:root {
  --ink: #142638;
  --muted: #5d6b77;
  --paper: #f5f3ec;
  --paper-2: #ebe8df;
  --white: #fffef9;
  --teal: #15a39a;
  --teal-dark: #0b756f;
  --coral: #d97757;
  --amber: #c59235;
  --line: #d4d1c7;
  --navy: #0b1a29;
  --shadow: 0 24px 60px rgba(20, 38, 56, .09);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; line-height: 1.55; }
a { color: var(--teal-dark); text-underline-offset: 3px; }
a:hover { color: var(--coral); }
.skip { position: absolute; top: -60px; left: 16px; padding: 10px 14px; background: var(--ink); color: white; z-index: 100; }
.skip:focus { top: 10px; }
.topbar { position: sticky; top: 0; z-index: 50; background: rgba(245,243,236,.94); border-bottom: 1px solid rgba(20,38,56,.12); backdrop-filter: blur(16px); }
.topbar-inner { max-width: 1240px; margin: auto; min-height: 60px; padding: 0 24px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 800; letter-spacing: -.02em; }
.brand i { display: grid; place-items: center; width: 30px; height: 30px; border-radius: 9px; color: white; background: linear-gradient(145deg, var(--teal), var(--teal-dark)); font-style: normal; }
.nav { display: flex; flex-wrap: wrap; gap: 16px; font-size: 13px; }
.nav a { color: var(--muted); text-decoration: none; }
.hero { position: relative; overflow: hidden; background: var(--navy); color: white; }
.hero::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px); background-size: 44px 44px; mask-image: linear-gradient(to bottom, black, transparent 85%); }
.hero::after { content: ""; position: absolute; width: 580px; height: 580px; right: -160px; top: -250px; border-radius: 50%; background: radial-gradient(circle, rgba(21,163,154,.52), transparent 68%); }
.hero-inner { position: relative; z-index: 2; max-width: 1240px; margin: auto; padding: 94px 24px 72px; display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(280px, .6fr); gap: 70px; align-items: end; }
.eyebrow { margin: 0 0 14px; color: #77d6cc; text-transform: uppercase; letter-spacing: .13em; font-size: 12px; font-weight: 800; }
.hero h1 { max-width: 880px; margin: 0; font-size: clamp(42px, 6.2vw, 82px); line-height: .98; letter-spacing: -.055em; }
.hero .dek { max-width: 770px; margin: 28px 0 0; color: #ced7df; font-size: clamp(17px, 2vw, 22px); line-height: 1.5; }
.hero-meta { display: grid; gap: 12px; }
.hero-meta div { padding: 15px 0; border-top: 1px solid rgba(255,255,255,.2); }
.hero-meta span { display: block; color: #8ea0af; font-size: 11px; text-transform: uppercase; letter-spacing: .11em; }
.hero-meta strong { display: block; margin-top: 5px; font-size: 16px; }
.warning-strip { background: #f0c96d; color: #30230b; }
.warning-strip p { max-width: 1240px; margin: auto; padding: 15px 24px; font-size: 14px; }
main { max-width: 1240px; margin: auto; padding: 0 24px 90px; }
section { padding: 84px 0; border-bottom: 1px solid var(--line); }
.section-head { display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, 450px); gap: 60px; align-items: end; margin-bottom: 38px; }
.section-head h2 { margin: 0; max-width: 760px; font-size: clamp(32px, 4vw, 54px); line-height: 1.04; letter-spacing: -.045em; }
.section-head > p { margin: 0; color: var(--muted); font-size: 17px; }
.kicker { margin: 0 0 10px; color: var(--teal-dark); text-transform: uppercase; letter-spacing: .12em; font-weight: 800; font-size: 11px; }
.decision-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.decision { min-height: 220px; padding: 24px; border: 1px solid var(--line); border-radius: 18px; background: var(--white); box-shadow: 0 10px 32px rgba(20,38,56,.04); }
.decision.go { background: var(--teal-dark); color: white; border-color: var(--teal-dark); }
.decision span { display: inline-flex; align-items: center; justify-content: center; min-width: 40px; height: 25px; padding: 0 9px; border-radius: 99px; background: var(--paper-2); color: var(--muted); font-size: 10px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.decision.go span { background: rgba(255,255,255,.15); color: white; }
.decision h3 { margin: 34px 0 9px; font-size: 21px; line-height: 1.12; letter-spacing: -.025em; }
.decision p { margin: 0; color: var(--muted); font-size: 14px; }
.decision.go p { color: #cce2df; }
.metric-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 18px; overflow: hidden; }
.metric { padding: 26px; background: var(--white); }
.metric span { display: block; color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .08em; }
.metric strong { display: block; margin: 9px 0 6px; font-size: 38px; line-height: 1; letter-spacing: -.04em; }
.metric small { display: block; color: var(--muted); }
.metric.alert strong { color: var(--coral); }
.figure-card { margin-top: 26px; padding: 20px; background: var(--white); border: 1px solid var(--line); border-radius: 18px; box-shadow: var(--shadow); }
.figure-card img { display: block; width: 100%; height: auto; }
.figure-card figcaption { padding: 10px 12px 4px; color: var(--muted); font-size: 13px; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 16px; background: var(--white); }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th { padding: 13px 14px; background: var(--navy); color: white; text-align: left; font-size: 11px; letter-spacing: .06em; text-transform: uppercase; white-space: nowrap; }
td { padding: 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
tr:last-child td { border-bottom: 0; }
tr.winner td { background: #e5f3f0; }
.inline-note { margin: 22px 0 0; padding: 18px 20px; border-left: 4px solid var(--coral); background: #f4e6df; color: #573124; border-radius: 0 12px 12px 0; }
.origin-legend { display: flex; flex-wrap: wrap; gap: 10px; margin: 20px 0 0; }
.origin-badge { display: inline-flex; align-items: center; border-radius: 999px; padding: 7px 11px; font-size: 11px; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; }
.origin-badge.empirical { background: #d7eee8; color: #0b625c; }
.origin-badge.synthetic { background: #f5ddd3; color: #9b3f2a; }
.origin-badge.published { background: #dce5ef; color: #38536f; }
.origin-badge.calculation { background: #eee7ce; color: #65521e; }
.audit-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 24px; }
.audit-card { border: 1px solid var(--line); border-radius: 14px; padding: 18px; background: #fff; }
.audit-card h3 { margin: 8px 0; font-size: 18px; }
.audit-card p { margin: 0; color: var(--muted); font-size: 14px; }
.audit-card .origin-badge { padding: 5px 8px; font-size: 9px; }
.plain-boundary { margin-top: 24px; border: 2px solid #d97757; border-radius: 16px; padding: 20px; background: #fffaf7; }
.plain-boundary h3 { margin: 0 0 10px; }
.plain-boundary p { margin: 7px 0; }
.architecture { display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px; counter-reset: architecture; }
.architecture article { position: relative; min-height: 180px; padding: 20px; border-radius: 16px; background: var(--white); border: 1px solid var(--line); }
.architecture article::before { counter-increment: architecture; content: "0" counter(architecture); display: block; margin-bottom: 32px; color: var(--teal-dark); font-size: 12px; font-weight: 800; }
.architecture article:not(:last-child)::after { content: "→"; position: absolute; right: -20px; top: 45%; z-index: 2; width: 26px; height: 26px; display: grid; place-items: center; border-radius: 50%; background: var(--paper); color: var(--coral); font-weight: 900; }
.architecture h3 { margin: 0 0 8px; font-size: 16px; }
.architecture p { margin: 0; color: var(--muted); font-size: 12px; }
.method-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.method-card { padding: 24px; background: var(--white); border: 1px solid var(--line); border-radius: 17px; }
.method-card header { display: flex; justify-content: space-between; gap: 10px; align-items: start; }
.method-card h3 { margin: 0; font-size: 20px; }
.readiness { padding: 5px 9px; border-radius: 99px; font-size: 10px; font-weight: 800; text-transform: uppercase; letter-spacing: .06em; background: #dfeeea; color: var(--teal-dark); white-space: nowrap; }
.readiness.research { background: #f2e7cf; color: #7b5617; }
.readiness.later { background: #eee1dd; color: #83452f; }
.method-card p { color: var(--muted); font-size: 14px; }
.method-card dl { margin: 18px 0 0; display: grid; gap: 12px; }
.method-card dl div { border-top: 1px solid var(--line); padding-top: 10px; }
.method-card dt { color: var(--muted); font-size: 10px; text-transform: uppercase; letter-spacing: .08em; }
.method-card dd { margin: 4px 0 0; font-size: 13px; }
.llm-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 20px; }
.verdict { padding: 30px; border-radius: 20px; background: var(--navy); color: white; }
.verdict h3 { margin: 0 0 14px; font-size: 30px; line-height: 1.06; }
.verdict p { color: #bdcbd6; }
.verdict ul { padding-left: 20px; color: #d9e4eb; }
.experiment-list { display: grid; gap: 10px; }
.experiment { display: grid; grid-template-columns: 42px 1fr auto; gap: 14px; align-items: center; padding: 15px 18px; border-radius: 13px; background: var(--white); border: 1px solid var(--line); }
.experiment b { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 10px; background: var(--paper-2); color: var(--teal-dark); }
.experiment strong, .experiment small { display: block; }
.experiment small { color: var(--muted); }
.experiment em { max-width: 210px; color: var(--coral); font-style: normal; font-size: 12px; font-weight: 700; text-align: right; }
.roadmap { display: grid; gap: 0; }
.phase { display: grid; grid-template-columns: 150px 1fr 220px; gap: 26px; padding: 28px 0; border-top: 1px solid var(--line); }
.phase:first-child { border-top: 0; }
.phase .when { color: var(--teal-dark); font-size: 12px; text-transform: uppercase; letter-spacing: .09em; font-weight: 800; }
.phase h3 { margin: 0 0 7px; font-size: 23px; }
.phase p { margin: 0; color: var(--muted); }
.gate { padding: 15px; border-radius: 12px; background: var(--white); border: 1px solid var(--line); font-size: 12px; }
.gate strong { display: block; color: var(--coral); text-transform: uppercase; letter-spacing: .08em; font-size: 10px; margin-bottom: 5px; }
.dataset-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.dataset-card { padding: 25px; border-radius: 17px; background: var(--white); border: 1px solid var(--line); }
.dataset-top { display: flex; justify-content: space-between; gap: 12px; font-size: 11px; }
.dataset-top span { color: var(--coral); font-weight: 800; }
.dataset-card h3 { margin: 28px 0 8px; font-size: 21px; }
.dataset-card > p { color: var(--muted); }
.dataset-card dl { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.dataset-card dt { color: var(--muted); font-size: 10px; text-transform: uppercase; letter-spacing: .07em; }
.dataset-card dd { margin: 3px 0 0; font-size: 12px; }
.calculator { display: grid; grid-template-columns: 1fr .82fr; gap: 22px; }
.calculator-controls { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; padding: 24px; border: 1px solid var(--line); border-radius: 17px; background: var(--white); }
.field label { display: block; margin-bottom: 5px; color: var(--muted); font-size: 11px; font-weight: 700; }
.field div { display: flex; align-items: center; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.field input { width: 100%; min-width: 0; padding: 10px; border: 0; background: transparent; color: var(--ink); font: inherit; }
.field span { padding: 0 10px; color: var(--muted); font-size: 11px; }
.cost-output { padding: 30px; border-radius: 17px; background: var(--teal-dark); color: white; }
.cost-output span { display: block; color: #b7dbd7; text-transform: uppercase; letter-spacing: .09em; font-size: 11px; }
.cost-output strong { display: block; margin: 9px 0; font-size: 54px; letter-spacing: -.05em; }
.cost-output p { color: #cce4e1; font-size: 13px; }
.cost-breakdown { margin-top: 18px; padding-top: 15px; border-top: 1px solid rgba(255,255,255,.2); display: grid; gap: 5px; font-size: 12px; }
.cost-breakdown div { display: flex; justify-content: space-between; gap: 20px; }
.evidence-tools { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 18px; }
.evidence-tools input, .evidence-tools select { min-height: 42px; padding: 0 12px; border: 1px solid var(--line); border-radius: 10px; background: var(--white); color: var(--ink); font: inherit; }
.evidence-tools input { flex: 1 1 320px; }
.evidence-table td:nth-child(2) { min-width: 260px; }
.evidence-table td:nth-child(3) { min-width: 260px; }
.evidence-table td:nth-child(4) { min-width: 410px; }
.evidence-table small, .evidence-table span, .evidence-table em { display: block; margin-top: 5px; }
.evidence-table small { color: var(--muted); }
.evidence-table em { padding: 8px 10px; border-radius: 8px; background: #f4e6df; color: #6e3e2d; font-style: normal; }
.year { display: inline-block; padding: 4px 7px; border-radius: 7px; background: var(--paper-2); font-weight: 800; }
.download-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
.download-card { min-height: 110px; padding: 17px; display: flex; flex-direction: column; justify-content: space-between; border: 1px solid var(--line); border-radius: 13px; background: var(--white); text-decoration: none; }
.download-card strong { color: var(--ink); }
.download-card span { color: var(--muted); font-size: 11px; }
.source-note { margin-top: 20px; color: var(--muted); font-size: 13px; }
footer { background: var(--navy); color: #c6d0d8; }
.footer-inner { max-width: 1240px; margin: auto; padding: 45px 24px; display: flex; justify-content: space-between; gap: 50px; }
.footer-inner strong { color: white; }
.footer-inner p { max-width: 720px; margin: 0; }
.footer-inner span { color: #8294a2; font-size: 12px; white-space: nowrap; }
@media (max-width: 980px) {
  .hero-inner, .section-head, .llm-layout, .calculator { grid-template-columns: 1fr; gap: 28px; }
  .decision-grid, .metric-grid, .audit-grid { grid-template-columns: repeat(2, 1fr); }
  .architecture { grid-template-columns: repeat(3, 1fr); }
  .architecture article:nth-child(3)::after { display: none; }
  .method-grid { grid-template-columns: repeat(2, 1fr); }
  .download-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 680px) {
  .nav { display: none; }
  .hero-inner { padding-top: 68px; }
  section { padding: 62px 0; }
  .decision-grid, .metric-grid, .method-grid, .dataset-grid, .download-grid, .audit-grid { grid-template-columns: 1fr; }
  .architecture { grid-template-columns: 1fr; }
  .architecture article::after { display: none !important; }
  .experiment { grid-template-columns: 36px 1fr; }
  .experiment em { grid-column: 2; text-align: left; }
  .phase { grid-template-columns: 1fr; gap: 10px; }
  .calculator-controls { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; }
  .footer-inner span { white-space: normal; }
}
@media print {
  .topbar, .evidence-tools { display: none; }
  body { background: white; }
  main { max-width: none; }
  section { break-inside: avoid; }
  .hero { print-color-adjust: exact; -webkit-print-color-adjust: exact; }
}