:root {
  color-scheme: light;
  --background: #fff;
  --foreground: #171717;
  --foreground-hover: #353535;
  --muted: #f6f6f5;
  --muted-foreground: #626262;
  --border: #dcdcd9;
  --accent: #e9e9e6;
  --ring: #242424;
  --radius: 0.75rem;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --page-gutter: clamp(1.25rem, 4vw, 4rem);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  --text-small: 0.8125rem;
  --text-body: 1rem;
  --text-lead: 1.125rem;
  --motion-duration: 160ms;
  --motion-ease: cubic-bezier(0.2, 0.8, 0.2, 1);
  font-family: var(--font);
  color: var(--foreground);
  background: var(--background);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-6);
  scrollbar-color: var(--border) var(--background);
}
* { box-sizing: border-box; }
body { margin: 0; }
h1, h2, h3, h4, p { margin: 0; }
a { color: inherit; text-underline-offset: 0.22em; }
button, input { font: inherit; }
button, a, input { -webkit-tap-highlight-color: transparent; }
button, input[type="radio"] { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: 0.5; }
button { color: inherit; }
button, a { touch-action: manipulation; }
a:focus-visible, button:focus-visible, [tabindex]:focus-visible, input:focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 4px;
}
::selection { color: var(--background); background: var(--foreground); }
[hidden] { display: none !important; }
.page-width { width: min(100%, 90rem); margin-inline: auto; padding-inline: var(--page-gutter); }
.section-width { width: min(calc(100% - var(--page-gutter) * 2), 78rem); margin-inline: auto; }
.site-header { display: flex; align-items: center; gap: var(--space-6); min-height: 6.5rem; }
.brand { display: flex; align-items: center; margin-left: -0.6rem; }
.brand img { width: 12.5rem; height: auto; display: block; }
.site-header nav { display: flex; gap: var(--space-6); margin-left: auto; align-items: center; }
.site-header nav a { text-decoration: none; font-size: 0.875rem; display: flex; align-items: center; min-height: 2.75rem; }
.site-header nav a:hover { text-decoration: underline; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: var(--space-3); min-height: 3.125rem; padding: var(--space-3) var(--space-5); border: 1px solid var(--foreground); border-radius: var(--radius); background: var(--foreground); color: var(--background); text-decoration: none; font-size: 0.9375rem; line-height: 1.4; font-weight: 600; transition: background var(--motion-duration) var(--motion-ease), color var(--motion-duration) var(--motion-ease); }
.button:hover { background: var(--foreground-hover); }
.button-small { min-height: 2.75rem; padding: 0.625rem var(--space-4); font-size: 0.875rem; }
.button-outline { color: var(--foreground); background: var(--background); border-color: var(--border); }
.button-outline:hover { background: var(--accent); }
svg { width: 1.125rem; height: 1.125rem; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; flex: none; }
.hero { display: grid; grid-template-columns: 0.94fr 1.06fr; align-items: start; gap: clamp(2.5rem, 5vw, 5.5rem); padding-top: var(--space-16); padding-bottom: var(--space-24); }
.hero-copy { padding-top: var(--space-4); }
.keep-together { white-space: nowrap; }
.hero-principle { max-width: 31rem; margin-top: var(--space-5); font-size: 1rem; line-height: 1.65; }
.primitive-map { min-width: 0; padding-top: var(--space-4); }
.primitive-map h2 { font-size: 1.5rem; line-height: 1.3; letter-spacing: -0.025em; font-weight: 600; }
.primitive-list { margin: var(--space-6) 0 0; }
.primitive-list > div { display: grid; grid-template-columns: minmax(9rem, .7fr) 1.3fr; gap: var(--space-6); padding-block: var(--space-5); border-top: 1px solid var(--border); }
.primitive-list dt { font-size: 1rem; font-weight: 600; line-height: 1.5; }
.primitive-list dd { margin: 0; color: var(--muted-foreground); font-size: .9375rem; line-height: 1.6; }
.primitive-connection { margin-top: var(--space-4); font-size: var(--text-small); line-height: 1.65; color: var(--muted-foreground); max-width: 39rem; }
.loop-section { padding-block: var(--space-16) var(--space-20); border-top: 1px solid var(--border); }
.loop-intro { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-16); align-items: start; margin-bottom: var(--space-10); }
.loop-intro > p { margin-top: 0; }
h1 { font-size: clamp(2.5rem, 4.2vw, 4.5rem); line-height: 1.06; letter-spacing: -0.04em; font-weight: 650; text-wrap: balance; }
.hero-description { max-width: 33rem; font-size: var(--text-lead); line-height: 1.65; color: var(--muted-foreground); margin-top: var(--space-8); }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-6); margin-top: var(--space-8); }
.text-link { font-size: 0.9375rem; font-weight: 500; min-height: 2.75rem; display: inline-flex; align-items: center; }
.pilot-note { margin-top: var(--space-5); max-width: 26rem; font-size: var(--text-small); line-height: 1.6; color: var(--muted-foreground); }
.loop { min-width: 0; border: 1px solid var(--border); border-radius: calc(var(--radius) + var(--space-1)); overflow: hidden; }
.loop-heading { padding: var(--space-6) var(--space-6) var(--space-5); }
.loop-heading h3 { font-size: 1.25rem; line-height: 1.35; letter-spacing: -0.02em; }
.loop-heading p { font-size: var(--text-small); line-height: 1.5; color: var(--muted-foreground); margin-top: var(--space-2); }
.loop-flow { padding: var(--space-5) var(--space-6) var(--space-3); border-block: 1px solid var(--border); background: var(--muted); }
.stage-tabs { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: var(--space-6); }
.stage-tab { position: relative; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: var(--space-2); min-height: 4.5rem; padding: var(--space-2) var(--space-1); border: 1px solid var(--border); border-radius: calc(var(--radius) - var(--space-1)); background: var(--background); color: var(--muted-foreground); font-size: 0.8125rem; line-height: 1.2; white-space: nowrap; transition: background var(--motion-duration) var(--motion-ease), color var(--motion-duration) var(--motion-ease); }
.stage-tab:not(:last-child)::after { content: ""; position: absolute; right: calc(var(--space-6) * -.65); top: calc(50% - 3px); width: 6px; height: 6px; border-top: 1px solid var(--muted-foreground); border-right: 1px solid var(--muted-foreground); transform: rotate(45deg); pointer-events: none; }
.loop-return { display: flex; align-items: center; justify-content: center; gap: var(--space-2); margin: 0 8%; padding: var(--space-3) var(--space-2); border-inline: 1px solid var(--border); border-bottom: 1px solid var(--border); border-radius: 0 0 var(--radius) var(--radius); color: var(--muted-foreground); font-size: var(--text-small); line-height: 1.5; }
.loop-policy { margin: var(--space-3) 0 var(--space-1); text-align: center; font-size: var(--text-small); line-height: 1.6; color: var(--muted-foreground); }
.stage-tab:hover { background: var(--accent); color: var(--foreground); }
.stage-tab[aria-selected="true"] { background: var(--foreground); color: var(--background); }
.stage-number { font-size: 1rem; font-variant-numeric: tabular-nums; }
.stage-tab:focus-visible { outline-offset: -3px; outline-color: var(--foreground); }
.stage-tab[aria-selected="true"]:focus-visible { outline-color: var(--background); }
.loop-panels { min-height: 20rem; }
.loop-panel { padding: var(--space-6); }
.loop-panel:focus-visible { outline-offset: -5px; }
.loop-panel h3 { max-width: 28rem; font-size: 1.5rem; line-height: 1.25; font-weight: 600; letter-spacing: -0.025em; text-wrap: balance; }
.loop-panel > p { margin-top: var(--space-3); max-width: 70ch; font-size: 0.9375rem; line-height: 1.6; color: var(--muted-foreground); }
.loop-panel.is-entering { animation: reveal-panel var(--motion-duration) var(--motion-ease); }
@keyframes reveal-panel { from { opacity: 0.6; } to { opacity: 1; } }
.evidence-list { display: grid; gap: var(--space-4); margin: var(--space-6) 0 0; }
.evidence-list div { display: grid; grid-template-columns: 10rem minmax(0, 1fr); gap: var(--space-4); }
.evidence-list dt { font-size: var(--text-small); font-weight: 600; line-height: 1.55; }
.evidence-list dd { margin: 0; font-size: var(--text-small); line-height: 1.55; color: var(--muted-foreground); }
.loop-footer { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: var(--space-4); padding: var(--space-4) var(--space-6); border-top: 1px solid var(--border); }
.loop-footer p { display: inline-flex; align-items: center; gap: var(--space-2); color: var(--muted-foreground); font-size: 0.75rem; line-height: 1.5; }
.loop-footer p svg { width: 1rem; height: 1rem; }
.rollout-choice { display: flex; flex-wrap: wrap; gap: var(--space-3); border: 0; padding: 0; margin: var(--space-5) 0; }
.rollout-choice legend { font-size: var(--text-small); font-weight: 600; margin-bottom: var(--space-3); }
.rollout-choice label { display: flex; align-items: center; gap: var(--space-2); min-height: 2.75rem; cursor: pointer; padding: 0 var(--space-4); border: 1px solid var(--border); border-radius: calc(var(--radius) - var(--space-1)); background: var(--background); font-size: 0.875rem; }
.rollout-choice label:has(input:checked) { border-color: var(--foreground); background: var(--muted); }
.rollout-choice input { width: 1rem; height: 1rem; margin: 0; accent-color: var(--foreground); }
.rollout-detail h4 { font-size: 0.9375rem; font-weight: 600; }
.rollout-detail p { margin-top: var(--space-2); color: var(--muted-foreground); font-size: 0.875rem; line-height: 1.6; }
.loop-panel .vision-note { font-size: 0.75rem; }
.business-section { border-top: 1px solid var(--border); padding-block: var(--space-20); display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-20); }
.section-intro h2, .control-section > h2, .pilot-section h2 { font-size: clamp(2rem, 3.2vw, 3rem); line-height: 1.15; letter-spacing: -0.035em; font-weight: 600; text-wrap: balance; }
.section-intro > p { margin-top: var(--space-6); color: var(--muted-foreground); line-height: 1.65; max-width: 30rem; }
.business-steps { display: grid; gap: var(--space-8); list-style: none; padding: 0; margin: 0; }
.business-steps li { display: grid; grid-template-columns: 2rem 1fr; gap: var(--space-4); }
.step-index { display: flex; align-items: center; justify-content: center; width: 2rem; height: 2rem; border: 1px solid var(--border); border-radius: 50%; color: var(--muted-foreground); font-size: 0.875rem; }
.business-steps h3 { font-size: 1.125rem; font-weight: 600; line-height: 1.5; }
.business-steps p { margin-top: var(--space-2); max-width: 31rem; color: var(--muted-foreground); line-height: 1.6; font-size: 0.9375rem; }
.control-section { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-20); padding-block: var(--space-20); border-top: 1px solid var(--border); }
.control-principles { display: grid; gap: var(--space-8); }
.control-principles h3 { font-size: 1.125rem; font-weight: 600; line-height: 1.5; }
.control-principles p { color: var(--muted-foreground); line-height: 1.65; margin-top: var(--space-2); max-width: 33rem; }
.pilot-section { border-block: 1px solid var(--border); padding-block: var(--space-16); display: grid; grid-template-columns: 1.3fr 0.7fr; align-items: center; gap: var(--space-16); }
.pilot-section p { max-width: 41rem; margin-top: var(--space-5); color: var(--muted-foreground); font-size: 0.9375rem; line-height: 1.65; }
.pilot-action { justify-self: end; }
.pilot-action p { font-size: var(--text-small); }
.site-footer { display: flex; justify-content: space-between; align-items: center; gap: var(--space-6); padding-block: var(--space-8); font-size: var(--text-small); color: var(--muted-foreground); }
.site-footer > p:first-child { color: var(--foreground); font-weight: 600; }
.site-footer a { display: flex; align-items: center; min-height: 2.75rem; }
.skip-link { position: absolute; top: var(--space-3); left: var(--space-3); transform: translateY(-200%); z-index: 2; padding: var(--space-3) var(--space-4); background: var(--foreground); color: var(--background); border-radius: var(--radius); }
.skip-link:focus { transform: translateY(0); }
.noscript-note { padding: var(--space-4) var(--space-6); color: var(--muted-foreground); line-height: 1.6; font-size: var(--text-small); }
.error-page { min-height: 100svh; display: flex; flex-direction: column; }
.error-main { width: min(100% - var(--page-gutter) * 2, 42rem); margin: auto; padding-block: var(--space-20); }
.error-main h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
.error-main p { color: var(--muted-foreground); margin-block: var(--space-6); line-height: 1.65; }
@media (max-width: 1100px) {
  .hero { grid-template-columns: 1fr 1fr; gap: var(--space-10); padding-top: var(--space-10); }
  .site-header { gap: var(--space-4); }
  .brand img { width: 10rem; }
  .site-header nav { gap: var(--space-4); }
  .evidence-list div { grid-template-columns: 1fr; gap: var(--space-1); }
  .loop-panels { min-height: 22rem; }
  .primitive-list > div { grid-template-columns: 1fr; gap: var(--space-2); }
  .business-section, .control-section { gap: var(--space-12); }
}
@media (max-width: 800px) {
  .site-header { flex-wrap: wrap; padding-top: var(--space-2); gap: 0 var(--space-4); }
  .site-header > .button { margin-left: auto; }
  .site-header nav { order: 3; width: 100%; justify-content: space-between; border-bottom: 1px solid var(--border); padding-bottom: var(--space-2); }
  .hero { grid-template-columns: 1fr; padding-top: var(--space-10); gap: var(--space-12); padding-bottom: var(--space-16); }
  .hero-copy { padding-top: 0; max-width: 38rem; }
  h1 { font-size: clamp(2.5rem, 7vw, 3.6rem); }
  .hero-description { margin-top: var(--space-6); }
  .hero-actions { margin-top: var(--space-6); }
  .loop-section { padding-block: var(--space-12); }
  .loop-intro { grid-template-columns: 1fr; gap: var(--space-5); margin-bottom: var(--space-8); }
  .primitive-list > div { grid-template-columns: minmax(8rem, .7fr) 1.3fr; gap: var(--space-4); }
  .loop-panels { min-height: 24rem; }
  .evidence-list div { grid-template-columns: 9rem 1fr; gap: var(--space-4); }
  .business-section, .control-section { grid-template-columns: 1fr; padding-block: var(--space-12); gap: var(--space-10); }
  .pilot-section { grid-template-columns: 1fr; gap: var(--space-8); padding-block: var(--space-12); }
  .pilot-action { justify-self: start; }
  .site-footer { flex-wrap: wrap; gap: var(--space-3) var(--space-6); }
  .site-footer > p:nth-child(2) { order: 3; width: 100%; }
}
@media (max-width: 440px) {
  .brand img { width: 9.5rem; }
  .site-header > .button { padding-inline: var(--space-3); gap: var(--space-2); font-size: 0.8125rem; }
  .site-header nav a { font-size: 0.8125rem; }
  .hero-description { font-size: 1.0625rem; }
  .loop-heading, .loop-panel { padding: var(--space-5); }
  .primitive-list > div { grid-template-columns: 1fr; gap: var(--space-2); }
  .loop-flow { padding: var(--space-3) var(--space-2); }
  .stage-tabs { gap: var(--space-2); }
  .stage-tab:not(:last-child)::after { right: -6px; width: 3px; height: 3px; }
  .loop-return { margin-inline: 6%; font-size: .75rem; }
  .stage-tab { font-size: 0.75rem; min-height: 4.25rem; }
  .loop-panels { min-height: 29rem; }
  .evidence-list div { grid-template-columns: 1fr; gap: var(--space-1); }
  .loop-footer { padding: var(--space-4) var(--space-5); }
  .loop-footer > .button { width: 100%; }
  .loop-footer > p { width: 100%; justify-content: center; }
  .hero-actions { gap: var(--space-4); }
  .site-footer { justify-content: space-between; }
}
@media (prefers-reduced-motion: reduce) {
  :root { scroll-behavior: auto; --motion-duration: 0ms; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}