/* LLMs Research - editorial */

:root {
  --bg: #fbfaf7;
  --bg-paper: #ffffff;
  --ink: #15171a;
  --ink-2: #2f3339;
  --ink-3: #5a6068;
  --ink-4: #8a9099;
  --rule: #e3ddd0;
  --rule-2: #ece7db;
  --accent: #b3331d;
  --accent-hover: #8a2614;
  --accent-soft: #f5e8e3;

  --serif: "Newsreader", "Source Serif 4", Georgia, "Times New Roman", serif;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --maxw: 980px;
  --maxw-wide: 1200px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--accent); text-decoration: none; border-bottom: 1px solid transparent; transition: border-color .15s ease, color .15s ease; }
a:hover { color: var(--accent-hover); border-bottom-color: currentColor; }

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

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 48px; }
.wrap.wide { max-width: var(--maxw-wide); }
@media (max-width: 700px) { .wrap { padding: 0 24px; } }

::selection { background: var(--accent); color: #fff; }

/* Header */
.site-header {
  border-bottom: 1px solid var(--rule);
  padding: 20px 0;
  background: rgba(244, 241, 234, 0.92);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  position: sticky; top: 0; z-index: 50;
}
.site-header .wrap {
  max-width: var(--maxw-wide);
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px;
}
.brand {
  font-family: var(--mono);
  font-weight: 500;
  font-size: 14px;
  color: var(--ink);
  display: inline-flex; align-items: baseline; gap: 8px;
  letter-spacing: 0.02em;
  border-bottom: none;
  white-space: nowrap;
  flex-shrink: 0;
}
.brand-text, .brand-text-roman { font-style: normal; }
.brand:hover { color: var(--accent); border-bottom: none; }
.brand-text { font-style: italic; }
.brand-text-roman { font-style: normal; }

nav.primary {
  display: flex; gap: 26px;
  font-size: 13px;
  font-family: var(--mono);
  letter-spacing: 0.02em;
}
nav.primary a {
  color: var(--ink-3);
  border-bottom: none;
  text-transform: lowercase;
}
nav.primary a:hover { color: var(--accent); border-bottom: none; }
nav.primary a.active {
  color: var(--ink); font-weight: 500;
  position: relative;
}
nav.primary a.active::after {
  content: ""; position: absolute;
  left: 0; right: 0; bottom: -22px;
  height: 2px; background: var(--accent);
}

@media (max-width: 700px) {
  .site-header .wrap { flex-direction: column; align-items: flex-start; gap: 14px; }
  nav.primary { flex-wrap: wrap; gap: 18px; font-size: 12px; }
  nav.primary a.active::after { display: none; }
}

/* Page */
main { padding: 64px 0 96px; }

h1 {
  font-family: var(--serif);
  font-size: 56px;
  font-weight: 400;
  letter-spacing: -0.022em;
  margin: 0 0 28px;
  line-height: 1.12;
  color: var(--ink);
}
h1 em { font-style: italic; color: var(--accent); }

h2 {
  font-family: var(--serif);
  font-size: 36px;
  font-weight: 500;
  margin: 64px 0 18px;
  letter-spacing: -0.012em;
  line-height: 1.2;
  color: var(--ink);
}

h3 {
  font-family: var(--sans);
  font-size: 16px;
  font-weight: 600;
  margin: 32px 0 8px;
  letter-spacing: 0.005em;
  color: var(--ink);
}

p { margin: 0 0 18px; color: var(--ink-2); font-size: 17px; }
p.lede {
  font-family: var(--serif);
  font-size: 22px;
  color: var(--ink-2);
  margin: 0 0 36px;
  line-height: 1.5;
  font-weight: 400;
  letter-spacing: -0.005em;
}

ul, ol { padding-left: 22px; margin: 0 0 16px; color: var(--ink-2); }
ul li, ol li { margin: 4px 0; }

hr { border: 0; border-top: 1px solid var(--rule); margin: 48px 0; }

/* Eyebrow */
.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  display: inline-flex; align-items: center; gap: 10px;
  margin-bottom: 18px;
}
.eyebrow::before {
  content: ""; width: 18px; height: 1px;
  background: var(--accent);
}

/* Hero */
.hero {
  position: relative;
  padding: 64px 0 72px;
  margin-bottom: 48px;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100vw;
  background:
    radial-gradient(ellipse 80% 60% at 30% 20%, rgba(193, 64, 41, 0.04), transparent 60%),
    linear-gradient(180deg, #f4f1ea 0%, #f7f4ed 100%);
  border-bottom: 1px solid var(--rule);
  z-index: -1;
}
.hero > * { position: relative; }
.hero h1 { font-size: 64px; max-width: 760px; line-height: 1.08; margin-bottom: 32px; margin-top: 0; }
.hero .lede { margin-top: 0; }
@media (max-width: 700px) {
  .hero { padding: 40px 0 48px; margin-bottom: 32px; }
  .hero h1 { font-size: 40px; }
}

/* Section divider */
.divider {
  display: flex; align-items: center; gap: 14px;
  margin: 60px 0 28px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.divider::before, .divider::after {
  content: ""; flex: 1; height: 1px; background: var(--rule);
}

/* Editorial item list (papers, repos, issues) - stacked, no grid */
.items { list-style: none; padding: 0; margin: 24px 0 0; }
.items > li {
  display: flex;
  gap: 28px;
  padding: 28px 0;
  border-top: 1px solid var(--rule);
  margin: 0;
  position: relative;
}
.items > li:last-child { border-bottom: 1px solid var(--rule); }
.items .index {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--accent);
  flex-shrink: 0;
  width: 36px;
  padding-top: 4px;
}
.items .body { flex: 1; min-width: 0; }
.items .meta {
  display: flex; gap: 12px; align-items: center; flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-3);
  margin-bottom: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.items .meta .venue {
  color: var(--ink);
  font-weight: 500;
}
.items .meta .dot {
  width: 3px; height: 3px; border-radius: 50%;
  background: var(--ink-4);
  display: inline-block;
}
.items .title {
  font-family: var(--serif);
  font-size: 22px;
  color: var(--ink);
  font-weight: 500;
  margin: 0 0 8px;
  line-height: 1.3;
  letter-spacing: -0.008em;
}
.items .desc {
  font-size: 15.5px;
  color: var(--ink-3);
  margin: 8px 0 12px;
  line-height: 1.6;
}
.items .links {
  display: flex; gap: 18px; flex-wrap: wrap;
  font-size: 12px;
  font-family: var(--mono);
  margin-top: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.items .links a { color: var(--ink-2); border-bottom: 1px solid var(--rule); padding-bottom: 1px; }
.items .links a:hover { color: var(--accent); border-bottom-color: var(--accent); }

@media (max-width: 700px) {
  .items > li { flex-direction: column; gap: 8px; }
  .items .index { width: auto; }
}

/* Repo list (stacked editorial, no grid) */
.repos { list-style: none; padding: 0; margin: 24px 0 0; }
.repos > li {
  border-top: 1px solid var(--rule);
  padding: 0;
  margin: 0;
}
.repos > li:last-child { border-bottom: 1px solid var(--rule); }
.repo-row {
  display: flex;
  gap: 28px;
  padding: 28px 4px;
  align-items: flex-start;
  text-decoration: none;
  color: inherit;
  border-bottom: none;
  transition: padding-left .25s ease, background .2s ease;
  position: relative;
}
.repo-row:hover {
  background: var(--bg-paper);
  padding-left: 16px;
  border-bottom: none;
  color: inherit;
}
.repo-row::after {
  content: "→";
  position: absolute;
  right: 12px; top: 30px;
  font-family: var(--serif);
  font-size: 22px;
  color: var(--ink-4);
  opacity: 0;
  transition: opacity .2s ease, transform .2s ease, color .2s ease;
}
.repo-row:hover::after { opacity: 1; transform: translateX(4px); color: var(--accent); }
.repo-row .index {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--accent);
  width: 36px; flex-shrink: 0;
  padding-top: 6px;
}
.repo-row .body { flex: 1; min-width: 0; padding-right: 40px; }
.repo-row .repo-handle {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--ink-3);
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}
.repo-row .repo-handle svg { flex-shrink: 0; opacity: 0.7; }
.repo-row .repo-title {
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 500;
  color: var(--ink);
  margin: 4px 0 8px;
  letter-spacing: -0.012em;
  line-height: 1.2;
}
.repo-row .repo-desc {
  font-size: 15.5px;
  color: var(--ink-3);
  line-height: 1.6;
  margin: 6px 0 14px;
  max-width: 56ch;
}
.repo-row .repo-tags {
  display: flex; gap: 14px; align-items: center; flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.repo-row .lang {
  display: inline-flex; align-items: center; gap: 6px;
}
.repo-row .lang::before {
  content: ""; width: 8px; height: 8px; border-radius: 50%;
  background: var(--lang-color, #3572A5);
}
.repo-row .repo-topic {
  border: 1px solid var(--rule);
  padding: 3px 9px;
  border-radius: 3px;
  background: var(--bg-paper);
}

@media (max-width: 700px) {
  .repo-row { flex-direction: column; gap: 8px; padding: 24px 0; }
  .repo-row:hover { padding-left: 0; }
  .repo-row::after { display: none; }
  .repo-row .index { width: auto; }
  .repo-row .body { padding-right: 0; }
  .repo-row .repo-title { font-size: 22px; }
}

/* Hero block on home */
.hero-block {
  padding: 24px 0 40px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 24px;
}

/* Drop cap for first paragraph */
.dropcap::first-letter {
  font-family: var(--serif);
  font-size: 64px;
  font-weight: 400;
  float: left;
  line-height: 0.9;
  margin: 8px 10px 0 0;
  color: var(--accent);
}

/* Footer */
.site-footer {
  position: relative;
  border-top: 1px solid var(--rule);
  padding: 64px 0 36px;
  margin-top: 80px;
  background: linear-gradient(180deg, #f4f1ea 0%, #efeae0 100%);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-3);
  letter-spacing: 0.02em;
}
.site-footer .wrap {
  max-width: var(--maxw-wide);
  display: block;
}
.site-footer .footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.site-footer .footer-grid h4 {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-3);
  margin: 0 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--rule);
}
.site-footer .footer-grid ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.site-footer .footer-grid a {
  color: var(--ink-2);
  border-bottom: none;
  text-transform: lowercase;
  font-size: 12.5px;
}
.site-footer .footer-grid a:hover { color: var(--accent); border-bottom: none; }
.site-footer .about-blurb {
  font-family: var(--serif);
  font-size: 15px;
  font-style: italic;
  color: var(--ink-2);
  line-height: 1.5;
  letter-spacing: 0;
  text-transform: none;
  margin: 0 0 18px;
  max-width: 32ch;
}
.site-footer .footer-mark {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: -0.01em;
  text-transform: none;
  margin-bottom: 14px;
}
.site-footer .footer-mark em {
  font-family: var(--mono);
  font-style: italic;
  font-size: 18px;
  color: var(--accent);
  margin-right: 6px;
  font-weight: 500;
}
.site-footer .footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
  flex-wrap: wrap;
  gap: 16px;
}
.site-footer .footer-bottom .legal { color: var(--ink-3); }
.site-footer .social { display: flex; gap: 22px; }
.site-footer .social a {
  color: var(--ink-3);
  border-bottom: none;
  text-transform: lowercase;
}
.site-footer .social a:hover { color: var(--accent); border-bottom: none; }

@media (max-width: 800px) {
  .site-footer { padding: 48px 0 28px; margin-top: 56px; }
  .site-footer .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; margin-bottom: 36px; }
  .site-footer .footer-grid > div:first-child { grid-column: 1 / -1; }
  .site-footer .footer-bottom { flex-direction: column; align-items: flex-start; }
}

/* Flashcards stacked showcase (no grid) */
.cards-showcase {
  margin: 32px 0 16px;
  padding: 32px 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.cards-row {
  display: flex;
  gap: 24px;
  overflow-x: auto;
  padding-bottom: 8px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}
.cards-row figure {
  flex: 0 0 auto;
  width: 320px;
  margin: 0;
  scroll-snap-align: start;
}
.cards-row img {
  width: 100%;
  border: 1px solid var(--rule);
  border-radius: 4px;
  background: var(--bg-paper);
  box-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 8px 20px -8px rgba(0,0,0,0.08);
  transition: transform .25s ease, box-shadow .25s ease;
}
.cards-row figure:hover img {
  transform: translateY(-3px);
  box-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 16px 32px -10px rgba(0,0,0,0.14);
}
.cards-row figcaption {
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.cards-hero { margin: 0; }
.cards-hero img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 4px;
}

/* Topic / contents stacked list */
.contents { list-style: none; padding: 0; margin: 16px 0; }
.contents li {
  display: flex; gap: 18px; align-items: baseline;
  padding: 14px 0;
  border-top: 1px dashed var(--rule);
  font-size: 16px;
  color: var(--ink-2);
}
.contents li:last-child { border-bottom: 1px dashed var(--rule); }
.contents .num {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.08em;
  width: 30px; flex-shrink: 0;
}
.contents .topic-title {
  font-family: var(--serif);
  font-size: 18px;
  color: var(--ink);
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 22px;
  background: var(--ink);
  color: var(--bg);
  border-radius: 3px;
  font-size: 13px;
  font-weight: 500;
  font-family: var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-bottom: none;
  transition: background .15s ease;
}
.btn:hover { background: var(--accent); color: white; border-bottom: none; }
.btn .arrow { transition: transform .15s ease; }
.btn:hover .arrow { transform: translateX(3px); }
.btn.outline {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--ink);
}
.btn.outline:hover { background: var(--ink); color: var(--bg); }

/* Tags */
.tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 10.5px;
  padding: 3px 8px;
  border-radius: 2px;
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* Pull quote */
.pullquote {
  font-family: var(--serif);
  font-size: 26px;
  line-height: 1.35;
  font-style: italic;
  color: var(--ink);
  margin: 36px 0;
  padding-left: 22px;
  border-left: 2px solid var(--accent);
  letter-spacing: -0.005em;
}

/* Stat row */
/* === Editorial home page === */

.masthead {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 12px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding: 8px 0 24px;
  border-bottom: 3px double var(--ink);
  margin-bottom: 56px;
}
.masthead span:nth-child(2) { color: var(--accent); }

.cover { padding: 0 0 48px; max-width: 980px; margin: 0 auto; text-align: center; }
.cover .display {
  font-family: var(--serif);
  font-size: clamp(44px, 7vw, 92px);
  font-weight: 400;
  line-height: 1.02;
  letter-spacing: -0.025em;
  margin: 0;
  color: var(--ink);
}
.cover .display em {
  font-style: italic;
  color: var(--accent);
}

.lead {
  display: flex; gap: 56px;
  max-width: 880px; margin: 24px auto 0;
  padding: 0 0 16px;
}
.lead-col { flex: 1; }
.lead-col p { margin: 0; font-size: 16px; line-height: 1.7; color: var(--ink-2); }
@media (max-width: 760px) {
  .lead { flex-direction: column; gap: 18px; }
}

.rule-thick {
  border: 0;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  height: 4px;
  margin: 56px auto;
  max-width: 880px;
}

.manifesto {
  max-width: 720px; margin: 0 auto;
  display: flex; gap: 32px; align-items: flex-start;
  padding: 8px 0;
}
.manifesto-label {
  flex-shrink: 0; width: 110px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  padding-top: 6px;
}
.manifesto-text {
  font-family: var(--serif);
  font-style: italic;
  font-size: 24px;
  line-height: 1.45;
  color: var(--ink);
  margin: 0;
  letter-spacing: -0.005em;
}
@media (max-width: 760px) {
  .manifesto { flex-direction: column; gap: 12px; }
  .manifesto-label { width: auto; padding-top: 0; }
  .manifesto-text { font-size: 20px; }
}

.areas { max-width: 880px; margin: 0 auto; }
.areas-head {
  display: flex; align-items: baseline; gap: 18px;
  margin-bottom: 28px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--rule);
}
.section-no {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}
.section-title {
  font-family: var(--serif);
  font-size: 32px;
  font-weight: 500;
  margin: 0;
  letter-spacing: -0.012em;
}

.area {
  display: flex; gap: 32px;
  padding: 28px 0;
  border-bottom: 1px solid var(--rule);
  align-items: flex-start;
}
.area:last-child { border-bottom: none; }
.area-num {
  flex-shrink: 0; width: 50px;
  font-family: var(--serif);
  font-style: italic;
  font-size: 32px;
  color: var(--accent);
  line-height: 1;
  padding-top: 8px;
}
.area-body { flex: 1; }
.area-title {
  font-family: var(--serif);
  font-size: 24px;
  font-weight: 500;
  margin: 0 0 10px;
  letter-spacing: -0.008em;
  color: var(--ink);
  text-transform: none;
}
.area-title::before { display: none; }
.area-body p { margin: 0; font-size: 16.5px; line-height: 1.65; color: var(--ink-2); }
@media (max-width: 700px) {
  .area { flex-direction: column; gap: 4px; }
  .area-num { width: auto; padding-top: 0; }
}

.featured { max-width: 880px; margin: 0 auto; }
.featured-tag {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}
.featured-card {
  display: block;
  padding: 36px 40px 32px;
  background: var(--bg-paper);
  border: 1px solid var(--rule);
  text-decoration: none;
  color: inherit;
  border-bottom: 1px solid var(--rule);
  transition: border-color .2s ease, box-shadow .2s ease;
  position: relative;
}
.featured-card:hover {
  border-color: var(--accent);
  box-shadow: 0 12px 32px -16px rgba(179,51,29,0.25);
  color: inherit;
}
.featured-meta {
  display: flex; gap: 12px; align-items: center;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 14px;
}
.featured-meta .dot {
  width: 3px; height: 3px; border-radius: 50%;
  background: var(--ink-4);
}
.featured-title {
  font-family: var(--serif);
  font-size: 30px;
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: -0.012em;
  margin: 0 0 18px;
  color: var(--ink);
}
.featured-byline {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0;
}
.featured-card:hover .link-arrow { transform: translateX(4px); }
.link-arrow { display: inline-block; transition: transform .2s ease; margin-left: 4px; }

.closing {
  display: flex; gap: 56px;
  max-width: 880px; margin: 0 auto;
  align-items: flex-start;
}
.closing-col-label {
  flex-shrink: 0; width: 220px;
  position: sticky; top: 100px;
}
.closing-col-label .section-no { display: block; margin-bottom: 8px; }
.closing-col-label .section-title { font-size: 28px; }
.closing-col-body { flex: 1; }
.closing-col-body p { font-size: 17px; line-height: 1.7; color: var(--ink-2); }
.closing-cta {
  display: flex; gap: 14px; flex-wrap: wrap;
  margin-top: 28px;
}
@media (max-width: 760px) {
  .closing { flex-direction: column; gap: 18px; }
  .closing-col-label { width: auto; position: static; }
}