:root {
  --bg: #fcfbff;
  --bg-tint: #f3f0fa;
  --paper: #ffffff;
  --ink: #1d1830;
  --ink-soft: #4a425f;
  --ink-quiet: #746c88;
  --rule: #e2dced;

  --night: #151029;
  --night-2: #1e1738;
  --night-rule: #352955;
  --night-ink: #f8f5ff;
  --night-soft: #d3cae5;
  --night-quiet: #aaa0c0;

  --violet: #7c3aed;
  --violet-deep: #5b21b6;
  --violet-light: #a78bfa;
  --blue: #4f8ff7;
  --mint: #41d9a3;
  --green: #1f9d68;
  --amber: #e9a72d;
  --rose: #dc557c;

  --serif: "Source Serif 4", Charter, Georgia, serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  --container: 1080px;
  --narrow: 760px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 72px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.68;
  font-feature-settings: "kern" 1, "liga" 1, "onum" 1;
  -webkit-font-smoothing: antialiased;
}

::selection { background: rgba(124, 58, 237, .2); }

a {
  color: var(--violet-deep);
  text-decoration-color: rgba(91, 33, 182, .3);
  text-underline-offset: .16em;
}

a:hover { color: var(--violet); text-decoration-color: currentColor; }

h1, h2, h3, h4, p { margin-top: 0; }

h1, h2, h3, h4 {
  color: var(--ink);
  font-family: var(--serif);
  letter-spacing: -.02em;
}

h2 {
  margin-bottom: 1.1rem;
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.08;
}

h3 { font-size: 1.35rem; line-height: 1.22; }
p { margin-bottom: 1.15em; }

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: 8px 14px;
  border-radius: 8px;
  background: var(--paper);
  font: 600 14px/1.3 var(--sans);
  transform: translateY(-160%);
}

.skip-link:focus { transform: translateY(0); }

.container {
  width: min(100% - 56px, var(--container));
  margin-inline: auto;
}

.container.narrow { max-width: var(--narrow); }

.container-copy {
  max-width: 780px;
  margin: 0 auto 48px;
  font-size: 1.05rem;
}

.band {
  padding: 96px 0;
  border-bottom: 1px solid var(--rule);
}

.band-tint { background: var(--bg-tint); }

.band-dark {
  color: var(--night-soft);
  background:
    radial-gradient(circle at 5% 2%, rgba(124, 58, 237, .26), transparent 35%),
    radial-gradient(circle at 95% 92%, rgba(65, 217, 163, .12), transparent 35%),
    var(--night);
  border-bottom-color: var(--night-rule);
}

.band-dark h2,
.band-dark h3,
.band-dark h4 { color: var(--night-ink); }
.band-dark .lede { color: var(--night-soft); }
.band-dark .kicker { color: var(--violet-light); }

.section-head {
  max-width: 840px;
  margin: 0 auto 52px;
}

.section-head .lede {
  margin-bottom: 0;
  color: var(--ink-soft);
  font-size: 1.2rem;
  line-height: 1.58;
}

.section-head .lede + .lede { margin-top: 1em; }
.section-head .case-setup { font-size: 1.05rem; }
.band-dark .section-head .lede { color: var(--night-soft); }

.kicker,
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  color: var(--violet-deep);
  font: 700 12px/1.4 var(--sans);
  letter-spacing: .13em;
  text-transform: uppercase;
}

.kicker::before,
.eyebrow::before {
  width: 24px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  content: "";
  opacity: .65;
}

/* Navigation */
.topnav {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(226, 220, 237, .9);
  background: rgba(252, 251, 255, .86);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
}

.reading-progress {
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 2px;
  overflow: hidden;
}

.reading-progress span {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--violet), var(--blue), var(--mint));
  transform: scaleX(0);
  transform-origin: left center;
  will-change: transform;
}

.topnav-inner {
  display: flex;
  max-width: var(--container);
  min-height: 58px;
  margin: 0 auto;
  padding: 0 28px;
  align-items: center;
  gap: 24px;
  font-family: var(--sans);
}

.topnav-brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.brand-mark {
  position: relative;
  width: 15px;
  height: 15px;
  border: 2px solid var(--violet);
  border-radius: 50%;
}

.brand-mark::after {
  position: absolute;
  width: 5px;
  height: 5px;
  top: 3px;
  left: 3px;
  border-radius: 50%;
  background: var(--violet);
  content: "";
}

.topnav-links {
  display: flex;
  margin: 0 auto;
  padding: 0;
  align-items: center;
  gap: 22px;
  list-style: none;
}

.topnav-links a,
.home-link {
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
}

.topnav-links a:hover,
.topnav-links a.is-active,
.home-link:hover { color: var(--violet); }
.home-link { white-space: nowrap; }

/* Hero */
.hero {
  position: relative;
  min-height: 730px;
  overflow: hidden;
  color: var(--night-ink);
  background:
    radial-gradient(circle at 8% 0%, rgba(124, 58, 237, .45), transparent 34%),
    radial-gradient(circle at 92% 22%, rgba(79, 143, 247, .18), transparent 30%),
    linear-gradient(145deg, #120d24 0%, #19102f 56%, #121528 100%);
}

.hero-grid {
  position: absolute;
  inset: 0;
  opacity: .25;
  background-image:
    linear-gradient(rgba(167, 139, 250, .12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(167, 139, 250, .12) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 28%, #000 100%);
  mask-image: linear-gradient(90deg, transparent, #000 28%, #000 100%);
}

.hero-inner {
  position: relative;
  display: grid;
  width: min(100% - 56px, 1120px);
  min-height: 730px;
  margin: 0 auto;
  padding: 92px 0 82px;
  grid-template-columns: minmax(0, 1.35fr) minmax(310px, .65fr);
  align-items: center;
  gap: 74px;
}

.hero .eyebrow { color: var(--violet-light); }

.hero h1 {
  max-width: 780px;
  margin-bottom: 28px;
  color: #fff;
  font-size: clamp(3rem, 6.3vw, 5.35rem);
  line-height: .98;
  letter-spacing: -.045em;
}

.hero h1 span {
  color: transparent;
  background: linear-gradient(100deg, #c6b4ff 5%, #8baeff 55%, #56ddb0 95%);
  -webkit-background-clip: text;
  background-clip: text;
}

.hero-sub {
  max-width: 720px;
  margin-bottom: 30px;
  color: var(--night-soft);
  font-size: 1.25rem;
  line-height: 1.56;
}

.hero-sub strong { color: #fff; }

.hero-thesis {
  max-width: 715px;
  margin: 0 0 30px;
  padding: 17px 21px 18px;
  border: 1px solid rgba(167, 139, 250, .3);
  border-left: 4px solid var(--mint);
  border-radius: 0 12px 12px 0;
  background: rgba(255, 255, 255, .05);
}

.thesis-label {
  margin-bottom: 5px;
  color: var(--mint);
  font: 700 10px/1.4 var(--sans);
  letter-spacing: .15em;
  text-transform: uppercase;
}

.hero-thesis p {
  margin: 0;
  color: #f4f0ff;
  font-size: 1.05rem;
  line-height: 1.55;
}

.hero-meta {
  display: flex;
  gap: 18px;
  color: var(--night-quiet);
  font: 500 13px/1.4 var(--sans);
}

.hero-meta span + span::before {
  margin-right: 18px;
  color: var(--violet-light);
  content: "·";
}

.hero-instrument {
  position: relative;
  padding: 26px;
  border: 1px solid rgba(167, 139, 250, .28);
  border-radius: 20px;
  background: linear-gradient(145deg, rgba(255, 255, 255, .09), rgba(255, 255, 255, .025));
  box-shadow: 0 36px 80px -28px rgba(0, 0, 0, .8);
  font-family: var(--sans);
}

.hero-instrument::before,
.hero-instrument::after {
  position: absolute;
  width: 9px;
  height: 9px;
  border: 1px solid rgba(255, 255, 255, .25);
  border-radius: 50%;
  content: "";
}

.hero-instrument::before { top: 11px; left: 11px; }
.hero-instrument::after { right: 11px; bottom: 11px; }

.instrument-top {
  display: flex;
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(255, 255, 255, .12);
  align-items: center;
  justify-content: space-between;
  color: var(--night-quiet);
  font: 600 11px/1.2 var(--mono);
  letter-spacing: .12em;
}

.instrument-live {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--mint);
}

.instrument-live i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 4px rgba(65, 217, 163, .12);
}

.instrument-readout { padding: 28px 0 20px; }

.readout-number {
  color: #fff;
  font: 500 clamp(4.5rem, 8vw, 6.7rem)/.85 var(--mono);
  letter-spacing: -.09em;
}

.readout-number span {
  margin-left: 4px;
  color: var(--violet-light);
  font-size: .35em;
  letter-spacing: -.03em;
}

.readout-copy {
  max-width: 245px;
  margin-top: 15px;
  color: var(--night-soft);
  font-size: 13px;
  line-height: 1.45;
}

.coin-line {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 8px;
  color: var(--night-quiet);
  font: 500 10px/1.2 var(--mono);
  letter-spacing: .04em;
}

.coin-track {
  position: relative;
  height: 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .1);
}

.coin-track i,
.coin-track b {
  position: absolute;
  top: 50%;
  width: 2px;
  height: 14px;
  background: var(--night-quiet);
  transform: translate(-50%, -50%);
}

.coin-track b {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--rose);
  box-shadow: 0 0 0 5px rgba(220, 85, 124, .14);
}

.instrument-equation {
  display: flex;
  margin: 27px 0 13px;
  padding: 13px 10px;
  border-block: 1px solid rgba(255, 255, 255, .1);
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--night-soft);
  font: 500 10.5px/1.3 var(--mono);
}

.instrument-equation strong { color: var(--violet-light); }
.instrument-equation .zero { color: var(--rose); text-decoration: line-through; }
.hero-instrument > p { margin: 0; color: var(--night-quiet); font-size: 12px; line-height: 1.55; }

/* Summary */
.band-summary {
  padding: 54px 0;
  background: linear-gradient(180deg, #f6f3fc, var(--bg));
}

.summary-card {
  position: relative;
  padding: 34px 42px 31px;
  overflow: hidden;
  border: 1px solid var(--rule);
  border-radius: 18px;
  background: var(--paper);
  box-shadow: 0 24px 50px -38px rgba(38, 22, 70, .55);
}

.summary-card::before {
  position: absolute;
  inset: 0 auto 0 0;
  width: 5px;
  background: linear-gradient(var(--violet), var(--blue), var(--mint));
  content: "";
}

.summary-label {
  margin-bottom: 14px;
  color: var(--violet-deep);
  font: 700 11px/1.4 var(--sans);
  letter-spacing: .14em;
  text-transform: uppercase;
}

.summary-card ul { margin: 0; padding-left: 1.25em; color: var(--ink-soft); }
.summary-card li { margin-bottom: .55em; padding-left: .25em; }
.summary-card li:last-child { margin-bottom: 0; }
.summary-card li::marker { color: var(--violet); }
.summary-card strong { color: var(--ink); }

/* Campaign case */
.stat-grid {
  display: grid;
  margin-bottom: 50px;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--rule);
  border-radius: 16px;
  overflow: hidden;
  background: var(--paper);
}

.stat-grid article {
  padding: 30px 24px 27px;
  border-right: 1px solid var(--rule);
  text-align: center;
}

.stat-grid article:last-child { border-right: 0; }

.stat-grid strong {
  display: block;
  margin-bottom: 7px;
  color: var(--violet-deep);
  font: 600 2.5rem/1 var(--mono);
  letter-spacing: -.06em;
}

.stat-grid span {
  color: var(--ink-quiet);
  font: 600 11px/1.4 var(--sans);
  letter-spacing: .07em;
  text-transform: uppercase;
}

.lifecycle {
  padding: 31px 32px 26px;
  border: 1px solid var(--rule);
  border-radius: 18px;
  background: linear-gradient(145deg, #fff, #f8f5fd);
}

.lifecycle-head {
  display: flex;
  margin-bottom: 24px;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  font-family: var(--sans);
}

.lifecycle-head span { font-weight: 700; }
.lifecycle-head small { color: var(--ink-quiet); font-size: 12px; }

.lifecycle-track {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  align-items: stretch;
  gap: 14px;
}

.lifecycle-track article {
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--rule);
  border-top-width: 4px;
  border-radius: 12px;
  background: #fff;
}

.lifecycle-track .life-win { border-top-color: var(--green); }
.lifecycle-track .life-tie { border-top-color: var(--amber); }
.lifecycle-track .life-loss { border-top-color: var(--rose); }

.life-step {
  margin-bottom: 13px;
  color: var(--ink-quiet);
  font: 600 10px/1.3 var(--mono);
  letter-spacing: .06em;
  text-transform: uppercase;
}

.lifecycle-track article > strong {
  display: block;
  margin-bottom: 12px;
  color: var(--ink);
  font: 600 2rem/1 var(--mono);
  letter-spacing: -.05em;
}

.life-win > strong { color: var(--green) !important; }
.life-loss > strong { color: var(--rose) !important; }
.lifecycle-track p { margin: 0; color: var(--ink-soft); font-size: 14px; line-height: 1.5; }
.life-arrow { display: grid; color: var(--violet-light); font: 500 24px/1 var(--sans); place-items: center; }

.lifecycle-note {
  margin: 23px 0 0;
  padding-top: 20px;
  border-top: 1px dashed var(--rule);
  color: var(--ink-soft);
  font-size: .95rem;
  text-align: center;
}

/* Dark result section */
.result-pair {
  display: grid;
  max-width: 860px;
  margin: 0 auto 46px;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

.result-pair article {
  padding: 28px 30px;
  border: 1px solid var(--night-rule);
  border-radius: 16px;
  background: rgba(255, 255, 255, .045);
}

.result-label {
  margin-bottom: 13px;
  color: var(--violet-light);
  font: 700 10px/1.3 var(--sans);
  letter-spacing: .13em;
  text-transform: uppercase;
}

.result-pair article > strong { display: block; color: var(--night-soft); font: 500 13px/1.4 var(--mono); }
.result-big { margin: 7px 0 13px; color: var(--mint); font: 600 3.5rem/1 var(--mono); letter-spacing: -.08em; }
.result-big.negative { color: var(--rose); }
.result-pair p { margin: 0; color: var(--night-quiet); font: 400 13px/1.5 var(--sans); }

.scale-ladder {
  max-width: 860px;
  margin: 0 auto 36px;
  padding: 28px 30px 24px;
  border: 1px solid var(--night-rule);
  border-radius: 16px;
  background: rgba(0, 0, 0, .12);
}

.scale-title { margin-bottom: 22px; color: var(--night-ink); font: 700 14px/1.4 var(--sans); }

.scale-row {
  display: grid;
  margin-bottom: 14px;
  grid-template-columns: 200px 1fr 65px;
  align-items: center;
  gap: 16px;
}

.scale-name { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; }
.scale-name b { color: var(--night-soft); font: 600 12px/1.3 var(--sans); }
.scale-name span { color: var(--night-quiet); font: 500 10px/1.3 var(--mono); }

.scale-meter {
  position: relative;
  height: 9px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(255, 255, 255, .08);
}

.scale-meter::before {
  position: absolute;
  z-index: 2;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
  background: rgba(255, 255, 255, .25);
  content: "";
}

.scale-meter i {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: var(--value);
  height: 100%;
  border-radius: inherit;
  background: var(--mint);
}

.scale-row.scale-bad .scale-meter i {
  left: calc(50% - var(--value));
  background: var(--rose);
}

.scale-row > strong { color: var(--mint); font: 600 12px/1 var(--mono); text-align: right; }
.scale-row.scale-bad > strong { color: var(--rose); }
.scale-axis { display: flex; margin: 8px 81px 0 216px; justify-content: space-between; color: var(--night-quiet); font: 500 10px/1.2 var(--mono); }

.dark-callout {
  max-width: 860px;
  margin: 0 auto;
  padding: 23px 26px;
  border-left: 4px solid var(--mint);
  border-radius: 0 12px 12px 0;
  background: rgba(65, 217, 163, .07);
}

.dark-callout span { display: block; margin-bottom: 7px; color: var(--mint); font: 700 10px/1.3 var(--sans); letter-spacing: .13em; text-transform: uppercase; }
.dark-callout p { margin: 0; color: var(--night-soft); }

/* Search race */
.search-race {
  max-width: 900px;
  margin: 0 auto 46px;
  padding: 28px 30px 24px;
  border: 1px solid var(--rule);
  border-radius: 18px;
  background: #fff;
}

.race-labels {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  color: var(--ink-quiet);
  font: 600 10px/1.3 var(--mono);
  text-transform: uppercase;
}

.search-race svg { display: block; width: 100%; height: auto; overflow: visible; }
.race-path { fill: none; stroke-width: 5; stroke-linecap: round; }
.path-a { stroke: var(--violet); }
.path-b { stroke: var(--blue); }
.path-c { stroke: var(--mint); }
.path-d { stroke: var(--rose); }
.finish-bracket { stroke: var(--ink-soft); stroke-width: 2; }
.svg-label { fill: var(--ink-quiet); font: 600 10px var(--mono); letter-spacing: 1.4px; }
.svg-result { fill: var(--ink); font: 600 12px var(--mono); }
.search-race > p { margin: -3px 0 0; color: var(--ink-soft); font-family: var(--sans); font-size: 14px; text-align: center; }

.noise-equation {
  display: grid;
  max-width: 760px;
  margin: 0 auto 82px;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
}

.noise-equation > div {
  padding: 22px 24px;
  border: 1px solid var(--rule);
  border-radius: 14px;
  background: var(--bg-tint);
}

.noise-equation span { display: block; margin-bottom: 8px; color: var(--ink-quiet); font: 600 10px/1.3 var(--sans); letter-spacing: .06em; text-transform: uppercase; }
.noise-equation strong { color: var(--ink); font: 600 2rem/1 var(--mono); letter-spacing: -.05em; }
.noise-equation .versus { color: var(--violet-light); font: 500 13px/1 var(--mono); }
.noise-equation p { grid-column: 1 / -1; margin: -8px auto 0; max-width: 660px; color: var(--ink-soft); font-size: .95rem; text-align: center; }

.belief-shifts {
  display: grid;
  max-width: 950px;
  margin: 0 auto;
  grid-template-columns: .8fr 1.2fr;
  gap: 54px;
  align-items: start;
}

.belief-intro { position: sticky; top: 100px; }
.belief-intro h3 { margin-bottom: 14px; font-size: 2rem; }
.belief-intro p { color: var(--ink-soft); }

.belief-list { border-top: 1px solid var(--rule); }
.belief-list article { display: grid; padding: 21px 0; border-bottom: 1px solid var(--rule); grid-template-columns: 45px 1fr; gap: 14px; }
.belief-list article > span { color: var(--violet-light); font: 600 11px/1.6 var(--mono); }
.belief-list strong { font: 700 15px/1.4 var(--sans); }
.belief-list p { margin: 4px 0 0; color: var(--ink-quiet); font-family: var(--sans); font-size: 13px; line-height: 1.5; }

/* Three gates and matrix */
.three-gates {
  display: grid;
  max-width: 950px;
  margin: 0 auto 28px;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.three-gates > article {
  padding: 27px 25px;
  border: 1px solid var(--rule);
  border-radius: 16px;
  background: #fff;
}

.gate-orbit {
  display: grid;
  width: 48px;
  height: 48px;
  margin-bottom: 20px;
  border: 1px solid rgba(124, 58, 237, .24);
  border-radius: 50%;
  background: rgba(124, 58, 237, .06);
  place-items: center;
}

.gate-orbit span { color: var(--violet-deep); font: 600 20px/1 var(--mono); }
.three-gates h3 { margin-bottom: 9px; }
.three-gates article p { margin: 0; color: var(--ink-soft); font-family: var(--sans); font-size: 13px; line-height: 1.55; }

.gate-product {
  display: flex;
  grid-column: 1 / -1;
  padding: 17px 20px;
  border-radius: 12px;
  align-items: center;
  justify-content: center;
  gap: 13px;
  background: var(--night);
  color: var(--night-soft);
  font: 500 12px/1.3 var(--mono);
}

.gate-product b { color: var(--violet-light); }
.gate-product strong { margin-left: 7px; color: var(--mint); }

.precision-note {
  max-width: 820px;
  margin: 0 auto 72px;
  padding: 20px 24px;
  border: 1px dashed rgba(124, 58, 237, .35);
  border-radius: 12px;
  background: rgba(255, 255, 255, .55);
}

.precision-note strong { display: block; margin-bottom: 4px; color: var(--violet-deep); font-family: var(--sans); font-size: 14px; }
.precision-note p { margin: 0; color: var(--ink-soft); font-size: .92rem; }

.matrix-wrap { max-width: 940px; margin: 0 auto; }
.matrix-title { margin-bottom: 26px; }
.matrix-title h3 { margin: 0; font-size: 1.8rem; }

.matrix {
  display: grid;
  grid-template-columns: 155px repeat(2, 1fr);
  grid-template-rows: auto repeat(2, 1fr);
  gap: 10px;
}

.matrix-col,
.matrix-row {
  display: flex;
  align-items: center;
  color: var(--ink-quiet);
  font: 700 11px/1.4 var(--sans);
  letter-spacing: .08em;
  text-transform: uppercase;
}

.matrix-col { justify-content: center; text-align: center; }
.matrix-row { padding-right: 18px; justify-content: flex-end; text-align: right; }

.cell {
  min-height: 190px;
  padding: 25px 26px;
  border: 1px solid var(--rule);
  border-radius: 15px;
}

.cell > span { display: inline-block; margin-bottom: 23px; padding: 4px 9px; border-radius: 999px; font: 700 9px/1.3 var(--sans); letter-spacing: .09em; text-transform: uppercase; }
.cell h4 { margin: 0 0 8px; font-size: 1.24rem; }
.cell p { margin: 0; color: var(--ink-soft); font-family: var(--sans); font-size: 13px; line-height: 1.5; }
.cell-green { background: rgba(31, 157, 104, .07); border-color: rgba(31, 157, 104, .25); }
.cell-green > span { color: #12764a; background: rgba(31, 157, 104, .12); }
.cell-yellow { background: rgba(233, 167, 45, .08); border-color: rgba(233, 167, 45, .28); }
.cell-yellow > span { color: #9a680a; background: rgba(233, 167, 45, .16); }
.cell-red { background: rgba(220, 85, 124, .07); border-color: rgba(220, 85, 124, .25); }
.cell-red > span { color: #a82f54; background: rgba(220, 85, 124, .12); }
.cell-gray { background: rgba(74, 66, 95, .05); }
.cell-gray > span { color: var(--ink-soft); background: rgba(74, 66, 95, .1); }

/* Seven gates */
.gate-list {
  display: grid;
  max-width: 950px;
  margin: 0 auto 64px;
  padding: 0;
  grid-template-columns: repeat(2, 1fr);
  gap: 0 44px;
  list-style: none;
  border-top: 1px solid var(--rule);
}

.gate-list li {
  display: grid;
  padding: 24px 0;
  border-bottom: 1px solid var(--rule);
  grid-template-columns: 46px 1fr;
  gap: 13px;
}

.gate-list li > span { color: var(--violet-light); font: 600 11px/1.7 var(--mono); }
.gate-list h3 { margin-bottom: 6px; font-size: 1.12rem; }
.gate-list p { margin: 0; color: var(--ink-soft); font-family: var(--sans); font-size: 13px; line-height: 1.55; }

.certify-flow {
  max-width: 950px;
  margin: 0 auto;
  padding: 29px 30px 25px;
  border: 1px solid var(--rule);
  border-radius: 17px;
  background: var(--bg-tint);
}

.certify-label { margin-bottom: 20px; color: var(--violet-deep); font: 700 11px/1.4 var(--sans); letter-spacing: .12em; text-transform: uppercase; }
.flow-row { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr; align-items: center; gap: 10px; }
.flow-row article { display: flex; min-height: 74px; padding: 14px; border: 1px solid var(--rule); border-radius: 11px; background: #fff; align-items: center; gap: 11px; }
.flow-row article span { display: grid; width: 27px; height: 27px; flex: 0 0 auto; border-radius: 50%; background: rgba(124, 58, 237, .1); color: var(--violet-deep); font: 700 10px/1 var(--mono); place-items: center; }
.flow-row article p { margin: 0; color: var(--ink-soft); font: 600 11px/1.4 var(--sans); }
.flow-row > b { color: var(--violet-light); font: 500 18px/1 var(--sans); }
.certify-flow > p { margin: 19px 0 0; color: var(--ink-soft); font-size: .9rem; text-align: center; }

/* Landscape browser */
.band-landscape { overflow: hidden; }

.tier-browser {
  max-width: 980px;
  margin: 0 auto 82px;
  border: 1px solid var(--night-rule);
  border-radius: 20px;
  overflow: hidden;
  background: rgba(0, 0, 0, .14);
}

.tier-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-bottom: 1px solid var(--night-rule);
}

.tier-tab {
  display: grid;
  position: relative;
  padding: 20px 22px;
  border: 0;
  border-right: 1px solid var(--night-rule);
  background: transparent;
  color: var(--night-quiet);
  grid-template-columns: 14px 1fr;
  grid-template-rows: auto auto;
  column-gap: 10px;
  text-align: left;
  cursor: pointer;
}

.tier-tab:last-child { border-right: 0; }
.tier-tab:hover { background: rgba(255, 255, 255, .035); }
.tier-tab:focus-visible { outline: 2px solid var(--violet-light); outline-offset: -3px; }
.tier-tab.is-active { background: rgba(255, 255, 255, .06); color: var(--night-ink); }
.tier-tab.is-active::after { position: absolute; right: 22px; bottom: -1px; left: 22px; height: 3px; border-radius: 3px 3px 0 0; background: var(--violet-light); content: ""; }
.tier-dot { width: 9px; height: 9px; margin-top: 5px; border-radius: 50%; grid-row: 1 / 3; }
.tier-dot.green { background: var(--mint); box-shadow: 0 0 0 4px rgba(65, 217, 163, .11); }
.tier-dot.yellow { background: var(--amber); box-shadow: 0 0 0 4px rgba(233, 167, 45, .11); }
.tier-dot.red { background: var(--rose); box-shadow: 0 0 0 4px rgba(220, 85, 124, .11); }
.tier-tab b { font: 700 14px/1.3 var(--sans); }
.tier-tab small { font: 500 11px/1.4 var(--sans); }

.tier-panels { padding: 34px; }
.js .tier-panel:not(.is-active),
.tier-panel[hidden] { display: none; }
.tier-summary { display: flex; margin-bottom: 24px; padding-bottom: 21px; border-bottom: 1px solid var(--night-rule); align-items: baseline; gap: 12px; }
.tier-summary strong { color: var(--night-ink); font-family: var(--sans); }
.tier-summary p { margin: 0; color: var(--night-quiet); font-family: var(--sans); font-size: 13px; }
.example-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.example-grid article { padding: 22px; border: 1px solid var(--night-rule); border-radius: 13px; background: rgba(255, 255, 255, .035); }
.example-grid article > span { display: block; margin-bottom: 9px; color: var(--violet-light); font: 700 10px/1.3 var(--sans); letter-spacing: .1em; text-transform: uppercase; }
.example-grid h3 { margin-bottom: 8px; font-size: 1.13rem; }
.example-grid p { margin: 0; color: var(--night-quiet); font: 400 13px/1.55 var(--sans); }

.claim-pairs { max-width: 920px; margin: 0 auto 66px; }
.claim-title { margin-bottom: 24px; }
.claim-title h3 { margin: 0; font-size: 1.8rem; }
.claim-table { display: grid; grid-template-columns: repeat(2, 1fr); overflow: hidden; border: 1px solid var(--night-rule); border-radius: 15px; }
.claim-table > div { padding: 17px 21px; border-bottom: 1px solid var(--night-rule); color: var(--night-quiet); font-family: var(--sans); font-size: 13px; line-height: 1.5; }
.claim-table > div:nth-child(odd) { border-right: 1px solid var(--night-rule); }
.claim-table > div:nth-last-child(-n + 2) { border-bottom: 0; }
.claim-table .claim-header { color: var(--violet-light); background: rgba(124, 58, 237, .1); font-size: 10px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.claim-table strong { color: var(--night-ink); }

.landscape-quote { max-width: 820px; margin: 0 auto; padding: 0; border: 0; text-align: center; }
.landscape-quote p { margin: 0; color: var(--night-ink); font-size: clamp(1.7rem, 3.5vw, 2.5rem); font-weight: 600; line-height: 1.25; letter-spacing: -.025em; }
.landscape-quote em { color: var(--mint); }

/* Inverted loop */
.loop-compare {
  display: grid;
  max-width: 980px;
  margin: 0 auto 72px;
  grid-template-columns: 1fr auto 1fr;
  align-items: stretch;
  gap: 17px;
}

.loop-compare > article { padding: 29px; border: 1px solid var(--rule); border-radius: 17px; }
.old-loop { background: #f8f6fa; }
.new-loop { background: linear-gradient(145deg, rgba(124, 58, 237, .08), rgba(65, 217, 163, .07)); border-color: rgba(124, 58, 237, .25) !important; }
.loop-label { margin-bottom: 7px; color: var(--ink-quiet); font: 700 9px/1.3 var(--sans); letter-spacing: .12em; text-transform: uppercase; }
.new-loop .loop-label { color: var(--violet-deep); }
.loop-compare h3 { margin-bottom: 20px; font-size: 1.6rem; }
.mini-loop { display: flex; min-height: 86px; margin-bottom: 22px; padding: 14px 12px; border-radius: 12px; background: #fff; align-items: center; justify-content: center; gap: 7px; }
.mini-loop span { color: var(--ink-soft); font: 600 10.5px/1.35 var(--mono); text-align: center; }
.mini-loop b { color: var(--violet-light); font: 500 15px/1 var(--sans); }
.loop-compare dl { margin: 0; }
.loop-compare dl div { display: grid; padding: 9px 0; border-top: 1px solid var(--rule); grid-template-columns: 92px 1fr; gap: 10px; }
.loop-compare dt { color: var(--ink-quiet); font: 600 10px/1.4 var(--sans); text-transform: uppercase; }
.loop-compare dd { margin: 0; color: var(--ink-soft); font: 500 12px/1.4 var(--sans); }
.loop-switch { display: grid; width: 42px; height: 42px; margin: auto; border-radius: 50%; background: var(--night); color: var(--mint); font: 500 20px/1 var(--sans); place-items: center; }

.active-learning {
  display: grid;
  max-width: 940px;
  margin: 0 auto;
  padding: 37px 40px;
  border-radius: 18px;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 50px;
  background: var(--night);
}

.active-learning h3 { color: var(--night-ink); font-size: 1.75rem; }
.active-learning p { margin: 0; color: var(--night-soft); }
.active-learning .kicker { color: var(--violet-light); }

.leverage-visual { display: grid; grid-template-columns: 1fr auto 1.2fr; align-items: center; gap: 16px; font-family: var(--sans); }
.anchor-stack { display: grid; position: relative; min-height: 165px; padding: 26px 20px; border: 1px solid var(--night-rule); border-radius: 14px; background: rgba(255, 255, 255, .04); place-items: center; }
.anchor-stack > span { position: absolute; width: 54px; height: 66px; border: 1px solid rgba(167, 139, 250, .28); border-radius: 7px; background: rgba(124, 58, 237, .08); transform: translate(calc(var(--n, 0) * 4px), calc(var(--n, 0) * -4px)); }
.anchor-stack > span:nth-child(1) { --n: -2; }
.anchor-stack > span:nth-child(2) { --n: -1; }
.anchor-stack > span:nth-child(3) { --n: 1; }
.anchor-stack > span:nth-child(4) { --n: 2; }
.anchor-stack strong, .anchor-stack small { position: relative; z-index: 2; }
.anchor-stack strong { align-self: end; color: #fff; font: 600 2.2rem/1 var(--mono); }
.anchor-stack small { align-self: start; margin-top: -7px; color: var(--night-quiet); font: 500 9px/1.3 var(--sans); text-align: center; text-transform: uppercase; }
.leverage-arrow { color: var(--mint); font-size: 20px; text-align: center; }
.leverage-arrow span { display: block; color: var(--night-quiet); font: 500 8px/1.3 var(--mono); text-transform: uppercase; }
.history-cloud { display: grid; position: relative; min-height: 165px; padding: 25px 16px; overflow: hidden; border: 1px solid var(--night-rule); border-radius: 14px; background: rgba(255, 255, 255, .04); place-items: center; }
.history-cloud i { position: absolute; width: 9px; height: 9px; border-radius: 50%; background: rgba(79, 143, 247, .48); }
.history-cloud i:nth-child(1) { left: 12%; top: 18%; }.history-cloud i:nth-child(2) { left: 27%; top: 10%; }.history-cloud i:nth-child(3) { left: 43%; top: 22%; }.history-cloud i:nth-child(4) { left: 62%; top: 12%; }.history-cloud i:nth-child(5) { left: 81%; top: 24%; }.history-cloud i:nth-child(6) { left: 14%; top: 49%; }.history-cloud i:nth-child(7) { left: 31%; top: 65%; }.history-cloud i:nth-child(8) { left: 78%; top: 58%; }.history-cloud i:nth-child(9) { left: 88%; top: 77%; }.history-cloud i:nth-child(10) { left: 51%; top: 82%; }.history-cloud i:nth-child(11) { left: 67%; top: 73%; }.history-cloud i:nth-child(12) { left: 22%; top: 84%; }
.history-cloud strong, .history-cloud small { position: relative; z-index: 2; }
.history-cloud strong { align-self: end; color: #fff; font: 600 2.2rem/1 var(--mono); }
.history-cloud small { align-self: start; margin-top: -5px; color: var(--night-quiet); font: 500 9px/1.3 var(--sans); text-align: center; text-transform: uppercase; }

/* Rules, limits, ending */
.rules {
  max-width: 880px;
  margin: 0 auto;
  padding: 0;
  list-style: none;
  counter-reset: rule;
}

.rules li { display: grid; padding: 27px 0; border-top: 1px solid var(--rule); grid-template-columns: 70px 1fr; gap: 20px; }
.rules li:last-child { border-bottom: 1px solid var(--rule); }
.rules li > span { display: grid; width: 47px; height: 47px; border: 1px solid rgba(124, 58, 237, .24); border-radius: 50%; color: var(--violet-deep); font: 600 13px/1 var(--mono); place-items: center; }
.rules h3 { margin-bottom: 7px; font-size: 1.3rem; }
.rules p { margin: 0; color: var(--ink-soft); }

.limits-list { border-top: 1px solid var(--rule); }
.limits-list article { display: grid; padding: 22px 0; border-bottom: 1px solid var(--rule); grid-template-columns: 155px 1fr; gap: 25px; }
.limits-list span { padding-top: 4px; color: var(--violet-deep); font: 700 10px/1.4 var(--sans); letter-spacing: .09em; text-transform: uppercase; }
.limits-list p { margin: 0; color: var(--ink-soft); }
.scope-closing { margin: 34px 0 0; padding: 23px 25px; border-left: 4px solid var(--violet); background: var(--bg-tint); }

.band-closing {
  position: relative;
  padding: 115px 0;
  overflow: hidden;
  color: var(--night-soft);
  background:
    radial-gradient(circle at 50% 0%, rgba(124, 58, 237, .35), transparent 45%),
    var(--night);
  text-align: center;
}

.band-closing::after {
  position: absolute;
  inset: 0;
  opacity: .16;
  background-image: radial-gradient(rgba(167, 139, 250, .45) 1px, transparent 1.5px);
  background-size: 30px 30px;
  content: "";
  -webkit-mask-image: radial-gradient(circle at center, #000, transparent 70%);
  mask-image: radial-gradient(circle at center, #000, transparent 70%);
  pointer-events: none;
}

.band-closing .container { position: relative; z-index: 2; }
.closing-mark { display: grid; width: 58px; height: 58px; margin: 0 auto 28px; border: 1px solid rgba(167, 139, 250, .35); border-radius: 50%; color: var(--mint); font: 500 25px/1 var(--mono); place-items: center; }
.band-closing h2 { color: #fff; }
.band-closing p { color: var(--night-soft); font-size: 1.1rem; }
.band-closing .closing-thesis { margin: 35px 0; color: var(--mint); font-size: clamp(1.6rem, 3.4vw, 2.35rem); font-weight: 600; line-height: 1.3; }
.closing-links { display: flex; margin-top: 35px; justify-content: center; gap: 12px; }

.button {
  display: inline-block;
  padding: 10px 18px;
  border: 1px solid var(--violet);
  border-radius: 999px;
  background: linear-gradient(135deg, var(--violet-deep), var(--violet));
  color: #fff;
  font: 600 13px/1.4 var(--sans);
  text-decoration: none;
  transition: transform .18s ease, box-shadow .18s ease;
}

.button:hover { color: #fff; transform: translateY(-2px); box-shadow: 0 15px 28px -18px rgba(124, 58, 237, .9); }
.button-ghost { border-color: var(--night-rule); background: rgba(255, 255, 255, .04); color: var(--night-soft); }

.references { padding: 68px 0; background: #f7f5fb; }
.references ol { margin: 15px 0 0; padding-left: 1.4em; color: var(--ink-soft); }
.references li { margin-bottom: .8em; padding-left: .3em; font-size: .86rem; }
.references li::marker { color: var(--violet); font-family: var(--mono); font-size: .8em; }

.site-footer {
  display: flex;
  min-height: 105px;
  padding: 28px max(28px, calc((100vw - var(--container)) / 2));
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  background: #0f0b1d;
  color: var(--night-quiet);
  font-family: var(--sans);
}

.site-footer div { display: flex; flex-direction: column; }
.site-footer strong { color: var(--night-soft); font-size: 13px; }
.site-footer span { font-size: 11px; }
.site-footer a { color: var(--violet-light); font-size: 12px; text-decoration: none; }

/* Reveal motion */
.js .reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .68s ease, transform .68s ease;
}

.js .reveal.is-visible { opacity: 1; transform: none; }

/* Deep-linked sections should never wait on a scroll event to become readable. */
.js section:target .reveal { opacity: 1; transform: none; }

/* Responsive */
@media (max-width: 960px) {
  .topnav-links { display: none; }
  .home-link { margin-left: auto; }
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero-instrument { max-width: 520px; }
  .hero { min-height: auto; }
  .hero-inner { min-height: auto; }
  .belief-shifts { grid-template-columns: 1fr; gap: 20px; }
  .belief-intro { position: static; }
  .active-learning { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  body { font-size: 17px; }
  .container { width: min(100% - 36px, var(--container)); }
  .band { padding: 72px 0; }
  .topnav-inner { padding-inline: 18px; }
  .hero-inner { width: min(100% - 36px, 1120px); padding: 72px 0 64px; }
  .hero h1 { font-size: clamp(2.75rem, 14vw, 4rem); }
  .hero-sub { font-size: 1.08rem; }
  .hero-meta { flex-direction: column; gap: 4px; }
  .hero-meta span + span::before { display: none; }
  .summary-card { padding: 29px 29px 27px; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-grid article:nth-child(2) { border-right: 0; }
  .stat-grid article:nth-child(-n + 2) { border-bottom: 1px solid var(--rule); }
  .lifecycle-track { grid-template-columns: 1fr; }
  .life-arrow { transform: rotate(90deg); }
  .result-pair { grid-template-columns: 1fr; }
  .scale-row { grid-template-columns: 1fr 57px; gap: 8px; }
  .scale-name { grid-column: 1 / -1; }
  .scale-axis { margin-left: 0; margin-right: 65px; }
  .race-labels { display: none; }
  .noise-equation { grid-template-columns: 1fr; gap: 12px; }
  .noise-equation .versus { text-align: center; }
  .noise-equation p { margin-top: 8px; }
  .three-gates { grid-template-columns: 1fr; }
  .gate-product { flex-wrap: wrap; }
  .matrix { grid-template-columns: 1fr; grid-template-rows: auto; }
  .matrix-corner, .matrix-col, .matrix-row { display: none; }
  .cell::before { display: block; margin-bottom: 8px; color: var(--ink-quiet); font: 700 9px/1.3 var(--sans); letter-spacing: .08em; text-transform: uppercase; }
  .cell-green::before { content: "Cheap + faithful"; }
  .cell-red::before { content: "Cheap + unvalidated"; }
  .cell-yellow::before { content: "Expensive + faithful"; }
  .cell-gray::before { content: "Expensive + unvalidated"; }
  .cell { min-height: 0; }
  .gate-list { grid-template-columns: 1fr; }
  .flow-row { grid-template-columns: 1fr; }
  .flow-row > b { transform: rotate(90deg); text-align: center; }
  .tier-tabs { grid-template-columns: 1fr; }
  .tier-tab { border-right: 0; border-bottom: 1px solid var(--night-rule); }
  .tier-tab:last-child { border-bottom: 0; }
  .tier-tab.is-active::after { top: 10px; right: auto; bottom: 10px; left: -1px; width: 3px; height: auto; border-radius: 0 3px 3px 0; }
  .tier-panels { padding: 24px; }
  .tier-summary { display: block; }
  .tier-summary strong { display: block; margin-bottom: 5px; }
  .example-grid { grid-template-columns: 1fr; }
  .claim-table { grid-template-columns: 1fr; }
  .claim-table .claim-header { display: none; }
  .claim-table > div { border-right: 0 !important; }
  .claim-table > div:nth-child(odd) { color: var(--night-ink); background: rgba(65, 217, 163, .055); font-weight: 600; }
  .claim-table > div:nth-child(even)::before { display: block; margin-bottom: 4px; color: var(--rose); content: "Does not certify"; font: 700 9px/1.3 var(--sans); letter-spacing: .08em; text-transform: uppercase; }
  .claim-table > div:nth-last-child(2) { border-bottom: 1px solid var(--night-rule); }
  .loop-compare { grid-template-columns: 1fr; }
  .loop-switch { transform: rotate(90deg); }
  .active-learning { padding: 30px 26px; gap: 34px; }
  .leverage-visual { gap: 9px; }
  .rules li { grid-template-columns: 53px 1fr; gap: 12px; }
  .limits-list article { grid-template-columns: 1fr; gap: 8px; }
  .closing-links { flex-direction: column; align-items: center; }
}

@media (max-width: 480px) {
  .home-link { display: none; }
  .topnav-brand { margin: 0 auto; }
  .hero-instrument { padding: 22px; }
  .instrument-equation { gap: 5px; font-size: 8.5px; }
  .coin-line { grid-template-columns: 1fr; }
  .coin-line > span { display: none; }
  .stat-grid strong { font-size: 2rem; }
  .lifecycle { padding: 25px 20px 22px; }
  .lifecycle-head { display: block; }
  .lifecycle-head small { display: block; margin-top: 4px; }
  .scale-ladder, .search-race { padding-inline: 18px; }
  .gate-product { font-size: 10px; }
  .certify-flow { padding-inline: 20px; }
  .mini-loop { flex-direction: column; }
  .mini-loop b { transform: rotate(90deg); }
  .leverage-visual { grid-template-columns: 1fr; }
  .leverage-arrow { transform: rotate(90deg); }
  .anchor-stack, .history-cloud { min-height: 135px; }
  .site-footer { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .js .reveal { opacity: 1; transform: none; }
}