-family: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  font-size: 17px;
  line-height: 1.68;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

a:hover,
a:focus-visible {
  text-decoration-thickness: 2px;
}

.site-header {
  width: min(100% - 3rem, 1060px);
  margin: 0 auto;
  padding: 1.25rem 0;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 2rem;
  border-bottom: 1px solid var(--ink);
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-header a {
  text-decoration: none;
}

.wordmark {
  font-weight: 700;
}

nav {
  display: flex;
  gap: 1.5rem;
}

.paper {
  width: min(100% - 3rem, 860px);
  margin: 0 auto;
  padding: 5rem 0 6rem;
}

.paper-header {
  padding-bottom: 3.5rem;
  border-bottom: 1px solid var(--ink);
}

.paper-type,
.metadata,
.links,
figcaption,
.finding-list p,
footer {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

.paper-type {
  margin: 0 0 1.4rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
p {
  text-wrap: pretty;
}

h1 {
  max-width: 820px;
  margin: 0;
  font-size: clamp(3rem, 8vw, 5.8rem);
  font-weight: 400;
  letter-spacing: -0.045em;
  line-height: 0.98;
}

.subtitle {
  max-width: 680px;
  margin: 1.75rem 0 0;
  color: #303030;
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  line-height: 1.45;
}

.metadata {
  margin: 2.4rem 0 0;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.55;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem 1.4rem;
  margin: 1.4rem 0 0;
  font-size: 0.82rem;
}

section {
  padding: 3.7rem 0;
  border-bottom: 1px solid var(--line);
}

section > p {
  max-width: 720px;
}

.abstract {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 2rem;
}

.abstract h2,
.abstract p {
  margin-top: 0;
}

h2 {
  margin: 0 0 1.5rem;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

h2 span {
  display: inline-block;
  width: 2rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.abstract h2 {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.abstract p {
  font-size: 1.08rem;
}

h3 {
  margin: 3rem 0 1rem;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.4;
  text-transform: uppercase;
}

.contents {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--line);
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 0.78rem;
}

.contents p {
  margin: 0 0 0.55rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.contents ol {
  margin: 0;
  padding-left: 1.2rem;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.2rem 2rem;
}

.question {
  max-width: 780px;
  margin: 0 0 2rem;
  font-size: clamp(1.35rem, 2.8vw, 1.8rem);
  line-height: 1.4;
}

.pipeline {
  margin: 2.3rem 0;
  padding: 1rem 0;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  overflow-x: auto;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 0.72rem;
  white-space: nowrap;
}

.pipeline span {
  font-weight: 600;
}

.pipeline b {
  color: var(--muted);
  font-weight: 400;
}

.summary-grid {
  margin: 2.5rem 0 3rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--ink);
}

.summary-grid div {
  padding: 1rem 0.8rem 1rem 0;
  border-bottom: 1px solid var(--soft-line);
}

.summary-grid dt {
  font-size: 1.35rem;
  font-variant-numeric: tabular-nums;
}

.summary-grid dd {
  margin: 0.2rem 0 0;
  color: var(--muted);
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 0.74rem;
  line-height: 1.4;
}

.prose-list {
  max-width: 740px;
  padding-left: 1.35rem;
}

.prose-list li {
  margin: 0.6rem 0;
  padding-left: 0.3rem;
}

.table-wrap {
  width: 100%;
  margin: 1.8rem 0 2.4rem;
  overflow-x: auto;
  border-top: 1px solid var(--ink);
}

table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 0.75rem;
  line-height: 1.45;
  font-variant-numeric: tabular-nums;
}

th,
td {
  padding: 0.72rem 0.7rem 0.72rem 0;
  border-bottom: 1px solid var(--soft-line);
  text-align: left;
  vertical-align: top;
}

th {
  font-weight: 700;
}

tfoot th {
  border-bottom-color: var(--ink);
}

.note {
  margin: 2rem 0;
  padding: 0.9rem 0 0.9rem 1rem;
  border-left: 2px solid var(--ink);
  color: #333;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 0.8rem;
  line-height: 1.55;
}

.definition-list {
  margin: 1.8rem 0 0;
  border-top: 1px solid var(--ink);
}

.definition-list div {
  display: grid;
  grid-template-columns: 155px 1fr;
  gap: 1.5rem;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--soft-line);
}

.definition-list dt {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 0.76rem;
  font-weight: 700;
}

.definition-list dd {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.55;
}

.equation {
  max-width: 520px;
}

.equation-wide {
  max-width: none;
}

.process-list,
.takeaways {
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
  counter-reset: item;
  border-top: 1px solid var(--ink);
}

.process-list li,
.takeaways li {
  counter-increment: item;
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--soft-line);
}

.process-list li::before,
.takeaways li::before {
  content: counter(item, decimal-leading-zero);
  color: var(--muted);
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 0.72rem;
  font-variant-numeric: tabular-nums;
}

.process-list strong,
.takeaways strong {
  font-weight: 600;
}

.process-list p,
.takeaways p {
  margin: 0.2rem 0 0;
  color: #333;
  font-size: 0.95rem;
  line-height: 1.55;
}

.finding-list {
  margin: 2.5rem 0 3.5rem;
  border-top: 1px solid var(--ink);
}

.finding-list > div {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 2rem;
  align-items: baseline;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--soft-line);
}

.finding-list strong {
  font-size: 1.25rem;
  font-weight: 400;
  font-variant-numeric: tabular-nums;
}

.finding-list p {
  margin: 0;
  color: #333;
  font-size: 0.86rem;
  line-height: 1.5;
}

figure {
  margin: 3rem 0;
}

figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--soft-line);
}

figcaption {
  max-width: 760px;
  margin-top: 0.85rem;
  color: var(--muted);
  font-size: 0.76rem;
  line-height: 1.5;
}

figcaption span {
  color: var(--ink);
  font-weight: 600;
}

.artifacts {
  border-bottom-color: var(--ink);
}

pre {
  margin: 1.75rem 0;
  padding: 1rem 1.2rem;
  overflow-x: auto;
  border: 1px solid var(--line);
  background: #fafafa;
  font-size: 0.82rem;
  line-height: 1.4;
}

footer {
  width: min(100% - 3rem, 1060px);
  margin: 0 auto;
  padding: 1.5rem 0 3rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--muted);
  font-size: 0.7rem;
}

footer p {
  margin: 0;
}

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }

  .site-header {
    width: min(100% - 2rem, 1060px);
  }

  nav {
    display: none;
  }

  .paper {
    width: min(100% - 2rem, 860px);
    padding: 3.5rem 0 4rem;
  }

  .paper-header {
    padding-bottom: 2.7rem;
  }

  .abstract {
    grid-template-columns: 1fr;
    gap: 0.7rem;
  }

  .contents ol {
    grid-template-columns: 1fr;
  }

  section {
    padding: 2.8rem 0;
  }

  .summary-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .definition-list div {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }

  .finding-list > div {
    grid-template-columns: 105px 1fr;
    gap: 1rem;
  }

  footer {
    width: min(100% - 2rem, 1060px);
    flex-direction: column;
  }
}