:root {
  color-scheme: light;
  --paper: #f4f2ec;
  --ink: #20251f;
  --green: #245b43;
  --deep-green: #123d2d;
  --rust: #a7452e;
  --muted: #586159;
  --line: #bac6bb;
  --soft-green: #dbe7dc;
  --space: clamp(24px, 4.3vw, 68px);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
  color: var(--ink);
  background: var(--paper);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body { margin: 0; line-height: 1.55; }
a { color: inherit; text-underline-offset: .22em; }
a:hover { color: var(--rust); }
a:focus-visible, summary:focus-visible { outline: 3px solid var(--rust); outline-offset: 5px; }
p { margin: 0 0 1em; }
h1, h2, h3 { margin: 0; }
h2 { font-size: clamp(30px, 3.3vw, 48px); font-weight: 700; line-height: 1.1; letter-spacing: -.04em; }
h3 { font-size: 20px; line-height: 1.3; letter-spacing: -.02em; }
figure, dl, dd { margin: 0; }
.page { max-width: 1536px; padding: 0 var(--space); margin: auto; }
.skip-link { position: absolute; left: 20px; top: -100px; z-index: 2; padding: 12px 18px; background: var(--paper); }
.skip-link:focus { top: 12px; }
.header { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 90px; border-bottom: 1px solid var(--green); }
.wordmark { font-size: 24px; font-weight: 800; text-decoration: none; letter-spacing: -.06em; }
.wordmark > span { color: var(--rust); }
nav { display: flex; flex-wrap: wrap; gap: 12px 32px; }
nav a { font-size: 15px; text-decoration: none; padding: 10px 0; }
.hero { display: grid; grid-template-columns: 1.07fr 1fr; align-items: center; gap: clamp(28px, 5vw, 84px); padding: 58px 0 44px; }
.full-name { display: block; font-size: clamp(17px, 1.6vw, 23px); line-height: 1.35; color: var(--deep-green); letter-spacing: -.025em; }
.acronym { display: block; font-size: clamp(65px, 7.2vw, 104px); font-weight: 800; line-height: 1.1; color: var(--deep-green); letter-spacing: -.06em; margin: 4px 0 12px; }
.hero-title { font-size: clamp(29px, 3vw, 44px); font-weight: 700; line-height: 1.12; letter-spacing: -.04em; margin-bottom: 24px; }
.lead { font-size: clamp(18px, 1.55vw, 22px); max-width: 510px; line-height: 1.45; margin-bottom: 26px; }
.button { display: inline-flex; align-items: center; gap: 28px; padding: 16px 24px; border: 1px solid var(--rust); background: var(--rust); color: #fff; border-radius: 3px; font-size: 16px; font-weight: 700; text-decoration: none; }
.button:hover { background: #883622; color: #fff; }
.button span { font-size: 25px; line-height: 1; }
.foundation-note { color: var(--muted); font-size: 14px; margin: 22px 0 0; }
.diagram-pair { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 40px; }
.diagram-node { display: flex; gap: 13px; align-items: center; padding: 18px 14px; border: 1px solid var(--green); border-radius: 3px; min-height: 98px; }
.diagram-node strong { display: block; font-size: 17px; color: var(--deep-green); line-height: 1.3; }
.diagram-node div > span { display: block; font-size: 12px; line-height: 1.4; margin-top: 5px; }
.node-symbol { font-size: 30px; color: var(--green); line-height: 1; }
.diagram-arrows { display: flex; justify-content: space-around; height: 45px; align-items: center; font-size: 30px; color: var(--green); }
.state-core { background: var(--green); color: #fff; text-align: center; padding: 27px 20px; margin: 0 25px; border-radius: 3px; }
.state-core > strong { display: block; font-size: clamp(22px, 2vw, 29px); line-height: 1.2; font-weight: 600; }
.state-core ul { list-style: none; margin: 24px 0 0; padding: 0; display: flex; justify-content: space-between; gap: 8px; font-size: 13px; }
.state-core li { padding-top: 8px; border-top: 1px solid #91b29e; }
figcaption { text-align: center; color: var(--muted); font-size: 12px; margin-top: 22px; }
.problem-strip { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; padding: 24px 0 36px; max-width: 1160px; color: var(--muted); }
.problem-strip p { margin: 0; font-size: 16px; }
.section { padding: 36px 0 44px; border-top: 1px solid var(--green); }
.section-label { text-transform: uppercase; font-size: 12px; font-weight: 700; letter-spacing: .09em; color: var(--green); margin-bottom: 14px; }
.architecture-layout { display: grid; grid-template-columns: 2.4fr 1fr; gap: 36px; }
.architecture-note { margin-top: 8px; padding: 6px 0 0 30px; border-left: 1px solid var(--line); }
.architecture-note p { font-size: 16px; line-height: 1.5; }
.accent-text { color: var(--rust); font-weight: 700; }
.provider-diagram { margin-top: 30px; }
.core-band { background: var(--green); color: #fff; text-align: center; padding: 17px; border-radius: 3px; }
.core-band strong { font-size: 21px; display: block; line-height: 1.4; }
.core-band span { font-size: 13px; }
.providers { list-style: none; padding: 0; margin: 34px 0 0; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 12px; }
.providers li { position: relative; min-width: 0; text-align: center; padding: 17px 5px; border: 1px solid #8fa897; border-radius: 2px; }
.providers li > span { position: absolute; top: -38px; left: calc(50% - 8px); color: var(--green); font-size: 28px; }
.providers strong { display: block; font-size: 12px; line-height: 1.4; overflow-wrap: anywhere; }
.providers small { display: block; font-size: 12px; line-height: 1.35; margin-top: 8px; }
.reading-note { border-top: 1px solid var(--line); margin-top: 28px; }
.reading-note + .reading-note { margin-top: 0; }
summary { padding: 19px 4px; cursor: pointer; font-size: 16px; font-weight: 600; }
summary:hover { color: var(--green); }
.reading-note > div { max-width: 900px; padding: 0 24px 12px; font-size: 16px; }
.section-intro { max-width: 820px; margin: 20px 0 25px; color: var(--muted); }
.workflow-list { list-style: none; margin: 28px 0 30px; padding: 0; }
.workflow-list > li { display: flex; align-items: center; gap: 30px; padding: 18px 0; border-top: 1px solid var(--line); }
.workflow-list > li:last-child { border-bottom: 1px solid var(--line); }
.workflow-number { background: var(--soft-green); color: var(--deep-green); display: grid; place-items: center; font-size: 20px; font-weight: 600; width: 44px; height: 44px; flex-shrink: 0; border-radius: 2px; }
.workflow-steps { display: flex; align-items: center; flex-wrap: wrap; gap: 14px clamp(16px, 2.2vw, 32px); font-size: 17px; }
.workflow-steps b { color: var(--green); font-size: 23px; font-weight: 400; }
.work-distinction { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; }
.work-distinction h3 { margin-bottom: 10px; }
.work-distinction p { color: var(--muted); font-size: 16px; max-width: 530px; }
.evidence-line { color: var(--green); font-size: 15px; margin: 14px 0 0; max-width: 960px; }
.evidence-line strong { white-space: nowrap; }
.control-layout { display: grid; grid-template-columns: 2fr 1fr; gap: 38px; margin-top: 28px; }
.modes { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin-bottom: 24px; }
.modes > div { border: 1px solid #8fa897; padding: 16px 13px; border-radius: 2px; }
.modes dt { color: var(--deep-green); font-size: 12px; font-weight: 700; }
.modes dd { font-size: 14px; line-height: 1.45; margin-top: 10px; color: var(--muted); }
.control-layout p { font-size: 16px; }
.control-note { border-left: 1px solid var(--line); padding: 0 0 0 30px; }
.control-note h3 { color: var(--green); margin-bottom: 18px; font-size: 25px; }
.status-columns { display: grid; grid-template-columns: 1fr 1fr 1fr; margin-top: 30px; gap: 30px; }
.status-columns > div + div { border-left: 1px solid var(--line); padding-left: 30px; }
.status-index { color: var(--green); font-size: 10px; font-weight: 700; letter-spacing: .03em; }
.status-columns h3 { margin: 13px 0 12px; font-size: 22px; }
.status-columns p { color: var(--muted); font-size: 16px; margin: 0; }
.source-note { margin-top: 36px; padding: 24px 0 0; border-top: 1px solid var(--line); max-width: 900px; }
.source-note h3 { margin-bottom: 14px; }
.source-note p { font-size: 15px; color: var(--muted); }
code { font-size: .95em; overflow-wrap: anywhere; }
.footer { padding: 26px 0 36px; border-top: 1px solid var(--green); display: flex; align-items: center; gap: 28px; }
.footer p { font-size: 12px; line-height: 1.6; margin: 0; color: var(--muted); }
.footer a { font-size: 13px; margin-left: auto; }
.mobile-only { display: none; }
@media (min-width: 1600px) { .page { max-width: 1440px; } }
@media (max-width: 1050px) {
  .hero { gap: 30px; }
  .diagram-pair { gap: 18px; }
  .diagram-node { padding: 14px 10px; gap: 8px; }
  .node-symbol { font-size: 23px; }
  .diagram-node strong { font-size: 14px; }
  .state-core { margin: 0 10px; padding: 24px 12px; }
  .state-core ul { font-size: 11px; }
  .architecture-layout { grid-template-columns: 2fr 1fr; gap: 24px; }
  .architecture-note, .control-note { padding-left: 22px; }
  .control-layout { grid-template-columns: 1.65fr 1fr; gap: 24px; }
  .modes { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 760px) {
  :root { --space: 24px; }
  .header { min-height: 102px; align-items: flex-start; flex-direction: column; justify-content: center; gap: 7px; }
  nav { gap: 22px; }
  nav a { font-size: 13px; padding: 4px 0; }
  .hero { grid-template-columns: 1fr; padding: 34px 0 25px; gap: 34px; }
  .hero-title { max-width: 580px; font-size: 35px; }
  .state-diagram { max-width: 540px; width: 100%; margin: 0 auto; }
  .diagram-node { min-height: 90px; padding: 16px; }
  .diagram-node strong { font-size: 16px; }
  .node-symbol { display: none; }
  .state-core { margin: 0 18px; }
  .state-core ul { font-size: 13px; }
  .problem-strip { grid-template-columns: 1fr; gap: 12px; padding-bottom: 30px; }
  .architecture-layout, .control-layout { grid-template-columns: 1fr; gap: 24px; }
  .architecture-note, .control-note { border-left: 0; border-top: 1px solid var(--line); padding: 24px 0 0; }
  .providers { grid-template-columns: 1fr 1fr; gap: 36px 12px; }
  .providers li { padding: 15px 12px; }
  .providers li:last-child { grid-column: 1 / -1; }
  .providers strong { font-size: 13px; }
  .providers small { font-size: 12px; }
  .section { padding: 30px 0; }
  .work-distinction { grid-template-columns: 1fr; gap: 12px; }
  .workflow-list > li { align-items: flex-start; gap: 18px; }
  .workflow-steps { display: grid; grid-template-columns: 1fr; gap: 5px; font-size: 17px; }
  .workflow-steps b { transform: rotate(90deg); width: 20px; height: 25px; }
  .modes { grid-template-columns: 1fr 1fr; }
  .modes dt { font-size: 13px; }
  .status-columns { grid-template-columns: 1fr; gap: 22px; }
  .status-columns > div + div { border-left: 0; border-top: 1px solid var(--line); padding: 22px 0 0; }
  .footer { flex-wrap: wrap; gap: 16px 24px; }
  .footer p { order: 3; width: 100%; }
}
@media (max-width: 380px) {
  :root { --space: 18px; }
  nav { gap: 16px; }
  .hero-title { font-size: 30px; }
  .button { padding: 15px 17px; gap: 15px; font-size: 14px; }
  .diagram-node { padding: 12px 8px; }
  .node-symbol { display: none; }
  .diagram-node strong { font-size: 14px; }
  .state-core ul { font-size: 11px; }
  .providers { grid-template-columns: 1fr 1fr; row-gap: 36px; }
  .providers li:last-child { grid-column: 1 / -1; }
  .providers strong, .providers small { font-size: 12px; }
  .modes { gap: 10px; }
  .modes dt { font-size: 12px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
@media print {
  .page { max-width: none; padding: 0; }
  .header nav, .button, .skip-link, .footer a { display: none; }
  body { font-size: 11pt; }
  .section { break-inside: avoid; }
  h2 { font-size: 23pt; }
  a { text-decoration: none; }
}