:root {
  --surface-primary: #edf1ec;
  --surface-secondary: #102d30;
  --surface-tertiary: #e2e9e3;
  --ink-primary: #17262a;
  --ink-muted: #5d6a68;
  --signal-primary: #d9583f;
  --signal-secondary: #2f7d6b;
  --signal-boundary: #b0802f;
  --line-subtle: #b9c5be;
  --display: "Arial Narrow", "Avenir Next Condensed", "Helvetica Neue", sans-serif;
  --body: "Avenir Next", "Helvetica Neue", Arial, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--surface-primary); color: var(--ink-primary); font: 16px/1.55 var(--body); }
a { color: inherit; }
.skip { position: fixed; left: 1rem; top: .75rem; z-index: 99; padding: .65rem .9rem; background: var(--signal-primary); color: #fff; transform: translateY(-180%); }
.skip:focus { transform: translateY(0); }
.shell { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
.hero { display: grid; grid-template-columns: minmax(0, 1fr) minmax(340px, .78fr); gap: clamp(38px, 8vw, 110px); align-items: center; padding: clamp(60px, 10vw, 128px) 0 82px; }
.eyebrow, .ticket__top, .ticket__foot, .route em, .step-label, .simulator__bar, .simulator__status, .simulator__controls button, .evidence__top, .evidence-list em, .scope-row > span, .boundary-label { font-family: var(--mono); letter-spacing: .09em; text-transform: uppercase; }
.eyebrow { margin: 0 0 14px; color: var(--signal-secondary); font-size: .7rem; font-weight: 700; }
h1, h2, h3 { font-family: var(--display); letter-spacing: -.065em; line-height: .92; }
h1 { max-width: 760px; margin: 0 0 24px; font-size: clamp(3.65rem, 8.4vw, 8.4rem); font-weight: 900; }
h2 { margin: 0; font-size: clamp(2.8rem, 6.1vw, 6.2rem); font-weight: 900; }
h3 { margin: 0; font-size: 2rem; font-weight: 850; }
.hero__lede { max-width: 640px; margin: 0 0 28px; color: var(--ink-muted); font-size: clamp(1.1rem, 1.9vw, 1.35rem); }
.hero__actions, .close__actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; padding: 11px 15px; border: 1px solid var(--ink-primary); background: transparent; color: var(--ink-primary); cursor: pointer; font: .68rem var(--mono); letter-spacing: .06em; text-decoration: none; text-transform: uppercase; transition: transform .18s ease, background .18s ease, color .18s ease; }
.button:hover, .button:focus-visible { transform: translateY(-2px); }
.button--primary { border-color: var(--signal-primary); background: var(--signal-primary); color: #fff; }
.button--primary:hover, .button--primary:focus-visible { border-color: var(--ink-primary); background: var(--ink-primary); }
.button--quiet:hover, .button--quiet:focus-visible { background: var(--ink-primary); color: #fff; }
.button--light { border-color: #f2f5ee; color: #f2f5ee; }
.button--light:hover, .button--light:focus-visible { background: #f2f5ee; color: var(--surface-secondary); }
.hero__boundary { max-width: 630px; margin: 16px 0 0; color: var(--ink-muted); font-size: .84rem; }
.ticket { position: relative; padding: 20px; overflow: hidden; background: var(--surface-secondary); color: #f2f5ee; box-shadow: 18px 18px 0 var(--signal-secondary); }
.ticket::before { content: ""; position: absolute; inset: 12px; border: 1px solid rgba(242,245,238,.22); pointer-events: none; }
.ticket__top, .ticket__foot { display: flex; justify-content: space-between; gap: 12px; padding: 4px 6px 15px; color: #a7c2b8; font-size: .62rem; }
.ticket__title { padding: 25px 6px 24px; border-block: 1px solid rgba(242,245,238,.2); }
.ticket__title strong { display: block; color: #fff; font: 900 clamp(2.6rem, 5.2vw, 4.9rem)/.84 var(--display); letter-spacing: -.08em; }
.ticket__title span { display: block; margin-top: 11px; color: #b7cbc1; }
.route { position: relative; margin: 0; padding: 12px 6px 10px; list-style: none; }
.route::before { content: ""; position: absolute; left: 17px; top: 10px; bottom: 10px; width: 1px; background: rgba(242,245,238,.24); }
.route li { position: relative; display: grid; grid-template-columns: 24px 1fr auto; gap: 11px; align-items: center; min-height: 52px; border-bottom: 1px solid rgba(242,245,238,.14); }
.route li:last-child { border-bottom: 0; }
.route__number { position: relative; z-index: 1; display: grid; width: 22px; height: 22px; place-items: center; border: 1px solid #c4dbce; border-radius: 50%; background: var(--surface-secondary); color: #fff; font: .6rem var(--mono); }
.route b { display: block; font-size: .8rem; letter-spacing: .05em; }
.route small { display: block; color: #a7b9b2; font-size: .75rem; }
.route em { color: #9de1ae; font-size: .6rem; font-style: normal; }
.route em.route__hold { color: #f1c078; }
.ticket__foot { padding: 14px 6px 2px; border-top: 1px solid rgba(242,245,238,.2); }
.signal-strip { border-block: 1px solid var(--ink-primary); background: var(--ink-primary); color: #f2f5ee; }
.signal-strip__inner { display: grid; grid-template-columns: repeat(4, 1fr); }
.signal-strip span { padding: 15px 10px; border-right: 1px solid rgba(242,245,238,.24); font: .65rem var(--mono); text-align: center; text-transform: uppercase; }
.signal-strip span:last-child { border-right: 0; }
.signal-strip b { display: block; margin-bottom: 3px; color: #fff; font: 900 1.6rem/1 var(--display); letter-spacing: -.05em; }
.section { padding: clamp(68px, 10vw, 128px) 0; }
.section-head { display: grid; grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr); gap: 44px; align-items: end; margin-bottom: 44px; }
.section-head > p { max-width: 600px; margin: 0; color: var(--ink-muted); font-size: 1.06rem; }
.three-rail { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 2px solid var(--ink-primary); }
.three-rail article { min-height: 250px; padding: 18px 22px 20px 0; border-right: 1px solid var(--line-subtle); }
.three-rail article + article { padding-left: 22px; }
.three-rail article:last-child { border-right: 0; }
.three-rail article > span { color: var(--signal-primary); font: .66rem var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.three-rail h3 { margin: 52px 0 9px; }
.three-rail p { margin: 0; color: var(--ink-muted); }
.lab-section { padding: clamp(68px, 10vw, 128px) 0; background: var(--surface-secondary); color: #f2f5ee; }
.section-head--light > p { color: #b7cbc1; }
.section-head--light .eyebrow { color: #87c6ae; }
.lab-grid { display: grid; grid-template-columns: minmax(0, 1.04fr) minmax(320px, .96fr); gap: 24px; align-items: start; }
.simulator { border: 1px solid rgba(242,245,238,.45); background: #173b3d; }
.simulator__bar, .evidence__top { display: flex; justify-content: space-between; gap: 12px; padding: 14px 17px; color: #a7c2b8; font-size: .62rem; }
.progress { height: 4px; margin: 0 17px; background: rgba(242,245,238,.16); }
.progress span { display: block; width: 20%; height: 100%; background: var(--signal-primary); transition: width .2s ease; }
.simulator__body { min-height: 340px; padding: clamp(28px, 5vw, 52px) clamp(20px, 4vw, 44px); border-block: 1px solid rgba(242,245,238,.18); }
.step-label { margin: 0 0 13px; color: #87c6ae; font-size: .66rem; }
.simulator h3 { max-width: 580px; color: #fff; font-size: clamp(2.2rem, 4.7vw, 4.7rem); }
.simulator__body > p:not(.step-label):not(.simulator__status) { max-width: 560px; margin: 18px 0 22px; color: #c2d1c8; }
.step-actions { display: flex; flex-wrap: wrap; gap: 8px; min-height: 48px; align-items: center; }
.step-actions button { min-height: 44px; padding: 9px 13px; border: 1px solid #d6e5dc; background: transparent; color: #f2f5ee; cursor: pointer; font: .65rem var(--mono); letter-spacing: .05em; text-transform: uppercase; }
.step-actions button:hover, .step-actions button:focus-visible { background: #f2f5ee; color: var(--surface-secondary); }
.step-actions button.is-selected { border-color: var(--signal-primary); background: var(--signal-primary); }
.slot-note { color: #a7ddbd; font: .65rem var(--mono); letter-spacing: .05em; text-transform: uppercase; }
.simulator__status { min-height: 1.4em; margin: 22px 0 0; color: #b9d3c7; font-size: .66rem; }
.simulator__status[data-tone="hold"] { color: #f1c078; }
.simulator__status[data-tone="pass"] { color: #9de1ae; }
.simulator__controls { display: flex; flex-wrap: wrap; gap: 8px; padding: 14px 17px; }
.simulator__controls button { min-height: 38px; padding: 8px 10px; border: 1px solid rgba(242,245,238,.4); background: transparent; color: #d6e5dc; cursor: pointer; font-size: .6rem; }
.simulator__controls button:hover, .simulator__controls button:focus-visible, .simulator__controls button[aria-pressed="true"] { border-color: var(--signal-primary); background: var(--signal-primary); color: #fff; }
.evidence { padding: 0 20px 24px; border: 1px solid rgba(242,245,238,.45); background: #f5f6ef; color: var(--ink-primary); }
.evidence__top { margin: 0 -20px; border-bottom: 1px solid var(--line-subtle); color: var(--signal-secondary); }
.evidence__top span:last-child { color: var(--signal-primary); }
.evidence h3 { margin: 27px 0 8px; font-size: clamp(2.1rem, 4vw, 3.8rem); }
.evidence__intro { margin: 0 0 20px; color: var(--ink-muted); font-size: .88rem; }
.evidence-list { margin: 0 0 22px; padding: 0; border-top: 2px solid var(--ink-primary); list-style: none; }
.evidence-list li { display: flex; justify-content: space-between; gap: 14px; padding: 13px 0; border-bottom: 1px solid var(--line-subtle); font-size: .84rem; }
.evidence-list em { color: var(--ink-muted); font-size: .58rem; font-style: normal; white-space: nowrap; }
.evidence-list em[data-state="pass"] { color: var(--signal-secondary); }
.evidence-list em[data-state="hold"] { color: var(--signal-boundary); }
.evidence__status { min-height: 2.8em; margin: 14px 0 0; color: var(--ink-muted); font: .64rem/1.45 var(--mono); }
.scope-grid { border-top: 2px solid var(--ink-primary); }
.scope-row { display: grid; grid-template-columns: minmax(110px, .3fr) minmax(0, .78fr) minmax(0, 1.1fr); gap: 20px; align-items: baseline; padding: 17px 0; border-bottom: 1px solid var(--line-subtle); }
.scope-row > span { color: var(--signal-primary); font-size: .62rem; }
.scope-row strong { font: 800 1.35rem/1 var(--display); letter-spacing: -.03em; }
.scope-row p { margin: 0; color: var(--ink-muted); }
.boundary-band { padding: clamp(68px, 10vw, 128px) 0; background: var(--surface-tertiary); border-block: 1px solid var(--line-subtle); }
.boundary-band__inner { display: grid; grid-template-columns: minmax(0, .72fr) minmax(0, 1.28fr); gap: 50px; }
.boundary-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.boundary-columns > div { padding-top: 14px; border-top: 2px solid var(--signal-secondary); }
.boundary-columns > div:last-child { border-top-color: var(--signal-boundary); }
.boundary-label { font-size: .64rem; }
.boundary-label--yes { color: var(--signal-secondary); }
.boundary-label--no { color: var(--signal-boundary); }
.boundary-columns ul { margin: 15px 0 0; padding-left: 18px; color: var(--ink-muted); }
.boundary-columns li + li { margin-top: 9px; }
.close { padding-top: clamp(68px, 10vw, 128px); padding-bottom: 82px; }
.close__inner { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 30px; align-items: end; padding: clamp(28px, 5vw, 54px); background: var(--signal-primary); color: #fff; }
.close__inner .eyebrow { color: #ffe7dc; }
.close__inner h2 { max-width: 780px; }
.close__inner p:not(.eyebrow) { max-width: 650px; margin: 17px 0 0; color: rgba(255,255,255,.86); }
.close__actions { justify-content: flex-end; }
.close__actions .button { border-color: #fff; color: #fff; }
.close__actions .button--primary { background: var(--ink-primary); border-color: var(--ink-primary); }
.close__actions .button:hover, .close__actions .button:focus-visible { background: #fff; border-color: #fff; color: var(--ink-primary); }
.footer { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; padding: 23px 0 38px; border-top: 1px solid var(--line-subtle); color: var(--ink-muted); font-size: .84rem; }
.footer strong { color: var(--ink-primary); }
.footer p { margin: 5px 0 0; }
.footer nav { display: flex; flex-wrap: wrap; gap: 7px 17px; justify-content: flex-end; }
.footer a { color: var(--signal-secondary); }
:focus-visible { outline: 3px solid var(--signal-primary); outline-offset: 3px; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}
@media (max-width: 820px) {
  .hero, .section-head, .lab-grid, .boundary-band__inner, .close__inner { grid-template-columns: 1fr; }
  .hero { gap: 56px; }
  .three-rail { grid-template-columns: 1fr; }
  .three-rail article, .three-rail article + article { min-height: auto; padding: 20px 0; border-right: 0; border-bottom: 1px solid var(--line-subtle); }
  .three-rail article h3 { margin-top: 25px; }
  .three-rail article:last-child { border-bottom: 0; }
  .close__actions { justify-content: flex-start; }
}
@media (max-width: 600px) {
  .shell { width: min(100% - 28px, 1180px); }
  h1 { font-size: clamp(3.4rem, 17vw, 5.3rem); }
  .signal-strip__inner { grid-template-columns: repeat(2, 1fr); }
  .signal-strip span { border-bottom: 1px solid rgba(242,245,238,.24); }
  .signal-strip span:nth-child(even) { border-right: 0; }
  .signal-strip span:nth-child(n+3) { border-bottom: 0; }
  .ticket { box-shadow: 9px 9px 0 var(--signal-secondary); }
  .scope-row { grid-template-columns: 1fr; gap: 6px; }
  .boundary-columns { grid-template-columns: 1fr; }
  .evidence { padding-inline: 15px; }
  .evidence__top { margin-inline: -15px; }
  .simulator__body { min-height: 365px; padding-inline: 20px; }
}