@charset "UTF-8";

:root {
  --paper: #ffffff;
  --paper-soft: #f6f9fa;
  --paper-mint: #f2fbf9;
  --paper-blue: #f3f8fc;
  --ink: #0b1b2a;
  --ink-2: #183044;
  --text: #334b5c;
  --muted: #5f7381;
  --faint: #647783;
  --line: #dce6eb;
  --line-strong: #c7d5dc;
  --teal: #078b84;
  --teal-strong: #06736e;
  --teal-soft: #dff5f2;
  --blue: #216ec6;
  --blue-soft: #e4f0fb;
  --amber: #a96d12;
  --amber-soft: #fff4dd;
  --violet: #7259b2;
  --violet-soft: #f1edfb;
  --coral: #b9514b;
  --coral-soft: #fff0ee;
  --shadow-xs: 0 1px 2px rgba(10, 28, 43, .035), 0 8px 24px rgba(24, 54, 76, .045);
  --shadow-sm: 0 2px 3px rgba(10, 28, 43, .04), 0 18px 48px rgba(24, 54, 76, .075);
  --shadow-lg: 0 24px 80px rgba(18, 56, 77, .1);
  --radius-s: 12px;
  --radius-m: 18px;
  --radius-l: 28px;
  --radius-xl: 38px;
  --page: 1180px;
  --article: 760px;
  --header-h: 68px;
  --ease: cubic-bezier(.2, .75, .25, 1);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Yu Gothic UI", "Yu Gothic", Meiryo, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 72px);
  background: var(--paper);
}

body {
  margin: 0;
  overflow-x: hidden;
  color: var(--text);
  background: var(--paper);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.85;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
br.mobile-break { display: none; }
button, input, textarea, select { font: inherit; }
a { color: inherit; }
strong { color: var(--ink); }
::selection { color: var(--ink); background: rgba(115, 216, 206, .42); }

.skip-link {
  position: fixed;
  z-index: 9999;
  left: 16px;
  top: 12px;
  padding: 10px 14px;
  color: #fff;
  background: var(--ink);
  border-radius: 8px;
  text-decoration: none;
  transform: translateY(-160%);
  transition: transform .2s ease;
}
.skip-link:focus { transform: translateY(0); }

:focus-visible {
  outline: 3px solid rgba(33, 110, 198, .42);
  outline-offset: 3px;
  border-radius: 4px;
}

.reading-progress {
  position: fixed;
  z-index: 1000;
  inset: 0 0 auto;
  height: 3px;
  pointer-events: none;
}
.reading-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--teal), var(--blue));
  box-shadow: 0 0 12px rgba(11, 141, 135, .28);
}

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  height: var(--header-h);
  border-bottom: 1px solid rgba(220, 230, 235, .88);
  background: rgba(255, 255, 255, .9);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  backdrop-filter: blur(16px) saturate(150%);
}
.site-header__inner,
.site-footer__inner {
  width: min(calc(100% - 40px), var(--page));
  height: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  font-size: .76rem;
  font-weight: 900;
  letter-spacing: .11em;
}
.brand__mark {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--ink);
  border-radius: 9px;
  font-size: .72rem;
  letter-spacing: 0;
}
.site-header__meta {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 16px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: .66rem;
  font-weight: 700;
  letter-spacing: .09em;
}
.site-header__meta span { color: var(--teal-strong); }

.article { min-width: 0; }
.shell { width: min(calc(100% - 40px), var(--page)); margin-inline: auto; }
.prose { width: min(calc(100% - 40px), var(--article)); margin-inline: auto; }

.hero {
  position: relative;
  padding: clamp(58px, 7.4vw, 106px) 0 clamp(60px, 7vw, 98px);
  overflow: hidden;
  background:
    radial-gradient(circle at 76% 11%, rgba(115, 216, 206, .17), transparent 28%),
    radial-gradient(circle at 16% 26%, rgba(33, 110, 198, .07), transparent 24%),
    var(--paper);
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .32;
  background-image:
    linear-gradient(rgba(15, 48, 69, .04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 48, 69, .04) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: linear-gradient(to bottom, #000, transparent 90%);
  mask-image: linear-gradient(to bottom, #000, transparent 90%);
}
.hero__grid {
  position: relative;
  z-index: 1;
  width: min(calc(100% - 40px), var(--page));
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(350px, .82fr);
  gap: clamp(48px, 7vw, 104px);
  align-items: center;
}
.breadcrumb {
  margin: 0 0 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--faint);
  font-size: .72rem;
  font-weight: 700;
}
.breadcrumb a { text-underline-offset: 3px; }
.breadcrumb a:hover { color: var(--teal-strong); }
.eyebrow,
.section-kicker,
.figure-kicker {
  margin: 0 0 18px;
  color: var(--teal-strong);
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 900;
  letter-spacing: .13em;
  line-height: 1.4;
}
.hero h1 {
  margin: 0;
  max-width: 760px;
  color: var(--ink);
  font-size: clamp(3.05rem, 5vw, 5.15rem);
  font-weight: 900;
  line-height: 1.01;
  letter-spacing: -.065em;
  text-wrap: balance;
}
.hero__dek {
  max-width: 720px;
  margin: 30px 0 0;
  color: var(--text);
  font-size: clamp(1.03rem, 1.45vw, 1.2rem);
  font-weight: 550;
  line-height: 1.78;
  letter-spacing: -.012em;
}
.hero__dek strong { color: var(--teal-strong); font-weight: 900; }
.hero__meta {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.hero__meta span {
  padding: 6px 10px;
  color: var(--muted);
  background: rgba(255, 255, 255, .84);
  border: 1px solid var(--line);
  border-radius: 999px;
  box-shadow: var(--shadow-xs);
  font-size: .7rem;
  font-weight: 800;
  line-height: 1.2;
}

.hero-answer {
  position: relative;
  padding: clamp(26px, 3vw, 38px);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-l);
  background: rgba(255, 255, 255, .9);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.hero-answer::before {
  content: "";
  position: absolute;
  inset: 28px auto 28px 0;
  width: 4px;
  border-radius: 0 4px 4px 0;
  background: linear-gradient(var(--teal), var(--blue));
}
.hero-answer__label {
  margin: 0 0 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--teal-strong);
  font-family: var(--font-mono);
  font-size: .65rem;
  font-weight: 900;
  letter-spacing: .1em;
}
.hero-answer__label span {
  padding: 5px 9px;
  border: 1px solid rgba(7, 139, 132, .45);
  border-radius: 999px;
  font-family: var(--font-sans);
  font-size: .68rem;
  letter-spacing: 0;
}
.hero-answer__main {
  margin: 0;
  color: var(--text);
  font-size: clamp(1.02rem, 1.4vw, 1.18rem);
  font-weight: 620;
  line-height: 1.75;
}
.hero-answer__main strong { font-weight: 900; }
.hero-answer__facts {
  margin: 25px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}
.hero-answer__facts > div {
  display: grid;
  grid-template-columns: 78px 1fr;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}
.hero-answer__facts > div:last-child { border-bottom: 0; padding-bottom: 0; }
.hero-answer__facts dt {
  color: var(--teal-strong);
  font-size: .7rem;
  font-weight: 900;
}
.hero-answer__facts dd {
  margin: 0;
  color: var(--ink-2);
  font-size: .78rem;
  font-weight: 720;
  line-height: 1.6;
}

.lead-film {
  padding: clamp(28px, 4vw, 54px) 0 clamp(70px, 9vw, 128px);
  background: var(--paper);
}
.boundary-film {
  margin: 0;
  padding: clamp(26px, 4.4vw, 58px);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at 82% 8%, rgba(115, 216, 206, .12), transparent 22%),
    #fff;
  box-shadow: var(--shadow-sm);
}
.boundary-film figcaption {
  max-width: 820px;
  margin-bottom: 34px;
}
.boundary-film h2 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(1.9rem, 3.3vw, 3.3rem);
  line-height: 1.15;
  letter-spacing: -.045em;
}
.boundary-film figcaption > p:last-child {
  max-width: 740px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: .95rem;
}
.film-stage {
  display: grid;
  gap: 9px;
}
.film-lane {
  position: relative;
  min-height: 118px;
  display: grid;
  grid-template-columns: 48px minmax(170px, .75fr) minmax(340px, 1.55fr) minmax(180px, .72fr);
  gap: 22px;
  align-items: center;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: rgba(255, 255, 255, .88);
  transition: border-color .65s var(--ease), background .65s var(--ease), box-shadow .65s var(--ease), transform .65s var(--ease);
}
.film-lane::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  border-radius: var(--radius-m) 0 0 var(--radius-m);
  background: linear-gradient(var(--teal), var(--blue));
  opacity: 0;
  transform: scaleY(.3);
  transition: opacity .5s ease, transform .65s var(--ease);
}
.boundary-film[data-phase="0"] [data-film-lane="0"],
.boundary-film[data-phase="1"] [data-film-lane="1"],
.boundary-film[data-phase="2"] [data-film-lane="2"] {
  z-index: 2;
  border-color: rgba(7, 139, 132, .46);
  background: linear-gradient(90deg, rgba(223, 245, 242, .56), #fff 54%);
  box-shadow: 0 14px 34px rgba(19, 77, 91, .08);
  transform: translateX(5px);
}
.boundary-film[data-phase="0"] [data-film-lane="0"]::after,
.boundary-film[data-phase="1"] [data-film-lane="1"]::after,
.boundary-film[data-phase="2"] [data-film-lane="2"]::after {
  opacity: 1;
  transform: scaleY(1);
}
.film-lane__number {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 900;
  transition: color .5s ease, border-color .5s ease, background .5s ease;
}
.boundary-film[data-phase="0"] [data-film-lane="0"] .film-lane__number,
.boundary-film[data-phase="1"] [data-film-lane="1"] .film-lane__number,
.boundary-film[data-phase="2"] [data-film-lane="2"] .film-lane__number {
  color: #fff;
  border-color: var(--teal);
  background: var(--teal);
}
.film-lane__title strong,
.film-lane__title span { display: block; }
.film-lane__title strong {
  color: var(--ink);
  font-size: .94rem;
  line-height: 1.4;
}
.film-lane__title span {
  margin-top: 4px;
  color: var(--muted);
  font-size: .7rem;
  font-weight: 650;
}
.same-book,
.quote-chain,
.delivery-chain {
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.same-book span {
  min-width: 84px;
  padding: 13px 16px;
  color: var(--ink);
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  background: #fff;
  text-align: center;
  font-size: .78rem;
  font-weight: 900;
}
.same-book i {
  position: relative;
  width: 86px;
  height: 2px;
  background: var(--line-strong);
}
.same-book i::after {
  content: "内部";
  position: absolute;
  left: 50%;
  top: 50%;
  padding: 3px 7px;
  color: var(--muted);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  font: 800 .58rem/1.2 var(--font-sans);
  transform: translate(-50%, -50%);
}
.quote-chain { gap: 7px; }
.quote-node {
  min-width: 94px;
  padding: 10px 12px;
  color: var(--ink);
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  background: #fff;
  text-align: center;
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 900;
}
.quote-node small {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: .56rem;
}
.quote-node--prime {
  color: var(--teal-strong);
  border-color: rgba(7, 139, 132, .4);
  background: var(--paper-mint);
}
.quote-chain i {
  position: relative;
  width: 36px;
  border-top: 2px dashed var(--line-strong);
}
.quote-chain i::after {
  content: "";
  position: absolute;
  right: -1px;
  top: -4px;
  width: 6px;
  height: 6px;
  border-top: 2px solid var(--muted);
  border-right: 2px solid var(--muted);
  transform: rotate(45deg);
}
.delivery-chain { gap: 12px; }
.vault {
  min-width: 76px;
  padding: 9px 10px;
  color: var(--ink);
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  background: #fff;
  text-align: center;
  font-family: var(--font-mono);
  font-size: .8rem;
  font-weight: 900;
}
.vault small {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font: 700 .55rem/1.2 var(--font-sans);
}
.ledger-line {
  position: relative;
  width: min(180px, 42%);
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-top: 2px solid rgba(7, 139, 132, .36);
  border-bottom: 2px solid rgba(33, 110, 198, .24);
}
.ledger-line b {
  color: var(--muted);
  font: 800 .56rem/1 var(--font-mono);
  letter-spacing: .08em;
}
.xrp-token {
  position: absolute;
  z-index: 2;
  left: 0;
  top: 50%;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(135deg, var(--teal), var(--blue));
  border-radius: 50%;
  box-shadow: 0 6px 18px rgba(10, 111, 129, .25);
  font: 900 .68rem/1 var(--font-sans);
  transform: translate(0, -50%);
}
.boundary-film[data-phase="2"] .xrp-token { animation: xrp-cross 2.8s var(--ease) infinite; }
.film-lane__result { margin: 0; }
.film-lane__result b,
.film-lane__result span { display: block; }
.film-lane__result b {
  color: var(--ink);
  font-size: .8rem;
}
.film-lane__result span {
  margin-top: 3px;
  color: var(--muted);
  font-size: .68rem;
  font-weight: 650;
}
.film-conditions {
  margin-top: 22px;
  display: grid;
  grid-template-columns: repeat(3, 1fr) auto;
  align-items: center;
  gap: 8px;
}
.film-conditions span {
  min-height: 54px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  color: var(--ink-2);
  background: var(--paper-soft);
  border: 1px solid var(--line);
  border-radius: 14px;
  font-size: .76rem;
  font-weight: 800;
}
.film-conditions b {
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  color: #fff;
  background: var(--ink);
  border-radius: 50%;
  font: 900 .62rem/1 var(--font-mono);
}
.film-conditions em {
  padding-left: 12px;
  color: var(--teal-strong);
  font-size: .75rem;
  font-style: normal;
  font-weight: 900;
  white-space: nowrap;
}
.film-timeline {
  margin-top: 14px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
}
.film-timeline i {
  height: 3px;
  background: var(--line);
  border-radius: 99px;
  overflow: hidden;
}
.film-timeline i::after {
  content: "";
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--teal), var(--blue));
  transform: scaleX(0);
  transform-origin: left;
}
.boundary-film[data-phase="0"] .film-timeline i:nth-child(1)::after,
.boundary-film[data-phase="1"] .film-timeline i:nth-child(2)::after,
.boundary-film[data-phase="2"] .film-timeline i:nth-child(3)::after {
  animation: film-progress 3.8s linear forwards;
}

.article-nav-wrap {
  position: sticky;
  z-index: 80;
  top: var(--header-h);
  border-block: 1px solid rgba(220, 230, 235, .9);
  background: rgba(255, 255, 255, .92);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}
.article-nav {
  width: min(calc(100% - 40px), var(--page));
  margin: 0 auto;
  display: flex;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
}
.article-nav::-webkit-scrollbar { display: none; }
.article-nav a {
  position: relative;
  flex: 0 0 auto;
  padding: 14px 12px 13px;
  color: var(--muted);
  text-decoration: none;
  font-size: .7rem;
  font-weight: 800;
  white-space: nowrap;
}
.article-nav a::after {
  content: "";
  position: absolute;
  inset: auto 10px 0;
  height: 2px;
  background: var(--teal);
  transform: scaleX(0);
  transition: transform .25s ease;
}
.article-nav a:hover,
.article-nav a.is-current { color: var(--ink); }
.article-nav a.is-current::after { transform: scaleX(1); }

.chapter {
  padding: clamp(88px, 10vw, 150px) 0;
  scroll-margin-top: calc(var(--header-h) + 52px);
}
.chapter--plain { background: var(--paper); }
.chapter--mist {
  border-block: 1px solid rgba(220, 230, 235, .66);
  background:
    linear-gradient(180deg, rgba(243, 248, 252, .82), rgba(246, 249, 250, .72));
}
.chapter h2 {
  margin: 0 0 36px;
  color: var(--ink);
  font-size: clamp(2.15rem, 4.3vw, 4.2rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -.055em;
  text-wrap: balance;
}
.chapter .prose > p:not(.section-kicker):not(.opening-line) {
  margin: 0 0 1.45em;
  font-size: 1.02rem;
}
.chapter .opening-line {
  margin: 0 0 1.35em;
  color: var(--ink);
  font-size: clamp(1.23rem, 2vw, 1.55rem);
  font-weight: 820;
  line-height: 1.7;
  letter-spacing: -.015em;
}
.cite {
  display: inline-flex;
  min-width: 1.45em;
  height: 1.45em;
  margin-left: .14em;
  align-items: center;
  justify-content: center;
  color: var(--teal-strong);
  border: 1px solid rgba(7, 139, 132, .34);
  border-radius: 50%;
  text-decoration: none;
  vertical-align: .22em;
  font: 900 .58rem/1 var(--font-mono);
}
.cite:hover { color: #fff; background: var(--teal); }

.plain-answer,
.regulatory-note,
.role-boundary {
  position: relative;
  margin: 42px 0 0;
  padding: 28px 30px 26px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-m);
  background: #fff;
  box-shadow: var(--shadow-xs);
}
.plain-answer::before,
.regulatory-note::before,
.role-boundary::before {
  content: "";
  position: absolute;
  inset: 18px auto 18px 0;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: linear-gradient(var(--teal), var(--blue));
}
.plain-answer > span,
.regulatory-note > span {
  display: block;
  margin-bottom: 10px;
  color: var(--teal-strong);
  font-size: .68rem;
  font-weight: 900;
}
.plain-answer p,
.regulatory-note p,
.role-boundary p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.9;
}
.role-boundary strong {
  display: block;
  margin-bottom: 10px;
  font-size: .9rem;
}

.wide-figure {
  width: min(calc(100% - 40px), var(--page));
  margin: clamp(54px, 7vw, 88px) auto 0;
}
.wide-figure figure { margin: 0; }
.wide-figure figcaption { margin-bottom: 30px; }
.wide-figure h3 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(1.55rem, 3vw, 2.55rem);
  line-height: 1.18;
  letter-spacing: -.04em;
}
.figure-note {
  margin: 22px 0 0;
  color: var(--muted);
  font-size: .72rem;
  font-weight: 650;
}

.cost-equation,
.engine-compare,
.advantage-machine,
.route-strip {
  padding: clamp(26px, 4.2vw, 54px);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-l);
  background: #fff;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.equation-main {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto .9fr;
  gap: 18px;
  align-items: stretch;
}
.equation-side,
.equation-delta {
  min-width: 0;
  min-height: 146px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: var(--paper-soft);
}
.equation-side--xrp {
  border-color: rgba(7, 139, 132, .35);
  background: var(--paper-mint);
}
.equation-delta {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(145deg, var(--ink), #18384c);
}
.equation-side span,
.equation-delta span {
  color: var(--muted);
  font-size: .7rem;
  font-weight: 900;
}
.equation-delta span { color: rgba(255,255,255,.66); }
.equation-side strong,
.equation-delta strong {
  margin: 7px 0 4px;
  color: var(--ink);
  font: 900 clamp(2rem, 3vw, 3rem)/1 var(--font-mono);
  letter-spacing: -.05em;
}
.equation-delta strong { color: #fff; }
.equation-side small,
.equation-delta small {
  color: var(--muted);
  font-size: .68rem;
  font-weight: 700;
}
.equation-delta small { color: rgba(255,255,255,.68); }
.equation-sign {
  display: grid;
  place-items: center;
  color: var(--faint);
  font: 500 1.8rem/1 var(--font-mono);
}
.cost-stack {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 7px;
}
.cost-stack span {
  min-height: 50px;
  display: grid;
  place-items: center;
  padding: 9px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 11px;
  background: #fff;
  text-align: center;
  font-size: .66rem;
  font-weight: 800;
  opacity: .48;
  transform: translateY(8px);
}
.cost-equation.is-running .cost-stack span {
  animation: cost-arrive .5s var(--ease) forwards;
  animation-delay: calc(var(--i) * .1s);
}

.engine-lanes {
  display: grid;
  grid-template-columns: 1fr 54px 1fr;
  gap: 18px;
  align-items: stretch;
}
.engine-lane {
  min-width: 0;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: var(--paper-soft);
}
.engine-lane--ledger {
  border-color: rgba(7, 139, 132, .28);
  background: var(--paper-mint);
}
.engine-lane--offledger {
  border-color: rgba(33, 110, 198, .24);
  background: var(--paper-blue);
}
.engine-label strong,
.engine-label span { display: block; }
.engine-label strong {
  color: var(--ink);
  font-size: .93rem;
}
.engine-label span {
  color: var(--muted);
  font-size: .7rem;
  font-weight: 700;
}
.engine-flow {
  margin: 34px 0 26px;
  display: grid;
  grid-template-columns: 1fr 44px 56px 44px 1fr;
  align-items: center;
}
.engine-flow span,
.engine-flow b {
  min-height: 54px;
  display: grid;
  place-items: center;
  color: var(--ink);
  border: 1px solid var(--line-strong);
  border-radius: 11px;
  background: #fff;
  text-align: center;
  font-family: var(--font-mono);
  font-size: .65rem;
}
.engine-flow b {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(135deg, var(--teal), var(--blue));
  border-radius: 50%;
  font-weight: 900;
}
.engine-flow i {
  position: relative;
  height: 2px;
  background: var(--line-strong);
  overflow: visible;
}
.engine-flow i::after {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 7px;
  height: 7px;
  background: var(--teal);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(7, 139, 132, .12);
  opacity: 0;
  transform: translate(0, -50%);
}
.engine-compare.is-running .engine-flow i::after {
  animation: engine-dot 2.8s ease-in-out infinite;
}
.engine-compare.is-running .engine-lane--offledger .engine-flow i::after {
  animation-delay: 1.4s;
  background: var(--blue);
  box-shadow: 0 0 0 4px rgba(33, 110, 198, .12);
}
.engine-lane p {
  margin: 0;
  color: var(--muted);
  font-size: .76rem;
  font-weight: 700;
}
.engine-lane p em {
  color: var(--ink);
  font-style: normal;
  font-weight: 900;
}
.engine-divider {
  display: grid;
  place-items: center;
}
.engine-divider span {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  color: var(--ink);
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: #fff;
  box-shadow: var(--shadow-xs);
  font: 800 1rem/1 var(--font-mono);
}

.condition-list {
  width: min(calc(100% - 40px), var(--page));
  margin: 66px auto 0;
  border-top: 1px solid var(--line-strong);
}
.condition-row {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr) minmax(240px, .42fr);
  gap: clamp(26px, 4vw, 58px);
  padding: clamp(42px, 6vw, 76px) 0;
  border-bottom: 1px solid var(--line-strong);
}
.condition-row__number {
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--ink);
  border-radius: 17px;
  font: 900 1rem/1 var(--font-mono);
}
.condition-row__label {
  margin: 0 0 10px;
  color: var(--teal-strong);
  font: 900 .66rem/1.3 var(--font-mono);
  letter-spacing: .12em;
}
.condition-row h3 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(1.5rem, 2.8vw, 2.5rem);
  line-height: 1.25;
  letter-spacing: -.04em;
}
.condition-row__plain {
  margin: 22px 0 18px;
  color: var(--ink-2);
  font-size: 1.03rem;
  font-weight: 820;
}
.condition-row__copy > p:not(.condition-row__label):not(.condition-row__plain) {
  margin: 0 0 1.2em;
  font-size: .96rem;
}
.condition-row__status {
  align-self: start;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: var(--paper-soft);
}
.condition-row__status p {
  margin: 8px 0 17px;
  color: var(--muted);
  font-size: .72rem;
  font-weight: 700;
  line-height: 1.7;
}
.condition-row__status p:last-child { margin-bottom: 0; }
.status {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 4px 8px;
  border: 1px solid;
  border-radius: 999px;
  font-size: .62rem;
  font-weight: 900;
  line-height: 1.2;
}
.status--fact { color: var(--teal-strong); border-color: rgba(7,139,132,.32); background: var(--teal-soft); }
.status--inference { color: var(--blue); border-color: rgba(33,110,198,.28); background: var(--blue-soft); }
.status--hypothesis { color: var(--violet); border-color: rgba(114,89,178,.28); background: var(--violet-soft); }
.status--unknown { color: var(--amber); border-color: rgba(169,109,18,.3); background: var(--amber-soft); }

.advantage-machine__grid {
  display: grid;
  grid-template-columns: 1fr 170px 1fr;
  gap: 32px;
  align-items: center;
}
.saving-side,
.expense-side {
  display: grid;
  gap: 9px;
}
.saving-side p,
.expense-side p {
  margin: 0 0 4px;
  color: var(--muted);
  font-size: .7rem;
  font-weight: 900;
}
.saving-side span,
.expense-side span {
  min-height: 58px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 16px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: var(--paper-soft);
  color: var(--ink-2);
  font-size: .78rem;
  font-weight: 820;
  opacity: .55;
  transform: translateX(-8px);
}
.expense-side span { transform: translateX(8px); }
.saving-side span b {
  color: var(--teal);
  font: 900 1rem/1 var(--font-mono);
}
.saving-side span small {
  color: var(--muted);
  font-size: .6rem;
  font-weight: 750;
}
.expense-side span b {
  color: var(--coral);
  font: 900 1rem/1 var(--font-mono);
}
.advantage-machine.is-running .saving-side span,
.advantage-machine.is-running .expense-side span {
  animation: machine-in .52s var(--ease) forwards;
  animation-delay: calc(var(--i) * .15s);
}
.balance-core {
  position: relative;
  width: 164px;
  height: 164px;
  display: grid;
  place-items: center;
  align-content: center;
  border: 1px solid rgba(7, 139, 132, .34);
  border-radius: 50%;
  background: radial-gradient(circle, #fff 48%, var(--paper-mint));
}
.balance-core::before,
.balance-core::after {
  content: "";
  position: absolute;
  inset: 13px;
  border: 1px dashed rgba(7,139,132,.28);
  border-radius: 50%;
}
.balance-core::after {
  inset: -8px;
  border-color: rgba(33,110,198,.16);
}
.balance-core i {
  position: absolute;
  inset: -8px;
  border: 3px solid transparent;
  border-top-color: var(--teal);
  border-right-color: var(--blue);
  border-radius: 50%;
}
.advantage-machine.is-running .balance-core i { animation: orbit 8s linear infinite; }
.balance-core strong {
  color: var(--ink);
  font-size: 2.35rem;
  font-weight: 950;
  letter-spacing: -.08em;
}
.balance-core span {
  margin-top: 4px;
  color: var(--muted);
  font: 900 .58rem/1 var(--font-mono);
  letter-spacing: .1em;
}
.machine-verdict {
  margin: 32px 0 0;
  padding-top: 22px;
  display: grid;
  grid-template-columns: auto 1fr auto 1fr;
  gap: 10px 16px;
  align-items: center;
  border-top: 1px solid var(--line);
}
.machine-verdict span {
  padding: 5px 9px;
  color: var(--muted);
  background: var(--paper-soft);
  border-radius: 999px;
  font-size: .65rem;
  font-weight: 900;
}
.machine-verdict strong { font-size: .8rem; }

.route-strip__rows { display: grid; gap: 10px; }
.route-row {
  position: relative;
  min-height: 106px;
  display: grid;
  grid-template-columns: minmax(250px, 1fr) minmax(120px, 1.15fr) minmax(160px, .65fr);
  gap: 24px;
  align-items: center;
  padding: 18px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: var(--paper-soft);
  overflow: hidden;
  transition: border-color .6s ease, background .6s ease, box-shadow .6s ease;
}
.route-row::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(var(--teal), var(--blue));
  opacity: 0;
  transition: opacity .5s ease;
}
.route-strip[data-phase="0"] [data-route="0"],
.route-strip[data-phase="1"] [data-route="1"],
.route-strip[data-phase="2"] [data-route="2"] {
  border-color: rgba(7,139,132,.42);
  background: #fff;
  box-shadow: var(--shadow-xs);
}
.route-strip[data-phase="0"] [data-route="0"]::before,
.route-strip[data-phase="1"] [data-route="1"]::before,
.route-strip[data-phase="2"] [data-route="2"]::before { opacity: 1; }
.route-row > div span,
.route-row > div small { display: block; }
.route-row > div span {
  color: var(--ink);
  font-size: .88rem;
  font-weight: 900;
}
.route-row > div small {
  color: var(--muted);
  font-size: .68rem;
  font-weight: 700;
}
.route-row i {
  position: relative;
  height: 2px;
  background: var(--line-strong);
}
.route-row i::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  width: 9px;
  height: 9px;
  background: var(--teal);
  border-radius: 50%;
  box-shadow: 0 0 0 5px rgba(7,139,132,.12);
  opacity: 0;
  transform: translate(0, -50%);
}
.route-strip[data-phase="0"] [data-route="0"] i::after,
.route-strip[data-phase="1"] [data-route="1"] i::after,
.route-strip[data-phase="2"] [data-route="2"] i::after {
  animation: route-dot 3.7s var(--ease) infinite;
}
.route-row > strong {
  color: var(--ink);
  text-align: right;
  font-size: 1.02rem;
}
.route-row > strong em {
  display: inline-block;
  margin-left: 4px;
  padding: 3px 6px;
  color: var(--teal-strong);
  background: var(--teal-soft);
  border-radius: 999px;
  font-size: .58rem;
  font-style: normal;
  vertical-align: .2em;
}

.evidence-rail {
  position: relative;
  width: min(calc(100% - 40px), var(--page));
  margin: 62px auto 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-l);
  background: #fff;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.evidence-rail section {
  position: relative;
  z-index: 1;
  min-width: 0;
  padding: 28px 25px 30px;
  border-right: 1px solid var(--line);
}
.evidence-rail section:last-of-type { border-right: 0; }
.evidence-rail__head {
  min-height: 88px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}
.evidence-rail__head strong {
  display: block;
  margin-top: 10px;
  font-size: .84rem;
  line-height: 1.55;
}
.evidence-rail ul {
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
  list-style: none;
}
.evidence-rail li {
  position: relative;
  padding-left: 15px;
  color: var(--text);
  font-size: .74rem;
  font-weight: 650;
  line-height: 1.75;
}
.evidence-rail li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .7em;
  width: 5px;
  height: 5px;
  background: var(--line-strong);
  border-radius: 50%;
}
.evidence-rail__cursor {
  position: absolute;
  z-index: 0;
  left: 0;
  top: 0;
  width: 25%;
  height: 100%;
  background: linear-gradient(180deg, rgba(223,245,242,.58), rgba(242,247,251,.15));
  border-bottom: 3px solid var(--teal);
  pointer-events: none;
}
.evidence-rail.is-running .evidence-rail__cursor {
  animation: evidence-scan 12s var(--ease) infinite;
}

.chapter--answer {
  position: relative;
  color: var(--text);
  background:
    radial-gradient(circle at 80% 15%, rgba(115,216,206,.15), transparent 28%),
    linear-gradient(180deg, #fff, var(--paper-mint));
  overflow: hidden;
}
.chapter--answer::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(15,48,69,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15,48,69,.035) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: linear-gradient(transparent, #000 30%, #000 70%, transparent);
  mask-image: linear-gradient(transparent, #000 30%, #000 70%, transparent);
}
.answer-block {
  position: relative;
  z-index: 1;
  width: min(calc(100% - 40px), 960px);
  margin: 0 auto;
}
.answer-block h2 { max-width: 820px; }
.answer-block__lead {
  margin: 0 0 20px;
  color: var(--ink);
  font-size: clamp(1.35rem, 2.5vw, 2rem);
  font-weight: 900;
  line-height: 1.55;
}
.answer-block__main {
  margin: 0;
  max-width: 900px;
  color: var(--text);
  font-size: clamp(1.12rem, 2vw, 1.42rem);
  line-height: 1.9;
}
.answer-block__main strong { color: var(--teal-strong); }
.answer-block__stop {
  margin: 34px 0 0;
  padding-left: 22px;
  border-left: 3px solid var(--ink);
  color: var(--ink);
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  font-weight: 850;
  line-height: 1.75;
}
.falsify {
  margin-top: 58px;
  padding: clamp(26px, 4vw, 42px);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-l);
  background: rgba(255,255,255,.88);
  box-shadow: var(--shadow-sm);
}
.falsify h3 {
  margin: 0 0 26px;
  color: var(--ink);
  font-size: clamp(1.25rem, 2vw, 1.6rem);
}
.falsify ol {
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  list-style: none;
}
.falsify li {
  min-width: 0;
  display: grid;
  grid-template-columns: 38px 1fr;
  gap: 12px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
}
.falsify li > span {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--ink);
  border-radius: 11px;
  font: 900 .62rem/1 var(--font-mono);
}
.falsify p { margin: 0; font-size: .75rem; line-height: 1.7; }
.falsify p strong { display: block; font-size: .82rem; }

.chapter--related {
  border-block: 1px solid var(--line);
  background: var(--paper-soft);
}
.chapter--related h2 {
  max-width: 760px;
  margin-bottom: 46px;
}
.related-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line-strong);
}
.related-links a {
  position: relative;
  min-height: 190px;
  padding: 28px 56px 28px 24px;
  border-right: 1px solid var(--line-strong);
  color: var(--ink);
  text-decoration: none;
  transition: background .25s ease;
}
.related-links a:last-child { border-right: 0; }
.related-links a:hover { background: #fff; }
.related-links span {
  display: block;
  margin-bottom: 14px;
  color: var(--teal-strong);
  font-size: .66rem;
  font-weight: 900;
}
.related-links strong {
  display: block;
  font-size: 1.05rem;
  line-height: 1.65;
}
.related-links em {
  position: absolute;
  right: 22px;
  bottom: 24px;
  color: var(--teal);
  font-size: 1.3rem;
  font-style: normal;
}

.chapter--faq { padding-bottom: 100px; }
.faq-list {
  border-top: 1px solid var(--line-strong);
}
.faq-list details { border-bottom: 1px solid var(--line-strong); }
.faq-list summary {
  position: relative;
  padding: 23px 48px 23px 0;
  color: var(--ink);
  cursor: pointer;
  font-weight: 850;
  line-height: 1.65;
  list-style: none;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::before,
.faq-list summary::after {
  content: "";
  position: absolute;
  right: 9px;
  top: 50%;
  width: 16px;
  height: 2px;
  background: var(--teal);
  transform: translateY(-50%);
  transition: transform .25s ease;
}
.faq-list summary::after { transform: translateY(-50%) rotate(90deg); }
.faq-list details[open] summary::after { transform: translateY(-50%) rotate(0); }
.faq-list details p {
  margin: -2px 0 24px;
  padding-right: 40px;
  color: var(--text);
  font-size: .92rem;
}

.sources {
  padding: 88px 0 108px;
  border-top: 1px solid var(--line);
  background: #fff;
}
.sources h2 {
  margin: 0 0 34px;
  color: var(--ink);
  font-size: clamp(1.8rem, 3vw, 2.7rem);
  letter-spacing: -.04em;
}
.source-list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: source;
}
.source-list li {
  position: relative;
  padding: 16px 0 16px 42px;
  border-top: 1px solid var(--line);
  counter-increment: source;
}
.source-list li::before {
  content: counter(source, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 18px;
  color: var(--teal-strong);
  font: 900 .64rem/1.4 var(--font-mono);
}
.source-list a {
  display: block;
  color: var(--ink);
  font-size: .78rem;
  font-weight: 850;
  text-underline-offset: 3px;
}
.source-list span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: .68rem;
  line-height: 1.65;
}
.source-list li.source-flash {
  background: linear-gradient(90deg, var(--teal-soft), transparent);
}
.source-note {
  margin: 24px 0 0;
  color: var(--muted);
  font-size: .7rem;
}

.site-footer {
  min-height: 120px;
  color: rgba(255,255,255,.66);
  background: var(--ink);
}
.site-footer__inner { min-height: 120px; height: auto; }
.site-footer .brand { color: #fff; }
.site-footer .brand__mark { color: var(--ink); background: #fff; }
.site-footer p {
  max-width: 600px;
  margin: 0;
  text-align: center;
  font-size: .68rem;
}
.site-footer > .site-footer__inner > a:last-child {
  color: #fff;
  font-size: .7rem;
  font-weight: 800;
  text-decoration: none;
}

.reveal {
  opacity: 1;
  transform: none;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes xrp-cross {
  0% { left: 0; transform: translate(0, -50%) scale(.9); }
  45%, 55% { transform: translate(-50%, -50%) scale(1.08); }
  50% { left: 50%; }
  100% { left: 100%; transform: translate(-100%, -50%) scale(.9); }
}
@keyframes film-progress {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}
@keyframes cost-arrive {
  to { opacity: 1; transform: translateY(0); }
}
@keyframes engine-dot {
  0%, 12% { left: 0; opacity: 0; transform: translate(0, -50%); }
  25% { opacity: 1; }
  78% { opacity: 1; }
  92%, 100% { left: 100%; opacity: 0; transform: translate(-100%, -50%); }
}
@keyframes machine-in {
  to { opacity: 1; transform: translateX(0); }
}
@keyframes orbit { to { transform: rotate(360deg); } }
@keyframes route-dot {
  0% { left: 0; opacity: 0; transform: translate(0,-50%); }
  15% { opacity: 1; }
  82% { opacity: 1; }
  100% { left: 100%; opacity: 0; transform: translate(-100%,-50%); }
}
@keyframes evidence-scan {
  0%, 19% { transform: translateX(0); }
  25%, 44% { transform: translateX(100%); }
  50%, 69% { transform: translateX(200%); }
  75%, 94% { transform: translateX(300%); }
  100% { transform: translateX(0); }
}

@media (max-width: 1060px) {
  .hero__grid {
    grid-template-columns: minmax(0, 1fr) minmax(320px, .8fr);
    gap: 44px;
  }
  .hero h1 { font-size: clamp(2.85rem, 5.3vw, 4.1rem); }
  .film-lane {
    grid-template-columns: 42px minmax(150px, .65fr) minmax(290px, 1.35fr);
  }
  .film-lane__result {
    grid-column: 2 / -1;
    padding-top: 2px;
  }
  .film-lane__result b,
  .film-lane__result span { display: inline; margin-right: 10px; }
  .condition-row {
    grid-template-columns: 62px minmax(0, 1fr);
  }
  .condition-row__status {
    grid-column: 2;
    display: grid;
    grid-template-columns: auto 1fr auto 1fr;
    gap: 8px 12px;
    align-items: center;
  }
  .condition-row__status p { margin: 0; }
  .evidence-rail { grid-template-columns: repeat(2, 1fr); }
  .evidence-rail section:nth-of-type(2) { border-right: 0; }
  .evidence-rail section:nth-of-type(-n+2) { border-bottom: 1px solid var(--line); }
  .evidence-rail__cursor { display: none; }
}

@media (max-width: 820px) {
  :root { --header-h: 62px; }
  .site-header__inner,
  .site-footer__inner,
  .shell,
  .wide-figure,
  .condition-list,
  .evidence-rail,
  .article-nav,
  .answer-block { width: min(calc(100% - 28px), var(--page)); }
  .prose { width: min(calc(100% - 32px), var(--article)); }
  .site-header__meta span { display: none; }

  .hero { padding: 48px 0 54px; }
  .hero__grid {
    width: min(calc(100% - 28px), var(--page));
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .breadcrumb { margin-bottom: 22px; }
  .hero h1 {
    max-width: 680px;
    font-size: clamp(2.7rem, 9.3vw, 4.6rem);
  }
  .hero__dek { max-width: 680px; }
  .hero-answer { padding: 27px 25px; }
  .hero-answer__facts {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0 18px;
  }
  .hero-answer__facts > div {
    display: block;
    padding: 12px 0;
  }
  .hero-answer__facts dt { margin-bottom: 3px; }

  .boundary-film { padding: 28px 22px; border-radius: 26px; }
  .film-lane {
    min-height: 0;
    grid-template-columns: 38px 1fr;
    gap: 12px 14px;
    padding: 17px;
  }
  .film-lane__number { width: 34px; height: 34px; }
  .same-book,
  .quote-chain,
  .delivery-chain {
    grid-column: 1 / -1;
    min-height: 62px;
  }
  .film-lane__result {
    grid-column: 1 / -1;
    padding-top: 0;
  }
  .film-lane__result b,
  .film-lane__result span { display: block; margin: 0; }
  .film-conditions { grid-template-columns: repeat(3, 1fr); }
  .film-conditions span {
    min-height: 74px;
    align-items: flex-start;
    flex-direction: column;
    gap: 7px;
  }
  .film-conditions em {
    grid-column: 1 / -1;
    padding: 8px 0 0;
    text-align: center;
  }

  .article-nav a { padding-inline: 10px; }
  .chapter { padding-block: 88px; }
  .chapter h2 { font-size: clamp(2.2rem, 8.7vw, 3.5rem); }

  .equation-main {
    grid-template-columns: 1fr 32px 1fr;
  }
  .equation-sign--equals { display: none; }
  .equation-delta {
    grid-column: 1 / -1;
    min-height: 120px;
  }
  .cost-stack { grid-template-columns: repeat(3, 1fr); }

  .engine-lanes {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .engine-divider { min-height: 38px; }
  .engine-divider span { width: 38px; height: 38px; }

  .advantage-machine__grid {
    grid-template-columns: 1fr 138px 1fr;
    gap: 18px;
  }
  .balance-core { width: 132px; height: 132px; }
  .balance-core strong { font-size: 1.9rem; }

  .route-row {
    grid-template-columns: 1fr 100px;
    gap: 16px;
  }
  .route-row i {
    grid-column: 1 / -1;
    grid-row: 2;
  }
  .route-row > strong {
    grid-column: 2;
    grid-row: 1;
  }

  .related-links { grid-template-columns: 1fr; }
  .related-links a {
    min-height: 126px;
    border-right: 0;
    border-bottom: 1px solid var(--line-strong);
  }
  .related-links a:last-child { border-bottom: 0; }

  .site-footer__inner {
    padding: 30px 0;
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 620px) {
  body { font-size: 15px; }
  .desktop-break { display: none; }
  br.mobile-break { display: initial; }
  .site-header__inner { gap: 12px; }
  .site-header__meta { gap: 8px; font-size: .6rem; }
  .brand { font-size: .7rem; }
  .brand__mark { width: 29px; height: 29px; }

  .hero {
    padding: 32px 0 40px;
    background:
      radial-gradient(circle at 78% 7%, rgba(115,216,206,.17), transparent 31%),
      #fff;
  }
  .hero::before { background-size: 48px 48px; }
  .hero__grid { gap: 25px; }
  .breadcrumb { display: none; }
  .eyebrow { margin-bottom: 13px; font-size: .59rem; }
  .hero h1 {
    font-size: clamp(2.38rem, 11.2vw, 3.2rem);
    line-height: 1.06;
    letter-spacing: -.06em;
  }
  .hero__dek {
    margin-top: 20px;
    font-size: .96rem;
    line-height: 1.72;
  }
  .hero__meta { margin-top: 18px; }
  .hero__meta span { font-size: .62rem; }
  .hero-answer {
    padding: 22px 20px 20px;
    border-radius: 22px;
    box-shadow: 0 12px 34px rgba(18,56,77,.08);
  }
  .hero-answer::before { inset-block: 22px; }
  .hero-answer__label { margin-bottom: 14px; font-size: .56rem; }
  .hero-answer__main { font-size: .93rem; line-height: 1.68; }
  .hero-answer__facts { margin-top: 16px; gap: 0 12px; }
  .hero-answer__facts > div { padding: 9px 0; }
  .hero-answer__facts dt { font-size: .61rem; }
  .hero-answer__facts dd { font-size: .68rem; line-height: 1.5; }

  .lead-film { padding: 16px 0 76px; }
  .boundary-film { padding: 24px 15px 20px; border-radius: 22px; }
  .boundary-film figcaption { margin-bottom: 22px; }
  .boundary-film h2 { font-size: 1.85rem; line-height: 1.2; }
  .boundary-film figcaption > p:last-child { font-size: .76rem; line-height: 1.7; }
  .film-lane { padding: 14px; border-radius: 15px; }
  .film-lane__title strong { font-size: .82rem; }
  .film-lane__title span { font-size: .61rem; }
  .same-book span { min-width: 74px; padding: 10px 12px; font-size: .68rem; }
  .same-book i { width: 68px; }
  .quote-chain { gap: 4px; }
  .quote-node { min-width: 0; flex: 1 1 0; padding: 9px 5px; font-size: .58rem; }
  .quote-chain i { width: 20px; flex: 0 0 20px; }
  .vault { min-width: 65px; }
  .ledger-line { width: 42%; }
  .film-lane__result b { font-size: .7rem; }
  .film-lane__result span { font-size: .61rem; }
  .film-conditions { gap: 5px; }
  .film-conditions span {
    min-height: 78px;
    padding: 10px 8px;
    font-size: .61rem;
    line-height: 1.45;
  }
  .film-conditions b { width: 21px; height: 21px; font-size: .56rem; }
  .film-conditions em { font-size: .65rem; }

  .article-nav { width: calc(100% - 16px); }
  .article-nav a { padding: 12px 9px 11px; font-size: .64rem; }

  .chapter { padding-block: 76px; }
  .chapter h2 { margin-bottom: 27px; }
  .chapter .opening-line { font-size: 1.12rem; line-height: 1.72; }
  .chapter .prose > p:not(.section-kicker):not(.opening-line) { font-size: .94rem; }
  .section-kicker,
  .figure-kicker { font-size: .6rem; }
  .plain-answer,
  .regulatory-note,
  .role-boundary { padding: 23px 20px; }
  .plain-answer p,
  .regulatory-note p,
  .role-boundary p { font-size: .82rem; }

  .wide-figure { margin-top: 46px; }
  .cost-equation,
  .engine-compare,
  .advantage-machine,
  .route-strip {
    padding: 23px 15px;
    border-radius: 21px;
  }
  .wide-figure figcaption { margin-bottom: 22px; }
  .wide-figure h3 { font-size: 1.42rem; }
  .equation-main {
    grid-template-columns: 1fr 22px 1fr;
    gap: 7px;
  }
  .equation-side,
  .equation-delta {
    min-height: 116px;
    padding: 14px 10px;
    border-radius: 13px;
  }
  .equation-side span,
  .equation-delta span { font-size: .58rem; }
  .equation-side strong,
  .equation-delta strong { font-size: 1.55rem; }
  .equation-side small,
  .equation-delta small { font-size: .55rem; line-height: 1.4; }
  .equation-sign { font-size: 1.15rem; }
  .cost-stack { gap: 5px; }
  .cost-stack span { min-height: 44px; padding: 6px 4px; font-size: .57rem; }

  .engine-lane { padding: 20px 13px; }
  .engine-flow {
    margin: 24px 0 18px;
    grid-template-columns: 1fr 25px 48px 25px 1fr;
  }
  .engine-flow span,
  .engine-flow b { min-height: 48px; font-size: .57rem; }

  .condition-list { margin-top: 46px; }
  .condition-row {
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 18px 12px;
    padding: 45px 0;
  }
  .condition-row__number { width: 40px; height: 40px; border-radius: 13px; font-size: .78rem; }
  .condition-row h3 { font-size: 1.45rem; }
  .condition-row__plain { font-size: .94rem; }
  .condition-row__copy > p:not(.condition-row__label):not(.condition-row__plain) { font-size: .88rem; }
  .condition-row__status {
    grid-column: 1 / -1;
    grid-template-columns: auto 1fr;
    padding: 17px;
  }
  .condition-row__status p { font-size: .65rem; }

  .advantage-machine__grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .balance-core {
    grid-row: 2;
    width: 122px;
    height: 122px;
    margin: 0 auto;
  }
  .saving-side { grid-row: 1; }
  .expense-side { grid-row: 3; }
  .saving-side,
  .expense-side { gap: 6px; }
  .saving-side p,
  .expense-side p { margin-bottom: 0; }
  .saving-side span,
  .expense-side span { min-height: 45px; padding: 10px 13px; font-size: .7rem; }
  .machine-verdict {
    grid-template-columns: auto 1fr;
    gap: 8px 10px;
  }
  .machine-verdict strong { font-size: .7rem; }

  .route-row {
    min-height: 118px;
    grid-template-columns: 1fr;
    gap: 11px;
    padding: 16px;
  }
  .route-row i,
  .route-row > strong {
    grid-column: 1;
    grid-row: auto;
  }
  .route-row > strong { text-align: left; }

  .evidence-rail {
    grid-template-columns: 1fr;
    border-radius: 20px;
  }
  .evidence-rail section,
  .evidence-rail section:nth-of-type(2) {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
  .evidence-rail section:last-of-type { border-bottom: 0; }
  .evidence-rail__head { min-height: 0; }

  .answer-block__main { font-size: 1.02rem; line-height: 1.85; }
  .falsify { margin-top: 44px; padding: 22px 15px; }
  .falsify ol { grid-template-columns: 1fr; }

  .related-links a { padding-left: 18px; }
  .faq-list summary { font-size: .9rem; }
  .faq-list details p { padding-right: 0; font-size: .84rem; }

  .sources { padding-block: 74px; }
  .site-footer { min-height: 180px; }
}

@media (max-width: 360px) {
  .site-header__meta { display: none; }
  .hero { padding: 22px 0 28px; }
  .hero__grid { gap: 16px; }
  .eyebrow { margin-bottom: 10px; font-size: .54rem; }
  .hero h1 { font-size: 2.16rem; line-height: 1.01; }
  .hero__dek { margin-top: 14px; font-size: .86rem; line-height: 1.58; }
  .hero__meta { display: none; }
  .hero-answer { padding: 17px 16px 15px; border-radius: 19px; }
  .hero-answer::before { inset-block: 17px; }
  .hero-answer__label { margin-bottom: 10px; }
  .hero-answer__main { font-size: .82rem; line-height: 1.56; }
  .hero-answer__facts { margin-top: 11px; gap: 0 10px; }
  .hero-answer__facts > div { padding: 7px 0; }
  .hero-answer__facts dt { font-size: .56rem; }
  .hero-answer__facts dd { font-size: .6rem; line-height: 1.42; }
  .film-conditions { grid-template-columns: 1fr; }
  .film-conditions span {
    min-height: 0;
    flex-direction: row;
    align-items: center;
  }
  .film-conditions em { grid-column: 1; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: .001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .xrp-token { left: 50%; transform: translate(-50%,-50%); }
  .cost-stack span,
  .saving-side span,
  .expense-side span { opacity: 1; transform: none; }
  .evidence-rail__cursor { display: none; }
}

/* =========================================================
   CLARITY EDITION
   The article's central answer is expressed as one cost
   crossover, followed by actor, inventory, and decision maps.
   ========================================================= */

.article--clarity {
  --clarity-green: #078b84;
  --clarity-green-dark: #056d68;
  --clarity-blue: #216ec6;
  --clarity-red: #b9514b;
  --clarity-navy: #0b1b2a;
}

.word-keep {
  white-space: nowrap;
}

.article--clarity .clarity-hero {
  padding-top: clamp(52px, 6vw, 82px);
  padding-bottom: clamp(54px, 6vw, 82px);
}

.article--clarity .hero__dek strong:first-child {
  color: var(--ink);
}

.clarity-answer {
  padding: clamp(24px, 2.8vw, 34px);
}

.clarity-definition {
  padding: 17px 18px;
  border: 1px solid rgba(7, 139, 132, .25);
  border-radius: 15px;
  background: linear-gradient(135deg, rgba(223, 245, 242, .72), rgba(243, 248, 252, .54));
}

.clarity-definition > span {
  display: block;
  margin-bottom: 5px;
  color: var(--teal-strong);
  font-size: .62rem;
  font-weight: 900;
}

.clarity-definition p {
  margin: 0;
  color: var(--muted);
  font-size: .72rem;
  font-weight: 750;
  line-height: 1.55;
}

.clarity-definition strong {
  display: block;
  margin-top: 7px;
  font-size: .89rem;
  line-height: 1.55;
}

.clarity-answer__steps {
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  list-style: none;
}

.clarity-answer__steps li {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}

.clarity-answer__steps li > span {
  width: 25px;
  height: 25px;
  display: grid;
  place-items: center;
  margin-top: 2px;
  color: #fff;
  background: var(--ink);
  border-radius: 8px;
  font: 900 .58rem/1 var(--font-mono);
}

.clarity-answer__steps li:nth-child(2) > span {
  background: var(--teal);
}

.clarity-answer__steps li:nth-child(3) > span {
  background: var(--blue);
}

.clarity-answer__steps p {
  margin: 0;
  color: var(--muted);
  font-size: .69rem;
  font-weight: 650;
  line-height: 1.55;
}

.clarity-answer__steps b {
  display: block;
  color: var(--ink);
  font-size: .75rem;
}

.clarity-answer__boundary {
  margin: 13px 0 0;
  color: var(--muted);
  font-size: .64rem;
  font-weight: 650;
  line-height: 1.65;
}

.clarity-answer__boundary b {
  color: var(--teal-strong);
}

.clarity-lead {
  padding: clamp(24px, 4vw, 48px) 0 clamp(72px, 8vw, 112px);
  background: #fff;
}

.clarity-cost,
.clarity-chain,
.reuse-figure,
.bridge-split,
.decision-flow {
  position: relative;
  margin: 0;
  padding: clamp(28px, 4.4vw, 56px);
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-xl);
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.clarity-cost {
  --cost-width: 100%;
  background:
    radial-gradient(circle at 86% 8%, rgba(115, 216, 206, .13), transparent 25%),
    #fff;
  transition: --cost-width .8s var(--ease);
}

.clarity-cost[data-phase="0"] { --cost-width: 100%; }
.clarity-cost[data-phase="1"] { --cost-width: 84.6%; }
.clarity-cost[data-phase="2"] { --cost-width: 69.2%; }

.clarity-cost figcaption {
  margin-bottom: clamp(30px, 4vw, 48px);
  display: flex;
  justify-content: space-between;
  gap: 36px;
  align-items: end;
}

.clarity-cost h2 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(2rem, 3.8vw, 3.65rem);
  line-height: 1.1;
  letter-spacing: -.052em;
}

.figure-caveat {
  max-width: 290px;
  margin: 0;
  padding: 10px 12px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 11px;
  background: rgba(246, 249, 250, .82);
  font-size: .64rem;
  font-weight: 700;
  line-height: 1.55;
}

.clarity-cost__stage {
  display: grid;
  gap: 18px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--paper-soft);
}

.clarity-cost__row {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: 24px;
  align-items: center;
}

.clarity-cost__name span,
.clarity-cost__name strong {
  display: block;
}

.clarity-cost__name span {
  margin-bottom: 3px;
  color: var(--muted);
  font-size: .62rem;
  font-weight: 850;
}

.clarity-cost__name strong {
  font-size: .83rem;
}

.clarity-cost__track {
  position: relative;
  height: 58px;
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  background:
    repeating-linear-gradient(90deg, transparent 0, transparent calc(10% - 1px), rgba(15,48,69,.055) calc(10% - 1px), rgba(15,48,69,.055) 10%),
    #fff;
}

.clarity-cost__benchmark-bar,
.clarity-cost__bar {
  position: absolute;
  inset: 7px auto 7px 7px;
  border-radius: 9px;
}

.clarity-cost__benchmark-bar {
  width: calc(76.9% - 7px);
  background: linear-gradient(90deg, #cad7df, #aabcc8);
}

.clarity-cost__row--benchmark .clarity-cost__track > b {
  position: absolute;
  z-index: 2;
  left: calc(76.9% - 8px);
  top: 50%;
  color: var(--ink);
  font: 900 .73rem/1 var(--font-mono);
  transform: translate(-100%, -50%);
}

.clarity-cost__threshold {
  position: absolute;
  z-index: 4;
  left: 76.9%;
  top: -11px;
  bottom: -11px;
  width: 2px;
  background: var(--ink);
}

.clarity-cost__threshold em {
  position: absolute;
  left: 50%;
  top: -19px;
  color: var(--ink);
  white-space: nowrap;
  font: normal 900 .54rem/1 var(--font-sans);
  transform: translateX(-50%);
}

.clarity-cost__bar {
  z-index: 3;
  width: calc(var(--cost-width) - 14px);
  min-width: 66px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 15px;
  color: #fff;
  background: linear-gradient(90deg, #18384c, #216ec6);
  box-shadow: 0 6px 20px rgba(33, 110, 198, .17);
  transition: width .78s var(--ease), background .55s ease, box-shadow .55s ease;
}

.clarity-cost[data-phase="2"] .clarity-cost__bar {
  background: linear-gradient(90deg, var(--teal-strong), #13a49b);
  box-shadow: 0 7px 22px rgba(7, 139, 132, .2);
}

.clarity-cost__bar strong {
  position: relative;
  width: 32px;
  height: 20px;
  color: #fff;
  font: 900 .83rem/20px var(--font-mono);
  text-align: center;
}

.clarity-cost__bar [data-cost-value] {
  position: absolute;
  inset: 0;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity .28s ease, transform .32s ease;
}

.clarity-cost[data-phase="0"] [data-cost-value="0"],
.clarity-cost[data-phase="1"] [data-cost-value="1"],
.clarity-cost[data-phase="2"] [data-cost-value="2"] {
  opacity: 1;
  transform: translateY(0);
}

.clarity-cost__steps {
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  list-style: none;
}

.clarity-cost__steps li {
  min-height: 100px;
  display: grid;
  grid-template-columns: 35px 1fr;
  gap: 11px;
  align-items: start;
  padding: 16px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 15px;
  background: #fff;
  opacity: .52;
  transition: opacity .45s ease, border-color .45s ease, background .45s ease, transform .45s var(--ease);
}

.clarity-cost[data-phase="0"] [data-cost-step="0"],
.clarity-cost[data-phase="1"] [data-cost-step="1"],
.clarity-cost[data-phase="2"] [data-cost-step="2"] {
  border-color: rgba(7, 139, 132, .4);
  background: var(--paper-mint);
  opacity: 1;
  transform: translateY(-3px);
}

.clarity-cost__steps li > span {
  width: 33px;
  height: 33px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--ink);
  border-radius: 11px;
  font: 900 .61rem/1 var(--font-mono);
}

.clarity-cost__steps p {
  margin: 0;
  font-size: .69rem;
  font-weight: 650;
  line-height: 1.55;
}

.clarity-cost__steps b {
  display: block;
  margin-bottom: 3px;
  color: var(--ink);
  font-size: .77rem;
}

.clarity-cost__verdict {
  margin-top: 16px;
  min-height: 78px;
  display: grid;
  grid-template-columns: auto 28px auto 1fr;
  gap: 14px;
  align-items: center;
  padding: 14px 18px;
  color: #fff;
  border-radius: 16px;
  background: var(--ink);
}

.clarity-cost__verdict p {
  margin: 0;
  min-width: 68px;
}

.clarity-cost__verdict p span,
.clarity-cost__verdict p strong {
  display: block;
}

.clarity-cost__verdict p span {
  color: rgba(255,255,255,.57);
  font-size: .55rem;
  font-weight: 800;
}

.clarity-cost__verdict p strong {
  color: #fff;
  font: 900 1.55rem/1.1 var(--font-mono);
}

.clarity-cost__verdict > i {
  color: rgba(255,255,255,.45);
  font-style: normal;
}

.clarity-cost__verdict > b {
  justify-self: end;
  color: #98e4dc;
  text-align: right;
  font-size: .8rem;
}

.clarity-chapter {
  padding-block: clamp(82px, 9vw, 126px);
}

.clarity-chapter h2 {
  max-width: 980px;
}

.clarity-chain,
.reuse-figure,
.bridge-split,
.decision-flow {
  border-radius: var(--radius-l);
}

.clarity-chain__flow {
  display: grid;
  grid-template-columns: 1fr 64px 1fr 64px 1fr 64px 1fr;
  gap: 10px;
  align-items: stretch;
}

.clarity-chain__node {
  min-width: 0;
  min-height: 156px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 17px;
  background: var(--paper-soft);
}

.clarity-chain__node > span {
  margin-bottom: 7px;
  color: var(--teal-strong);
  font-size: .61rem;
  font-weight: 900;
}

.clarity-chain__node strong {
  display: block;
  font-size: .91rem;
  line-height: 1.45;
}

.clarity-chain__node small {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: .63rem;
  font-weight: 700;
  line-height: 1.5;
}

.clarity-chain__node--prime {
  border-color: rgba(33, 110, 198, .25);
  background: var(--paper-blue);
}

.clarity-chain__node--xrp {
  border-color: rgba(7, 139, 132, .32);
  background: var(--paper-mint);
  box-shadow: inset 0 -3px 0 rgba(7, 139, 132, .65);
}

.clarity-chain__node--result {
  color: #fff;
  border-color: var(--ink);
  background: var(--ink);
}

.clarity-chain__node--result > span,
.clarity-chain__node--result strong {
  color: #fff;
}

.clarity-chain__node--result small {
  color: rgba(255,255,255,.6);
}

.clarity-chain__flow > i {
  position: relative;
  align-self: center;
  height: 2px;
  background: var(--line-strong);
}

.clarity-chain__flow > i::after {
  content: "";
  position: absolute;
  right: -1px;
  top: 50%;
  width: 8px;
  height: 8px;
  border-top: 2px solid var(--muted);
  border-right: 2px solid var(--muted);
  transform: translateY(-50%) rotate(45deg);
}

.clarity-chain__flow > i::before {
  content: "";
  position: absolute;
  z-index: 2;
  left: 0;
  top: 50%;
  width: 7px;
  height: 7px;
  background: var(--teal);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(7, 139, 132, .12);
  opacity: 0;
  transform: translateY(-50%);
}

.clarity-chain.is-running .clarity-chain__flow > i::before {
  animation: clarity-flow-dot 2.8s ease-in-out infinite;
}

.clarity-chain.is-running .clarity-chain__flow > i:nth-of-type(2)::before {
  animation-delay: .55s;
}

.clarity-chain.is-running .clarity-chain__flow > i:nth-of-type(3)::before {
  animation-delay: 1.1s;
}

.clarity-chain__flow > i span {
  position: absolute;
  left: 50%;
  bottom: 10px;
  color: var(--muted);
  white-space: nowrap;
  font: normal 800 .52rem/1 var(--font-sans);
  transform: translateX(-50%);
}

.clarity-chain__status {
  margin-top: 14px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.clarity-chain__status p {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--muted);
  font-size: .66rem;
  font-weight: 700;
}

.clarity-truth,
.evidence-verdict {
  position: relative;
  margin-top: 46px;
  padding: 26px 28px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-m);
  background: #fff;
  box-shadow: var(--shadow-xs);
}

.clarity-truth::before,
.evidence-verdict::before {
  content: "";
  position: absolute;
  inset: 18px auto 18px 0;
  width: 4px;
  border-radius: 0 4px 4px 0;
  background: linear-gradient(var(--teal), var(--blue));
}

.clarity-truth > span,
.evidence-verdict > span {
  display: block;
  margin-bottom: 8px;
  color: var(--teal-strong);
  font-size: .66rem;
  font-weight: 900;
}

.clarity-truth p,
.evidence-verdict p {
  margin: 0 !important;
  font-size: .9rem !important;
  line-height: 1.85;
}

.reuse-figure__compare {
  display: grid;
  grid-template-columns: 1fr 58px 1fr;
  gap: 18px;
  align-items: stretch;
}

.reuse-figure__side {
  min-width: 0;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 19px;
  background: var(--paper-soft);
}

.reuse-figure__side header span,
.reuse-figure__side header strong {
  display: block;
}

.reuse-figure__side header span {
  color: var(--muted);
  font-size: .62rem;
  font-weight: 850;
}

.reuse-figure__side header strong {
  margin-top: 4px;
  font-size: .96rem;
}

.reuse-figure__side footer {
  margin-top: 19px;
  padding-top: 13px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .66rem;
  font-weight: 800;
}

.split-pools {
  margin-top: 22px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 7px;
}

.split-pools p {
  min-height: 112px;
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 12px 7px;
  border: 1px solid var(--line-strong);
  border-radius: 13px;
  background: #fff;
}

.split-pools i {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--paper-soft);
  font-size: .54rem;
  font-style: normal;
  font-weight: 900;
}

.split-pools b {
  font-size: .62rem;
  text-align: center;
}

.reuse-figure__versus {
  display: grid;
  place-items: center;
  color: var(--teal);
  font: 900 1.5rem/1 var(--font-mono);
}

.reuse-figure__side--shared {
  border-color: rgba(7, 139, 132, .32);
  background: var(--paper-mint);
}

.shared-pool {
  position: relative;
  min-height: 150px;
  margin-top: 12px;
  display: grid;
  grid-template-columns: 112px 1fr;
  gap: 26px;
  align-items: center;
}

.shared-pool__core {
  position: relative;
  width: 102px;
  height: 102px;
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 7px;
  align-items: center;
  padding: 12px;
  color: #fff;
  border-radius: 50%;
  background: linear-gradient(145deg, var(--teal), var(--blue));
  box-shadow: 0 12px 28px rgba(7,139,132,.2);
}

.shared-pool__core::after {
  content: "";
  position: absolute;
  inset: -8px;
  border: 1px dashed rgba(7, 139, 132, .45);
  border-radius: 50%;
}

.reuse-figure.is-running .shared-pool__core::after {
  animation: clarity-orbit 9s linear infinite;
}

.shared-pool__core span {
  width: 29px;
  height: 29px;
  display: grid;
  place-items: center;
  color: var(--ink);
  border-radius: 50%;
  background: #fff;
  font-weight: 900;
}

.shared-pool__core b {
  color: #fff;
  font: 900 .61rem/1.2 var(--font-mono);
}

.shared-pool__markets {
  display: grid;
  gap: 7px;
}

.shared-pool__markets p {
  position: relative;
  min-height: 38px;
  margin: 0;
  display: flex;
  align-items: center;
  padding: 8px 11px 8px 28px;
  border: 1px solid rgba(7, 139, 132, .22);
  border-radius: 10px;
  background: #fff;
  color: var(--ink);
  font-size: .61rem;
  font-weight: 850;
}

.shared-pool__markets p::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 50%;
  width: 45px;
  height: 1px;
  background: rgba(7,139,132,.45);
}

.shared-pool__markets p::after {
  content: "X";
  position: absolute;
  z-index: 2;
  left: -24px;
  top: 50%;
  width: 18px;
  height: 18px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--teal);
  border: 3px solid var(--paper-mint);
  border-radius: 50%;
  font: 900 .45rem/1 var(--font-sans);
  opacity: .35;
  transform: translate(-50%, -50%);
}

.reuse-figure.is-running .shared-pool__markets p::after {
  animation: clarity-market-pulse 2.7s ease-in-out infinite;
}

.reuse-figure.is-running .shared-pool__markets p:nth-child(2)::after {
  animation-delay: .9s;
}

.reuse-figure.is-running .shared-pool__markets p:nth-child(3)::after {
  animation-delay: 1.8s;
}

.bridge-split__grid {
  display: grid;
  grid-template-columns: 1fr 62px 1fr;
  gap: 16px;
  align-items: stretch;
}

.bridge-split__grid > section {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 19px;
  background: var(--paper-soft);
}

.bridge-split__grid > section:last-child {
  border-color: rgba(33, 110, 198, .24);
  background: var(--paper-blue);
}

.bridge-split__label {
  display: block;
  color: var(--teal-strong);
  font: 900 .61rem/1.4 var(--font-mono);
  letter-spacing: .08em;
}

.bridge-split__grid section > strong {
  display: block;
  margin-top: 4px;
  font-size: 1.05rem;
}

.bridge-split__route {
  margin: 25px 0 20px;
  display: grid;
  grid-template-columns: 1fr 26px 62px 26px 1fr;
  align-items: center;
}

.bridge-split__route b,
.bridge-split__route em {
  min-height: 50px;
  display: grid;
  place-items: center;
  padding: 8px;
  border: 1px solid var(--line-strong);
  border-radius: 11px;
  background: #fff;
  font: 850 .61rem/1.4 var(--font-mono);
  text-align: center;
}

.bridge-split__route em {
  color: #fff;
  border: 0;
  border-radius: 50%;
  background: linear-gradient(145deg, var(--teal), var(--blue));
  font-style: normal;
  font-weight: 900;
}

.bridge-split__route i {
  color: var(--muted);
  text-align: center;
  font-style: normal;
}

.bridge-split__grid section > p {
  margin: 0;
  color: var(--muted);
  font-size: .72rem;
  font-weight: 700;
  line-height: 1.7;
}

.bridge-split__not {
  display: grid;
  place-items: center;
  color: var(--ink);
  font: 900 1.1rem/1 var(--font-mono);
}

.decision-flow__gates {
  position: relative;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  list-style: none;
}

.decision-flow__gates::before {
  content: "";
  position: absolute;
  z-index: 0;
  left: 25px;
  top: 36px;
  bottom: 36px;
  width: 2px;
  background: linear-gradient(var(--line-strong), var(--teal), var(--blue));
}

.decision-flow__gates li {
  position: relative;
  z-index: 1;
  min-height: 92px;
  display: grid;
  grid-template-columns: 52px 1fr minmax(170px, .35fr);
  gap: 18px;
  align-items: center;
  padding: 16px 18px 16px 0;
  border: 1px solid var(--line);
  border-radius: 17px;
  background: #fff;
}

.decision-flow__gates li > span {
  width: 50px;
  height: 50px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--ink);
  border: 7px solid #fff;
  border-radius: 50%;
  box-shadow: 0 0 0 1px var(--line-strong);
  font: 900 .65rem/1 var(--font-mono);
}

.decision-flow__gates li:nth-child(2) > span {
  background: var(--teal);
}

.decision-flow__gates li:nth-child(3) > span {
  background: var(--blue);
}

.decision-flow__gates li > div b,
.decision-flow__gates li > div small {
  display: block;
}

.decision-flow__gates li > div b {
  color: var(--ink);
  font-size: .86rem;
}

.decision-flow__gates li > div small {
  margin-top: 4px;
  color: var(--muted);
  font-size: .63rem;
  font-weight: 700;
}

.decision-flow__gates li > em {
  padding: 9px 11px;
  color: var(--coral);
  border: 1px solid rgba(185,81,75,.22);
  border-radius: 10px;
  background: var(--coral-soft);
  font-size: .62rem;
  font-style: normal;
  font-weight: 900;
  text-align: center;
}

.decision-flow__gates li:last-child > em {
  color: var(--teal-strong);
  border-color: rgba(7,139,132,.25);
  background: var(--teal-soft);
}

.decision-flow.is-running .decision-flow__gates li {
  animation: clarity-gate 4.8s ease-in-out infinite;
}

.decision-flow.is-running .decision-flow__gates li:nth-child(2) {
  animation-delay: 1.2s;
}

.decision-flow.is-running .decision-flow__gates li:nth-child(3) {
  animation-delay: 2.4s;
}

.decision-flow__winners {
  margin-top: 14px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.decision-flow__winners p {
  margin: 0;
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: var(--paper-soft);
}

.decision-flow__winners p:last-child {
  border-color: rgba(7,139,132,.27);
  background: var(--paper-mint);
}

.decision-flow__winners span,
.decision-flow__winners b {
  display: block;
}

.decision-flow__winners span {
  margin-bottom: 5px;
  color: var(--teal-strong);
  font-size: .6rem;
  font-weight: 900;
}

.decision-flow__winners b {
  font-size: .7rem;
  line-height: 1.55;
}

.evidence-simple {
  width: min(calc(100% - 40px), var(--page));
  margin: clamp(50px, 6vw, 76px) auto 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-l);
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.evidence-simple > section {
  min-width: 0;
  padding: clamp(26px, 4vw, 44px);
}

.evidence-simple > section:first-child {
  border-right: 1px solid var(--line-strong);
}

.evidence-simple__unknown {
  background: linear-gradient(145deg, rgba(255,244,221,.5), #fff 58%);
}

.evidence-simple header {
  min-height: 58px;
}

.evidence-simple header strong {
  display: block;
  margin-top: 9px;
  font-size: .87rem;
}

.evidence-simple ul {
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 13px;
  list-style: none;
}

.evidence-simple li {
  position: relative;
  padding-left: 18px;
  color: var(--text);
  font-size: .78rem;
  font-weight: 650;
  line-height: 1.75;
}

.evidence-simple li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .73em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 0 4px rgba(7,139,132,.09);
}

.evidence-simple__unknown li::before {
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(169,109,18,.09);
}

.clarity-final .answer-block {
  width: min(calc(100% - 40px), var(--page));
}

.clarity-final__formula {
  margin: 44px 0 34px;
  padding: 18px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  border: 1px solid rgba(11, 27, 42, .08);
  border-radius: 22px;
  background: var(--ink);
  box-shadow: var(--shadow-sm);
}

.clarity-final__formula p {
  position: relative;
  min-width: 0;
  min-height: 112px;
  margin: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 18px;
  border: 1px solid rgba(255,255,255,.17);
  border-radius: 15px;
  background: rgba(255,255,255,.07);
}

.clarity-final__formula p span,
.clarity-final__formula p strong {
  display: block;
}

.clarity-final__formula p span {
  margin-bottom: 6px;
  color: #7dd8d1;
  font-size: .62rem;
  font-weight: 900;
}

.clarity-final__formula p strong {
  color: #fff;
  font-size: .78rem;
  line-height: 1.55;
}

.clarity-final__formula i {
  position: absolute;
  display: none;
}

@keyframes clarity-flow-dot {
  0%, 12% { left: 0; opacity: 0; }
  24% { opacity: 1; }
  78% { opacity: 1; }
  92%, 100% { left: 100%; opacity: 0; transform: translate(-100%, -50%); }
}

@keyframes clarity-orbit {
  to { transform: rotate(360deg); }
}

@keyframes clarity-market-pulse {
  0%, 100% { left: -24px; opacity: .25; transform: translate(-50%, -50%) scale(.85); }
  46% { left: 4px; opacity: 1; transform: translate(-50%, -50%) scale(1); }
  72% { opacity: .38; }
}

@keyframes clarity-gate {
  0%, 18%, 100% { border-color: var(--line); box-shadow: none; transform: translateX(0); }
  28%, 52% { border-color: rgba(7,139,132,.4); box-shadow: 0 10px 28px rgba(19,77,91,.08); transform: translateX(4px); }
  62% { border-color: var(--line); box-shadow: none; transform: translateX(0); }
}

@media (max-width: 1060px) {
  .clarity-chain__flow {
    grid-template-columns: 1fr 42px 1fr;
  }

  .clarity-chain__flow > i:nth-of-type(2) {
    display: none;
  }

  .clarity-chain__flow .clarity-chain__node:nth-of-type(3),
  .clarity-chain__flow .clarity-chain__node:nth-of-type(4) {
    margin-top: 10px;
  }

  .clarity-chain__flow .clarity-chain__node:nth-of-type(3) {
    grid-column: 1;
  }

  .clarity-chain__flow > i:nth-of-type(3) {
    grid-column: 2;
    grid-row: 2;
  }

  .clarity-chain__flow .clarity-chain__node:nth-of-type(4) {
    grid-column: 3;
  }
}

@media (max-width: 820px) {
  .article--clarity .clarity-hero {
    padding-top: 42px;
    padding-bottom: 48px;
  }

  .clarity-cost figcaption {
    display: block;
  }

  .figure-caveat {
    max-width: 100%;
    margin-top: 16px;
  }

  .clarity-cost__row {
    grid-template-columns: 156px minmax(0, 1fr);
    gap: 16px;
  }

  .reuse-figure__compare {
    grid-template-columns: 1fr;
  }

  .reuse-figure__versus {
    min-height: 40px;
    transform: rotate(90deg);
  }

  .bridge-split__grid {
    grid-template-columns: 1fr;
  }

  .bridge-split__not {
    min-height: 38px;
  }

  .decision-flow__winners {
    grid-template-columns: 1fr;
  }

  .clarity-final__formula {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 620px) {
  .article--clarity .clarity-hero {
    padding-top: 28px;
    padding-bottom: 34px;
  }

  .article--clarity .hero__grid {
    gap: 20px;
  }

  .article--clarity .hero h1 {
    font-size: clamp(2.25rem, 10.8vw, 2.9rem);
  }

  .article--clarity .hero__dek {
    margin-top: 16px;
    font-size: .9rem;
    line-height: 1.64;
  }

  .clarity-answer {
    padding: 18px 17px 16px;
  }

  .clarity-answer .hero-answer__label {
    margin-bottom: 11px;
  }

  .clarity-definition {
    padding: 13px 14px;
  }

  .clarity-definition p {
    font-size: .65rem;
  }

  .clarity-definition strong {
    font-size: .78rem;
  }

  .clarity-answer__steps {
    margin-top: 9px;
  }

  .clarity-answer__steps li {
    grid-template-columns: 24px 1fr;
    gap: 8px;
    padding: 7px 0;
  }

  .clarity-answer__steps li > span {
    width: 22px;
    height: 22px;
    border-radius: 7px;
    font-size: .52rem;
  }

  .clarity-answer__steps p {
    font-size: .61rem;
    line-height: 1.45;
  }

  .clarity-answer__steps b {
    font-size: .67rem;
  }

  .clarity-answer__boundary {
    margin-top: 9px;
    font-size: .57rem;
    line-height: 1.52;
  }

  .clarity-lead {
    padding-top: 14px;
    padding-bottom: 72px;
  }

  .clarity-cost,
  .clarity-chain,
  .reuse-figure,
  .bridge-split,
  .decision-flow {
    padding: 22px 14px;
    border-radius: 21px;
  }

  .clarity-cost h2 {
    font-size: 1.8rem;
    line-height: 1.15;
  }

  .clarity-cost__stage {
    gap: 16px;
    padding: 17px 12px;
    border-radius: 16px;
  }

  .clarity-cost__row {
    grid-template-columns: 1fr;
    gap: 7px;
  }

  .clarity-cost__name span {
    font-size: .55rem;
  }

  .clarity-cost__name strong {
    font-size: .7rem;
  }

  .clarity-cost__track {
    height: 49px;
    border-radius: 12px;
  }

  .clarity-cost__threshold {
    top: -7px;
    bottom: -7px;
  }

  .clarity-cost__threshold em {
    top: -15px;
    font-size: .48rem;
  }

  .clarity-cost__steps {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .clarity-cost__steps li {
    min-height: 0;
    grid-template-columns: 30px 1fr;
    padding: 12px;
  }

  .clarity-cost__steps li > span {
    width: 28px;
    height: 28px;
  }

  .clarity-cost__verdict {
    grid-template-columns: auto 18px auto;
    gap: 8px;
    padding: 12px;
  }

  .clarity-cost__verdict > b {
    grid-column: 1 / -1;
    justify-self: stretch;
    padding-top: 10px;
    border-top: 1px solid rgba(255,255,255,.15);
    text-align: left;
    font-size: .68rem;
  }

  .clarity-chapter {
    padding-block: 72px;
  }

  .clarity-chain__flow {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .clarity-chain__node,
  .clarity-chain__flow .clarity-chain__node:nth-of-type(3),
  .clarity-chain__flow .clarity-chain__node:nth-of-type(4) {
    grid-column: 1;
    min-height: 112px;
    margin-top: 0;
    padding: 16px;
  }

  .clarity-chain__flow > i,
  .clarity-chain__flow > i:nth-of-type(2),
  .clarity-chain__flow > i:nth-of-type(3) {
    display: block;
    grid-column: 1;
    grid-row: auto;
    width: 2px;
    height: 30px;
    justify-self: center;
    background: var(--line-strong);
  }

  .clarity-chain__flow > i::after {
    right: 50%;
    top: auto;
    bottom: 0;
    transform: translate(50%, 0) rotate(135deg);
  }

  .clarity-chain__flow > i::before {
    left: 50%;
    top: 0;
    transform: translate(-50%, 0);
  }

  .clarity-chain.is-running .clarity-chain__flow > i::before {
    animation: clarity-flow-dot-mobile 2.8s ease-in-out infinite;
  }

  .clarity-chain__flow > i span {
    left: calc(50% + 12px);
    bottom: 50%;
    transform: translateY(50%);
  }

  .clarity-chain__status {
    grid-template-columns: 1fr;
  }

  .clarity-chain__status p {
    align-items: flex-start;
    font-size: .6rem;
  }

  .clarity-truth,
  .evidence-verdict {
    margin-top: 34px;
    padding: 21px 19px;
  }

  .clarity-truth p,
  .evidence-verdict p {
    font-size: .82rem !important;
  }

  .reuse-figure__side {
    padding: 18px 13px;
  }

  .split-pools {
    gap: 5px;
  }

  .split-pools p {
    min-height: 94px;
    padding: 10px 4px;
  }

  .split-pools i {
    width: 34px;
    height: 34px;
    font-size: .48rem;
  }

  .split-pools b {
    font-size: .55rem;
  }

  .shared-pool {
    min-height: 134px;
    grid-template-columns: 90px 1fr;
    gap: 18px;
  }

  .shared-pool__core {
    width: 82px;
    height: 82px;
    grid-template-columns: 25px 1fr;
    gap: 4px;
    padding: 10px;
  }

  .shared-pool__core span {
    width: 24px;
    height: 24px;
    font-size: .68rem;
  }

  .shared-pool__core b {
    font-size: .51rem;
  }

  .shared-pool__markets p {
    padding-left: 19px;
    font-size: .53rem;
  }

  .bridge-split__grid > section {
    padding: 20px 13px;
  }

  .bridge-split__route {
    grid-template-columns: 1fr 18px 50px 18px 1fr;
  }

  .bridge-split__route b,
  .bridge-split__route em {
    min-height: 46px;
    padding: 5px;
    font-size: .52rem;
  }

  .decision-flow__gates::before {
    left: 22px;
  }

  .decision-flow__gates li {
    grid-template-columns: 46px 1fr;
    gap: 9px;
    padding: 12px 12px 12px 0;
  }

  .decision-flow__gates li > span {
    width: 44px;
    height: 44px;
  }

  .decision-flow__gates li > div b {
    font-size: .72rem;
  }

  .decision-flow__gates li > div small {
    font-size: .55rem;
  }

  .decision-flow__gates li > em {
    grid-column: 2;
    justify-self: start;
    font-size: .55rem;
  }

  .decision-flow__winners p {
    padding: 12px;
  }

  .evidence-simple {
    width: min(calc(100% - 28px), var(--page));
    grid-template-columns: 1fr;
    border-radius: 20px;
  }

  .evidence-simple > section {
    padding: 24px 19px;
  }

  .evidence-simple > section:first-child {
    border-right: 0;
    border-bottom: 1px solid var(--line-strong);
  }

  .evidence-simple li {
    font-size: .72rem;
  }

  .clarity-final .answer-block {
    width: min(calc(100% - 28px), var(--page));
  }

  .clarity-final__formula {
    margin-top: 32px;
    grid-template-columns: 1fr;
    gap: 7px;
  }

  .clarity-final__formula p {
    min-height: 86px;
    padding: 15px;
  }
}

@media (max-width: 360px) {
  .article--clarity .hero h1 {
    font-size: 2.08rem;
  }

  .article--clarity .hero__dek {
    font-size: .8rem;
  }

  .clarity-definition strong {
    font-size: .72rem;
  }

  .clarity-answer__steps {
    grid-template-columns: repeat(3, 1fr);
    gap: 4px;
  }

  .clarity-answer__steps li,
  .clarity-answer__steps li:nth-child(2),
  .clarity-answer__steps li:nth-child(3) {
    display: block;
    padding: 7px 4px;
    border: 1px solid var(--line);
    border-radius: 9px;
    text-align: center;
  }

  .clarity-answer__steps li > span {
    margin: 0 auto 5px;
  }

  .clarity-answer__steps p {
    font-size: 0;
  }

  .clarity-answer__steps b {
    font-size: .51rem;
    line-height: 1.35;
  }

  .clarity-answer__boundary {
    display: none;
  }
}

@keyframes clarity-flow-dot-mobile {
  0%, 12% { top: 0; opacity: 0; transform: translate(-50%, 0); }
  24% { opacity: 1; }
  78% { opacity: 1; }
  92%, 100% { top: 100%; opacity: 0; transform: translate(-50%, -100%); }
}

@media (prefers-reduced-motion: reduce) {
  .clarity-cost {
    --cost-width: 69.2%;
  }

  .clarity-cost [data-cost-step] {
    opacity: 1;
    transform: none;
  }

  .clarity-chain__flow > i::before,
  .shared-pool__core::after,
  .shared-pool__markets p::after,
  .decision-flow__gates li {
    animation: none !important;
  }
}