* { box-sizing: border-box; }

html { background: var(--page); scroll-behavior: smooth; }

body {
  --route-accent: var(--case-field-accent);
  --route-soft: var(--case-field-soft);
  min-width: 20rem;
  margin: 0;
  overflow-x: clip;
  color: var(--ink);
  background:
    radial-gradient(circle at 78% 12%, color-mix(in srgb, var(--route-accent) 10%, transparent), transparent 24rem),
    var(--page);
  font-family: var(--font-display);
  font-size: var(--type-body);
  line-height: 1.5;
}

body[data-case="launch"] { --route-accent: var(--case-launch-accent); --route-soft: var(--case-launch-soft); }
body[data-case="adoption"] { --route-accent: var(--case-adoption-accent); --route-soft: var(--case-adoption-soft); }
body[data-case="technical"] { --route-accent: var(--case-technical-accent); --route-soft: var(--case-technical-soft); }

button, a { color: inherit; font: inherit; }
button { border: 0; }
a { text-underline-offset: 0.2em; text-decoration-thickness: 1px; }
a:hover { color: var(--route-accent); }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 4px; }

.skip-link {
  position: fixed;
  z-index: 40;
  top: var(--space-2);
  left: var(--space-2);
  padding: var(--space-2) var(--space-3);
  color: var(--surface);
  background: var(--ink);
  transform: translateY(-180%);
}
.skip-link:focus { transform: translateY(0); }

.case-nav, .case-main, .case-footer {
  width: auto;
  max-width: var(--content-max);
  margin: 0 auto;
  padding-right: var(--page-pad);
  padding-left: var(--page-pad);
}

.case-nav {
  position: relative;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-height);
  border-bottom: 1px solid var(--line);
}
.case-nav__home, .case-nav nav, .route-kicker, .route-label, .route-index, .case-footer, .case-action, .route-control span, .route-readout__index, .evidence-label {
  font-family: var(--font-mono);
  font-size: var(--type-tiny);
  font-weight: 500;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}
.case-nav__home { color: var(--route-accent); text-decoration: none; }
.case-nav nav { display: flex; gap: var(--space-4); color: var(--ink-soft); }
.case-nav nav a { text-decoration: none; }

.route-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(17rem, 0.75fr);
  align-items: end;
  gap: var(--space-6);
  min-height: min(43rem, calc(100svh - var(--header-height)));
  padding: var(--space-6) 0 var(--space-6);
  border-bottom: 1px solid var(--line);
}
.route-hero > * { min-width: 0; }
.route-kicker { margin: 0; color: var(--route-accent); }
.route-hero h1 {
  max-width: 12ch;
  margin: var(--space-3) 0 0;
  font-size: var(--type-route-hero);
  font-weight: 800;
  letter-spacing: -0.09em;
  line-height: 0.86;
  text-transform: uppercase;
}
.route-hero__intro { max-width: 42rem; margin: var(--space-4) 0 0; color: var(--ink-soft); font-size: clamp(1.15rem, 1.7vw, 1.55rem); letter-spacing: -0.025em; line-height: 1.3; }
.route-hero__facts { display: grid; border-top: 1px solid var(--line-strong); }
.route-fact { display: grid; grid-template-columns: 6rem minmax(0, 1fr); gap: var(--space-3); align-items: baseline; padding: var(--space-3) 0; border-bottom: 1px solid var(--line); }
.route-fact span { color: var(--route-accent); font-family: var(--font-mono); font-size: var(--type-tiny); letter-spacing: 0.08em; text-transform: uppercase; }
.route-fact strong { min-width: 0; overflow-wrap: anywhere; font-size: 1.05rem; line-height: 1.2; }

.route-section { padding: var(--space-7) 0; border-bottom: 1px solid var(--line); }
.route-section__header { display: grid; grid-template-columns: 12rem minmax(0, 1fr); grid-template-areas: "kicker heading" ". copy"; gap: var(--space-2) var(--space-5); margin-bottom: var(--space-5); }
.route-section__header .route-kicker { grid-area: kicker; }
.route-section__header h2 { grid-area: heading; max-width: 18ch; margin: 0; font-size: var(--type-route-heading); font-weight: 800; letter-spacing: -0.075em; line-height: 0.92; text-transform: uppercase; }
.route-section__header > p:last-child { grid-area: copy; max-width: 48rem; margin: 0; color: var(--ink-soft); font-size: clamp(1rem, 1.35vw, 1.25rem); }

.route-workspace { display: grid; grid-template-columns: 17rem minmax(0, 1fr); overflow: hidden; border: 1px solid var(--line); border-radius: var(--control-radius); background: var(--surface); }
.route-controls { display: flex; flex-direction: column; border-right: 1px solid var(--line); }
.route-control { display: grid; grid-template-columns: 2rem minmax(0, 1fr); gap: var(--space-2); align-items: center; min-height: var(--flagship-control-height); padding: var(--space-2) var(--space-3); border-bottom: 1px solid var(--line); color: var(--ink-soft); background: transparent; cursor: pointer; text-align: left; }
.route-control:last-child { border-bottom: 0; }
.route-control span { color: var(--route-accent); }
.route-control strong { font-size: 0.95rem; line-height: 1.15; }
.route-control:hover { color: var(--ink); background: color-mix(in srgb, var(--route-soft) 55%, transparent); }
.route-control[aria-selected="true"] { color: var(--surface); background: var(--route-accent); }
.route-control[aria-selected="true"] span { color: var(--surface); }

.route-readout { display: grid; align-content: center; min-height: 21rem; padding: var(--space-5); }
.route-readout__index { margin: 0; color: var(--route-accent); }
.route-readout h3 { max-width: 22ch; margin: var(--space-2) 0 0; font-size: clamp(2rem, 3.4vw, 3.4rem); letter-spacing: -0.07em; line-height: 0.95; }
.route-readout > p:not(.route-readout__index) { max-width: 50rem; margin: var(--space-3) 0 0; color: var(--ink-soft); }
.route-readout dl { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-3); margin: var(--space-4) 0 0; }
.route-readout dl > div { padding-top: var(--space-2); border-top: 1px solid var(--line); }
.route-readout dt { color: var(--route-accent); font-family: var(--font-mono); font-size: var(--type-tiny); letter-spacing: 0.08em; text-transform: uppercase; }
.route-readout dd { margin: var(--space-1) 0 0; }

.coverage-stage { display: grid; grid-template-columns: minmax(15rem, 0.9fr) minmax(0, 1.1fr); min-height: 24rem; }
.coverage-visual { position: relative; min-height: 24rem; overflow: hidden; border-right: 1px solid var(--line); background:
  linear-gradient(90deg, color-mix(in srgb, var(--line) 38%, transparent) 1px, transparent 1px),
  linear-gradient(0deg, color-mix(in srgb, var(--line) 38%, transparent) 1px, transparent 1px),
  color-mix(in srgb, var(--route-soft) 45%, var(--surface));
  background-size: var(--proof-grid-unit) var(--proof-grid-unit);
}
.coverage-hub, .coverage-node { position: absolute; display: grid; place-items: center; border: 1px solid var(--route-accent); border-radius: 50%; background: var(--surface); font-family: var(--font-mono); font-size: var(--type-tiny); transition: opacity var(--motion-standard), transform var(--motion-standard); }
.coverage-hub { top: 40%; left: 42%; width: 7rem; height: 7rem; color: var(--surface); background: var(--route-accent); text-align: center; }
.coverage-node { width: 3.1rem; height: 3.1rem; }
.coverage-node:nth-of-type(1) { top: 12%; left: 16%; }
.coverage-node:nth-of-type(2) { top: 9%; left: 60%; }
.coverage-node:nth-of-type(3) { top: 37%; left: 8%; }
.coverage-node:nth-of-type(4) { top: 30%; left: 78%; }
.coverage-node:nth-of-type(5) { top: 72%; left: 18%; }
.coverage-node:nth-of-type(6) { top: 76%; left: 58%; }
.coverage-node:nth-of-type(7) { top: 62%; left: 82%; }
.coverage-node.is-expanded { width: 2.5rem; height: 2.5rem; opacity: 0.1; }
.coverage-node.is-expanded:nth-of-type(8) { top: 5%; left: 84%; }
.coverage-node.is-expanded:nth-of-type(9) { top: 82%; left: 38%; }
.coverage-node.is-partner { width: 1.1rem; height: 1.1rem; border: 0; opacity: 0.08; background: var(--route-accent); }
.coverage-node.is-partner:nth-of-type(10) { top: 20%; left: 4%; }
.coverage-node.is-partner:nth-of-type(11) { top: 56%; left: 4%; }
.coverage-node.is-partner:nth-of-type(12) { top: 4%; left: 40%; }
.coverage-node.is-partner:nth-of-type(13) { top: 86%; left: 88%; }
.coverage-visual[data-scope="expanded"] .is-expanded, .coverage-visual[data-scope="ecosystem"] .is-expanded, .coverage-visual[data-scope="ecosystem"] .is-partner { opacity: 1; transform: scale(1.08); }

.evidence-line { display: grid; grid-template-columns: 10rem minmax(0, 1fr); gap: var(--space-4); padding: var(--space-3) 0; border-top: 1px solid var(--line); }
.evidence-line:last-child { border-bottom: 1px solid var(--line); }
.evidence-label { color: var(--route-accent); }
.evidence-line strong { max-width: 60rem; font-size: clamp(1.05rem, 1.45vw, 1.3rem); line-height: 1.25; }

.phase-timeline { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.phase { min-height: 16rem; padding: var(--space-4); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: color-mix(in srgb, var(--surface) 90%, transparent); }
.phase .route-index { color: var(--route-accent); }
.phase h3 { max-width: 18ch; margin: var(--space-4) 0 0; font-size: clamp(1.55rem, 2.4vw, 2.4rem); letter-spacing: -0.06em; line-height: 0.98; }
.phase p { max-width: 35rem; margin: var(--space-3) 0 0; color: var(--ink-soft); }

.signal-loop { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.signal-step { position: relative; min-height: 13rem; padding: var(--space-4); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--surface); }
.signal-step::after { position: absolute; top: 50%; right: -0.65rem; z-index: 2; color: var(--route-accent); content: ">"; font-family: var(--font-mono); }
.signal-step:last-child::after { display: none; }
.signal-step span { color: var(--route-accent); font-family: var(--font-mono); font-size: var(--type-tiny); }
.signal-step h3 { margin: var(--space-4) 0 0; font-size: 1.15rem; line-height: 1.05; }
.signal-step p { margin: var(--space-2) 0 0; color: var(--ink-soft); font-size: var(--type-small); }

.dual-loop { display: grid; gap: var(--space-5); }
.loop-group { display: grid; gap: var(--space-2); }
.loop-group > .route-label { margin: 0; color: var(--route-accent); }

.metric-ledger { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.metric-group { padding: var(--space-4); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--surface); }
.metric-group > .route-label { margin: 0 0 var(--space-3); color: var(--route-accent); }
.metric-group .evidence-line { grid-template-columns: 2rem minmax(0, 1fr); }

.handoff-map { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.handoff-step { position: relative; min-height: 15rem; padding: var(--space-4); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--surface); }
.handoff-step::after { position: absolute; top: 3rem; right: -0.65rem; z-index: 2; color: var(--route-accent); content: ">"; font-family: var(--font-mono); }
.handoff-step:last-child::after { display: none; }
.handoff-step span { color: var(--route-accent); font-family: var(--font-mono); font-size: var(--type-tiny); }
.handoff-step h3 { margin: var(--space-4) 0 0; font-size: 1.1rem; line-height: 1.05; }
.handoff-step p { margin: var(--space-2) 0 0; color: var(--ink-soft); font-size: var(--type-small); }

.evidence-source { display: grid; grid-template-columns: 8rem minmax(0, 1fr) auto; gap: var(--space-3); align-items: center; margin-top: var(--space-4); padding: var(--space-3) 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.evidence-source span { color: var(--route-accent); font-family: var(--font-mono); font-size: var(--type-tiny); letter-spacing: 0.08em; text-transform: uppercase; }
.evidence-source strong { font-size: 1rem; }
.evidence-source a { color: var(--route-accent); font-family: var(--font-mono); font-size: var(--type-tiny); letter-spacing: 0.08em; text-decoration: none; text-transform: uppercase; white-space: nowrap; }

.technical-ledger { border-top: 1px solid var(--line-strong); }
.technical-ledger__row { display: grid; grid-template-columns: 10rem minmax(0, 1fr); gap: var(--space-4); padding: var(--space-4) 0; border-bottom: 1px solid var(--line); }
.technical-ledger__row h3 { margin: 0; color: var(--route-accent); font-family: var(--font-mono); font-size: var(--type-tiny); font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase; }
.technical-ledger__row p { max-width: 60rem; margin: 0; color: var(--ink-soft); font-size: clamp(1rem, 1.25vw, 1.2rem); }

.source-registry { border-top: 1px solid var(--line-strong); }
.source-row { display: grid; grid-template-columns: 3rem minmax(13rem, 0.75fr) minmax(0, 1.25fr) auto; gap: var(--space-3); align-items: center; padding: var(--space-3) 0; border-bottom: 1px solid var(--line); }
.source-row > span { color: var(--route-accent); font-family: var(--font-mono); font-size: var(--type-tiny); }
.source-row h3 { margin: 0; font-size: 1.05rem; line-height: 1.15; }
.source-row p { margin: 0; color: var(--ink-soft); font-size: var(--type-small); }
.source-row a { color: var(--route-accent); font-family: var(--font-mono); font-size: var(--type-tiny); letter-spacing: 0.08em; text-decoration: none; text-transform: uppercase; white-space: nowrap; }

.system-architecture { display: grid; grid-template-columns: 15rem minmax(0, 1fr); overflow: hidden; border: 1px solid var(--line); border-radius: var(--control-radius); background: var(--surface); }
.architecture-core { display: grid; align-content: center; min-height: 24rem; padding: var(--space-4); color: var(--surface); background: var(--route-accent); }
.architecture-core span { font-family: var(--font-mono); font-size: var(--type-tiny); letter-spacing: 0.08em; text-transform: uppercase; }
.architecture-core strong { margin-top: var(--space-2); font-size: 1.7rem; letter-spacing: -0.05em; line-height: 0.95; }
.architecture-lanes { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.architecture-lane { position: relative; min-height: 12rem; padding: var(--space-4); border-bottom: 1px solid var(--line); border-left: 1px solid var(--line); background: color-mix(in srgb, var(--surface) 94%, var(--route-soft)); opacity: 0.55; transition: opacity var(--motion-standard), background var(--motion-standard); }
.architecture-lane:nth-last-child(-n + 2) { border-bottom: 0; }
.architecture-lane::before { position: absolute; top: 50%; left: 0; width: var(--space-4); border-top: 1px solid var(--route-accent); content: ""; transform: translateX(-100%); }
.architecture-lane span { color: var(--route-accent); font-family: var(--font-mono); font-size: var(--type-tiny); }
.architecture-lane h3 { margin: var(--space-3) 0 0; font-size: 1.2rem; line-height: 1.05; }
.architecture-lane p { margin: var(--space-2) 0 0; color: var(--ink-soft); font-size: var(--type-small); }
.system-architecture[data-active="agent-workspace"] [data-system-id="agent-workspace"],
.system-architecture[data-active="agent-architecture"] [data-system-id="agent-architecture"],
.system-architecture[data-active="evidence-control"] [data-system-id="evidence-control"],
.system-architecture[data-active="constraint-design"] [data-system-id="constraint-design"] { background: var(--route-soft); opacity: 1; }

.system-registry { border-top: 1px solid var(--line-strong); }
.system-registry__row { display: grid; grid-template-columns: 3rem minmax(12rem, 0.65fr) minmax(0, 1.35fr); gap: var(--space-3); align-items: baseline; padding: var(--space-3) 0; border-bottom: 1px solid var(--line); }
.system-registry__row > span { color: var(--route-accent); font-family: var(--font-mono); font-size: var(--type-tiny); }
.system-registry__row h3 { margin: 0; font-size: 1.05rem; }
.system-registry__row p { margin: 0; color: var(--ink-soft); }

.comparison { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); overflow: hidden; border: 1px solid var(--line); border-radius: var(--control-radius); }
.comparison article { min-height: 16rem; padding: var(--space-5); background: var(--surface); }
.comparison article + article { border-left: 1px solid var(--line); background: var(--route-soft); }
.comparison .route-label { margin: 0; color: var(--route-accent); }
.comparison h3 { max-width: 18ch; margin: var(--space-3) 0 0; font-size: clamp(1.75rem, 2.8vw, 2.8rem); letter-spacing: -0.065em; line-height: 0.95; }
.comparison p:last-child { max-width: 38rem; margin: var(--space-3) 0 0; color: var(--ink-soft); }

.case-closing { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: end; gap: var(--space-5); padding: var(--space-7) 0; border-bottom: 1px solid var(--line); }
.case-closing h2 { max-width: 19ch; margin: var(--space-2) 0 0; font-size: var(--type-route-heading); font-weight: 800; letter-spacing: -0.075em; line-height: 0.92; text-transform: uppercase; }
.case-action { display: inline-block; padding-bottom: var(--space-2); border-bottom: 1px solid var(--route-accent); color: var(--route-accent); text-decoration: none; white-space: nowrap; }
.case-footer { display: flex; justify-content: space-between; gap: var(--space-3); padding-top: var(--space-5); padding-bottom: var(--space-5); color: var(--ink-soft); }

@media (max-width: 54rem) {
  .case-nav { min-height: 4.75rem; }
  .case-nav nav { gap: var(--space-2); font-size: 0.6rem; }
  .route-hero { grid-template-columns: 1fr; min-height: auto; gap: var(--space-5); }
  .route-section__header { grid-template-columns: 1fr; grid-template-areas: "kicker" "heading" "copy"; gap: var(--space-3); }
  .route-workspace { grid-template-columns: 1fr; }
  .route-controls { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-right: 0; border-bottom: 1px solid var(--line); }
  .route-control { grid-template-columns: 1fr; min-height: 5rem; border-right: 1px solid var(--line); }
  .route-readout { min-height: auto; }
  .coverage-stage { grid-template-columns: 1fr; }
  .coverage-visual { border-right: 0; border-bottom: 1px solid var(--line); }
  .signal-loop { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .signal-step::after { display: none; }
  .handoff-map { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .handoff-step::after { display: none; }
  .source-row { grid-template-columns: 2rem minmax(0, 1fr) auto; }
  .source-row p { grid-column: 2 / -1; }
  .system-architecture { grid-template-columns: 1fr; }
  .architecture-core { min-height: 10rem; }
  .architecture-lane::before { display: none; }
  .case-closing { grid-template-columns: 1fr; }
  .case-action { justify-self: start; }
}

@media (max-width: 38rem) {
  .case-nav nav a:nth-child(n + 3) { display: none; }
  .route-hero h1 { font-size: clamp(2.75rem, 12.5vw, 3.6rem); }
  .route-hero__facts, .phase-timeline, .signal-loop, .comparison, .metric-ledger, .handoff-map { grid-template-columns: 1fr; }
  .route-controls { grid-template-columns: 1fr; }
  .route-control { min-height: 0; grid-template-columns: 2rem minmax(0, 1fr); }
  .route-readout { padding: var(--space-4); }
  .route-readout dl { grid-template-columns: 1fr; }
  .evidence-line { grid-template-columns: 1fr; gap: var(--space-1); }
  .comparison article + article { border-top: 1px solid var(--line); border-left: 0; }
  .evidence-source, .technical-ledger__row, .source-row { grid-template-columns: 1fr; gap: var(--space-1); }
  .source-row p { grid-column: auto; }
  .architecture-lanes, .system-registry__row { grid-template-columns: 1fr; }
  .architecture-lane { min-height: 0; border-left: 0; }
  .architecture-lane:nth-last-child(-n + 2) { border-bottom: 1px solid var(--line); }
  .architecture-lane:last-child { border-bottom: 0; }
  .case-footer { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 1ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; transition-duration: 1ms !important; }
}