:root {
  --bg: #fbf8f3;
  --paper: #fffdf9;
  --ink: #26211e;
  --muted: #6e655e;
  --line: #e8ded3;
  --accent: #ad4f34;
  --accent-deep: #7f3828;
  --accent-soft: #f2dfd5;
  --olive: #6f7457;
  --gold: #b08b47;
  --rose: #9d665b;
  --dark: #2d2926;
  --shadow: 0 18px 50px rgba(58, 42, 32, .08);
  --radius: 22px;
  --container: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
img { max-width: 100%; }
.container { width: min(calc(100% - 40px), var(--container)); margin: 0 auto; }
.skip-link { position: absolute; left: -9999px; top: 8px; padding: 10px 14px; background: #fff; z-index: 1000; }
.skip-link:focus { left: 8px; }

.nav-wrap {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(232, 222, 211, .8);
  background: rgba(251, 248, 243, .88);
  backdrop-filter: blur(14px);
}
.nav { height: 68px; display: flex; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 780; letter-spacing: -.02em; }
.brand-mark { width: 30px; height: 30px; border-radius: 10px; display: grid; place-items: center; background: var(--accent); color: white; font-family: Georgia, serif; font-weight: 700; }
.nav-links { display: flex; align-items: center; gap: 24px; font-size: 14px; color: #514a45; }
.nav-links a { text-decoration: none; }
.nav-links a:hover { color: var(--accent); }
.nav-github { border: 1px solid var(--line); border-radius: 999px; padding: 8px 13px; background: rgba(255,255,255,.55); }

.hero { padding: 104px 0 72px; position: relative; overflow: hidden; }
.hero::before, .hero::after { content: ""; position: absolute; border-radius: 999px; filter: blur(1px); pointer-events: none; }
.hero::before { width: 360px; height: 360px; right: -120px; top: -80px; background: radial-gradient(circle, rgba(173,79,52,.10), rgba(173,79,52,0)); }
.hero::after { width: 280px; height: 280px; left: -120px; bottom: -80px; background: radial-gradient(circle, rgba(111,116,87,.08), rgba(111,116,87,0)); }
.hero-inner { max-width: 930px; text-align: center; }
.eyebrow, .kicker { text-transform: uppercase; letter-spacing: .13em; font-weight: 750; font-size: 12px; color: var(--accent); }
.hero h1 { margin: 18px auto 20px; font-family: Georgia, "Times New Roman", serif; font-weight: 500; font-size: clamp(42px, 6.3vw, 76px); line-height: 1.04; letter-spacing: -.035em; max-width: 1000px; }
.accent { color: var(--accent); }
.hero-lede { max-width: 780px; margin: 0 auto; color: var(--muted); font-size: clamp(18px, 2.1vw, 22px); line-height: 1.55; }
.hero-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 32px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 0 18px; border-radius: 999px; text-decoration: none; font-size: 14px; font-weight: 700; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.button:hover { transform: translateY(-1px); }
.button.primary { background: var(--accent); color: #fff; box-shadow: 0 8px 20px rgba(173,79,52,.2); }
.button.primary:hover { background: var(--accent-deep); }
.button.secondary { background: rgba(255,255,255,.7); border: 1px solid var(--line); }
.paper-status { margin: 20px 0 0; color: #887e76; font-size: 13px; }

.section { padding: 88px 0; }
.section.compact { padding-top: 18px; padding-bottom: 70px; }
.section.warm { background: #f4ede5; border-top: 1px solid #eadfd5; border-bottom: 1px solid #eadfd5; }
.section.dark { background: var(--dark); color: #f8f3ed; }
.section-heading { max-width: 760px; margin-bottom: 42px; }
.section-heading h2, .question-card h2, .split h2, .paper-block h2 { font-family: Georgia, "Times New Roman", serif; font-weight: 500; letter-spacing: -.025em; line-height: 1.15; font-size: clamp(32px, 4vw, 48px); margin: 10px 0 14px; }
.section-heading p { color: var(--muted); margin: 0; font-size: 18px; }
.section-heading.light p { color: #c9c0b9; }
.section-heading.light .kicker { color: #df9a7e; }
.question-card { display: grid; grid-template-columns: .9fr 1.1fr; gap: 50px; padding: 34px 38px; border-radius: var(--radius); background: var(--paper); box-shadow: var(--shadow); border: 1px solid rgba(232,222,211,.8); align-items: center; }
.question-card h2 { font-size: 34px; margin-bottom: 0; }
.question-card p { margin: 0; color: var(--muted); font-size: 17px; }

.pipeline { display: grid; grid-template-columns: 1fr 42px 1fr 42px 1fr; align-items: stretch; }
.metric-card { position: relative; min-height: 360px; padding: 28px; border-radius: var(--radius); background: var(--paper); border: 1px solid var(--line); box-shadow: 0 12px 35px rgba(58,42,32,.055); display: flex; flex-direction: column; }
.metric-card::before { content: ""; position: absolute; top: 0; left: 28px; right: 28px; height: 4px; border-radius: 0 0 6px 6px; background: var(--accent); }
.metric-card.lexical::before { background: var(--olive); }
.metric-card.elaboration::before { background: var(--gold); }
.metric-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 34px; }
.metric-index { font-family: Georgia, serif; color: #b9aea4; font-size: 22px; }
.metric-tag { border: 1px solid var(--line); border-radius: 999px; padding: 5px 10px; font-size: 12px; font-weight: 750; color: #665d56; background: #fffaf5; }
.metric-card h3 { font-family: Georgia, serif; font-size: 32px; margin: 0 0 12px; font-weight: 500; letter-spacing: -.02em; }
.metric-card p { color: var(--muted); margin: 0; flex: 1; }
.formula { margin-top: 28px; padding-top: 16px; border-top: 1px solid var(--line); font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; font-size: 12px; color: #5d554f; }
.rho { margin-top: 15px; color: var(--accent); font-size: 18px; }
.lexical .rho { color: var(--olive); }
.elaboration .rho { color: #92702f; }
.arrow { display: grid; place-items: center; color: #b9ada3; font-size: 28px; }
.micro-note { margin: 18px 0 0; color: #8a7f76; font-size: 13px; }

.result-grid { display: grid; grid-template-columns: 1.45fr .78fr .78fr; gap: 18px; }
.result-card { background: rgba(255,255,255,.62); border: 1px solid #e1d4c8; border-radius: 20px; padding: 24px; min-height: 250px; }
.result-card.featured { background: #fffaf5; }
.result-label { color: #8a7465; text-transform: uppercase; font-weight: 800; letter-spacing: .08em; font-size: 11px; }
.result-card h3 { font-family: Georgia, serif; font-size: 29px; line-height: 1.2; font-weight: 500; margin: 22px 0 14px; }
.result-card p { color: #6e6259; margin: 0; }
.big-number { font-family: Georgia, serif; color: var(--accent); font-size: 68px; line-height: 1; margin: 26px 0 18px; }
.source-table-wrap { margin-top: 56px; display: grid; grid-template-columns: .72fr 1.28fr; gap: 38px; align-items: start; }
.table-copy h3 { font-family: Georgia, serif; font-size: 30px; margin: 10px 0; font-weight: 500; }
.table-copy p { color: #6f6259; }
.table-scroll { overflow-x: auto; border-radius: 18px; border: 1px solid #ddcfc3; background: rgba(255,255,255,.5); }
table { border-collapse: collapse; width: 100%; min-width: 520px; font-size: 14px; }
th, td { text-align: right; padding: 13px 16px; border-bottom: 1px solid #e8dcd2; }
th:first-child, td:first-child { text-align: left; }
th { font-size: 12px; text-transform: uppercase; letter-spacing: .06em; color: #7e7065; }
tr:last-child td { border-bottom: 0; }
.divider-row td { border-top: 2px solid #d3c1b4; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; align-items: center; }
.large-copy { color: var(--muted); font-size: 18px; max-width: 570px; }
.text-link { color: var(--accent); font-weight: 750; text-decoration: none; display: inline-block; margin-top: 10px; }
.stat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.stat { background: var(--paper); border: 1px solid var(--line); border-radius: 18px; padding: 22px; min-height: 130px; display: flex; flex-direction: column; justify-content: center; }
.stat strong { font-family: Georgia, serif; font-size: 38px; font-weight: 500; color: var(--accent); }
.stat span { color: var(--muted); }
.stat.wide { grid-column: 1 / -1; min-height: 105px; }

.artifact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.artifact-card { display: grid; grid-template-columns: auto 1fr auto; gap: 16px; align-items: center; padding: 22px; border-radius: 18px; border: 1px solid rgba(255,255,255,.13); color: #f7f1eb; text-decoration: none; background: rgba(255,255,255,.04); transition: background .2s ease, transform .2s ease; }
.artifact-card:hover { background: rgba(255,255,255,.08); transform: translateY(-2px); }
.artifact-icon { width: 38px; height: 38px; border-radius: 12px; display: grid; place-items: center; background: rgba(223,154,126,.12); color: #e4a486; font-size: 20px; }
.artifact-card h3 { margin: 0 0 4px; font-size: 16px; }
.artifact-card p { margin: 0; color: #bcb1a9; font-size: 13px; line-height: 1.5; }

.paper-block { max-width: 900px; }
.paper-block > p { color: var(--muted); font-size: 18px; }
.citation-box { margin-top: 30px; border-left: 4px solid var(--accent); background: var(--paper); box-shadow: var(--shadow); border-radius: 0 18px 18px 0; padding: 22px 24px; display: grid; gap: 6px; }
.citation-box strong { font-size: 12px; color: var(--accent); text-transform: uppercase; letter-spacing: .08em; }
.citation-box span { font-family: Georgia, serif; font-size: 20px; }
.citation-box small { color: var(--muted); }

footer { border-top: 1px solid var(--line); padding: 28px 0 40px; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 24px; color: var(--muted); font-size: 13px; }
.footer-inner > div:first-child { display: flex; gap: 10px; align-items: baseline; }
.footer-inner strong { color: var(--ink); }
.footer-links { display: flex; gap: 18px; }
.footer-links a { text-decoration: none; }

@media (max-width: 900px) {
  .nav-links a:not(.nav-github) { display: none; }
  .hero { padding-top: 80px; }
  .question-card, .split, .source-table-wrap { grid-template-columns: 1fr; gap: 24px; }
  .pipeline { grid-template-columns: 1fr; gap: 14px; }
  .arrow { transform: rotate(90deg); min-height: 24px; }
  .metric-card { min-height: 0; }
  .result-grid { grid-template-columns: 1fr 1fr; }
  .result-card.featured { grid-column: 1 / -1; }
  .artifact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .container { width: min(calc(100% - 28px), var(--container)); }
  .hero h1 { font-size: 42px; }
  .hero-lede { font-size: 17px; }
  .section { padding: 68px 0; }
  .question-card { padding: 26px; }
  .result-grid, .stat-grid { grid-template-columns: 1fr; }
  .result-card.featured, .stat.wide { grid-column: auto; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}