:root {
  --text: #202124;
  --muted: #5f6368;
  --link: #245da8;
  --line: #e2e5e9;
  --background: #ffffff;
  --soft: #f7f8fa;
  --content: 920px;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --serif: Georgia, "Times New Roman", serif;
  --mono: "SFMono-Regular", Consolas, monospace;
  --navy: #191970;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background: var(--background);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
img { display: block; max-width: 100%; height: auto; }

.skip-link {
  position: fixed;
  top: -4rem;
  left: 1rem;
  z-index: 10;
  padding: .55rem .8rem;
  color: #fff;
  background: #202124;
}
.skip-link:focus { top: 1rem; }

.site-header,
.site-footer,
.home-main,
.project-main {
  width: min(var(--content), calc(100% - 2.5rem));
  margin: 0 auto;
}

.site-header {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}

.site-name,
.wordmark {
  color: var(--text);
  font-weight: 650;
}

.wordmark-dot { display: none; }
.site-header nav { display: flex; gap: 1.4rem; }
.site-header nav a { color: var(--muted); font-size: .9rem; }

.home-main { padding: 4.7rem 0 5.5rem; }
.intro { max-width: 720px; }
.intro h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  font-weight: 500;
  line-height: 1.15;
}
.intro .role { margin: .35rem 0 1.35rem; color: var(--muted); }
.intro > p:not(.role):not(.affiliation):not(.profile-links) { font-size: 1.08rem; }
.affiliation { margin-top: 1.2rem; color: var(--muted); font-size: .92rem; }
.profile-links,
.publication-links { display: flex; flex-wrap: wrap; gap: 1rem; }
.profile-links { margin-top: 1.25rem; font-size: .92rem; }

.home-section { margin-top: 5rem; }
.home-section > h2 {
  margin: 0 0 1.6rem;
  padding-bottom: .55rem;
  border-bottom: 1px solid var(--line);
  font-size: 1.25rem;
  font-weight: 650;
}

.publication {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 1rem;
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--line);
}
.publication:first-child { padding-top: 0; }
.publication:last-child { border-bottom: 0; }
.publication-year { padding-top: .12rem; color: var(--muted); font-size: .86rem; }
.publication h3 { margin: 0; font-size: 1.08rem; line-height: 1.45; }
.publication p { margin: .55rem 0; }
.publication-authors,
.publication-venue { font-size: .9rem; }
.publication-venue { color: var(--muted); font-style: italic; }
.publication-links { margin-top: .75rem; font-size: .9rem; }
.interests p { color: var(--muted); }

.site-footer {
  padding: 1.5rem 0 2.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .82rem;
}
.site-footer div { display: flex; gap: 1rem; }

/* Classic academic homepage */
.classic-header,
.classic-main,
.classic-footer {
  width: min(1000px, calc(100% - 2.5rem));
  margin: 0 auto;
  font-family: Georgia, "Times New Roman", serif;
}

.classic-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 2rem;
  padding: 1.55rem 0 .65rem;
  border-bottom: 3px double #b8b8b8;
}

.classic-header h1 {
  margin: 0;
  color: var(--navy);
  font-size: 1.95rem;
  font-weight: 500;
}

.classic-header nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.15rem;
  font-size: .92rem;
}

.classic-header a,
.classic-main a,
.classic-footer a {
  color: #224b8d;
}

.classic-main {
  padding: 2rem 0 3rem;
  font-size: 15.5px;
  line-height: 1.52;
}

.profile-block {
  display: grid;
  grid-template-columns: 210px minmax(0, 1fr);
  gap: 2.2rem;
  align-items: center;
  margin-bottom: 2.25rem;
}

.profile-photo {
  width: 210px;
  height: 258px;
  object-fit: cover;
  object-position: center 35%;
  border: 1px solid #c7c7c7;
}

.profile-copy h2 {
  margin: 0 0 1.1rem;
  padding: 0;
  border: 0;
  color: var(--navy);
  font-size: 1.65rem;
  font-weight: 500;
}

.profile-copy h2 span {
  display: block;
  margin-top: .2rem;
  font-size: 1.1rem;
  font-weight: 400;
}

.profile-copy p {
  margin: .55rem 0;
}

.profile-copy .profile-links {
  display: flex;
  gap: .9rem;
  margin-top: 1rem;
}

.classic-section {
  margin-top: 1.65rem;
}

.classic-section > h2 {
  margin: 0 0 .65rem;
  padding-bottom: .18rem;
  border-bottom: 1px solid #b8b8b8;
  color: var(--navy);
  font-size: 1.28rem;
  font-weight: 500;
}

.classic-section p {
  margin: .45rem 0;
}

.interest-list {
  margin: .4rem 0 0 1.25rem;
  padding: 0;
}

.classic-publications {
  margin: .3rem 0 0 1.25rem;
  padding: 0;
}

.classic-publications > li {
  margin: 0 0 1.05rem;
  padding-left: .15rem;
}

.classic-publications h3 {
  margin: 0 0 .25rem;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.4;
}

.classic-publications p {
  margin: .16rem 0;
}

.equal-contribution {
  margin-top: .25rem;
  font-style: italic;
}

.classic-footer {
  padding: .8rem 0 2rem;
  border-top: 1px solid #b8b8b8;
  color: #666;
  font-size: .8rem;
  text-align: right;
}

/* Paper project page */
.project-page .site-header { position: static; transform: none; color: var(--text); }
.project-page .site-header nav a { color: var(--muted); }
.project-main { padding-bottom: 5rem; }

.project-hero {
  width: min(var(--content), calc(100% - 2.5rem));
  margin: 0 auto;
  padding: 3.5rem 0 4rem;
  color: var(--text);
  background: none;
}
.project-hero::after { display: none; }
.project-hero > * { position: static; }
.back-link { display: inline-block; margin-bottom: 2.5rem; color: var(--muted); font-size: .9rem; }
.project-badge { margin-bottom: .8rem; color: var(--muted); font-size: .78rem; font-weight: 600; text-transform: uppercase; letter-spacing: .08em; }
.project-hero h1 {
  max-width: 820px;
  margin: 0;
  color: var(--text);
  font-family: var(--serif);
  font-size: clamp(2.6rem, 7vw, 4.7rem);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -.025em;
}
.project-hero h1 em { color: inherit; font-style: normal; }
.paper-title { max-width: 790px; margin: 1.25rem 0 0; color: var(--text); font-size: 1.18rem; line-height: 1.5; }
.authors { margin: 1.5rem 0 .25rem; color: var(--muted); font-size: .92rem; }
.institutions { margin: 0; color: var(--muted); font-size: .86rem; }
.link-row { display: flex; flex-wrap: wrap; align-items: center; gap: .85rem; margin-top: 1.7rem; }
.button {
  display: inline-flex;
  min-height: 39px;
  padding: .42rem .8rem;
  align-items: center;
  border: 1px solid #bbc1c9;
  border-radius: 4px;
  color: var(--text);
  background: #fff;
  font-size: .88rem;
  font-weight: 550;
}
.button:hover { border-color: var(--link); color: var(--link); text-decoration: none; }
.button-primary { color: #fff; background: var(--link); border-color: var(--link); }
.button-primary:hover { color: #fff; background: #174a88; }
.text-link { font-size: .9rem; }
.hero-figure { margin: 3rem 0 0; padding: 0; background: #fff; border: 1px solid var(--line); border-radius: 3px; box-shadow: none; }
.hero-figure img { width: 100%; }
.hero-figure figcaption { padding: .65rem .85rem; border-top: 1px solid var(--line); color: var(--muted); font-size: .8rem; }

.section-narrow,
.project-section {
  width: min(var(--content), calc(100% - 2.5rem));
  margin: 0 auto;
  padding: 4rem 0;
  border-top: 1px solid var(--line);
}
.section-narrow > p { max-width: 780px; }
.section-narrow .lead { margin-top: 0; color: var(--text); font-family: var(--serif); font-size: 1.65rem; line-height: 1.45; }
.paper-abstract h2 { margin: 0 0 1.25rem; font-family: var(--serif); font-size: 2rem; font-weight: 500; }
.abstract-text { max-width: 820px; }
.abstract-text p { margin: 0 0 1rem; line-height: 1.75; }
.paper-keywords { margin: 1.5rem 0 0; color: var(--muted); font-size: .88rem; line-height: 1.65; }
.claim-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.3rem; margin-top: 2.5rem; }
.claim-grid > div { padding: 1.25rem; background: var(--soft); border-radius: 3px; }
.claim-number { color: var(--muted); font-family: var(--mono); font-size: .75rem; }
.claim-grid h2 { margin: .75rem 0 .35rem; font-size: 1.05rem; }
.claim-grid p { margin: 0; color: var(--muted); font-size: .9rem; }

.project-section-label { margin-bottom: 2rem; color: var(--muted); font-size: .78rem; font-weight: 650; letter-spacing: .08em; text-transform: uppercase; }
.project-section-label span { margin-right: .65rem; }
.method-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 4rem; }
.method-intro { position: static; }
.kicker { margin: 0 0 .6rem; color: var(--muted); font-size: .78rem; font-weight: 650; text-transform: uppercase; letter-spacing: .07em; }
.method-intro h2,
.results-heading h2 { margin: 0; font-family: var(--serif); font-size: 2rem; font-weight: 500; line-height: 1.25; }
.method-intro > p:last-child,
.results-heading > p { color: var(--muted); }
.stage-list { border-top: 1px solid var(--line); }
.stage-list article { padding: 1.5rem 0; border-bottom: 1px solid var(--line); }
.stage-marker { display: inline-block; color: var(--link); font-size: .78rem; font-weight: 650; }
.stage-list h3 { margin: .4rem 0 .25rem; font-size: 1.05rem; }
.stage-list p { margin: 0; color: var(--muted); font-size: .94rem; }

.results-section { width: 100%; max-width: none; padding-left: max(1.25rem, calc((100vw - var(--content)) / 2)); padding-right: max(1.25rem, calc((100vw - var(--content)) / 2)); color: var(--text); background: var(--soft); }
.results-heading { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: end; }
.result-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-top: 2rem; }
.result-card { padding: 1.3rem; background: #fff; border: 1px solid var(--line); border-radius: 3px; }
.result-dataset { color: var(--muted); font-size: .78rem; font-weight: 650; }
.result-values { display: flex; align-items: baseline; gap: .65rem; margin: .65rem 0; font-family: var(--mono); font-size: clamp(1.7rem, 4vw, 2.5rem); }
.result-values i { color: var(--muted); font-style: normal; }
.result-values strong { color: var(--link); }
.result-card p { margin: .4rem 0; color: var(--muted); font-size: .88rem; }
.result-gain { color: var(--text); font-size: .82rem; font-weight: 600; }
.evidence-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 1rem; }
.evidence-grid figure { margin: 0; padding: .75rem; background: #fff; border: 1px solid var(--line); border-radius: 3px; }
.evidence-grid img { width: 100%; aspect-ratio: 1.45; object-fit: contain; }
.evidence-grid figcaption { margin-top: .6rem; color: var(--muted); font-size: .8rem; }
.result-note { color: var(--muted); font-size: .8rem; }

.resource-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 2rem; }
.resource-grid a { position: relative; padding: 1rem 1.5rem 1rem 0; border-bottom: 1px solid var(--line); }
.resource-grid a span { display: block; color: var(--muted); font-size: .75rem; }
.resource-grid a strong { font-size: .95rem; font-weight: 550; }
.resource-grid a i { position: absolute; right: 0; top: 50%; color: var(--muted); font-style: normal; transform: translateY(-50%); }

.citation-box { position: relative; padding: 1.25rem; overflow: auto; color: #e8eaed; background: #25272a; border-radius: 3px; }
.citation-box pre { margin: 0; padding-right: 7rem; font-family: var(--mono); font-size: .78rem; line-height: 1.65; white-space: pre-wrap; }
.copy-button { position: absolute; top: .8rem; right: .8rem; padding: .4rem .65rem; color: #fff; background: transparent; border: 1px solid #686d73; border-radius: 3px; cursor: pointer; }
.project-footer { display: flex; justify-content: space-between; }

/* ILI paper page */
.ili-hero h1 { max-width: 900px; font-size: clamp(2.45rem, 6vw, 4.25rem); }
.ili-answer {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 1.2rem;
  align-items: baseline;
  margin-top: 3rem;
  padding: 1.25rem 1.4rem;
  border-left: 3px solid var(--link);
  background: var(--soft);
}
.ili-answer span {
  color: var(--muted);
  font-size: .75rem;
  font-weight: 650;
  letter-spacing: .07em;
  text-transform: uppercase;
}
.ili-answer p { margin: 0; font-family: var(--serif); font-size: 1.2rem; line-height: 1.5; }

.ili-flow { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.ili-flow li {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 1rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--line);
}
.ili-flow-number {
  display: grid;
  width: 32px;
  height: 32px;
  place-items: center;
  color: #fff;
  background: var(--link);
  border-radius: 50%;
  font-family: var(--mono);
  font-size: .75rem;
}
.ili-flow strong { font-size: 1rem; }
.ili-flow p { margin: .25rem 0 0; color: var(--muted); font-size: .92rem; }

.ili-context { width: 100%; max-width: none; padding-left: max(1.25rem, calc((100vw - var(--content)) / 2)); padding-right: max(1.25rem, calc((100vw - var(--content)) / 2)); background: var(--soft); }
.ili-context-heading { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: end; }
.ili-context-heading h2 { margin: 0; font-family: var(--serif); font-size: 2rem; font-weight: 500; line-height: 1.25; }
.ili-context-heading > p { margin: 0; color: var(--muted); }
.context-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 2rem; margin: 2.5rem 0 0; }
.context-list > div { padding: 1.15rem 0; border-top: 1px solid var(--line); }
.context-list dt { font-weight: 650; }
.context-list dd { margin: .3rem 0 0; color: var(--muted); font-size: .9rem; }
.citation-prose { max-width: 800px; margin: 0 0 1.25rem; }

/* ERPO extends the existing paper-page layout without changing other pages. */
.erpo-summary { max-width: 790px; margin: 2rem 0 0; font-size: 1.1rem; }
.erpo-table-wrap { margin-top: 2rem; overflow-x: auto; }
.erpo-table-hint { display: none; }
.erpo-table-wrap:focus-visible { outline: 2px solid var(--link); outline-offset: 4px; }
.erpo-results { width: 100%; min-width: 620px; border-collapse: collapse; background: #fff; font-size: .95rem; }
.erpo-results caption { padding: 0 0 1rem; text-align: left; font-size: .9rem; color: var(--muted); }
.erpo-results th, .erpo-results td { padding: .85rem 1rem; border-bottom: 1px solid var(--line); text-align: right; }
.erpo-results th:first-child { text-align: left; }
.erpo-results thead th { font-size: .88rem; font-weight: 600; }
.erpo-results td { font-variant-numeric: tabular-nums; }
.erpo-result-highlight { color: var(--link); font-weight: 650; }
.erpo-result-context { margin: 1.4rem 0 0; }
.erpo-version-note { color: var(--muted); font-size: .9rem; margin-top: 1.5rem; }
.erpo-page .hero-figure figcaption { font-size: .9rem; }
.erpo-page #scope h2 { font-family: var(--serif); font-size: 2rem; font-weight: 500; line-height: 1.3; }
.erpo-page .citation-box pre { overflow-wrap: anywhere; font-size: .875rem; }

@media (max-width: 760px) {
  .erpo-table-hint { display: block; margin: 1rem 0 0; color: var(--muted); font-size: .9rem; }
  .classic-header {
    align-items: flex-start;
    flex-direction: column;
    gap: .5rem;
  }
  .profile-block {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 1.35rem;
    align-items: start;
  }
  .profile-photo {
    width: 150px;
    height: 195px;
  }
  .home-main { padding-top: 3.2rem; }
  .publication { grid-template-columns: 1fr; gap: .3rem; }
  .claim-grid,
  .method-layout,
  .results-heading,
  .ili-context-heading,
  .context-list,
  .result-cards,
  .evidence-grid,
  .resource-grid { grid-template-columns: 1fr; }
  .method-layout,
  .results-heading,
  .ili-context-heading { gap: 1.8rem; }
}

@media (max-width: 560px) {
  .classic-header nav { gap: .8rem; }
  .classic-main { padding-top: 1.4rem; }
  .profile-block {
    grid-template-columns: 1fr;
  }
  .profile-photo {
    width: 165px;
    height: 214px;
  }
  .profile-copy h2 { margin-top: .2rem; }
  .site-header { align-items: flex-start; padding: 1.1rem 0; }
  .site-header nav { gap: .8rem; }
  .site-header nav a:first-child { display: none; }
  .ili-page .site-header { flex-direction: column; gap: .55rem; }
  .ili-page .site-header nav { width: 100%; flex-wrap: wrap; gap: .35rem 1rem; }
  .ili-page .site-header nav a:first-child { display: inline; }
  .erpo-page .site-header { flex-direction: column; gap: .55rem; }
  .erpo-page .site-header nav { width: 100%; flex-wrap: wrap; gap: .35rem 1rem; }
  .erpo-page .site-header nav a:first-child { display: inline; }
  .project-hero { padding-top: 2.5rem; }
  .project-actions .button { min-height: 36px; }
  .ili-answer { grid-template-columns: 1fr; gap: .35rem; }
  .citation-box pre { padding: 2.8rem 0 0; font-size: .7rem; }
  .site-footer.project-footer { flex-direction: column; gap: .5rem; }
}

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