:root {
  --paper: #f3f0e8;
  --paper-deep: #e7e1d5;
  --ink: #10231d;
  --ink-soft: #496057;
  --line: #c7c3b8;
  --acid: #c8f36b;
  --acid-deep: #91c52c;
  --coral: #f17452;
  --blue: #5c7cff;
  --cream: #fffdf7;
  --display: Georgia, "Times New Roman", "Noto Serif SC", serif;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background:
    radial-gradient(circle at 88% 4%, rgba(200, 243, 107, 0.26), transparent 24rem),
    var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration: none;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 100;
  padding: 10px 14px;
  border: 2px solid var(--cream);
  border-radius: 4px;
  background: var(--ink);
  color: var(--cream);
  font-weight: 750;
  transform: translateY(-180%);
}

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

:where(a, button, summary):focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 3px;
}

strong {
  font-weight: 720;
}

.section-shell {
  width: min(1180px, calc(100% - 48px));
  margin-inline: auto;
}

.math-appendix {
  padding: 112px 0 124px;
  background: var(--ink);
  color: var(--cream);
}

.appendix-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 310px;
  gap: 72px;
  align-items: end;
  margin: 28px 0 56px;
}

.appendix-heading h2 {
  max-width: 760px;
  margin-bottom: 20px;
  font: 500 clamp(42px, 5vw, 72px)/1.04 var(--display);
  letter-spacing: -0.045em;
}

.appendix-heading p {
  max-width: 720px;
  margin-bottom: 0;
  color: rgba(255, 253, 247, 0.7);
  font-size: 17px;
}

.appendix-map {
  padding: 22px 24px;
  border: 1px solid rgba(255, 253, 247, 0.22);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.035);
}

.appendix-map > span,
.derivation-label {
  color: var(--acid);
  font: 700 10px/1.2 var(--mono);
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.appendix-map ol {
  display: grid;
  gap: 8px;
  margin: 16px 0 0;
  padding-left: 22px;
  color: rgba(255, 253, 247, 0.72);
  font-size: 13px;
}

.appendix-map a:hover { color: var(--acid); }

.derivation-stack {
  display: grid;
  gap: 18px;
}

.derivation-card {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  scroll-margin-top: 92px;
  border: 1px solid rgba(255, 253, 247, 0.18);
  border-radius: 10px;
  background: #172c25;
  overflow: hidden;
}

.derivation-index {
  padding-top: 30px;
  border-right: 1px solid rgba(255, 253, 247, 0.16);
  color: var(--acid);
  text-align: center;
  font: 700 13px/1 var(--mono);
}

.derivation-body { padding: 30px 36px 36px; }

.derivation-body h3 {
  margin: 9px 0 12px;
  font: 500 clamp(25px, 3vw, 36px)/1.18 var(--display);
}

.derivation-body > p {
  max-width: 850px;
  color: rgba(255, 253, 247, 0.7);
}

.math-display {
  margin: 22px 0;
  padding: 22px 24px;
  overflow-x: auto;
  border-left: 3px solid var(--acid);
  background: #0e211b;
  color: #fff;
  font: 500 clamp(16px, 2vw, 24px)/1.5 var(--display);
  white-space: nowrap;
}

.math-display.multiline { display: grid; gap: 10px; }
.math-display.accent { color: var(--acid); font-size: clamp(20px, 2.4vw, 31px); }

.math-steps { display: grid; gap: 1px; background: rgba(255,255,255,.12); }
.math-steps div {
  display: grid;
  grid-template-columns: 110px minmax(0,1fr);
  gap: 18px;
  padding: 15px 18px;
  background: #172c25;
}
.math-steps span, .two-formulas span, .coupling-grid span {
  color: rgba(255,253,247,.48);
  font: 700 10px/1.4 var(--mono);
  text-transform: uppercase;
}
.math-steps b, .two-formulas b, .coupling-grid b { font: 500 16px/1.6 var(--display); }

.math-conclusion {
  display: flex;
  gap: 24px;
  align-items: baseline;
  margin-top: 22px;
  padding: 16px 18px;
  background: var(--acid);
  color: var(--ink);
}
.math-conclusion span { flex: 0 0 auto; font: 700 10px/1 var(--mono); text-transform: uppercase; }
.math-conclusion strong { font: 600 18px/1.45 var(--display); }

.two-formulas, .coupling-grid, .boundary-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 22px 0;
}
.two-formulas > div, .coupling-grid > div {
  display: grid;
  gap: 10px;
  padding: 20px;
  border: 1px solid rgba(255,253,247,.16);
}

.boundary-pair > div { padding: 20px; border-radius: 6px; }
.boundary-pair span { font: 700 11px/1 var(--mono); text-transform: uppercase; }
.boundary-pair p { margin: 8px 0 0; }
.boundary-yes { background: rgba(200,243,107,.12); border: 1px solid rgba(200,243,107,.45); }
.boundary-yes span { color: var(--acid); }
.boundary-no { background: rgba(241,116,82,.1); border: 1px solid rgba(241,116,82,.45); }
.boundary-no span { color: #ff9a7e; }

.assumption-strip { display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0; }
.assumption-strip span { padding: 7px 10px; border: 1px solid rgba(200,243,107,.45); color: var(--acid); font: 600 11px/1 var(--mono); }
.math-warning { padding: 14px 17px; border-left: 3px solid var(--coral); background: rgba(241,116,82,.08); }

.audit-table-wrap { margin-top: 22px; overflow-x: auto; }
.audit-table { width: 100%; min-width: 720px; border-collapse: collapse; }
.audit-table th, .audit-table td { padding: 14px 16px; border-bottom: 1px solid rgba(255,253,247,.14); text-align: left; }
.audit-table th { color: rgba(255,253,247,.45); font: 700 10px/1 var(--mono); text-transform: uppercase; }
.audit-table td { color: rgba(255,253,247,.76); font-size: 14px; }
.audit-pill { display: inline-flex; padding: 5px 8px; border-radius: 999px; font: 700 10px/1 var(--mono); }
.audit-pill.identified, .audit-pill.recovered { background: rgba(200,243,107,.14); color: var(--acid); }
.audit-pill.partial, .audit-pill.model { background: rgba(92,124,255,.16); color: #9eb1ff; }
.audit-pill.undefined { background: rgba(241,116,82,.16); color: #ff9a7e; }
.appendix-paper-link { display: inline-flex; margin-top: 24px; color: var(--acid); font-weight: 700; border-bottom: 1px solid currentColor; }

.standalone-math-body { background: #f7f5ef; color: #232924; }
.standalone-math-page { min-height: 100vh; }
.standalone-math-page .site-header { min-height: 62px; background: rgba(247,245,239,.96); color: #232924; border-color: #d9d6cc; }
.standalone-math-page .wordmark-mark { background: #263c34; color: #fff; }
.standalone-math-page .nav-paper { background: #263c34; }
.math-review-hero {
  display: grid;
  grid-template-columns: minmax(0,1fr) 310px;
  gap: 72px;
  align-items: end;
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  padding: 104px 0 62px;
  color: var(--cream);
}
.math-review-hero > div > span { color: var(--acid); font: 700 11px/1 var(--mono); letter-spacing: .09em; }
.math-review-hero h1 { max-width: 800px; margin: 22px 0 24px; font-size: clamp(58px,7vw,98px); }
.math-review-hero h1 em { color: var(--acid); }
.math-review-hero p { max-width: 720px; color: rgba(255,253,247,.7); font-size: 18px; }
.math-review-hero aside { display: grid; gap: 8px; padding: 22px; border: 1px solid rgba(255,253,247,.2); }
.math-review-hero aside b { margin-bottom: 8px; color: var(--acid); font: 700 10px/1 var(--mono); letter-spacing: .08em; }
.math-review-hero aside a { color: rgba(255,253,247,.72); font-size: 13px; }
.math-review-hero aside a:hover { color: var(--acid); }
.standalone-appendix { padding-top: 20px; }
.standalone-appendix > .section-shell > .section-kicker { display: none; }
.standalone-appendix .appendix-heading { display: none; }
.standalone-math-body .math-review-footer { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 10px; width: min(940px, calc(100% - 48px)); margin: 0 auto; padding: 32px 0 64px; border-top: 1px solid #d9d6cc; background: transparent; color: #365f50; }
.standalone-math-body .math-review-footer a { display: flex; align-items: center; min-height: 68px; padding: 14px 16px; border: 1px solid #d7ddd8; background: #fbfaf6; color: #365f50; font: 700 13px/1.45 var(--display); }
.standalone-math-body .math-review-footer a:hover { border-color: #8fa79b; background: #e8eee9; color: #173d2e; }

.e2e-math-hero { width: min(940px, calc(100% - 48px)); margin: 0 auto; padding: 86px 0 66px; border-bottom: 1px solid #d9d6cc; }
.e2e-math-hero > span { color: #607169; font: 700 10px/1 var(--mono); letter-spacing: .12em; }
.e2e-math-hero h1 { max-width: 900px; margin: 20px 0 22px; color: #1f2c27; font: 500 clamp(46px,5.4vw,68px)/1.05 var(--display); letter-spacing: -.045em; }
.e2e-math-hero p { max-width: 720px; margin-bottom: 0; color: #56635d; font-size: 18px; }
.hero-answer { display: grid; grid-template-columns: 100px 1fr; gap: 8px 22px; align-items: center; margin-top: 30px; padding: 22px 24px; border-left: 4px solid #315d4b; background: #e6eee8; }
.hero-answer > span { color: #557166; font: 700 10px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.hero-answer strong { min-width: 0; overflow-x: auto; color: #173d2e; font-size: 1.15em; }
.hero-answer strong mjx-container { margin: 0 !important; text-align: left !important; }
.hero-answer p { grid-column: 2; margin: 0; color: #56635d; font-size: 14px; }
.forward-lanes { display: grid; gap: 1px; margin-top: 34px; border: 1px solid #d4d9d4; background: #d4d9d4; }
.forward-lanes > div { display: flex; align-items: center; gap: 10px; padding: 15px 18px; overflow-x: auto; background: #fff; color: #32443c; white-space: nowrap; }
.forward-lanes b { flex: 0 0 130px; color: #6b7771; font: 700 10px/1 var(--mono); letter-spacing: .06em; }
.forward-lanes span, .forward-lanes strong { padding: 4px 7px; }.forward-lanes i { color: #9ba49f; font-style: normal; }.forward-lanes strong { background: #e7eee8; color: #173d2e; }
.object-ledger { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 1px; width: min(940px,calc(100% - 48px)); margin: 0 auto 72px; border: 1px solid #d9d6cc; background: #d9d6cc; }
.object-ledger > div { padding: 22px; background: #fbfaf6; }
.object-ledger span { display: block; margin-bottom: 14px; color: #738078; font: 700 10px/1 var(--mono); letter-spacing: .08em; }
.object-ledger b { color: #263c34; font-size: 16px; }.object-ledger p { margin: 12px 0 0; color: #68716c; font-size: 13px; }
.scope-note { display: grid; grid-template-columns: 120px 1fr; gap: 24px; width: min(940px,calc(100% - 48px)); margin: 28px auto; padding: 20px 22px; border: 1px solid #d8c8bb; background: #f5ece4; }
.scope-note b { color: #8a5639; font: 700 11px/1.5 var(--mono); letter-spacing: .06em; text-transform: uppercase; }
.scope-note p { margin: 0; color: #66584f; font-size: 14px; }
.e2e-derivation { display: grid; grid-template-columns: 150px minmax(0,740px); gap: 50px; width: min(940px,calc(100% - 48px)); margin: 0 auto; padding-top: 70px; }
.e2e-rail { position: sticky; top: 92px; align-self: start; display: grid; gap: 3px; padding: 14px 0; border-top: 1px solid #d9d6cc; border-bottom: 1px solid #d9d6cc; }
.e2e-rail a { padding: 8px 10px; color: #7a847f; font: 600 11px/1.3 var(--mono); }
.e2e-rail a:hover { background: #e7eee8; color: #234b3c; }
.e2e-content { min-width: 0; }
.e2e-step { padding: 0 0 78px; scroll-margin-top: 82px; }
.e2e-step + .e2e-step { padding-top: 68px; border-top: 1px solid #d9d6cc; }
.step-chip { display: inline-flex; color: #557166; font: 700 10px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.e2e-step h2 { margin: 14px 0 20px; color: #26332e; font: 500 clamp(31px,4vw,44px)/1.12 var(--display); letter-spacing: -.025em; }
.e2e-step > p { max-width: 700px; color: #5b655f; font-size: 16px; }
.latex-block { position: relative; margin: 22px 0; padding: 27px 58px 27px 24px; overflow-x: auto; border: 1px solid #d7ddd8; background: #fff; color: #17211d; }
.latex-block[data-equation]::after { content: "(" attr(data-equation) ")"; position: absolute; right: 18px; top: 50%; translate: 0 -50%; color: #909a94; font: 12px/1 var(--mono); }
.latex-block mjx-container { margin: .25em 0 !important; }
.latex-block.prominent { padding-block: 32px; border-color: #bfcac2; font-size: 1.1em; }
.formula-split { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 12px; margin: 22px 0; }
.formula-split > div { padding: 18px; border: 1px solid #d7ddd8; background: #fbfaf6; }
.formula-split > div > span { color: #77827c; font: 700 10px/1 var(--mono); text-transform: uppercase; }
.formula-split .latex-block { margin: 12px 0 0; padding: 12px 0; border: 0; background: transparent; }
.step-output { display: grid; grid-template-columns: 110px 1fr; gap: 18px; align-items: baseline; margin-top: 24px; padding: 17px 19px; border-left: 3px solid #527665; background: #e8eee9; color: #26352f; }
.step-output span { font: 700 10px/1 var(--mono); text-transform: uppercase; }.step-output b { font: 600 16px/1.5 var(--display); }
.step-note { margin-top: 22px; padding: 15px 18px; border-left: 3px solid #b87550; background: #f3eae2; color: #69564b; }
.loss-equation { border: 2px solid #7d9a8c; background: #fafffb; font-size: 1.1em; }
.derivative-block { font-size: .94em; }
.e2e-verdict { display: grid; gap: 12px; margin-top: 30px; padding: 24px; border: 1px solid #bfcac2; background: #e8eee9; }
.e2e-verdict span { color: #426353; font: 700 10px/1 var(--mono); letter-spacing: .1em; }.e2e-verdict strong { overflow-x: auto; color: #21372e; font-size: 17px; }
.delta-contrast { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 12px; margin-top: 26px; }
.delta-contrast > div { display: grid; gap: 10px; padding: 19px; border: 1px solid #d7ddd8; background: #fff; }
.delta-contrast > div:last-child { border-color: #ddc9bd; background: #f7eee8; }
.delta-contrast span { color: #66746d; font: 700 10px/1 var(--mono); text-transform: uppercase; }.delta-contrast b { color: #26352f; font: 600 15px/1.5 var(--display); }
.effect-ledger { display: grid; gap: 1px; margin-top: 22px; border: 1px solid #d7ddd8; background: #d7ddd8; }
.effect-ledger > div { display: grid; grid-template-columns: 1.05fr 1fr 1.65fr; gap: 16px; align-items: start; padding: 15px 17px; background: #fff; }
.effect-ledger-head { background: #e8eee9 !important; color: #557166; font: 700 10px/1.3 var(--mono); letter-spacing: .07em; text-transform: uppercase; }
.effect-ledger span, .effect-ledger strong { min-width: 0; color: #44524b; font-size: 13px; line-height: 1.55; }
.effect-ledger strong { color: #26352f; font-weight: 600; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 0 max(24px, calc((100vw - 1180px) / 2));
  border-bottom: 1px solid rgba(16, 35, 29, 0.16);
  background: rgba(243, 240, 232, 0.9);
  backdrop-filter: blur(16px);
}

.wordmark {
  display: flex;
  align-items: center;
  gap: 12px;
}

.wordmark-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 32px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--acid);
  font: 700 13px/1 var(--mono);
  letter-spacing: 0.08em;
  transform: rotate(-4deg);
}

.wordmark-copy {
  font: 600 14px/1.2 var(--sans);
  letter-spacing: -0.01em;
}

nav {
  display: flex;
  align-items: center;
  gap: 30px;
  font-size: 13px;
  font-weight: 650;
}

nav a:not(.nav-paper) {
  color: var(--ink-soft);
}

nav a:hover {
  color: var(--ink);
}

.nav-paper {
  padding: 10px 16px;
  border-radius: 999px;
  background: var(--ink);
  color: white;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(420px, 0.96fr);
  gap: 72px;
  align-items: center;
  min-height: 760px;
  padding-block: 90px 104px;
}

.eyebrow-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 28px;
}

.eyebrow,
.status-dot,
.card-label,
.section-kicker,
.formula-caption,
.loss-label,
.callout-label,
.step-index {
  font: 700 11px/1.2 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.eyebrow {
  display: inline-flex;
  padding: 7px 10px;
  border: 1px solid var(--ink);
  border-radius: 999px;
}

.status-dot {
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--ink-soft);
}

.status-dot i,
.code-status i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--acid-deep);
  box-shadow: 0 0 0 4px rgba(145, 197, 44, 0.16);
}

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

h1 {
  max-width: 730px;
  margin-bottom: 28px;
  font: 500 clamp(56px, 6.1vw, 91px)/0.98 var(--display);
  letter-spacing: -0.062em;
}

h1 em {
  display: block;
  color: var(--ink-soft);
  font-weight: 400;
}

.hero-lede {
  max-width: 690px;
  margin-bottom: 34px;
  color: var(--ink-soft);
  font-size: 18px;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: 52px;
  padding: 0 22px;
  border: 1px solid var(--ink);
  border-radius: 4px;
  font-size: 14px;
  font-weight: 700;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  background: var(--acid);
  box-shadow: 5px 5px 0 var(--ink);
}

.button-secondary {
  background: transparent;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin: 36px 0 0;
  padding: 0;
  list-style: none;
}

.tag-list li {
  padding: 5px 9px;
  border-radius: 2px;
  background: rgba(16, 35, 29, 0.07);
  color: var(--ink-soft);
  font: 600 11px/1.2 var(--mono);
}

.hero-model {
  position: relative;
  padding: 20px;
  border: 1px solid var(--ink);
  border-radius: 12px;
  background: var(--cream);
  box-shadow: 14px 14px 0 rgba(16, 35, 29, 0.11);
  transform: rotate(1deg);
}

.hero-model::before {
  content: "";
  position: absolute;
  inset: -14px auto auto -14px;
  width: 70px;
  height: 70px;
  border-top: 2px solid var(--coral);
  border-left: 2px solid var(--coral);
}

.model-topline,
.code-top {
  display: flex;
  justify-content: space-between;
  padding-bottom: 16px;
  border-bottom: 1px dashed var(--line);
  color: var(--ink-soft);
  font: 600 10px/1 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.model-observed {
  display: grid;
  grid-template-columns: 78px 26px 1fr;
  align-items: center;
  gap: 10px;
  padding: 34px 14px 28px;
}

.node {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 82px;
  padding: 12px;
  border: 1px solid var(--ink);
  background: white;
}

.node b {
  font: 600 23px/1.2 var(--display);
}

.node small,
.node span {
  color: var(--ink-soft);
  font: 500 10px/1.5 var(--mono);
}

.node-x {
  align-items: center;
  border-radius: 50%;
  background: var(--acid);
}

.node-abduction {
  gap: 3px;
  border-radius: 5px;
}

.flow-arrow {
  color: var(--coral);
  font: 400 26px/1 var(--display);
}

.branch-label {
  position: relative;
  text-align: center;
  color: var(--ink-soft);
  font: 600 9px/1 var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.branch-label::before,
.branch-label::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 23%;
  border-top: 1px solid var(--line);
}

.branch-label::before { left: 0; }
.branch-label::after { right: 0; }

.treatment-branches {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  padding-block: 22px;
}

.arm {
  overflow: hidden;
  border: 1px solid var(--ink);
  border-radius: 5px;
}

.arm-heading,
.arm-output {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
}

.arm-heading {
  border-bottom: 1px solid var(--ink);
  font: 700 12px/1 var(--mono);
}

.arm-heading small {
  opacity: 0.58;
  font-weight: 500;
}

.arm-zero .arm-heading { background: var(--paper-deep); }
.arm-one .arm-heading { background: var(--blue); color: white; }
.arm-output { background: white; }
.arm-output b { font: 500 20px/1 var(--display); }
.arm-output span { color: var(--ink-soft); font: 500 14px/1 var(--mono); }

.effect-output {
  padding: 18px;
  border-radius: 6px;
  background: var(--ink);
  color: white;
}

.effect-label {
  display: block;
  margin-bottom: 8px;
  color: var(--acid);
  font: 650 9px/1 var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.effect-formula {
  font: 500 25px/1.25 var(--display);
}

.metric-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-block: 1px solid var(--ink);
  background: var(--ink);
  color: white;
}

.metric-band > div {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 130px;
  border-right: 1px solid rgba(255, 255, 255, 0.18);
}

.metric-band > div:last-child { border-right: 0; }
.metric-number { color: var(--acid); font: 500 34px/1 var(--display); }
.metric-band div span:last-child { margin-top: 9px; color: rgba(255,255,255,.64); font: 600 10px/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; }

.idea-section,
.loss-section,
.reproduce-section {
  padding-block: 130px;
}

.section-kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 42px;
  color: var(--ink-soft);
}

.section-kicker span {
  display: grid;
  place-items: center;
  width: 30px;
  height: 22px;
  border: 1px solid currentColor;
  border-radius: 50%;
  color: var(--coral);
}

.section-kicker.light { color: rgba(255,255,255,.62); }
.section-kicker.light span { color: var(--acid); }

.section-heading-grid,
.experiment-heading {
  display: grid;
  grid-template-columns: 1.25fr .75fr;
  gap: 90px;
  align-items: end;
  margin-bottom: 66px;
}

.section-heading-grid h2,
.stable-copy h2,
.loss-intro h2,
.experiment-heading h2,
.reproduce-copy h2 {
  margin-bottom: 0;
  font: 500 clamp(39px, 4.4vw, 64px)/1.06 var(--display);
  letter-spacing: -0.045em;
}

.section-heading-grid p,
.experiment-heading p,
.reproduce-copy > p {
  margin-bottom: 0;
  color: var(--ink-soft);
  font-size: 16px;
  line-height: 1.8;
}

.shift-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.shift-card,
.estimand-card {
  padding: 32px;
  border: 1px solid var(--ink);
  border-radius: 6px;
}

.shift-card h3 {
  margin: 18px 0 26px;
  font: 500 27px/1.2 var(--display);
}

.shift-card > p,
.estimand-card > p {
  margin-bottom: 0;
  color: var(--ink-soft);
}

.shift-before { background: var(--paper-deep); }
.shift-after { background: var(--acid); }

.large-flow {
  display: flex;
  align-items: center;
  gap: 18px;
  min-height: 100px;
  margin-bottom: 24px;
  font: 500 45px/1 var(--display);
}

.large-flow span:not(.flow-arrow) {
  display: grid;
  place-items: center;
  min-width: 84px;
  height: 76px;
  padding: 0 20px;
  border: 1px solid var(--ink);
  border-radius: 50%;
  background: var(--cream);
}

.estimand-card {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 180px 1fr .7fr;
  gap: 36px;
  align-items: center;
  background: var(--cream);
}

.estimand-formula {
  display: flex;
  align-items: center;
  gap: 18px;
  font: 500 clamp(20px, 2.4vw, 34px)/1.25 var(--display);
}

.stable-section {
  padding-block: 130px;
  background: var(--ink);
  color: white;
}

.stable-grid {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 90px;
  align-items: center;
}

.stable-copy p {
  max-width: 520px;
  margin: 32px 0 40px;
  color: rgba(255,255,255,.66);
  font-size: 17px;
}

.property-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-block: 1px solid rgba(255,255,255,.2);
}

.property-list > div {
  padding: 20px 14px 18px 0;
}

.property-list span {
  color: var(--acid);
  font: 600 16px/1 var(--mono);
}

.property-list p {
  margin: 8px 0 0;
  font-size: 11px;
  line-height: 1.4;
}

.formula-board {
  padding: 26px;
  border: 1px solid rgba(255,255,255,.38);
  border-radius: 10px;
  background:
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px),
    #173029;
  background-size: 24px 24px;
  box-shadow: 12px 12px 0 rgba(200,243,107,.12);
}

.formula-caption { margin-bottom: 36px; color: var(--acid); }
.formula-line { text-align: center; font-family: var(--display); }
.small-formula { font-size: clamp(17px, 1.8vw, 23px); }
.mechanism-formula { font-size: clamp(18px, 2.1vw, 29px); }
.result-formula { color: var(--acid); font-size: clamp(21px, 2.5vw, 34px); }

.formula-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 28px 0;
  color: rgba(255,255,255,.42);
  font: 600 9px/1 var(--mono);
  text-transform: uppercase;
  letter-spacing: .08em;
}

.formula-divider::before,
.formula-divider::after { content: ""; flex: 1; border-top: 1px dashed rgba(255,255,255,.2); }

.scale-rule {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin-top: 28px;
  padding: 13px;
  border-radius: 4px;
  background: rgba(255,255,255,.08);
  font: 500 15px/1.2 var(--display);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 90px;
  border-top: 1px solid rgba(255,255,255,.2);
}

.steps-grid article {
  min-height: 240px;
  padding: 32px 32px 0 0;
  border-right: 1px solid rgba(255,255,255,.2);
}

.steps-grid article + article { padding-left: 32px; }
.steps-grid article:last-child { border-right: 0; }
.step-index { color: var(--acid); }
.steps-grid h3 { margin: 26px 0 12px; font: 500 24px/1.25 var(--display); }
.steps-grid p { color: rgba(255,255,255,.62); font-size: 14px; }

.loss-section {
  display: grid;
  grid-template-columns: .7fr 1.3fr;
  gap: 80px;
  align-items: center;
}

.loss-card {
  overflow: hidden;
  border: 1px solid var(--ink);
  border-radius: 8px;
  background: var(--cream);
  box-shadow: 10px 10px 0 var(--coral);
}

.loss-label {
  display: block;
  padding: 16px 22px;
  border-bottom: 1px solid var(--ink);
  background: var(--ink);
  color: var(--acid);
}

.loss-formula {
  padding: 44px 34px;
  overflow-wrap: anywhere;
  font: 500 clamp(18px, 2vw, 27px)/1.65 var(--display);
}

.loss-foot {
  display: flex;
  justify-content: space-between;
  padding: 16px 22px;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font: 500 10px/1.3 var(--mono);
}

.experiment-section {
  padding-block: 130px;
  background: var(--cream);
  border-block: 1px solid var(--ink);
}

.truth-layer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-bottom: 76px;
}

.truth-layer-grid article {
  min-height: 210px;
  padding: 28px;
  border: 1px solid var(--ink);
  border-radius: 6px;
  background: white;
}

.truth-layer-grid article:nth-child(2) { background: rgba(92,124,255,.08); }
.truth-layer-grid article:nth-child(3) { background: rgba(200,243,107,.22); }
.truth-layer-grid h3 { margin: 22px 0 13px; font: 500 25px/1.2 var(--display); }
.truth-layer-grid p { margin: 0; color: var(--ink-soft); font-size: 13px; }

.subsection-heading {
  display: grid;
  grid-template-columns: 1fr .75fr;
  gap: 80px;
  align-items: end;
  margin: 0 0 28px;
  padding-top: 8px;
}

.subsection-heading h3 {
  max-width: 720px;
  margin: 16px 0 0;
  font: 500 clamp(29px, 3vw, 43px)/1.08 var(--display);
  letter-spacing: -.035em;
}

.subsection-heading > p { margin: 0; color: var(--ink-soft); font-size: 14px; }
.waws-heading { margin-top: 96px; padding-top: 42px; border-top: 1px solid var(--line); }

.results-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 18px;
}

.result-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--ink);
  border-radius: 6px;
  background: white;
}

table {
  width: 100%;
  min-width: 690px;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}

th,
td {
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  white-space: nowrap;
}

th {
  background: var(--ink);
  color: rgba(255,255,255,.72);
  font: 650 10px/1 var(--mono);
  letter-spacing: .06em;
  text-transform: uppercase;
}

td { font-size: 13px; }
td:first-child { font-weight: 720; }
.row-emphasis { background: rgba(200,243,107,.26); }
.row-emphasis td { border-bottom-color: var(--ink); }

.you-are-here {
  margin-left: 9px;
  padding: 3px 5px;
  border-radius: 2px;
  background: var(--coral);
  color: white;
  font: 650 8px/1 var(--mono);
  text-transform: uppercase;
}

.family-pill {
  display: inline-block;
  padding: 4px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font: 600 9px/1 var(--mono);
}

.family-pill.cauchy { border-color: var(--acid-deep); background: rgba(200,243,107,.26); }
.family-pill.gaussian { border-color: #9da8dd; background: rgba(92,124,255,.1); }

.table-note {
  margin: 0;
  padding: 14px 20px;
  color: var(--ink-soft);
  font: 500 9px/1 var(--mono);
}

.result-callout {
  padding: 26px;
  border: 1px solid var(--ink);
  border-radius: 6px;
  background: var(--acid);
}

.ratio { margin: 20px 0 8px; font: 500 68px/1 var(--display); letter-spacing: -.06em; }
.result-callout p { color: #304329; font-size: 13px; }

.mini-bars { margin-top: 32px; }
.mini-bars > div {
  display: grid;
  grid-template-columns: 60px 1fr 52px;
  gap: 8px;
  align-items: center;
  margin-top: 12px;
  font: 600 9px/1 var(--mono);
}

.mini-bars i { display: block; height: 8px; background: var(--ink); }
.mini-bars b { font-weight: 600; text-align: right; }

.claims-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-top: 18px;
}

.evidence-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-top: 18px;
}

.claims-grid article,
.evidence-grid article {
  padding: 30px;
  border: 1px solid var(--ink);
  border-radius: 6px;
}

.claims-grid article > span,
.evidence-grid article > span { font: 700 10px/1 var(--mono); text-transform: uppercase; letter-spacing: .07em; }
.claims-grid h3,
.evidence-grid h3 { margin: 18px 0 16px; font: 500 25px/1.2 var(--display); }
.claims-grid ul { margin: 0; padding-left: 20px; color: var(--ink-soft); font-size: 13px; }
.claims-grid li + li { margin-top: 8px; }
.evidence-grid p { margin: 0; color: var(--ink-soft); font-size: 13px; }
.claim-positive { background: rgba(200,243,107,.2); }
.claim-positive > span { color: #5f870d; }
.claim-boundary { background: #f4e5df; }
.claim-boundary > span { color: #b3482b; }
.boundary-callout { background: #f4e5df; }

.reproduce-section {
  display: grid;
  grid-template-columns: .88fr 1.12fr;
  gap: 90px;
  align-items: center;
}

.reproduce-copy > p { margin: 30px 0 24px; }
.text-link { border-bottom: 1px solid var(--ink); font-size: 14px; font-weight: 700; }

.code-card {
  overflow: hidden;
  border: 1px solid var(--ink);
  border-radius: 8px;
  background: #14251f;
  color: #edf8e9;
  box-shadow: 12px 12px 0 rgba(16,35,29,.12);
}

.code-top { padding: 17px 20px; border-bottom-color: rgba(255,255,255,.18); color: rgba(255,255,255,.5); }
pre { margin: 0; padding: 32px; overflow-x: auto; }
code { color: #d9f5a6; font: 500 13px/1.85 var(--mono); }
.code-status { display: flex; align-items: center; gap: 10px; padding: 15px 20px; border-top: 1px solid rgba(255,255,255,.15); color: rgba(255,255,255,.56); font: 500 9px/1 var(--mono); text-transform: uppercase; letter-spacing: .07em; }

footer {
  padding: 80px max(24px, calc((100vw - 1180px) / 2)) 24px;
  background: var(--ink);
  color: white;
}

.footer-main {
  display: flex;
  justify-content: space-between;
  gap: 60px;
  padding-bottom: 70px;
}

.footer-mark { color: var(--acid); font: 700 11px/1 var(--mono); letter-spacing: .1em; }
.footer-main h2 { margin: 14px 0 10px; font: 500 42px/1 var(--display); }
.footer-main p { color: rgba(255,255,255,.5); font: 500 11px/1.5 var(--mono); }
.footer-links { display: flex; flex-direction: column; gap: 14px; align-items: flex-end; font-size: 13px; font-weight: 700; }
.footer-links a { border-bottom: 1px solid rgba(255,255,255,.24); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  padding-top: 22px;
  border-top: 1px solid rgba(255,255,255,.17);
  color: rgba(255,255,255,.42);
  font: 500 9px/1.4 var(--mono);
  text-transform: uppercase;
  letter-spacing: .06em;
}

@media (max-width: 980px) {
  .e2e-derivation { grid-template-columns: 1fr; gap: 24px; }
  .e2e-rail { position: static; grid-template-columns: repeat(5,minmax(0,1fr)); }
  .math-review-hero { grid-template-columns: 1fr; gap: 28px; }
  .appendix-heading { grid-template-columns: 1fr; gap: 28px; }
  .appendix-map { max-width: 520px; }
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .hero-model { max-width: 660px; }
  .section-heading-grid,
  .experiment-heading,
  .subsection-heading,
  .stable-grid,
  .loss-section,
  .reproduce-section { grid-template-columns: 1fr; gap: 46px; }
  .section-heading-grid,
  .experiment-heading { align-items: start; }
  .results-layout { grid-template-columns: 1fr; }
  .result-callout { display: grid; grid-template-columns: 100px 1fr 1fr; gap: 20px; align-items: center; }
  .ratio { margin: 0; }
  .mini-bars { margin: 0; }
  .estimand-card { grid-template-columns: 130px 1fr; }
  .estimand-card p { grid-column: 1 / -1; }
  .truth-layer-grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .e2e-math-hero { width: min(100% - 32px,960px); padding: 76px 0 58px; }
  .e2e-math-hero h1 { font-size: clamp(42px, 13vw, 58px); }
  .forward-map { flex-wrap: wrap; justify-content: center; padding-inline: 10px; white-space: normal; }
  .e2e-derivation { width: min(100% - 32px,1060px); }
  .e2e-rail { grid-template-columns: 1fr 1fr; }
  .formula-split { grid-template-columns: 1fr; }
  .object-ledger, .delta-contrast { grid-template-columns: 1fr; }
  .scope-note, .hero-answer { grid-template-columns: 1fr; gap: 9px; }
  .hero-answer p { grid-column: 1; }
  .effect-ledger > div { grid-template-columns: 1fr; gap: 5px; }
  .effect-ledger-head { display: none !important; }
  .step-output { grid-template-columns: 1fr; gap: 7px; }
  .latex-block { padding: 18px 30px 18px 10px; font-size: .78em; scrollbar-width: thin; }
  .latex-block[data-equation]::after { right: 8px; font-size: 9px; }
  .latex-block.prominent { font-size: .8em; }
  .formula-split .latex-block { font-size: .8em; }
  .derivative-block { font-size: .66em; }
  .e2e-verdict { padding: 18px 12px; }
  .e2e-verdict strong { font-size: 12px; }
  .math-review-hero { width: min(100% - 32px,1180px); padding-top: 72px; }
  .standalone-math-body .math-review-footer { width: min(100% - 32px,1180px); grid-template-columns: 1fr; gap: 8px; }
  .math-appendix { padding: 78px 0 86px; }
  .derivation-card { grid-template-columns: 1fr; }
  .derivation-index { padding: 15px 20px; border-right: 0; border-bottom: 1px solid rgba(255,253,247,.16); text-align: left; }
  .derivation-body { padding: 24px 20px 28px; }
  .math-steps div { grid-template-columns: 1fr; gap: 6px; }
  .two-formulas, .coupling-grid, .boundary-pair { grid-template-columns: 1fr; }
  .math-conclusion { align-items: flex-start; flex-direction: column; gap: 8px; }
  .section-shell { width: min(100% - 30px, 1180px); }
  .site-header { min-height: 62px; padding-inline: 15px; }
  .wordmark-copy,
  nav a:not(.nav-paper) { display: none; }
  nav a.program-link { display: inline-flex; }
  .nav-paper { padding: 9px 12px; }
  .hero { padding-block: 58px 72px; gap: 54px; }
  h1 { font-size: clamp(48px, 15vw, 68px); }
  .hero-lede { font-size: 16px; }
  .eyebrow-row { align-items: flex-start; flex-direction: column; }
  .hero-model { padding: 14px; box-shadow: 8px 8px 0 rgba(16,35,29,.11); transform: none; }
  .model-observed { grid-template-columns: 66px 18px 1fr; padding-inline: 0; }
  .node { padding: 9px; }
  .effect-formula { font-size: 20px; }
  .metric-band { grid-template-columns: 1fr 1fr; }
  .metric-band > div:nth-child(2) { border-right: 0; }
  .metric-band > div { border-bottom: 1px solid rgba(255,255,255,.18); }
  .idea-section,
  .stable-section,
  .loss-section,
  .experiment-section,
  .reproduce-section { padding-block: 88px; }
  .section-heading-grid,
  .experiment-heading { gap: 28px; margin-bottom: 42px; }
  .shift-grid,
  .claims-grid,
  .evidence-grid { grid-template-columns: 1fr; }
  .estimand-card { grid-column: auto; grid-template-columns: 1fr; }
  .estimand-card p { grid-column: auto; }
  .estimand-formula { flex-wrap: wrap; }
  .stable-grid { gap: 54px; }
  .formula-board { padding: 20px 14px; }
  .property-list { grid-template-columns: 1fr; }
  .property-list > div { border-bottom: 1px solid rgba(255,255,255,.15); }
  .steps-grid { grid-template-columns: 1fr; margin-top: 60px; }
  .steps-grid article,
  .steps-grid article + article { min-height: auto; padding: 28px 0; border-right: 0; border-bottom: 1px solid rgba(255,255,255,.2); }
  .loss-foot { flex-direction: column; gap: 8px; }
  .result-callout { display: block; }
  .result-callout .ratio { margin: 20px 0 8px; }
  .mini-bars { margin-top: 28px; }
  .footer-main,
  .footer-bottom { flex-direction: column; }
  .footer-links { align-items: flex-start; }
}

@media (prefers-reduced-motion: no-preference) {
  .hero-copy,
  .hero-model { animation: enter 700ms cubic-bezier(.2,.8,.2,1) both; }
  .hero-model { animation-delay: 120ms; }
  @keyframes enter {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
  }
}

.guide-section { padding-block: 96px 112px; scroll-margin-top: 72px; }
.guide-heading { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 48px; align-items: end; margin-bottom: 28px; }
.guide-heading h2 { margin: 14px 0 12px; font: 500 clamp(42px, 5vw, 68px)/1.05 var(--display); letter-spacing: -.04em; }
.guide-heading p { max-width: 720px; margin: 0; color: var(--ink-soft); font-size: 17px; }
.guide-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 10px; max-width: 520px; }
.guide-actions > span { flex-basis: 100%; color: var(--ink-soft); text-align: right; font: 700 10px/1.3 var(--mono); letter-spacing: .07em; }
.guide-actions .text-link { align-self: center; margin-left: 8px; }
.guide-frame { display: block; width: 100%; height: min(78vh, 920px); min-height: 560px; border: 1px solid var(--ink); border-radius: 8px; background: white; }
.guide-feedback { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 18px; color: var(--ink-soft); font-size: 14px; }
.guide-feedback a { border-bottom: 1px solid currentColor; color: var(--ink); font-weight: 700; }
@media (max-width: 760px) {
  .guide-heading { grid-template-columns: 1fr; gap: 24px; }
  .guide-actions { justify-content: flex-start; }
  .guide-actions > span { text-align: left; }
  .guide-frame { min-height: 480px; }
}

/* Binary-treatment advantage stage result */
.reliability-entry-home {
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  background: var(--acid);
}

.reliability-entry-home-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(320px, .75fr) 210px;
  min-height: 340px;
}

.reliability-entry-home-copy { padding: 52px 50px 52px 0; }
.reliability-entry-home-kicker { display: flex; gap: 10px; align-items: center; color: #294c00; font: 800 10px/1.3 var(--mono); letter-spacing: .08em; }
.reliability-entry-home-kicker i { width: 7px; height: 7px; border-radius: 50%; background: var(--ink); box-shadow: 0 0 0 5px rgba(16,35,29,.1); }
.reliability-entry-home h2 { max-width: 720px; margin: 16px 0; font: 500 clamp(34px, 4vw, 54px)/1.05 var(--display); letter-spacing: -.04em; }
.reliability-entry-home-copy p { max-width: 720px; margin: 0; color: #385135; font-size: 14px; }
.reliability-entry-home-link { display: inline-flex; gap: 16px; align-items: center; margin-top: 24px; border-bottom: 1px solid var(--ink); color: var(--ink); font-size: 14px; font-weight: 750; }
.reliability-entry-home-metrics { display: grid; border-inline: 1px solid rgba(16,35,29,.3); }
.reliability-entry-home-metrics > div { display: grid; grid-template-columns: 92px 1fr; gap: 5px 14px; align-content: center; padding: 24px; border-bottom: 1px solid rgba(16,35,29,.25); }
.reliability-entry-home-metrics > div:last-child { border-bottom: 0; }
.reliability-entry-home-metrics span { color: #365e00; font: 800 9px/1.3 var(--mono); text-transform: uppercase; }
.reliability-entry-home-metrics strong { font: 500 26px/1 var(--display); letter-spacing: -.04em; }
.reliability-entry-home-metrics p { grid-column: 2; margin: 0; color: #486342; font: 650 9px/1.35 var(--mono); text-transform: uppercase; }
.reliability-entry-home-boundary { display: flex; flex-direction: column; justify-content: flex-end; padding: 28px 0 34px 28px; background: var(--coral); }
.reliability-entry-home-boundary span { font: 800 9px/1 var(--mono); letter-spacing: .09em; }
.reliability-entry-home-boundary p { margin: 10px 18px 0 0; font: 600 16px/1.35 var(--display); }

.advantage-entry {
  border-top: 1px solid rgba(255, 255, 255, .1);
  border-bottom: 1px solid var(--ink);
  background: var(--ink);
  color: var(--cream);
}

.advantage-entry-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, .75fr) 210px;
  gap: 0;
  min-height: 330px;
}

.advantage-entry-copy {
  padding: 54px 50px 54px 0;
}

.advantage-entry-kicker {
  display: flex;
  gap: 10px;
  align-items: center;
  color: var(--acid);
  font: 700 10px/1.3 var(--mono);
  letter-spacing: .09em;
}

.advantage-entry-kicker i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--acid);
  box-shadow: 0 0 0 5px rgba(200, 243, 107, .12);
}

.advantage-entry h2 {
  max-width: 680px;
  margin: 16px 0 16px;
  font: 500 clamp(34px, 4vw, 54px)/1.05 var(--display);
  letter-spacing: -.04em;
}

.advantage-entry-copy p {
  max-width: 720px;
  margin: 0;
  color: rgba(255, 253, 247, .66);
  font-size: 14px;
}

.advantage-entry-link {
  display: inline-flex;
  gap: 16px;
  align-items: center;
  margin-top: 24px;
  border-bottom: 1px solid var(--acid);
  color: var(--acid);
  font-size: 14px;
  font-weight: 750;
}

.advantage-entry-metrics {
  display: grid;
  border-inline: 1px solid rgba(255, 255, 255, .14);
}

.advantage-entry-metrics > div {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 14px;
  align-items: center;
  padding: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, .14);
}

.advantage-entry-metrics > div:last-child { border-bottom: 0; }
.advantage-entry-metrics strong { color: var(--acid); font: 500 32px/1 var(--display); letter-spacing: -.04em; }
.advantage-entry-metrics span { color: rgba(255,255,255,.58); font: 600 9px/1.45 var(--mono); text-transform: uppercase; }

.advantage-entry-boundary {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 28px 0 34px 28px;
  background: var(--coral);
  color: var(--ink);
}

.advantage-entry-boundary span { font: 800 9px/1 var(--mono); letter-spacing: .09em; }
.advantage-entry-boundary p { margin: 10px 18px 0 0; font: 600 16px/1.35 var(--display); }

.binary-advantage-page {
  background:
    linear-gradient(90deg, rgba(16,35,29,.035) 1px, transparent 1px) 50% 0 / 72px 100%,
    var(--paper);
}

.binary-result-hero {
  padding: 112px 0 104px;
}

.binary-result-kicker {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--ink);
  color: var(--ink-soft);
  font: 700 10px/1.3 var(--mono);
  letter-spacing: .08em;
}

.binary-result-kicker span { color: #5f870d; }
.binary-result-kicker b { font-weight: 600; }

.binary-result-hero h1 {
  max-width: 1050px;
  margin: 38px 0 30px;
  font: 500 clamp(55px, 7.2vw, 102px)/.94 var(--display);
  letter-spacing: -.065em;
}

.binary-result-hero h1 em {
  display: block;
  color: var(--coral);
  font-style: italic;
}

.binary-result-lede {
  max-width: 900px;
  margin: 0;
  color: var(--ink-soft);
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.65;
}

.binary-result-lede strong { color: var(--ink); }
.binary-hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 34px; }

.binary-verdict {
  scroll-margin-top: 72px;
  border-block: 1px solid var(--ink);
  background: var(--acid);
}

.binary-verdict-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(420px, .8fr);
  gap: 70px;
  align-items: center;
  padding-block: 56px;
}

.binary-verdict-copy > span {
  font: 800 10px/1 var(--mono);
  letter-spacing: .09em;
  text-transform: uppercase;
}

.binary-verdict-copy h2 {
  margin: 12px 0 12px;
  font: 500 clamp(34px, 4.5vw, 60px)/1 var(--display);
  letter-spacing: -.05em;
}

.binary-verdict-copy p { max-width: 690px; margin: 0; color: #304329; font-size: 14px; }
.binary-verdict-stats { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid rgba(16,35,29,.45); }
.binary-verdict-stats > div { min-width: 0; padding: 22px 18px; border-right: 1px solid rgba(16,35,29,.35); }
.binary-verdict-stats > div:last-child { border-right: 0; }
.binary-verdict-stats strong { display: block; font: 500 34px/1 var(--display); letter-spacing: -.05em; }
.binary-verdict-stats span { display: block; margin-top: 8px; color: #405634; font: 650 8px/1.45 var(--mono); text-transform: uppercase; }

.binary-section {
  padding-block: 112px;
  scroll-margin-top: 70px;
}

.binary-section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, .65fr);
  gap: 80px;
  align-items: end;
  margin: 24px 0 52px;
}

.binary-section-heading h2 {
  margin: 0;
  font: 500 clamp(42px, 5.6vw, 76px)/1.02 var(--display);
  letter-spacing: -.052em;
}

.binary-section-heading p { margin: 0 0 5px; color: var(--ink-soft); font-size: 16px; }

.identification-ledger {
  overflow: hidden;
  border: 1px solid var(--ink);
  border-radius: 6px;
  background: var(--cream);
}

.identification-ledger > div {
  display: grid;
  grid-template-columns: 1.05fr 1.25fr 1.3fr 1.4fr;
  gap: 0;
  border-bottom: 1px solid var(--line);
}

.identification-ledger > div:last-child { border-bottom: 0; }
.identification-ledger > div > * { padding: 22px; border-right: 1px solid var(--line); }
.identification-ledger > div > *:last-child { border-right: 0; }
.identification-ledger strong { font: 600 18px/1.3 var(--display); }
.identification-ledger span { color: var(--ink-soft); font-size: 13px; }
.identification-ledger .identification-ledger-head { background: var(--ink); color: var(--cream); }
.identification-ledger-head b { padding-block: 14px !important; font: 700 9px/1.2 var(--mono); letter-spacing: .06em; text-transform: uppercase; }

.saturation-note {
  display: grid;
  grid-template-columns: 230px 1fr;
  gap: 34px;
  margin-top: 20px;
  padding: 24px 28px;
  border: 1px solid #cd745b;
  background: #f4e5df;
}

.saturation-note span { color: #a84227; font: 750 10px/1.5 var(--mono); letter-spacing: .07em; text-transform: uppercase; }
.saturation-note p { margin: 0; color: #593d35; font-size: 14px; }

.binary-rank-section { border-block: 1px solid var(--line); background: var(--cream); }
.advantage-result-grid { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(300px, .7fr); gap: 18px; }

.advantage-scorecard {
  overflow: hidden;
  border: 1px solid var(--ink);
  border-radius: 7px;
  background: var(--paper);
}

.scorecard-topline,
.scorecard-header,
.advantage-result-row {
  display: grid;
  grid-template-columns: minmax(170px, 1fr) minmax(120px, .65fr) minmax(120px, .65fr);
  align-items: center;
}

.scorecard-topline { padding: 15px 20px; border-bottom: 1px solid var(--ink); background: var(--ink); color: var(--cream); }
.scorecard-topline span { color: var(--acid); font: 800 9px/1 var(--mono); letter-spacing: .08em; }
.scorecard-topline b { grid-column: 2 / -1; font: 600 9px/1.3 var(--mono); text-align: right; }
.scorecard-header { color: var(--ink-soft); font: 700 9px/1.3 var(--mono); text-transform: uppercase; }
.scorecard-header > * { padding: 16px 20px; border-right: 1px solid var(--line); }
.scorecard-header > *:last-child { border-right: 0; }
.advantage-result-row { border-block: 1px solid var(--line); background: var(--cream); }
.advantage-result-row > * { padding: 24px 20px; border-right: 1px solid var(--line); }
.advantage-result-row > *:last-child { border-right: 0; }
.advantage-result-row span { font-weight: 700; }
.advantage-result-row strong { color: #5f870d; font: 500 42px/1 var(--display); letter-spacing: -.045em; }
.advantage-result-row b { color: var(--ink); font: 500 42px/1 var(--display); letter-spacing: -.045em; }
.scorecard-evidence { display: grid; grid-template-columns: repeat(4, 1fr); }
.scorecard-evidence > div { padding: 20px; border-right: 1px solid var(--line); }
.scorecard-evidence > div:last-child { border-right: 0; }
.scorecard-evidence span { display: block; color: var(--ink-soft); font: 700 8px/1.3 var(--mono); text-transform: uppercase; }
.scorecard-evidence strong { display: block; margin-top: 8px; font: 650 16px/1.25 var(--display); }

.advantage-boundary-card,
.token-interpretation-card {
  padding: 30px;
  border: 1px solid #ca765f;
  border-radius: 7px;
  background: #f4e5df;
}

.advantage-boundary-card > span,
.token-interpretation-card > span { color: #a84227; font: 800 9px/1 var(--mono); letter-spacing: .09em; }
.advantage-boundary-card h3,
.token-interpretation-card h3 { margin: 16px 0; font: 500 30px/1.15 var(--display); letter-spacing: -.025em; }
.advantage-boundary-card > strong { display: block; color: #a84227; font: 600 22px/1.2 var(--display); }
.advantage-boundary-card p,
.token-interpretation-card p { margin: 18px 0 0; color: #654b43; font-size: 13px; }

.optimization-warning {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 28px;
  margin-top: 18px;
  padding: 22px 26px;
  border: 1px dashed var(--ink-soft);
  color: var(--ink-soft);
}

.optimization-warning b { font: 750 10px/1.4 var(--mono); text-transform: uppercase; }
.optimization-warning p { margin: 0; font-size: 13px; }

.binary-token-section { background: var(--ink); color: var(--cream); }
.binary-section-heading-light p { color: rgba(255,253,247,.64); }
.binary-section-heading-light strong { color: var(--cream); }

.token-equation-board {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 54px minmax(0, 1fr);
  gap: 12px;
  align-items: stretch;
  padding: 24px;
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 8px;
  background: #172c25;
}

.token-equation-board > div { display: grid; gap: 12px; align-content: center; padding: 24px; }
.token-equation-board span { color: var(--acid); font: 750 9px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.token-equation-board b { font: 500 clamp(16px, 2vw, 23px)/1.5 var(--display); }
.token-equation-board > i { display: grid; place-items: center; color: var(--acid); font: 500 35px/1 var(--display); }
.token-equation-result { border-left: 3px solid var(--acid); background: #0e211b; }
.token-equation-result p { margin: 0; color: rgba(255,255,255,.58); font-size: 13px; }

.scale-comparison { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 14px; }
.scale-comparison article { padding: 24px; border: 1px solid rgba(255,255,255,.18); background: rgba(255,255,255,.03); }
.scale-comparison span { color: var(--acid); font: 750 9px/1 var(--mono); letter-spacing: .08em; }
.scale-comparison h3 { margin: 15px 0 10px; overflow-x: auto; font: 500 clamp(17px, 1.8vw, 22px)/1.5 var(--display); white-space: nowrap; }
.scale-comparison p { margin: 0; color: rgba(255,255,255,.54); font-size: 12px; }
.token-result-grid { margin-top: 18px; }

.scorecard-dark { border-color: rgba(255,255,255,.35); background: #172c25; }
.scorecard-dark .scorecard-topline { border-color: rgba(255,255,255,.2); background: #0b1b16; }
.scorecard-dark .scorecard-header { color: rgba(255,255,255,.52); }
.scorecard-dark .scorecard-header > *,
.scorecard-dark .advantage-result-row > *,
.scorecard-dark .scorecard-evidence > div { border-color: rgba(255,255,255,.16); }
.scorecard-dark .advantage-result-row { border-color: rgba(255,255,255,.18); background: #10231d; }
.scorecard-dark .advantage-result-row b { color: var(--cream); }
.scorecard-dark .scorecard-evidence span { color: rgba(255,255,255,.46); }

.token-interpretation-card { border-color: rgba(200,243,107,.5); background: rgba(200,243,107,.1); }
.token-interpretation-card > span { color: var(--acid); }
.token-interpretation-card h3 { color: var(--cream); }
.token-interpretation-card ul { display: grid; gap: 8px; margin: 0; padding-left: 20px; color: rgba(255,255,255,.66); font-size: 13px; }
.token-interpretation-card p { color: rgba(255,255,255,.58); }

.counterworld-section { padding-block: 112px; border-bottom: 1px solid var(--line); background: var(--paper-deep); }
.counterworld-flow { max-width: 980px; margin: 0 auto; }
.counterworld-source { display: grid; gap: 8px; width: min(560px, 100%); margin: 0 auto; padding: 22px 28px; border: 1px solid var(--ink); background: var(--cream); text-align: center; }
.counterworld-source span { color: var(--ink-soft); font: 750 9px/1 var(--mono); letter-spacing: .09em; }
.counterworld-source strong { font: 600 17px/1.35 var(--display); }
.counterworld-branch { position: relative; height: 58px; }
.counterworld-branch::before { position: absolute; top: 0; left: 50%; width: 1px; height: 24px; background: var(--ink); content: ""; }
.counterworld-branch::after { position: absolute; top: 24px; left: 25%; width: 50%; height: 1px; background: var(--ink); content: ""; }
.counterworld-branch i { position: absolute; top: 24px; width: 1px; height: 34px; background: var(--ink); }
.counterworld-branch i:first-child { left: 25%; }
.counterworld-branch i:last-child { right: 25%; }
.counterworld-worlds { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.counterworld-worlds article { display: grid; gap: 10px; padding: 34px; border: 1px solid var(--ink); }
.counterworld-worlds span { font: 750 9px/1.3 var(--mono); letter-spacing: .07em; text-transform: uppercase; }
.counterworld-worlds strong { font: 500 34px/1.1 var(--display); }
.counterworld-worlds b { font: 700 17px/1.2 var(--mono); }
.world-same { background: var(--acid); }
.world-independent { background: #f4e5df; }
.world-independent b { color: #a84227; }

.counterworld-conclusion {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 36px;
  max-width: 980px;
  margin: 18px auto 0;
  padding: 25px 28px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--cream);
}
.counterworld-conclusion b { color: var(--acid); font: 600 19px/1.35 var(--display); }
.counterworld-conclusion p { margin: 0; color: rgba(255,255,255,.64); font-size: 13px; }

.binary-claim-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.binary-claim-grid article { padding: 32px; border: 1px solid var(--ink); }
.binary-claim-grid span { font: 800 9px/1 var(--mono); letter-spacing: .09em; }
.binary-claim-grid ul { margin: 22px 0 0; padding-left: 20px; }
.binary-claim-grid li + li { margin-top: 10px; }
.binary-claim-yes { background: rgba(200,243,107,.25); }
.binary-claim-yes span { color: #5f870d; }
.binary-claim-no { background: #f4e5df; }
.binary-claim-no span { color: #a84227; }

.binary-audit-strip { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 18px; border: 1px solid var(--ink); background: var(--cream); }
.binary-audit-strip > div { padding: 22px; border-right: 1px solid var(--line); }
.binary-audit-strip > div:last-child { border-right: 0; }
.binary-audit-strip span { display: block; color: var(--ink-soft); font: 700 8px/1.3 var(--mono); text-transform: uppercase; }
.binary-audit-strip strong { display: block; margin-top: 7px; font: 600 14px/1.35 var(--display); }

@media (max-width: 1080px) {
  .reliability-entry-home-inner { grid-template-columns: minmax(0, 1fr) 310px; }
  .reliability-entry-home-boundary { grid-column: 1 / -1; min-height: 110px; padding: 24px 28px; }
  .reliability-entry-home-boundary p { max-width: 650px; }
  .advantage-entry-inner { grid-template-columns: minmax(0, 1fr) 310px; }
  .advantage-entry-boundary { grid-column: 1 / -1; min-height: 110px; padding: 24px 28px; }
  .advantage-entry-boundary p { max-width: 650px; }
  .binary-verdict-inner { grid-template-columns: 1fr; gap: 34px; }
  .binary-section-heading { grid-template-columns: 1fr; gap: 24px; }
}

@media (max-width: 820px) {
  .reliability-entry-home-inner { grid-template-columns: 1fr; }
  .reliability-entry-home-copy { padding: 46px 0; }
  .reliability-entry-home-metrics { grid-template-columns: repeat(3, 1fr); border: 1px solid rgba(16,35,29,.3); }
  .reliability-entry-home-metrics > div { grid-template-columns: 1fr; align-content: start; border-right: 1px solid rgba(16,35,29,.25); border-bottom: 0; }
  .reliability-entry-home-metrics > div:last-child { border-right: 0; }
  .reliability-entry-home-metrics p { grid-column: auto; }
  .advantage-entry-inner { grid-template-columns: 1fr; }
  .advantage-entry-copy { padding: 46px 0; }
  .advantage-entry-metrics { grid-template-columns: repeat(3, 1fr); border: 1px solid rgba(255,255,255,.14); }
  .advantage-entry-metrics > div { grid-template-columns: 1fr; align-content: start; border-right: 1px solid rgba(255,255,255,.14); border-bottom: 0; }
  .advantage-entry-metrics > div:last-child { border-right: 0; }
  .binary-result-hero { padding-block: 86px; }
  .identification-ledger > div { grid-template-columns: 1fr 1fr; }
  .identification-ledger > div > * { border-bottom: 1px solid var(--line); }
  .identification-ledger > div > *:nth-child(2n) { border-right: 0; }
  .identification-ledger > div > *:nth-last-child(-n+2) { border-bottom: 0; }
  .advantage-result-grid { grid-template-columns: 1fr; }
  .token-equation-board { grid-template-columns: 1fr; }
  .token-equation-board > i { transform: rotate(90deg); }
  .token-equation-result { border-top: 3px solid var(--acid); border-left: 0; }
  .binary-audit-strip { grid-template-columns: 1fr 1fr; }
  .binary-audit-strip > div:nth-child(2) { border-right: 0; }
  .binary-audit-strip > div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
}

@media (max-width: 620px) {
  .reliability-entry-home-copy { padding-inline: 0; }
  .reliability-entry-home-metrics { grid-template-columns: 1fr; }
  .reliability-entry-home-metrics > div { grid-template-columns: 100px 1fr; border-right: 0; border-bottom: 1px solid rgba(16,35,29,.25); }
  .reliability-entry-home-metrics > div:last-child { border-bottom: 0; }
  .reliability-entry-home-metrics p { grid-column: 2; }
  .advantage-entry-copy { padding-inline: 0; }
  .advantage-entry-metrics { grid-template-columns: 1fr; }
  .advantage-entry-metrics > div { grid-template-columns: 90px 1fr; border-right: 0; border-bottom: 1px solid rgba(255,255,255,.14); }
  .advantage-entry-metrics > div:last-child { border-bottom: 0; }
  .binary-result-kicker { align-items: flex-start; flex-direction: column; }
  .binary-result-hero h1 { font-size: clamp(48px, 15vw, 68px); }
  .binary-verdict-stats { grid-template-columns: 1fr; }
  .binary-verdict-stats > div { border-right: 0; border-bottom: 1px solid rgba(16,35,29,.35); }
  .binary-verdict-stats > div:last-child { border-bottom: 0; }
  .binary-section,
  .counterworld-section { padding-block: 82px; }
  .identification-ledger > div { grid-template-columns: 1fr; }
  .identification-ledger > div > * { border-right: 0; border-bottom: 1px solid var(--line) !important; }
  .identification-ledger > div > *:last-child { border-bottom: 0 !important; }
  .identification-ledger-head { display: none !important; }
  .saturation-note,
  .optimization-warning,
  .counterworld-conclusion { grid-template-columns: 1fr; gap: 10px; }
  .scorecard-topline { grid-template-columns: 1fr; gap: 8px; }
  .scorecard-topline b { grid-column: auto; text-align: left; }
  .scorecard-header,
  .advantage-result-row { grid-template-columns: 1fr 1fr; }
  .scorecard-header > span,
  .advantage-result-row > span { grid-column: 1 / -1; border-right: 0; border-bottom: 1px solid var(--line); }
  .scorecard-evidence { grid-template-columns: 1fr 1fr; }
  .scorecard-evidence > div:nth-child(2) { border-right: 0; }
  .scorecard-evidence > div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .scale-comparison,
  .counterworld-worlds,
  .binary-claim-grid { grid-template-columns: 1fr; }
  .counterworld-branch { display: none; }
  .counterworld-worlds { margin-top: 12px; }
  .binary-audit-strip { grid-template-columns: 1fr; }
  .binary-audit-strip > div { border-right: 0; border-bottom: 1px solid var(--line); }
  .binary-audit-strip > div:last-child { border-bottom: 0; }
}

/* IHDP fresh-data reliability audit · Stage Result II */
.ihdp-reliability-page {
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(16,35,29,.035) 1px, transparent 1px) 50% 0 / 72px 100%,
    var(--paper);
  font-variant-numeric: tabular-nums;
}

.reliability-stage-index {
  display: none;
}

.reliability-hero {
  padding-block: 92px 104px;
}

.reliability-kicker {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--ink);
  color: var(--ink-soft);
  font: 700 11px/1.35 var(--mono);
  letter-spacing: .07em;
}

.reliability-kicker span { color: #365e00; }
.reliability-kicker b { font-weight: 600; }

.reliability-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(360px, .65fr);
  gap: 82px;
  align-items: end;
  padding-top: 46px;
}

.reliability-overline {
  margin: 0 0 18px;
  color: var(--ink-soft);
  font: 700 13px/1.4 var(--mono);
  letter-spacing: .02em;
}

.reliability-hero h1 {
  max-width: 800px;
  margin: 0;
  font: 500 clamp(58px, 7vw, 84px)/.95 var(--display);
  letter-spacing: -.065em;
}

.reliability-hero h1 em {
  display: block;
  color: var(--coral);
  font-style: italic;
}

.reliability-hero-copy p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 18px;
  line-height: 1.7;
}

.reliability-hero-copy > strong {
  display: block;
  margin-top: 24px;
  padding-left: 18px;
  border-left: 3px solid var(--coral);
  font: 600 18px/1.5 var(--display);
}

.reliability-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
}

.reliability-outcomes {
  scroll-margin-top: 72px;
  border-block: 1px solid var(--ink);
  background: var(--cream);
}

.reliability-outcome-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.reliability-outcome {
  min-height: 365px;
  padding: 48px;
}

.reliability-outcome + .reliability-outcome { border-left: 1px solid var(--ink); }
.reliability-outcome-reproduced { background: var(--acid); }
.reliability-outcome-reversed { background: #f4ded6; }

.reliability-outcome > span {
  display: block;
  color: #294c00;
  font: 800 11px/1.3 var(--mono);
  letter-spacing: .07em;
}

.reliability-outcome-reversed > span { color: #8f2e18; }

.reliability-outcome h2 {
  max-width: 510px;
  margin: 18px 0 30px;
  font: 500 clamp(30px, 3.8vw, 48px)/1.05 var(--display);
  letter-spacing: -.04em;
}

.reliability-outcome > strong {
  display: block;
  font: 500 clamp(43px, 5vw, 68px)/1 var(--display);
  letter-spacing: -.055em;
}

.reliability-outcome p {
  max-width: 560px;
  margin: 20px 0 0;
  color: #334338;
  font-size: 14px;
}

.reliability-outcome-reversed p { color: #65483f; }

.reliability-truth-note {
  display: grid;
  grid-template-columns: 230px 1fr;
  gap: 42px;
  margin-top: 26px;
  padding: 25px 28px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--cream);
}

.reliability-truth-note > span {
  color: var(--acid);
  font: 800 11px/1.5 var(--mono);
  letter-spacing: .07em;
  text-transform: uppercase;
}

.reliability-truth-note p { margin: 0; color: rgba(255,253,247,.7); font-size: 14px; }
.reliability-truth-note strong { color: var(--cream); }

.reliability-section {
  padding-block: 112px;
  scroll-margin-top: 70px;
}

.reliability-section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, .65fr);
  gap: 80px;
  align-items: end;
  margin: 24px 0 52px;
}

.reliability-section-heading h2 {
  max-width: 760px;
  margin: 0;
  font: 500 clamp(42px, 5.5vw, 73px)/1.02 var(--display);
  letter-spacing: -.052em;
}

.reliability-section-heading p {
  max-width: 560px;
  margin: 0 0 5px;
  color: var(--ink-soft);
  font-size: 16px;
}

.reliability-protocol-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.reliability-protocol-grid article {
  display: grid;
  min-height: 330px;
  padding: 34px;
  border: 1px solid var(--ink);
  background: var(--cream);
}

.reliability-protocol-grid article > div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font: 750 11px/1.3 var(--mono);
  letter-spacing: .06em;
}

.reliability-protocol-grid article > div span { color: #365e00; }
.reliability-protocol-grid article:nth-child(2) > div span { color: #8f2e18; }
.reliability-protocol-grid article > div b { color: var(--ink-soft); font-weight: 600; }

.reliability-protocol-grid h3 {
  margin: 28px 0 14px;
  font: 500 clamp(30px, 3.6vw, 44px)/1.08 var(--display);
  letter-spacing: -.035em;
}

.reliability-protocol-grid p { align-self: start; margin: 0; color: var(--ink-soft); font-size: 14px; }

.protocol-result {
  align-self: end;
  justify-self: start;
  margin-top: 28px;
  padding: 8px 11px;
  font: 800 11px/1.25 var(--mono);
  letter-spacing: .04em;
}

.protocol-result-positive { background: var(--acid); color: var(--ink); }
.protocol-result-reversed { background: #f4ded6; color: #782813; }

.reliability-logic {
  display: grid;
  grid-template-columns: minmax(300px, .7fr) minmax(0, 1.3fr);
  gap: 58px;
  margin-top: 20px;
  padding: 42px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--cream);
}

.reliability-logic-copy > span {
  color: var(--acid);
  font: 800 11px/1 var(--mono);
  letter-spacing: .08em;
}

.reliability-logic h3 {
  margin: 18px 0;
  font: 500 clamp(30px, 3.4vw, 45px)/1.08 var(--display);
  letter-spacing: -.035em;
}

.reliability-logic-copy p { margin: 0; color: rgba(255,253,247,.65); font-size: 14px; }
.reliability-logic-copy strong { color: var(--cream); }

.latent-flow {
  display: grid;
  grid-template-columns: 1fr 26px 1.15fr 26px 1fr 26px 1.15fr;
  gap: 8px;
  align-items: center;
}

.latent-flow > div {
  display: grid;
  align-content: center;
  min-height: 175px;
  padding: 18px;
  border: 1px solid rgba(255,255,255,.2);
  background: #172c25;
}

.latent-flow span { color: var(--acid); font: 750 10px/1.3 var(--mono); text-transform: uppercase; }
.latent-flow strong { margin-top: 17px; font: 600 20px/1.25 var(--display); }
.latent-flow small { margin-top: 9px; color: rgba(255,255,255,.5); font-size: 11px; line-height: 1.45; }
.latent-flow > i { color: var(--acid); text-align: center; font: 500 25px/1 var(--display); }

.bias-variance-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-top: 18px;
}

.bias-variance-grid article {
  padding: 34px;
  border: 1px solid var(--ink);
  background: rgba(200,243,107,.24);
}

.bias-variance-grid article:last-child { background: #f4ded6; }
.bias-variance-grid span { color: #365e00; font: 800 11px/1.3 var(--mono); letter-spacing: .06em; }
.bias-variance-grid article:last-child span { color: #8f2e18; }
.bias-variance-grid h3 { margin: 16px 0 12px; font: 600 25px/1.2 var(--display); }
.bias-variance-grid p { margin: 0; color: var(--ink-soft); font-size: 14px; }
.bias-variance-grid b { display: block; margin-top: 22px; font: 600 18px/1.3 var(--display); }

.rank-one-takeaway {
  margin: 18px 0 0;
  padding: 24px 28px;
  border-left: 5px solid var(--coral);
  background: var(--cream);
  font: 500 21px/1.45 var(--display);
}

.reliability-fairness {
  padding-block: 112px;
  background: var(--ink);
  color: var(--cream);
}

.reliability-heading-light p { color: rgba(255,253,247,.62); }
.fairness-grid { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid rgba(255,255,255,.2); }

.fairness-grid article {
  min-height: 260px;
  padding: 28px;
  border-right: 1px solid rgba(255,255,255,.18);
  background: #172c25;
}

.fairness-grid article:last-child { border-right: 0; }
.fairness-grid span { color: var(--acid); font: 750 12px/1 var(--mono); }
.fairness-grid h3 { margin: 44px 0 14px; font: 600 23px/1.16 var(--display); }
.fairness-grid p { margin: 0; color: rgba(255,255,255,.58); font-size: 13px; }

.fairness-footnote {
  margin: 18px 0 0;
  padding: 18px 22px;
  border: 1px solid rgba(200,243,107,.45);
  color: rgba(255,255,255,.68);
  font-size: 13px;
}

.legacy-slope-figure {
  margin: 0;
  padding: 32px;
  border: 1px solid var(--ink);
  background: var(--cream);
}

.legacy-slope-figure figcaption,
.transfer-dotplot figcaption,
.forest-figure figcaption {
  display: flex;
  justify-content: space-between;
  gap: 22px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.legacy-slope-figure figcaption span,
.transfer-dotplot figcaption span,
.forest-figure figcaption span {
  color: var(--ink-soft);
  font: 750 11px/1.3 var(--mono);
  letter-spacing: .05em;
}

.legacy-slope-figure figcaption strong,
.transfer-dotplot figcaption strong,
.forest-figure figcaption strong { font: 600 17px/1.3 var(--display); }
.legacy-slope-figure svg { display: block; width: 100%; height: auto; margin-top: 26px; }
.slope-axis { stroke: var(--line); stroke-width: 1; stroke-dasharray: 3 5; }
.slope-axis-label { fill: var(--ink-soft); font: 700 11px var(--mono); letter-spacing: .06em; }
.slope-model line { fill: none; stroke-width: 3; }
.slope-model circle { stroke: var(--cream); stroke-width: 2; }
.slope-model text { fill: var(--ink); font: 650 13px var(--sans); }
.slope-model-cfr line, .slope-model-cfr circle { stroke: #586c65; fill: #586c65; }
.slope-model-tarnet line, .slope-model-tarnet circle { stroke: #89938f; fill: #89938f; }
.slope-model-ab line, .slope-model-ab circle { stroke: #567e08; fill: var(--acid-deep); }
.slope-model-t line, .slope-model-t circle { stroke: var(--coral); fill: var(--coral); }
.legacy-slope-figure > p { margin: 10px 0 0; color: var(--ink-soft); font-size: 12px; }

.legacy-interpretation {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: 34px;
  margin-top: 18px;
  padding: 25px 28px;
  border: 1px solid var(--ink);
  background: rgba(200,243,107,.2);
}

.legacy-interpretation strong { font: 600 20px/1.35 var(--display); }
.legacy-interpretation p { margin: 0; color: var(--ink-soft); font-size: 14px; }

.reliability-details {
  margin-top: 18px;
  border: 1px solid var(--ink);
  background: var(--cream);
}

.reliability-details summary {
  min-height: 56px;
  padding: 17px 22px;
  cursor: pointer;
  font: 750 13px/1.5 var(--mono);
}

.reliability-details[open] summary { border-bottom: 1px solid var(--ink); }
.reliability-table-wrap { overflow-x: auto; }
.reliability-table-wrap table { width: 100%; min-width: 680px; border-collapse: collapse; }
.reliability-table-wrap caption { padding: 18px 22px; color: var(--ink-soft); text-align: left; font-size: 13px; }
.reliability-table-wrap th, .reliability-table-wrap td { padding: 14px 20px; border-top: 1px solid var(--line); text-align: left; }
.reliability-table-wrap thead th { background: var(--ink); color: var(--cream); font: 750 10px/1.3 var(--mono); letter-spacing: .05em; text-transform: uppercase; }
.reliability-table-wrap tbody th { font-size: 13px; }
.reliability-table-wrap tbody td { color: var(--ink-soft); font: 650 13px/1.3 var(--mono); }

.reliability-transfer {
  padding-block: 112px;
  scroll-margin-top: 70px;
  border-block: 1px solid var(--ink);
  background: var(--paper-deep);
}

.transfer-dashboard { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(340px, .85fr); gap: 18px; }
.transfer-dotplot, .forest-figure { margin: 0; padding: 28px; border: 1px solid var(--ink); background: var(--cream); }
.dotplot-axis { display: flex; justify-content: space-between; margin: 28px 126px 12px 240px; color: var(--ink-soft); font: 700 10px/1 var(--mono); }

.dotplot-row {
  display: grid;
  grid-template-columns: 220px minmax(170px, 1fr) 105px;
  gap: 18px;
  align-items: center;
  min-height: 86px;
  border-top: 1px solid var(--line);
}

.dotplot-row > div:first-child strong { display: block; font: 600 15px/1.25 var(--display); }
.dotplot-row > div:first-child small { color: var(--ink-soft); font-size: 10px; }
.dotplot-track { position: relative; height: 2px; background: var(--line); }
.dotplot-track::before, .dotplot-track::after { position: absolute; top: -4px; width: 1px; height: 10px; background: var(--line); content: ""; }
.dotplot-track::before { left: 33.333%; box-shadow: calc(100% + 33.333%) 0 0 var(--line); }
.dotplot-track::after { right: 0; }
.dotplot-track i { position: absolute; top: 50%; width: 18px; height: 18px; border: 3px solid var(--cream); border-radius: 50%; background: var(--ink); box-shadow: 0 0 0 1px var(--ink); transform: translate(-50%, -50%); }
.dotplot-ab .dotplot-track i { background: var(--coral); box-shadow: 0 0 0 1px #a84227; }
.dotplot-deterministic .dotplot-track i { background: #8f9995; box-shadow: 0 0 0 1px #53615b; }
.dotplot-row > b { font: 600 24px/1 var(--display); text-align: right; }
.dotplot-row > b small { display: block; margin-top: 7px; color: var(--ink-soft); font: 650 9px/1 var(--mono); }

.forest-figure svg { display: block; width: 100%; height: auto; margin-top: 20px; }
.forest-side { fill: var(--ink-soft); font: 750 10px var(--mono); letter-spacing: .06em; }
.forest-baseline { stroke: var(--ink); stroke-width: 1.5; }
.forest-zero { stroke: var(--coral); stroke-width: 2; stroke-dasharray: 5 4; }
.forest-interval { stroke: var(--ink); stroke-width: 5; }
.forest-cap { stroke: var(--ink); stroke-width: 3; }
.forest-point { fill: var(--acid-deep); stroke: var(--ink); stroke-width: 2; }
.forest-tick { fill: var(--ink-soft); font: 650 10px var(--mono); }
.forest-values { display: grid; grid-template-columns: .8fr 1.4fr 1fr; border: 1px solid var(--line); }
.forest-values div { padding: 16px; border-right: 1px solid var(--line); }
.forest-values div:last-child { border-right: 0; }
.forest-values span { display: block; color: var(--ink-soft); font: 700 9px/1.3 var(--mono); text-transform: uppercase; }
.forest-values strong { display: block; margin-top: 7px; font: 650 13px/1.3 var(--mono); }

.win-strip-card {
  display: grid;
  grid-template-columns: 280px minmax(260px, 1fr) 160px;
  gap: 32px;
  align-items: center;
  margin-top: 18px;
  padding: 26px 28px;
  border: 1px solid var(--ink);
  background: var(--cream);
}

.win-strip-card > div:first-child > span { color: var(--ink-soft); font: 750 10px/1 var(--mono); letter-spacing: .05em; }
.win-strip-card > div:first-child > strong { display: block; margin-top: 10px; font: 600 25px/1.15 var(--display); }
.win-strip-card p { margin: 8px 0 0; color: var(--ink-soft); font-size: 11px; }
.win-strip { display: grid; grid-template-columns: repeat(10, 1fr); gap: 8px; }
.win-strip > i, .win-legend i { width: 15px; height: 15px; border-radius: 50%; }
.direct-win { display: inline-block; background: var(--ink); }
.ab-win { display: inline-block; background: var(--acid-deep); }
.win-legend { display: grid; gap: 8px; color: var(--ink-soft); font: 700 10px/1.2 var(--mono); }
.win-legend span { display: flex; gap: 8px; align-items: center; }
.win-legend i { width: 10px; height: 10px; }

.transfer-verdict {
  display: grid;
  grid-template-columns: 210px minmax(260px, .75fr) minmax(320px, 1fr);
  gap: 40px;
  align-items: start;
  margin-top: 18px;
  padding: 32px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--cream);
}

.transfer-verdict > span { color: var(--coral); font: 800 11px/1.5 var(--mono); letter-spacing: .06em; }
.transfer-verdict h3 { margin: 0; font: 600 25px/1.25 var(--display); }
.transfer-verdict p { margin: 0; color: rgba(255,255,255,.64); font-size: 14px; }

.attribution-note {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 36px;
  margin-top: 18px;
  padding: 24px 28px;
  border: 1px dashed var(--ink-soft);
}

.attribution-note span { color: #8f2e18; font: 800 11px/1.5 var(--mono); letter-spacing: .06em; }
.attribution-note p { margin: 0; color: var(--ink-soft); font-size: 13px; }

.reliability-claim-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.reliability-claim-grid article { min-height: 320px; padding: 32px; border: 1px solid var(--ink); }
.reliability-claim-grid span { font: 800 11px/1.3 var(--mono); letter-spacing: .06em; text-transform: uppercase; }
.reliability-claim-grid h3 { margin: 28px 0 18px; font: 600 29px/1.15 var(--display); }
.reliability-claim-grid ul { margin: 0; padding-left: 20px; }
.reliability-claim-grid li + li { margin-top: 9px; }
.claim-supported { background: rgba(200,243,107,.25); }
.claim-supported span { color: #365e00; }
.claim-reversed { background: #f4ded6; }
.claim-reversed span { color: #8f2e18; }
.claim-open { background: var(--cream); }
.claim-open span { color: #365f50; }
.claim-not-tested { background: var(--ink); color: var(--cream); }
.claim-not-tested span { color: var(--coral); }
.claim-not-tested li { color: rgba(255,255,255,.7); }

.reliability-audit {
  padding-block: 96px;
  scroll-margin-top: 70px;
  background: var(--ink);
  color: var(--cream);
}

.reliability-audit-copy { display: grid; grid-template-columns: 220px minmax(320px, .8fr) minmax(340px, 1fr); gap: 50px; align-items: start; }
.reliability-audit-copy > span { color: var(--acid); font: 800 11px/1.5 var(--mono); letter-spacing: .07em; }
.reliability-audit-copy h2 { margin: 0; font: 500 clamp(35px, 4.5vw, 57px)/1.05 var(--display); letter-spacing: -.04em; }
.reliability-audit-copy p { margin: 0; color: rgba(255,255,255,.64); font-size: 14px; }

.audit-milestones { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 44px; border: 1px solid rgba(255,255,255,.2); }
.audit-milestones > div { padding: 24px; border-right: 1px solid rgba(255,255,255,.18); background: #172c25; }
.audit-milestones > div:last-child { border-right: 0; }
.audit-milestones span { display: block; color: var(--acid); font: 600 28px/1 var(--display); }
.audit-milestones strong { display: block; margin-top: 10px; color: rgba(255,255,255,.58); font: 700 10px/1.4 var(--mono); text-transform: uppercase; }
.reliability-details-dark { border-color: rgba(255,255,255,.28); background: #172c25; color: var(--cream); }
.reliability-details-dark[open] summary { border-color: rgba(255,255,255,.22); }
.audit-detail-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.audit-detail-grid > div { padding: 22px; border-right: 1px solid rgba(255,255,255,.16); }
.audit-detail-grid > div:last-child { border-right: 0; }
.audit-detail-grid span { color: rgba(255,255,255,.5); font: 700 9px/1.3 var(--mono); text-transform: uppercase; }
.audit-detail-grid strong { display: block; margin-top: 9px; color: var(--acid); font: 600 20px/1.2 var(--display); }
.audit-detail-grid p { margin: 10px 0 0; color: rgba(255,255,255,.56); font-size: 12px; }

.reliability-next { padding-block: 112px; text-align: center; }
.reliability-next > span { color: #365e00; font: 800 11px/1 var(--mono); letter-spacing: .09em; }
.reliability-next h2 { max-width: 930px; margin: 24px auto; font: 500 clamp(42px, 5.4vw, 72px)/1.03 var(--display); letter-spacing: -.05em; }
.reliability-next p { max-width: 780px; margin: 0 auto; color: var(--ink-soft); font-size: 16px; }
.reliability-next-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 34px; }

@media (max-width: 1080px) {
  .reliability-hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .reliability-hero-copy { max-width: 760px; }
  .reliability-section-heading { grid-template-columns: 1fr; gap: 24px; }
  .reliability-logic { grid-template-columns: 1fr; }
  .transfer-dashboard { grid-template-columns: 1fr; }
  .fairness-grid { grid-template-columns: 1fr 1fr; }
  .fairness-grid article:nth-child(2) { border-right: 0; }
  .fairness-grid article:nth-child(-n+2) { border-bottom: 1px solid rgba(255,255,255,.18); }
  .reliability-audit-copy { grid-template-columns: 180px 1fr; }
  .reliability-audit-copy p { grid-column: 2; }
}

@media (max-width: 820px) {
  .reliability-stage-index {
    position: sticky;
    top: 62px;
    z-index: 19;
    display: flex;
    gap: 6px;
    min-height: 50px;
    padding: 6px 16px;
    overflow-x: auto;
    border-bottom: 1px solid var(--line);
    background: rgba(243,240,232,.96);
  }
  .reliability-stage-index a { display: flex; flex: 0 0 auto; align-items: center; min-height: 38px; padding: 0 12px; font: 700 12px/1 var(--mono); }
  .reliability-outcome-grid,
  .reliability-protocol-grid,
  .bias-variance-grid { grid-template-columns: 1fr; }
  .reliability-outcome + .reliability-outcome { border-top: 1px solid var(--ink); border-left: 0; }
  .reliability-truth-note { grid-template-columns: 1fr; gap: 12px; }
  .latent-flow { grid-template-columns: 1fr; }
  .latent-flow > div { min-height: 130px; }
  .latent-flow > i { transform: rotate(90deg); }
  .legacy-interpretation,
  .attribution-note { grid-template-columns: 1fr; gap: 12px; }
  .transfer-verdict { grid-template-columns: 1fr; gap: 18px; }
  .win-strip-card { grid-template-columns: 1fr; gap: 22px; }
  .win-strip { max-width: 460px; }
  .win-legend { grid-template-columns: auto auto; justify-content: start; gap: 20px; }
  .reliability-claim-grid { grid-template-columns: 1fr; }
  .audit-milestones, .audit-detail-grid { grid-template-columns: 1fr 1fr; }
  .audit-milestones > div:nth-child(2), .audit-detail-grid > div:nth-child(2) { border-right: 0; }
  .audit-milestones > div:nth-child(-n+2), .audit-detail-grid > div:nth-child(-n+2) { border-bottom: 1px solid rgba(255,255,255,.18); }
}

@media (max-width: 620px) {
  .reliability-kicker { flex-direction: column; }
  .reliability-hero { padding-block: 70px 78px; }
  .reliability-hero h1 { font-size: clamp(50px, 16vw, 70px); }
  .reliability-hero-copy p { font-size: 16px; }
  .reliability-outcome { min-height: 0; padding: 38px 24px; }
  .reliability-outcome > strong { font-size: 46px; }
  .reliability-section, .reliability-transfer, .reliability-fairness { padding-block: 82px; }
  .reliability-logic, .legacy-slope-figure, .transfer-dotplot, .forest-figure { padding: 24px; }
  .reliability-protocol-grid article { min-height: 0; }
  .legacy-slope-figure { overflow-x: auto; }
  .legacy-slope-figure svg { min-width: 680px; }
  .legacy-slope-figure figcaption,
  .transfer-dotplot figcaption,
  .forest-figure figcaption { flex-direction: column; gap: 8px; }
  .dotplot-axis { display: none; }
  .dotplot-row { grid-template-columns: 1fr 86px; gap: 12px; padding-block: 18px; }
  .dotplot-row > div:first-child { min-width: 0; }
  .dotplot-track { grid-column: 1 / -1; grid-row: 2; }
  .dotplot-row > b { grid-column: 2; grid-row: 1; }
  .forest-values { grid-template-columns: 1fr; }
  .forest-values div { border-right: 0; border-bottom: 1px solid var(--line); }
  .forest-values div:last-child { border-bottom: 0; }
  .win-strip { grid-template-columns: repeat(5, 1fr); max-width: 220px; }
  .win-legend { grid-template-columns: 1fr; }
  .fairness-grid { grid-template-columns: 1fr; }
  .fairness-grid article { min-height: 0; border-right: 0; border-bottom: 1px solid rgba(255,255,255,.18); }
  .fairness-grid article:last-child { border-bottom: 0; }
  .reliability-audit-copy { grid-template-columns: 1fr; gap: 18px; }
  .reliability-audit-copy p { grid-column: auto; }
  .audit-milestones, .audit-detail-grid { grid-template-columns: 1fr; }
  .audit-milestones > div, .audit-detail-grid > div { border-right: 0; border-bottom: 1px solid rgba(255,255,255,.18); }
  .audit-milestones > div:last-child, .audit-detail-grid > div:last-child { border-bottom: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
}