:root {
  --ink: #182523;
  --muted: #5f6d69;
  --paper: #f7f5ef;
  --white: #fffef9;
  --line: #d9ddd6;
  --green: #0b644f;
  --mint: #bcebd5;
  --lime: #dff188;
  --serif: "Newsreader", Georgia, serif;
  --sans: "Manrope", Arial, sans-serif;
  --mono: "DM Mono", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); font-size: 16px; line-height: 1.65; }
a { color: inherit; }
img { display: block; max-width: 100%; }
.section-shell { width: min(1160px, calc(100% - 48px)); margin: 0 auto; }
.band { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--white); }

.nav-wrap { position: sticky; top: 0; z-index: 10; border-bottom: 1px solid rgba(24,37,35,.12); background: rgba(247,245,239,.9); backdrop-filter: blur(12px); }
.nav { width: min(1240px, calc(100% - 40px)); height: 68px; margin: auto; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.wordmark { font-size: .85rem; font-weight: 700; letter-spacing: .14em; text-decoration: none; }
.wordmark span { display: inline-grid; place-items: center; width: 28px; height: 28px; margin-right: 9px; border-radius: 50%; color: white; background: var(--green); letter-spacing: 0; }
.nav-links { display: flex; gap: 30px; }
.nav-links a, .nav-code { font-size: .8rem; font-weight: 600; text-decoration: none; }
.nav-links a:hover { color: var(--green); }
.nav-code { padding: 9px 15px; border: 1px solid var(--ink); border-radius: 999px; }

.hero { padding: 92px 0 72px; }
.eyebrow { font: 500 .72rem/1.2 var(--mono); color: var(--green); letter-spacing: .12em; text-transform: uppercase; }
.kicker { font: 500 .92rem/1.25 var(--mono); color: var(--green); letter-spacing: .1em; text-transform: uppercase; }
.pulse { display: inline-block; width: 8px; height: 8px; margin-right: 9px; border-radius: 50%; background: #23a777; box-shadow: 0 0 0 5px rgba(35,167,119,.13); }
.hero-layout { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(420px, .95fr); align-items: center; gap: 64px; }
.hero-copy h1 { max-width: 720px; margin: 22px 0 25px; font: 600 clamp(2.65rem, 4.6vw, 4.35rem)/1 var(--serif); letter-spacing: -.035em; }
.dek { max-width: 720px; margin: 28px 0 0; color: #42514e; font: 500 clamp(1rem, 1.6vw, 1.16rem)/1.62 var(--sans); }
.authors { margin: 0; font-weight: 600; }
.authors a { text-underline-offset: 4px; }
.authors sup, .affiliation sup { color: var(--green); }
.affiliation { margin: 3px 0 22px; color: var(--muted); font-size: .9rem; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; }
.button { padding: 12px 20px; border-radius: 6px; font-size: .87rem; font-weight: 700; text-decoration: none; }
.primary { color: white; background: var(--green); }
.secondary { border: 1px solid var(--ink); background: transparent; }
.button:hover { transform: translateY(-2px); }
.hero-figure { margin: 0; padding: 24px; border: 1px solid var(--line); border-radius: 10px; background: var(--white); }
.hero-figure img { width: 100%; }
.hero-figure figcaption { margin-top: 16px; color: var(--muted); font-size: .76rem; }
.hero-stats { display: grid; grid-template-columns: repeat(4,1fr); margin-top: 70px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); text-align: left; }
.hero-stats article { display: flex; align-items: center; gap: 17px; padding: 25px 20px; border-right: 1px solid var(--line); }
.hero-stats article:last-child { border-right: 0; }
.hero-stats strong { color: var(--green); font: 600 2.2rem/1 var(--serif); }
.hero-stats span { color: var(--muted); font-size: .72rem; line-height: 1.35; }

.abstract { padding: 100px 0; }
.abstract-grid { display: grid; grid-template-columns: .72fr 1.28fr; gap: 100px; }
.abstract h2 { margin: 13px 0 0; font: 600 clamp(2.3rem, 4vw, 4rem)/1.04 var(--serif); letter-spacing: -.025em; }
.abstract-copy p { margin: 0 0 22px; color: #43514e; font-size: 1.02rem; line-height: 1.78; }
.abstract-copy p:last-child { margin-bottom: 0; }

.problem, .results, .citation { padding: 100px 0; }
.split { display: grid; grid-template-columns: .9fr 1.1fr; gap: 100px; }
.section-heading h2, .takeaways h2, .citation h2 { margin: 13px 0 0; font: 600 clamp(2.3rem, 4vw, 4rem)/1.04 var(--serif); letter-spacing: -.025em; }
.problem-copy article { display: grid; grid-template-columns: 48px 1fr; gap: 18px; padding: 0 0 34px; border-bottom: 1px solid var(--line); }
.problem-copy article + article { padding-top: 34px; }
.index { font: 500 .73rem var(--mono); color: var(--green); }
.problem-copy h3, .steps h3 { margin: 0 0 8px; font-size: 1.08rem; }
.problem-copy p, .steps p { margin: 0; color: var(--muted); }
.figure-card { margin-top: 72px; padding: 24px; border: 1px solid var(--line); border-radius: 10px; background: var(--paper); }
.figure-card img { width: 100%; border-radius: 4px; }
.figure-card p { margin: 18px 0 0; color: var(--muted); font-size: .82rem; }

.method { padding: 110px 0; }
.centered { max-width: 760px; margin: 0 auto; text-align: center; }
.centered > p:last-child { color: var(--muted); }
.method-figure { margin: 58px 0 48px; padding: 28px; border: 1px solid var(--line); border-radius: 10px; background: white; }
.method-figure img { width: 100%; }
.steps { display: grid; grid-template-columns: repeat(4,1fr); border-top: 1px solid var(--line); }
.steps article { padding: 30px 24px 0; border-right: 1px solid var(--line); }
.steps article:last-child { border: 0; }
.steps article > span { display: grid; place-items: center; width: 32px; height: 32px; margin-bottom: 25px; border-radius: 50%; background: var(--mint); font: 500 .78rem var(--mono); }
.steps p { font-size: .88rem; }

.clinical-example { margin-top: 112px; padding-top: 88px; border-top: 1px solid var(--line); }
.example-heading { display: grid; grid-template-columns: 1.2fr .8fr; align-items: end; gap: 80px; margin-bottom: 42px; }
.example-heading h2 { max-width: 720px; margin: 13px 0 0; font: 600 clamp(2.3rem, 4vw, 4rem)/1.04 var(--serif); letter-spacing: -.025em; }
.example-heading > p { margin: 0; color: var(--muted); }
.example-board { display: grid; grid-template-columns: 1.12fr .88fr; gap: 18px; padding: 18px; border: 1px solid var(--line); border-radius: 12px; background: #eef1eb; }
.case-card, .guideline-card, .flow-card { border: 1px solid var(--line); border-radius: 8px; background: var(--white); }
.case-card { padding: 28px; }
.card-label { display: flex; align-items: center; gap: 10px; margin-bottom: 20px; color: var(--green); font: 500 .72rem var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.card-label span { display: grid; place-items: center; width: 26px; height: 26px; border-radius: 50%; color: var(--ink); background: var(--mint); font-size: .67rem; }
.case-card > p { color: #43514e; }
.case-card h3 { margin: 24px 0 14px; font-size: 1rem; }
.answer-options { margin: 0; padding-left: 2.2rem; color: var(--muted); font-size: .78rem; line-height: 1.45; }
.answer-options li { margin-bottom: 7px; padding: 6px 9px; border-radius: 4px; }
.answer-options .correct { color: var(--ink); background: rgba(188,235,213,.55); font-weight: 600; }
.answer-options .correct::marker { color: var(--green); font-weight: 700; }
.reasoning-panel { display: grid; grid-template-rows: auto 1fr; gap: 18px; }
.guideline-card, .flow-card { padding: 28px; }
.guideline-card p { margin: 0; color: #32433f; font: 600 1.06rem/1.55 var(--serif); }
.flow-card { display: flex; flex-direction: column; }
.flow-node { display: grid; grid-template-columns: 34px 1fr; align-items: center; gap: 13px; padding: 15px; border: 1px solid #9ebfb3; border-radius: 7px; background: #f5fbf8; font-size: .84rem; line-height: 1.45; }
.flow-node b { display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; color: white; background: var(--green); font: 500 .74rem var(--mono); }
.flow-node small { display: block; color: var(--green); font-weight: 700; }
.flow-arrow { height: 30px; color: var(--green); text-align: center; font-size: 1.2rem; line-height: 30px; }
.final-answer { display: grid; grid-template-columns: auto 42px 1fr; align-items: center; gap: 12px; margin-top: 2px; padding: 15px; border-radius: 7px; color: white; background: var(--green); }
.final-answer span { font: 500 .68rem var(--mono); letter-spacing: .06em; text-transform: uppercase; }
.final-answer strong { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 50%; color: var(--green); background: var(--lime); font: 700 1.15rem var(--sans); }
.final-answer p { margin: 0; font-size: .76rem; line-height: 1.4; }
.example-caption { margin: 16px 18px 0; color: var(--muted); font-size: .78rem; }
.amega-example { margin-top: 96px; }
.amega-board { display: grid; grid-template-columns: .82fr 1.18fr; gap: 18px; padding: 18px; border: 1px solid var(--line); border-radius: 12px; background: #eef1eb; }
.amega-prompt, .amega-response { padding: 28px; border: 1px solid var(--line); border-radius: 8px; background: var(--white); }
.amega-prompt > p, .amega-response > p { color: #43514e; }
.question-box { margin-top: 28px; padding: 20px; border-left: 4px solid var(--green); border-radius: 0 6px 6px 0; background: #edf8f3; }
.question-box span { display: block; margin-bottom: 8px; color: var(--green); font: 500 .68rem var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.question-box strong { font: 600 1.08rem/1.5 var(--serif); }
.risk-list { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; margin: 18px 0 24px; padding: 0; list-style: none; counter-reset: risk; }
.risk-list li { counter-increment: risk; display: grid; grid-template-columns: 28px 1fr; align-items: center; gap: 9px; min-height: 58px; padding: 10px; border: 1px solid var(--line); border-radius: 6px; color: #344440; font-size: .78rem; line-height: 1.35; }
.risk-list li::before { content: counter(risk); display: grid; place-items: center; width: 26px; height: 26px; border-radius: 50%; color: white; background: var(--green); font: 500 .68rem var(--mono); }
.risk-list small { display: block; color: var(--muted); }
.response-summary { padding: 18px 20px; border-radius: 7px; background: #f2f1ea; color: #43514e; font-size: .79rem; line-height: 1.55; }
.response-summary p { margin: 0 0 12px; }
.response-summary p:last-child { margin-bottom: 0; }

.result-heading { display: grid; grid-template-columns: 1.2fr .8fr; align-items: end; gap: 90px; margin-bottom: 52px; }
.result-heading > p { margin: 0; color: var(--muted); }
.scoreboard { border-top: 2px solid var(--ink); }
.score-head, .score-row { display: grid; grid-template-columns: 1fr 130px 150px 100px; align-items: center; gap: 12px; padding: 18px 16px; border-bottom: 1px solid var(--line); }
.score-head { font: 500 .68rem var(--mono); color: var(--muted); letter-spacing: .08em; text-transform: uppercase; }
.score-row strong { color: var(--green); font: 600 1.65rem var(--serif); }
.score-row em { width: fit-content; padding: 3px 8px; color: var(--green); background: var(--mint); border-radius: 4px; font: 500 .8rem var(--mono); }
.score-row small { display: block; color: var(--muted); }
.table-note { color: var(--muted); font-size: .76rem; }

.takeaways { padding: 110px 0; }
.takeaway-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 100px; }
.takeaway-grid ul { margin: 12px 0 0; padding: 0; list-style: none; }
.takeaway-grid li { padding: 18px 0 18px 28px; border-bottom: 1px solid var(--line); position: relative; color: var(--muted); }
.takeaway-grid li::before { content: "↳"; position: absolute; left: 0; color: var(--green); }

.citation { background: var(--green); color: white; }
.citation .kicker { color: var(--lime); }
.citation-grid { display: grid; grid-template-columns: .8fr 1.2fr; align-items: center; gap: 80px; }
.citation-grid p { color: rgba(255,255,255,.72); }
.code-block { position: relative; overflow-x: auto; padding: 26px; border: 1px solid rgba(255,255,255,.24); border-radius: 8px; background: rgba(5,44,34,.45); }
.code-block pre { margin: 0; font: .8rem/1.7 var(--mono); }
.code-block button { position: absolute; top: 12px; right: 12px; padding: 6px 10px; color: white; border: 1px solid rgba(255,255,255,.4); border-radius: 4px; background: transparent; cursor: pointer; }
footer { padding: 45px 0; background: #101b19; color: rgba(255,255,255,.65); }
.footer-inner { display: grid; grid-template-columns: 1fr 1.3fr 1fr; gap: 40px; align-items: end; font-size: .76rem; }
.footer-inner p:last-child { text-align: right; }
footer strong { color: white; letter-spacing: .1em; }

@media (max-width: 800px) {
  .nav-links { display: none; }
  .section-shell { width: min(100% - 30px, 1160px); }
  .hero { padding-top: 64px; }
  .hero-layout { grid-template-columns: 1fr; gap: 44px; }
  .hero-copy h1 { font-size: clamp(2.55rem, 11vw, 4rem); }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .hero-stats article:nth-child(2) { border-right: 0; }
  .hero-stats article:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .split, .abstract-grid, .result-heading, .takeaway-grid, .citation-grid, .example-heading, .example-board, .amega-board { grid-template-columns: 1fr; gap: 44px; }
  .example-board { gap: 18px; padding: 12px; }
  .amega-board { gap: 18px; padding: 12px; }
  .risk-list { grid-template-columns: 1fr; }
  .clinical-example { margin-top: 80px; padding-top: 70px; }
  .final-answer { grid-template-columns: auto 42px; }
  .final-answer p { grid-column: 1 / -1; }
  .steps { grid-template-columns: 1fr 1fr; }
  .steps article:nth-child(2) { border-right: 0; }
  .steps article:nth-child(-n+2) { padding-bottom: 30px; border-bottom: 1px solid var(--line); }
  .score-head, .score-row { grid-template-columns: 1fr 72px 80px; }
  .score-head span:nth-child(3), .score-row > span:nth-child(3) { display: none; }
  .footer-inner { grid-template-columns: 1fr; gap: 8px; }
  .footer-inner p:last-child { text-align: left; }
}

@media (prefers-reduced-motion: no-preference) {
  .button, .nav a { transition: transform .2s ease, color .2s ease, background .2s ease; }
}