:root {
  --ink: #08151d;
  --ink-soft: #18303c;
  --paper: #f4f0e8;
  --paper-deep: #e8e0d3;
  --cyan: #30e4db;
  --cyan-dark: #087f7a;
  --yellow: #ffd24a;
  --line: rgba(8, 21, 29, 0.18);
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --serif: Iowan Old Style, Baskerville, "Times New Roman", serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:focus-visible { outline: 3px solid var(--yellow); outline-offset: 4px; }
.shell { width: min(1160px, calc(100% - 40px)); margin-inline: auto; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 100; padding: 10px 16px; background: var(--yellow); color: var(--ink); }
.skip-link:focus { top: 16px; }

.site-header { background: var(--ink); color: white; border-bottom: 1px solid rgba(255,255,255,.14); }
.header-inner { min-height: 84px; display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.wordmark { display: inline-flex; align-items: center; gap: 12px; color: white; font-weight: 780; font-size: 1.2rem; letter-spacing: -.03em; text-decoration: none; }
.wordmark-mark { width: 29px; display: grid; gap: 4px; }
.wordmark-mark i { display: block; height: 3px; border-radius: 4px; background: var(--cyan); }
.wordmark-mark i:nth-child(2) { width: 68%; }
.wordmark-mark i:nth-child(3) { width: 84%; background: var(--yellow); }
.site-header nav { display: flex; gap: 28px; }
.site-header nav a { color: rgba(255,255,255,.78); font-size: .82rem; font-weight: 700; letter-spacing: .08em; text-decoration: none; text-transform: uppercase; }
.site-header nav a:hover { color: var(--cyan); }

.hero { min-height: 690px; display: grid; grid-template-columns: 1.08fr .92fr; gap: 70px; align-items: center; padding-block: 84px; }
.eyebrow { margin: 0 0 22px; color: var(--cyan-dark); font-family: var(--mono); font-size: .76rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; }
.hero h1, .page-intro h1, .article-hero h1, .page-heading h1 { margin: 0; font-family: var(--serif); font-size: clamp(4rem, 8vw, 7rem); font-weight: 500; letter-spacing: -.065em; line-height: .86; }
.hero h1 em { color: var(--cyan-dark); font-weight: 500; }
.hero-deck { max-width: 650px; margin: 34px 0; color: var(--ink-soft); font-size: clamp(1.15rem, 2vw, 1.4rem); line-height: 1.5; }
.button { display: inline-flex; align-items: center; gap: 28px; padding: 15px 20px; border: 2px solid var(--ink); background: var(--ink); color: white; font-family: var(--mono); font-size: .78rem; font-weight: 700; letter-spacing: .04em; text-decoration: none; text-transform: uppercase; transition: transform .15s, background .15s, color .15s; }
.button:hover { transform: translate(-3px,-3px); background: var(--cyan); color: var(--ink); box-shadow: 5px 5px 0 var(--ink); }
.hero-visual { align-self: stretch; display: flex; flex-direction: column; justify-content: center; }
.hero-visual img { width: 100%; border: 1px solid var(--line); background: var(--ink); }
.hero-visual p { margin: 18px 0 0; padding-top: 16px; border-top: 1px solid var(--line); font-family: var(--mono); font-size: .78rem; line-height: 1.6; }
.hero-visual strong { display: block; color: var(--cyan-dark); text-transform: uppercase; }

.signal-strip { overflow: hidden; border-block: 1px solid var(--line); background: var(--yellow); }
.signal-track { min-height: 58px; display: flex; align-items: center; justify-content: space-between; gap: 20px; font-family: var(--mono); font-size: .74rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; white-space: nowrap; }
.signal-track i { width: 7px; height: 7px; background: var(--ink); border-radius: 50%; }

.latest { padding-block: 110px 130px; }
.section-heading { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: end; margin-bottom: 54px; }
.section-heading h2, .method h2 { margin: 0; font-family: var(--serif); font-size: clamp(2.8rem, 6vw, 5rem); font-weight: 500; letter-spacing: -.055em; line-height: .96; }
.section-heading > p { max-width: 460px; margin: 0 0 8px; color: var(--ink-soft); font-size: 1.1rem; }
.article-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 48px 28px; }
.article-card { border-top: 1px solid var(--ink); }
.card-image { display: block; margin-top: 14px; overflow: hidden; background: var(--ink); }
.card-image img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; transition: transform .3s ease; }
.article-card:hover .card-image img { transform: scale(1.018); }
.card-body { padding-top: 18px; }
.card-meta { display: flex; justify-content: space-between; gap: 20px; color: var(--cyan-dark); font-family: var(--mono); font-size: .7rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.article-card h3 { margin: 13px 0 10px; font-family: var(--serif); font-size: clamp(1.7rem, 3vw, 2.45rem); font-weight: 500; letter-spacing: -.035em; line-height: 1.06; }
.article-card h3 a, .list-row h2 a { text-decoration: none; }
.article-card p { margin: 0 0 17px; color: var(--ink-soft); }
.text-link { font-family: var(--mono); font-size: .76rem; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; }

.method { padding-block: 110px; background: var(--ink); color: white; }
.method .eyebrow { color: var(--cyan); }
.method-grid { display: grid; grid-template-columns: .55fr 1.45fr .7fr; gap: 50px; align-items: start; }
.method h2 { color: white; }
.method-note { padding-top: 12px; color: rgba(255,255,255,.73); }
.method-note .text-link { color: var(--cyan); }

.page-intro { padding-block: 100px 72px; border-bottom: 1px solid var(--line); }
.page-intro h1, .page-heading h1 { max-width: 920px; font-size: clamp(3.7rem, 7vw, 6.5rem); }
.page-intro > p:last-child, .page-heading > p:last-child { max-width: 670px; margin: 32px 0 0; color: var(--ink-soft); font-size: 1.25rem; }
.article-list { padding-block: 30px 120px; }
.list-row { display: grid; grid-template-columns: 270px 1fr 48px; gap: 34px; align-items: center; padding: 28px 0; border-bottom: 1px solid var(--line); }
.list-image img { aspect-ratio: 16 / 10; object-fit: cover; }
.list-row h2 { margin: 8px 0; font-family: var(--serif); font-size: clamp(1.65rem, 3vw, 2.5rem); font-weight: 500; letter-spacing: -.035em; line-height: 1.05; }
.list-row p { margin: 0; color: var(--ink-soft); }
.row-arrow { font-size: 1.8rem; text-decoration: none; }

.article-hero { display: grid; grid-template-columns: 1.05fr .95fr; gap: 64px; align-items: center; padding-block: 84px; }
.article-hero h1 { font-size: clamp(3.4rem, 6vw, 5.8rem); line-height: .94; }
.article-deck { max-width: 700px; margin: 30px 0 20px; color: var(--ink-soft); font-size: 1.25rem; }
.published { font-family: var(--mono); font-size: .72rem; letter-spacing: .04em; text-transform: uppercase; }
.article-hero img { width: 100%; border: 1px solid var(--line); }
.article-shell { display: grid; grid-template-columns: 250px minmax(0, 720px); gap: 70px; justify-content: center; padding: 44px 0 120px; border-top: 1px solid var(--line); }
.article-aside { align-self: start; position: sticky; top: 28px; padding: 20px 0; border-block: 3px solid var(--ink); }
.article-aside span { color: var(--cyan-dark); font-family: var(--mono); font-size: .72rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.article-aside p { margin-bottom: 0; font-family: var(--serif); font-size: 1.2rem; line-height: 1.35; }
.prose { font-size: 1.08rem; }
.prose h2 { margin: 2.5em 0 .7em; font-family: var(--serif); font-size: 2.35rem; font-weight: 500; letter-spacing: -.035em; line-height: 1.05; }
.prose h3 { margin: 2em 0 .6em; font-size: 1.25rem; }
.prose p, .prose ul, .prose ol { margin: 0 0 1.35em; }
.prose li { margin-bottom: .55em; }
.prose blockquote { margin: 2em 0; padding: 18px 24px; border-left: 5px solid var(--cyan-dark); background: white; font-family: var(--serif); font-size: 1.3rem; }
.prose code { padding: .08em .3em; background: var(--paper-deep); font-family: var(--mono); font-size: .87em; }
.prose a { color: #056763; }
.next-note { padding-block: 54px; background: var(--cyan); }
.next-note-inner { display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.next-note p { margin: 0; font-family: var(--serif); font-size: 2rem; }
.button-light { background: var(--paper); color: var(--ink); }

.page { padding-block: 90px 120px; }
.page-heading { padding-bottom: 52px; border-bottom: 1px solid var(--line); }
.page-prose { max-width: 760px; margin: 52px auto 0; }
.error-page { min-height: 570px; }

.site-footer { padding-block: 70px 30px; background: #030a0e; color: white; }
.footer-grid { display: grid; grid-template-columns: 1fr auto; gap: 60px; }
.wordmark-footer { font-family: var(--serif); font-size: 2.4rem; font-weight: 500; }
.footer-grid p { max-width: 450px; color: rgba(255,255,255,.58); }
.footer-links { display: grid; grid-template-columns: repeat(2, auto); gap: 12px 40px; align-content: start; }
.footer-links a { color: rgba(255,255,255,.78); font-family: var(--mono); font-size: .76rem; text-transform: uppercase; }
.footer-note { display: flex; justify-content: space-between; gap: 20px; margin-top: 54px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.14); color: rgba(255,255,255,.45); font-family: var(--mono); font-size: .68rem; letter-spacing: .06em; text-transform: uppercase; }

@media (max-width: 820px) {
  .shell { width: min(100% - 28px, 680px); }
  .header-inner { min-height: 72px; }
  .site-header nav { gap: 14px; }
  .site-header nav a { font-size: .68rem; }
  .hero, .article-hero { grid-template-columns: 1fr; gap: 48px; min-height: auto; padding-block: 64px; }
  .hero h1 { font-size: clamp(3.8rem, 17vw, 6rem); }
  .signal-track { justify-content: flex-start; overflow: hidden; }
  .section-heading, .method-grid { grid-template-columns: 1fr; gap: 30px; }
  .article-grid { grid-template-columns: 1fr; }
  .list-row { grid-template-columns: 120px 1fr; gap: 18px; }
  .list-row .row-arrow { display: none; }
  .article-shell { grid-template-columns: 1fr; gap: 30px; }
  .article-aside { position: static; }
  .footer-grid { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  body { font-size: 16px; }
  .wordmark-mark { display: none; }
  .site-header nav a:nth-child(2) { display: none; }
  .signal-track i:nth-of-type(n+3), .signal-track span:nth-of-type(n+4) { display: none; }
  .latest { padding-block: 80px; }
  .list-row { grid-template-columns: 1fr; }
  .list-image img { width: 100%; }
  .next-note-inner, .footer-note { align-items: flex-start; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}