:root {
  --paper: #f2f0e9;
  --paper-dark: #e8e5dc;
  --ink: #1a1b18;
  --muted: #65655e;
  --faint: #8b8a82;
  --rule: #cbc8bd;
  --rule-dark: #a9a69b;
  --red: #b54332;
  --blue: #245a73;
  --content: 1240px;
  --pad: clamp(20px, 4.2vw, 68px);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  background: repeating-linear-gradient(90deg, transparent 0, transparent calc(25vw - 1px), rgba(26,27,24,.026) calc(25vw - 1px), rgba(26,27,24,.026) 25vw);
  pointer-events: none;
  content: "";
}

a { color: inherit; text-decoration: none; }

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

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 9px 12px;
  color: var(--paper);
  background: var(--ink);
  transform: translateY(-160%);
}

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

.site-header,
.site-footer,
.page-grid,
.section-shell {
  width: min(100%, var(--content));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  min-height: 78px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 28px;
  padding-inline: var(--pad);
  background: rgba(242,240,233,.94);
  border-top: 4px solid var(--red);
  border-bottom: 1px solid var(--rule-dark);
  backdrop-filter: blur(14px);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  width: max-content;
  font-size: 14px;
  font-weight: 600;
}

.wordmark-index {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 26px;
  color: var(--paper);
  background: var(--red);
  font-family: "IBM Plex Mono", monospace;
  font-size: 9px;
  font-weight: 500;
  letter-spacing: .08em;
}

.site-header nav,
.site-footer nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.site-header nav a,
.site-footer nav a {
  color: var(--muted);
  font-family: "IBM Plex Mono", monospace;
  font-size: 10px;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.site-header nav a:hover,
.site-footer nav a:hover { color: var(--red); }

.header-action {
  justify-self: end;
  padding-bottom: 3px;
  border-bottom: 1px solid var(--ink);
  font-size: 12px;
  font-weight: 600;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(320px, .75fr);
  gap: clamp(52px, 8vw, 118px);
  padding: clamp(78px, 9vw, 130px) var(--pad) clamp(76px, 9vw, 118px);
  border-bottom: 1px solid var(--rule-dark);
}

.hero::after {
  position: absolute;
  right: var(--pad);
  bottom: -1px;
  left: var(--pad);
  height: 4px;
  background: linear-gradient(90deg, var(--red) 0 34%, var(--blue) 34% 66%, var(--ink) 66%);
  content: "";
}

.eyebrow,
.section-header > p:first-child {
  margin: 0;
  color: var(--red);
  font-family: "IBM Plex Mono", monospace;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: .09em;
  text-transform: uppercase;
}

.eyebrow span { color: var(--rule-dark); }

.section-header > p:first-child {
  padding-top: 9px;
  border-top: 2px solid var(--red);
}

.hero h1 {
  max-width: 850px;
  margin: 26px 0 30px;
  font-family: "Literata", Georgia, serif;
  font-size: clamp(48px, 5.8vw, 80px);
  font-weight: 500;
  letter-spacing: -.052em;
  line-height: 1.02;
  text-wrap: balance;
}

.standfirst {
  max-width: 720px;
  margin: 0;
  color: var(--muted);
  font-family: "Literata", Georgia, serif;
  font-size: clamp(17px, 1.5vw, 21px);
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-top: 36px;
}

.primary-link {
  display: inline-flex;
  align-items: center;
  gap: 20px;
  min-height: 46px;
  padding: 0 18px;
  color: var(--paper);
  background: var(--ink);
  font-family: "IBM Plex Mono", monospace;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.primary-link:hover { background: var(--red); }

.secondary-link {
  padding-bottom: 3px;
  color: var(--blue);
  border-bottom: 1px solid currentColor;
  font-family: "IBM Plex Mono", monospace;
  font-size: 10px;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.publication-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin: 64px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
}

.publication-meta div { min-width: 0; }
.publication-meta dt { margin-bottom: 5px; color: var(--faint); font-family: "IBM Plex Mono", monospace; font-size: 9px; letter-spacing: .06em; text-transform: uppercase; }
.publication-meta dd { margin: 0; color: var(--muted); font-size: 11px; }

.thesis {
  position: relative;
  align-self: end;
  padding: 24px 24px 0;
  background: rgba(232,229,220,.58);
  border-top: 4px solid var(--ink);
  border-bottom: 1px solid var(--rule-dark);
}

.thesis::after {
  position: absolute;
  top: -4px;
  right: 0;
  width: 54px;
  height: 4px;
  background: var(--red);
  content: "";
}

.thesis-heading {
  display: flex;
  justify-content: space-between;
  color: var(--faint);
  font-family: "IBM Plex Mono", monospace;
  font-size: 9px;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.thesis h2 {
  margin: 28px 0 24px;
  font-family: "Literata", Georgia, serif;
  font-size: clamp(27px, 2.6vw, 38px);
  font-weight: 500;
  letter-spacing: -.035em;
  line-height: 1.14;
}

.equation {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 0 0 24px;
  padding: 18px;
  color: var(--blue);
  background: rgba(242,240,233,.82);
  border-left: 2px solid var(--blue);
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
}

.equation b { color: var(--rule-dark); font-weight: 400; }
.thesis > p { margin: 0 0 28px; color: var(--muted); font-size: 14px; line-height: 1.65; }

.section-shell { padding: clamp(78px, 9vw, 120px) var(--pad); border-bottom: 1px solid var(--rule-dark); }

.section-header {
  display: grid;
  grid-template-columns: .32fr 1fr .72fr;
  gap: clamp(30px, 5vw, 72px);
  align-items: start;
  margin-bottom: 58px;
}

.section-header.compact { grid-template-columns: .32fr 1.72fr; }

.section-header h2 {
  margin: 0;
  font-family: "Literata", Georgia, serif;
  font-size: clamp(34px, 4vw, 54px);
  font-weight: 500;
  letter-spacing: -.04em;
  line-height: 1.08;
}

.section-summary { margin: 4px 0 0; color: var(--muted); font-size: 14px; line-height: 1.7; }

.chapters { background: var(--paper-dark); }
.chapter-list { border-top: 1px solid var(--rule-dark); }
.chapter-list > a {
  position: relative;
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr) 150px 26px;
  gap: 24px;
  align-items: center;
  min-height: 146px;
  padding: 24px 0;
  border-bottom: 1px solid var(--rule);
}

.chapter-list > a::before {
  position: absolute;
  top: -1px;
  bottom: -1px;
  left: -14px;
  width: 3px;
  background: var(--red);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 180ms ease;
  content: "";
}

.item-number,
.item-meta,
.paper-id,
.paper-topic {
  color: var(--faint);
  font-family: "IBM Plex Mono", monospace;
  font-size: 9px;
  letter-spacing: .05em;
  text-transform: uppercase;
}

.chapter-list h3,
.research-list h3 { margin: 0; font-family: "Literata", Georgia, serif; font-size: clamp(21px, 2.25vw, 31px); font-weight: 500; letter-spacing: -.025em; }
.chapter-list p { max-width: 720px; margin: 8px 0 0; color: var(--muted); font-size: 13px; }
.item-arrow { font-size: 18px; transition: transform 160ms ease; }
.chapter-list > a:hover h3 { color: var(--red); }
.chapter-list > a:hover::before { transform: scaleY(1); }
.chapter-list > a:hover .item-arrow { transform: translate(3px, -3px); }

.research-list { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--rule-dark); }
.research-list > a {
  min-height: 178px;
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) auto 18px;
  gap: 16px;
  align-items: start;
  padding: 26px 24px 26px 0;
  border-bottom: 1px solid var(--rule);
  transition: background 160ms ease;
}

.research-list > a:nth-child(odd) { padding-right: 34px; border-right: 1px solid var(--rule); }
.research-list > a:nth-child(even) { padding-left: 34px; }
.research-list h3 { font-size: 23px; }
.research-list p { margin: 8px 0 0; color: var(--muted); font-size: 12px; line-height: 1.6; }
.paper-topic { padding: 4px 6px; color: var(--blue); background: color-mix(in srgb, var(--blue) 8%, transparent); white-space: nowrap; }
.research-list > a:hover { background: rgba(232,229,220,.72); }
.research-list > a:hover h3 { color: var(--red); }

.site-footer {
  min-height: 124px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
  padding: 28px var(--pad);
  border-top: 4px solid var(--ink);
}

.site-footer > div { display: grid; gap: 5px; }
.site-footer strong { font-size: 13px; }
.site-footer span { color: var(--muted); font-family: "Literata", Georgia, serif; font-size: 12px; }

@media (max-width: 980px) {
  .site-header { grid-template-columns: 1fr auto; }
  .site-header nav { display: none; }
  .hero { grid-template-columns: 1fr; }
  .hero-copy { max-width: 820px; }
  .thesis { max-width: 680px; }
  .section-header,
  .section-header.compact { grid-template-columns: .3fr 1fr; }
  .section-summary { grid-column: 2; }
  .research-list { grid-template-columns: 1fr; }
  .research-list > a:nth-child(odd),
  .research-list > a:nth-child(even) { padding-inline: 0; border-right: 0; }
}

@media (max-width: 680px) {
  :root { --pad: 20px; }
  .site-header { min-height: 68px; }
  .wordmark { font-size: 13px; }
  .header-action { font-size: 10px; }
  .hero { padding-top: 68px; padding-bottom: 72px; gap: 70px; }
  .hero h1 { margin-top: 22px; font-size: clamp(43px, 13vw, 58px); }
  .standfirst { font-size: 16px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 18px; }
  .publication-meta { grid-template-columns: 1fr; gap: 14px; margin-top: 44px; }
  .publication-meta div { padding-bottom: 12px; border-bottom: 1px solid var(--rule); }
  .section-shell { padding-top: 72px; padding-bottom: 72px; }
  .section-header,
  .section-header.compact { grid-template-columns: 1fr; gap: 18px; margin-bottom: 42px; }
  .section-summary { grid-column: 1; }
  .section-header h2 { font-size: 38px; }
  .chapter-list > a { grid-template-columns: 30px minmax(0, 1fr) 22px; gap: 14px; min-height: 168px; }
  .item-meta { grid-column: 2; }
  .item-arrow { grid-column: 3; grid-row: 1 / span 2; }
  .research-list > a { grid-template-columns: 36px minmax(0, 1fr) 18px; min-height: 174px; padding-block: 24px; }
  .paper-topic { grid-column: 2; }
  .research-list > a > span:last-child { grid-column: 3; grid-row: 1 / span 2; }
  .site-footer { align-items: flex-start; flex-direction: column; }
  .site-footer nav { gap: 18px; }
}

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