:root {
  color-scheme: light;
  --paper: #f4f1e8;
  --paper-deep: #e8e3d6;
  --ink: #202b2d;
  --muted: #5e6c69;
  --line: #c9cec4;
  --teal: #175c58;
  --teal-dark: #104744;
  --coral: #bd573f;
  --gold: #d7b86c;
  --white: #fbfaf6;
  --serif: Georgia, "Times New Roman", serif;
  --sans: "Trebuchet MS", "Segoe UI", sans-serif;
  --mono: "Courier New", monospace;
  --measure: 72rem;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.68 var(--sans);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--teal-dark); text-decoration-thickness: 1px; text-underline-offset: .2em; }
a:hover { color: var(--coral); }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid var(--coral); outline-offset: 3px; }
img, svg { max-width: 100%; }
.skip-link { position: absolute; left: 1rem; top: -5rem; background: var(--ink); color: var(--white); padding: .7rem 1rem; z-index: 10; }
.skip-link:focus { top: 1rem; }
.site-header { border-bottom: 1px solid var(--line); background: rgba(244,241,232,.96); position: relative; z-index: 5; }
.header-inner { max-width: var(--measure); margin: auto; padding: 1rem 1.25rem; display: flex; justify-content: space-between; align-items: center; gap: 1.5rem; }
.brand { color: var(--ink); text-decoration: none; display: inline-flex; align-items: center; gap: .72rem; font: 700 .95rem/1.12 var(--sans); letter-spacing: -.025em; max-width: 14rem; }
.brand svg { width: 2.35rem; flex: none; }
.brand span { display: block; }
.menu-toggle { display: none; border: 1px solid var(--line); background: transparent; padding: .6rem .8rem; color: var(--ink); font: 700 .76rem var(--mono); text-transform: uppercase; }
.primary-nav { display: flex; align-items: center; gap: clamp(.7rem, 2vw, 1.6rem); }
.primary-nav a { color: var(--ink); text-decoration: none; font-size: .83rem; font-weight: 700; }
.primary-nav a:hover, .primary-nav a[aria-current="page"] { color: var(--coral); }
.page-wrap { max-width: var(--measure); margin: auto; padding: 0 1.25rem; }
.eyebrow { color: var(--teal); font: 700 .7rem/1.3 var(--mono); letter-spacing: .16em; text-transform: uppercase; }
.hero { padding: clamp(3rem, 8vw, 7.5rem) 0 4rem; display: grid; grid-template-columns: 1.08fr .92fr; gap: clamp(2rem, 6vw, 5.5rem); align-items: center; }
.hero h1 { margin: .8rem 0 1.2rem; max-width: 11ch; font: 400 clamp(3.35rem, 8vw, 7.8rem)/.91 var(--serif); letter-spacing: -.065em; }
.hero-copy { max-width: 35rem; color: var(--muted); font-size: 1.08rem; }
.hero-copy strong { color: var(--ink); }
.hero-art { position: relative; min-height: 23rem; display: grid; place-items: center; background: var(--teal); overflow: hidden; }
.hero-art:before, .hero-art:after { content: ""; position: absolute; border: 1px solid rgba(251,250,246,.26); border-radius: 50%; width: 22rem; height: 22rem; }
.hero-art:after { width: 16rem; height: 16rem; }
.diagram { position: relative; z-index: 1; width: min(85%, 26rem); }
.hero-caption { position: absolute; bottom: 1rem; left: 1.2rem; color: #e3e9df; font: .69rem var(--mono); letter-spacing: .1em; text-transform: uppercase; }
.hero-cta { display: inline-flex; align-items: center; gap: .7rem; margin-top: 1.1rem; padding: .85rem 1rem; background: var(--coral); color: var(--white); text-decoration: none; font-weight: 700; }
.hero-cta:hover { color: var(--white); background: #98422f; }
.section { padding: 3.6rem 0; border-top: 1px solid var(--line); }
.section-head { display: flex; justify-content: space-between; gap: 2rem; align-items: end; margin-bottom: 2rem; }
.section h2, .prose h2 { font: 400 clamp(2rem, 4vw, 3.5rem)/1.04 var(--serif); letter-spacing: -.04em; margin: .4rem 0 .8rem; }
.section-intro { max-width: 34rem; color: var(--muted); margin: 0; }
.feature-grid { display: grid; grid-template-columns: repeat(12,1fr); gap: 1rem; }
.feature { min-height: 14rem; grid-column: span 4; border-top: 3px solid var(--teal); padding: 1rem 1.15rem 1.25rem; background: #ece9df; display: flex; flex-direction: column; }
.feature:nth-child(3n+2) { border-color: var(--coral); background: #eee5dc; }
.feature:nth-child(3n) { border-color: var(--gold); background: #e8e8dc; }
.feature .number { color: var(--muted); font: .72rem var(--mono); }
.feature h3 { margin: 1.6rem 0 .45rem; font: 400 1.55rem/1.1 var(--serif); }
.feature p { color: var(--muted); margin: 0 0 1rem; font-size: .93rem; }
.feature a { margin-top: auto; font-size: .86rem; font-weight: 700; }
.pathway { display: grid; grid-template-columns: .8fr 1.2fr; gap: 4rem; align-items: start; background: var(--ink); color: var(--paper); padding: clamp(2rem, 5vw, 4rem); }
.pathway h2 { font-size: clamp(2.3rem, 5vw, 4rem); max-width: 8ch; }
.pathway p { color: #cbd4cc; }
.pathway-list { list-style: none; padding: 0; margin: 0; counter-reset: stage; }
.pathway-list li { counter-increment: stage; border-top: 1px solid #586360; padding: 1rem 0; display: grid; grid-template-columns: 3rem 1fr; gap: .5rem; }
.pathway-list li:before { content: "0" counter(stage); color: var(--gold); font: .75rem var(--mono); padding-top: .25rem; }
.pathway-list a { color: var(--paper); text-decoration: none; font: 400 1.4rem/1.2 var(--serif); }
.pathway-list small { display: block; color: #b8c5bf; font: .85rem/1.5 var(--sans); margin-top: .4rem; }
.article-hero { padding: 4.5rem 0 2rem; max-width: 54rem; }
.article-hero h1, .page-heading h1 { font: 400 clamp(2.8rem, 7vw, 5.5rem)/.98 var(--serif); letter-spacing: -.055em; margin: .65rem 0 1.2rem; }
.article-hero .dek, .page-heading .dek { color: var(--muted); font-size: 1.15rem; max-width: 44rem; }
.article-meta { color: var(--muted); font: .72rem var(--mono); text-transform: uppercase; letter-spacing: .1em; }
.reading-layout { display: grid; grid-template-columns: minmax(0, 44rem) minmax(12rem, 1fr); gap: 4rem; align-items: start; padding: 2rem 0 5rem; }
.prose { font-size: 1.04rem; }
.prose > p:first-child { font-size: 1.16rem; color: #384845; }
.prose h2 { margin-top: 2.7rem; font-size: 2.2rem; }
.prose h3 { font: 700 1.2rem var(--sans); margin: 2rem 0 .6rem; }
.prose p { margin: 0 0 1.15rem; }
.prose ul, .prose ol { padding-left: 1.35rem; }
.prose li { margin: .5rem 0; padding-left: .25rem; }
.note { background: #e5e9df; border-left: 4px solid var(--teal); padding: 1.2rem 1.3rem; margin: 1.8rem 0; color: #33413e; }
.note strong { color: var(--teal-dark); }
.toc { position: sticky; top: 1.5rem; border-top: 2px solid var(--coral); padding-top: 1rem; font-size: .88rem; }
.toc strong { display: block; font: .7rem var(--mono); text-transform: uppercase; letter-spacing: .12em; margin-bottom: .75rem; }
.toc a { display: block; margin: .55rem 0; color: var(--muted); }
.page-heading { padding: 4.5rem 0 2.4rem; max-width: 57rem; }
.page-heading h1 { max-width: 14ch; }
.index-list { border-top: 1px solid var(--line); }
.index-row { display: grid; grid-template-columns: 5rem 1fr 2rem; gap: 1rem; border-bottom: 1px solid var(--line); padding: 1.35rem 0; align-items: start; text-decoration: none; color: var(--ink); }
.index-row:hover .index-title { color: var(--coral); }
.index-no { color: var(--teal); font: .72rem var(--mono); padding-top: .35rem; }
.index-title { font: 400 clamp(1.25rem, 2.6vw, 1.8rem)/1.12 var(--serif); }
.index-desc { color: var(--muted); display: block; font-size: .9rem; margin-top: .35rem; }
.index-arrow { font-size: 1.5rem; color: var(--coral); }
.topic-band { display: flex; flex-wrap: wrap; gap: .6rem; padding: 1.5rem 0; }
.topic-band a { display: inline-block; border: 1px solid var(--line); padding: .45rem .75rem; text-decoration: none; font-size: .83rem; }
.topic-band a:hover { border-color: var(--teal); background: #e5e9df; }
.quote-block { margin: 2rem 0; padding: 1.6rem 2rem; border-left: 3px solid var(--coral); font: italic 1.6rem/1.35 var(--serif); background: #eee9df; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); padding: 1rem 0; }
.faq-list summary { cursor: pointer; font: 400 1.3rem/1.3 var(--serif); list-style-position: outside; }
.faq-list details p { color: var(--muted); max-width: 50rem; margin: .7rem 0 .3rem; }
.site-footer { margin-top: 3rem; padding: 3rem 0 1.5rem; background: #202b2d; color: #e7e9df; }
.footer-inner { max-width: var(--measure); padding: 0 1.25rem; margin: auto; }
.footer-top { display: grid; grid-template-columns: 1.1fr 1fr 1fr; gap: 2rem; padding-bottom: 2.3rem; }
.footer-brand { color: #f5f1e8; font: 400 1.65rem/1.05 var(--serif); max-width: 12ch; }
.footer-label { color: #b8c5bf; font: .68rem var(--mono); letter-spacing: .13em; text-transform: uppercase; }
.footer-links { display: grid; grid-template-columns: 1fr 1fr; gap: .55rem 1rem; margin-top: .75rem; }
.footer-links a, .footer-email { color: #f1eee5; font-size: .88rem; }
.footer-disclaimer { border-top: 1px solid #596361; border-bottom: 1px solid #596361; padding: 1.1rem 0; color: #d5d9d0; font-size: .84rem; }
.footer-bottom { display: flex; justify-content: space-between; gap: 1rem; padding-top: 1rem; color: #b8c5bf; font: .69rem var(--mono); }
.callout { background: var(--teal); color: var(--white); padding: 1.5rem; margin: 2rem 0; }
.callout a { color: var(--white); }
.two-column { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
.glossary-list { display: grid; grid-template-columns: 8rem 1fr; border-top: 1px solid var(--line); }
.glossary-list dt, .glossary-list dd { border-bottom: 1px solid var(--line); padding: .9rem 0; margin: 0; }
.glossary-list dt { color: var(--teal-dark); font: 700 .82rem var(--mono); }
.data-table-wrap { overflow-x: auto; margin: 1.5rem 0; }
table { width: 100%; border-collapse: collapse; min-width: 35rem; font-size: .88rem; }
th, td { text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); padding: .8rem; }
th { background: #e5e9df; color: var(--teal-dark); font: 700 .72rem var(--mono); text-transform: uppercase; letter-spacing: .08em; }
.back-link { display: inline-block; margin: 1.5rem 0; font-size: .88rem; }
@media (max-width: 760px) {
  body { font-size: 16px; }
  .header-inner { flex-wrap: wrap; }
  .menu-toggle { display: inline-block; }
  .primary-nav { display: none; width: 100%; flex-direction: column; align-items: stretch; gap: 0; padding-top: .5rem; }
  .primary-nav.is-open { display: flex; }
  .primary-nav a { padding: .75rem .2rem; border-top: 1px solid var(--line); }
  .hero { grid-template-columns: 1fr; padding-top: 3rem; gap: 2rem; }
  .hero h1 { max-width: 10ch; font-size: clamp(3.5rem, 17vw, 6rem); }
  .hero-art { min-height: 18rem; }
  .feature { grid-column: span 12; min-height: 12rem; }
  .section-head { display: block; }
  .pathway { grid-template-columns: 1fr; gap: 1rem; }
  .reading-layout { grid-template-columns: 1fr; gap: 1.5rem; }
  .toc { position: static; order: -1; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1/-1; }
}
@media (max-width: 460px) {
  .page-wrap { padding: 0 1rem; }
  .header-inner { padding-inline: 1rem; }
  .index-row { grid-template-columns: 2.7rem 1fr 1rem; gap: .6rem; }
  .footer-top { grid-template-columns: 1fr; }
  .footer-brand { grid-column: auto; }
  .footer-bottom { flex-direction: column; }
  .glossary-list { grid-template-columns: 6rem 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *:before, *:after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}