@font-face {
  font-family: "Sharp Grotesk SmBold 25";
  src: url("fonts/SharpGroteskSmBold25.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Sharp Grotesk Black 15";
  src: url("fonts/SharpGrotesk-Black15.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Sharp Grotesk SemiBold 20";
  src: url("fonts/SharpGrotesk-SemiBold20.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Sharp Grotesk Medium 15";
  src: url("fonts/SharpGrotesk-Medium15.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Sharp Grotesk Medium 20";
  src: url("fonts/SharpGrotesk-Medium20.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Sharp Grotesk Book 20";
  src: url("fonts/SharpGrotesk-Book20.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

:root {
  color-scheme: light;
  --paper-0: #fcfaff;
  --paper-1: #f5f2fd;
  --paper-2: #ece8f9;
  --paper-3: #ded9f2;
  --indigo-1: #f0eefe;
  --indigo-2: #ddd9fd;
  --indigo-3: #b4a9fb;
  --indigo-4: #8b7bf9;
  --indigo-5: #5d4cf4;
  --indigo-6: #261fec;
  --indigo-7: #1e17c0;
  --indigo-8: #191394;
  --indigo-9: #151160;
  --indigo-10: #100e3a;
  --ink-0: #0b0a22;
  --ink-1: #3b3760;
  --ink-2: #514c74;
  --muted-lilac: #b6b1d4;
  --signal-amber: #ffc400;
  --error: #c2183c;
  --success: #1e17c0;
  --font-display: "Sharp Grotesk SmBold 25", "Arial Narrow", sans-serif;
  --font-backdrop: "Sharp Grotesk Black 15", "Arial Narrow", sans-serif;
  --font-headline: "Sharp Grotesk SemiBold 20", "Arial Narrow", sans-serif;
  --font-proof: "Sharp Grotesk Medium 20", "Arial Narrow", sans-serif;
  --font-label: "Sharp Grotesk Medium 15", "Arial Narrow", sans-serif;
  --font-body: "Sharp Grotesk Book 20", Arial, sans-serif;
  --step--1: 0.75rem;
  --step-0: 0.875rem;
  --step-1: 1rem;
  --step-2: 1.1875rem;
  --step-3: 1.5rem;
  --step-4: 2rem;
  --step-5: 2.75rem;
  --step-6: 3.75rem;
  --step-7: 6rem;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;
  --space-10: 8rem;
  --gutter: max(clamp(1.125rem, 4.4vw, 4.5rem), calc((100vw - 120rem) / 2));
  --rule: color-mix(in srgb, var(--ink-0) 18%, transparent);
  --focus-ring: var(--indigo-6);
  accent-color: var(--indigo-6);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --header-height: 4rem;
  --signal-x: 6%;
  --page-progress: 0;
  font-synthesis: none;
}

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

html {
  min-width: 20rem;
  scroll-behavior: smooth;
  scrollbar-color: var(--indigo-6) var(--paper-2);
  scrollbar-width: thin;
}

body {
  min-width: 20rem;
  margin: 0;
  overflow-x: clip;
  background: var(--paper-0);
  color: var(--ink-0);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.58;
  letter-spacing: 0.005em;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
  overscroll-behavior: none;
}

button,
input,
select,
textarea {
  font: inherit;
  font-synthesis: none;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  color: inherit;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.28em;
}

img,
picture,
svg {
  display: block;
  max-width: 100%;
}

img {
  height: auto;
}

[hidden] {
  display: none !important;
}

::selection {
  background: var(--indigo-6);
  color: var(--paper-0);
}

input,
select,
textarea {
  caret-color: var(--indigo-6);
}

:focus-visible {
  outline: 3px solid var(--focus-ring, var(--indigo-6));
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  inset: 0 auto auto 0;
  min-height: 2.75rem;
  padding: 0.75rem 1rem;
  translate: 0 -130%;
  background: var(--ink-0);
  color: var(--paper-0);
  font-family: var(--font-label);
  font-size: var(--step-0);
  text-transform: uppercase;
  transition: translate 180ms var(--ease-out);
}

.skip-link:focus {
  translate: 0;
}

.instrument-label,
.context-label {
  font-family: var(--font-label);
  font-size: var(--step--1);
  line-height: 1.25;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-variant-numeric: tabular-nums;
}

.field-paper,
.field-wash,
.field-prism,
.field-night {
  background: var(--bg);
  color: var(--fg);
  --focus-ring: var(--field-accent);
}

.field-paper {
  --bg: var(--paper-0);
  --fg: var(--ink-0);
  --muted: var(--ink-1);
  --field-rule: color-mix(in srgb, var(--ink-0) 18%, transparent);
  --field-accent: var(--indigo-6);
}

.field-wash {
  --bg: var(--paper-1);
  --fg: var(--ink-0);
  --muted: var(--ink-1);
  --field-rule: color-mix(in srgb, var(--ink-0) 18%, transparent);
  --field-accent: var(--indigo-6);
}

.field-prism {
  --bg: var(--indigo-6);
  --fg: var(--paper-0);
  --muted: var(--indigo-2);
  --field-rule: color-mix(in srgb, var(--paper-0) 30%, transparent);
  --field-accent: var(--signal-amber);
}

.field-night {
  --bg: var(--ink-0);
  --fg: var(--paper-0);
  --muted: var(--muted-lilac);
  --field-rule: color-mix(in srgb, var(--paper-0) 24%, transparent);
  --field-accent: var(--signal-amber);
}

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  display: grid;
  grid-template-columns: minmax(12rem, 1fr) auto minmax(12rem, 1fr);
  min-height: var(--header-height);
  align-items: stretch;
  padding-inline: var(--gutter);
  border-bottom: 1px solid var(--rule);
  background: var(--paper-0);
}

.site-header::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -2px;
  left: 0;
  height: 2px;
  background: var(--indigo-6);
  transform: scaleX(var(--page-progress));
  transform-origin: left;
}

.brand,
.desktop-nav,
.header-actions {
  min-height: var(--header-height);
}

.brand {
  display: inline-flex;
  align-items: center;
  justify-self: start;
  gap: 0.75rem;
  font-family: var(--font-label);
  font-size: var(--step-0);
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
}

.brand-mark {
  width: 1.125rem;
  height: 1.125rem;
  background: var(--indigo-6);
  clip-path: polygon(0 0, 100% 0, 100% 64%, 64% 100%, 0 100%);
}

.desktop-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(1rem, 2.6vw, 2.75rem);
}

.desktop-nav a,
.header-order,
.menu-toggle {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  font-family: var(--font-label);
  font-size: var(--step--1);
  letter-spacing: 0.075em;
  text-decoration: none;
  text-transform: uppercase;
}

.desktop-nav a {
  position: relative;
}

.desktop-nav a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0.25rem;
  left: 0;
  height: 2px;
  background: var(--indigo-6);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 220ms var(--ease-out);
}

.header-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.header-order {
  gap: 0.5rem;
}

.header-order::after {
  content: "↗";
  font-family: var(--font-proof);
  font-size: var(--step-1);
}

.menu-toggle {
  display: none;
  width: 3rem;
  justify-content: center;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.menu-toggle span {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.menu-toggle svg {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
}

.mobile-menu {
  display: none;
}

.action {
  display: inline-flex;
  min-height: 3.25rem;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  padding: 0.75rem 1rem;
  border: 1px solid transparent;
  border-radius: 0;
  clip-path: polygon(0 0, calc(100% - 0.75rem) 0, 100% 0.75rem, 100% 100%, 0 100%);
  font-family: var(--font-label);
  font-size: var(--step-0);
  letter-spacing: 0.06em;
  text-align: left;
  text-transform: uppercase;
  cursor: pointer;
}

.action svg,
.chapter-next svg,
.sticky-order svg {
  width: 1.25rem;
  flex: 0 0 1.25rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  transition: transform 220ms var(--ease-out);
}

.action-primary {
  background: var(--indigo-6);
  color: var(--paper-0);
}

.action-inverse {
  background: var(--paper-0);
  color: var(--indigo-6);
}

.action-large {
  min-height: 4.25rem;
  padding-inline: 1.35rem;
}

.action:disabled {
  opacity: 0.62;
  cursor: not-allowed;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) clamp(16.5rem, 19vw, 19rem);
  min-height: calc(100svh - var(--header-height));
  overflow: clip;
  border-bottom: 2px solid var(--ink-0);
}

.hero-stage {
  position: relative;
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  grid-template-rows: auto 1fr auto;
  min-width: 0;
  min-height: 49rem;
  padding: clamp(2rem, 4vw, 4.5rem) var(--gutter) 0;
  isolation: isolate;
}

.hero-stage::before {
  content: "";
  position: absolute;
  z-index: -2;
  inset: 0;
  background-image:
    linear-gradient(var(--rule) 1px, transparent 1px),
    linear-gradient(90deg, var(--rule) 1px, transparent 1px);
  background-size: clamp(2.75rem, 4vw, 4.5rem) clamp(2.75rem, 4vw, 4.5rem);
  opacity: 0.36;
}

.hero-title {
  z-index: 3;
  grid-column: 1 / 11;
  grid-row: 1;
  align-self: start;
  margin: 0;
  color: var(--indigo-6);
  font-family: var(--font-display);
  font-size: clamp(4.25rem, 8vw, var(--step-7));
  line-height: 0.8;
  letter-spacing: -0.035em;
  text-transform: uppercase;
}

.hero-title span {
  display: block;
}

.hero-copy {
  z-index: 4;
  grid-column: 1 / 5;
  grid-row: 2;
  align-self: end;
  max-width: 27rem;
  padding: 2rem 0 clamp(9rem, 16vh, 12rem);
}

.hero-copy p {
  margin: 0;
}

.hero-promise {
  font-family: var(--font-headline);
  font-size: clamp(2rem, 3.25vw, 3.25rem);
  line-height: 0.96;
  letter-spacing: -0.03em;
}

.formula-mark {
  padding-top: 1.5rem;
  color: var(--indigo-6);
  font-family: var(--font-proof);
  font-size: var(--step-2);
}

.hero-benefits {
  max-width: 32ch;
  padding-top: 0.5rem;
  color: var(--ink-1);
  font-size: var(--step-1);
}

.hero-mobile-action {
  display: none;
  margin-top: 1.5rem;
}

.hero-architecture {
  position: absolute;
  z-index: -1;
  inset: 4.5rem 0 8.5rem 30%;
  overflow: hidden;
  pointer-events: none;
}

.architecture-plane {
  position: absolute;
  display: block;
}

.architecture-plane-a {
  inset: 8% 0 0 20%;
  background: var(--indigo-3);
  clip-path: polygon(42% 0, 100% 0, 100% 100%, 0 100%, 0 62%);
}

.architecture-plane-b {
  inset: 47% -2% 0 0;
  background: var(--indigo-9);
  clip-path: polygon(42% 0, 100% 28%, 100% 100%, 0 100%, 0 72%);
}

.architecture-plane-c {
  inset: 60% 0 0 16%;
  background: var(--indigo-6);
  clip-path: polygon(34% 0, 100% 24%, 100% 100%, 0 100%, 0 48%);
}

.product-hero {
  z-index: 5;
  grid-column: 5 / 11;
  grid-row: 1 / 3;
  align-self: end;
  justify-self: center;
  width: min(33rem, 100%);
  margin: 0 0 5.5rem;
  pointer-events: none;
}

.product-hero picture,
.product-hero img {
  width: 100%;
}

.product-hero img {
  filter: drop-shadow(0 1.9rem 1.9rem color-mix(in srgb, var(--indigo-10) 28%, transparent));
}

.daily-sequence {
  z-index: 8;
  grid-column: 1 / -1;
  grid-row: 3;
  align-self: end;
  min-width: 0;
  border-top: 1px solid var(--ink-0);
  background: color-mix(in srgb, var(--paper-0) 92%, transparent);
}

.sequence-label {
  min-height: 1.75rem;
  padding-block: 0.35rem;
}

.sequence-numbers {
  display: grid;
  grid-template-columns: repeat(16, minmax(2.5rem, 1fr));
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--rule);
  border-left: 1px solid var(--rule);
}

.sequence-numbers li {
  display: grid;
  min-height: 2.5rem;
  place-items: center;
  border-right: 1px solid var(--rule);
  font-family: var(--font-label);
  font-size: var(--step--1);
  font-variant-numeric: tabular-nums;
}

.sequence-phases {
  position: relative;
  display: grid;
  grid-template-columns: 2fr 3fr 3fr 3fr 3fr 2fr;
  border-top: 1px solid var(--ink-0);
}

.sequence-phases::before {
  content: "";
  position: absolute;
  z-index: 3;
  top: -3px;
  left: var(--signal-x);
  width: 2px;
  height: calc(100% + 5px);
  background: var(--signal-amber);
  transition: left 700ms var(--ease-out);
}

.sequence-phase {
  display: flex;
  min-width: 0;
  min-height: 4.5rem;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  border-right: 1px solid var(--rule);
  text-decoration: none;
  transition: background-color 180ms var(--ease-out), color 180ms var(--ease-out);
}

.sequence-phase:last-child {
  border-right: 0;
}

.sequence-phase svg,
.phase-glyph {
  width: 1.5rem;
  height: 1.5rem;
  flex: 0 0 1.5rem;
}

.sequence-phase svg {
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.45;
}

.phase-glyph-sun {
  border: 1px solid currentColor;
  border-radius: 50%;
  box-shadow: 0 0 0 0.35rem color-mix(in srgb, currentColor 16%, transparent);
}

.sequence-phase b,
.sequence-phase small {
  display: block;
}

.sequence-phase b {
  font-family: var(--font-label);
  font-size: var(--step-0);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.sequence-phase small {
  overflow: hidden;
  color: var(--ink-1);
  font-size: var(--step--1);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sequence-phase[aria-current="location"],
.sequence-phase.is-active {
  background: var(--indigo-6);
  color: var(--paper-0);
}

.sequence-phase[aria-current="location"] small,
.sequence-phase.is-active small {
  color: var(--indigo-1);
}

.formula-rail {
  z-index: 7;
  display: flex;
  min-width: 0;
  flex-direction: column;
  border-left: 2px solid var(--ink-0);
  background: var(--paper-0);
}

.rail-row {
  padding: 1rem;
  border-bottom: 1px solid var(--rule);
}

.rail-heading,
.rail-status {
  display: flex;
  min-height: 3.75rem;
  align-items: center;
  justify-content: space-between;
}

.rail-code {
  color: var(--indigo-6);
  font-family: var(--font-backdrop);
  font-size: var(--step-3);
  font-variant-numeric: tabular-nums;
}

.rail-formula {
  display: block;
  padding-top: 1rem;
  color: var(--indigo-6);
  font-family: var(--font-proof);
  font-size: var(--step-4);
  line-height: 1;
}

.rail-claims {
  flex: 1;
}

.rail-claims p {
  margin: 1.25rem 0 0;
  font-family: var(--font-proof);
  font-size: var(--step-2);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.rail-gains {
  display: grid;
  margin: 0.8rem 0 0;
  padding: 0;
  gap: 0.55rem;
  list-style: none;
}

.rail-gains li {
  display: grid;
  gap: 0.15rem;
  padding-top: 0.55rem;
  border-top: 1px solid var(--rule);
}

.rail-gains li:first-child {
  padding-top: 0;
  border-top: 0;
}

.rail-gains b {
  color: var(--indigo-6);
  font-family: var(--font-label);
  font-size: var(--step--1);
  font-weight: 400;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.rail-gains span {
  font-family: var(--font-proof);
  font-size: var(--step-0);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.status-value {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-label);
  font-size: var(--step--1);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.status-value i {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--indigo-6);
}

.rail-purchase {
  margin-top: auto;
  padding: 1rem;
}

.rail-purchase > a {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  font-family: var(--font-label);
  font-size: var(--step--1);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.rail-purchase .action {
  width: 100%;
  margin-top: 0.75rem;
}

.chapter,
.cod-section,
.formula-section,
.stories-section,
.purchase-section,
.faq-section {
  position: relative;
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 0 clamp(0.5rem, 1.25vw, 1.5rem);
  min-height: 44rem;
  overflow: clip;
  padding: clamp(5.5rem, 9vw, 8rem) var(--gutter);
  border-bottom: 1px solid var(--field-rule);
  isolation: isolate;
}

.chapter::before,
.cod-section::before,
.formula-section::before,
.stories-section::before,
.purchase-section::before,
.faq-section::before {
  content: "";
  position: absolute;
  z-index: -2;
  inset: 0;
  background-image:
    linear-gradient(var(--field-rule) 1px, transparent 1px),
    linear-gradient(90deg, var(--field-rule) 1px, transparent 1px);
  background-size: clamp(3rem, 5vw, 5.5rem) clamp(3rem, 5vw, 5.5rem);
  opacity: 0.28;
}

.section-lead,
.chapter-copy {
  position: relative;
  align-self: start;
}

.section-lead {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1rem 1.5rem;
}

.section-lead .context-label {
  grid-column: 2;
  grid-row: 1;
  align-self: start;
  justify-self: end;
  padding: 0.35rem 0.5rem;
  background: var(--field-accent);
  color: var(--bg);
}

.section-lead h2,
.chapter-copy h2 {
  margin: 0;
  font-family: var(--font-headline);
  font-size: clamp(3.25rem, 6vw, var(--step-7));
  line-height: 0.88;
  letter-spacing: -0.03em;
  text-wrap: balance;
}

.section-lead h2 {
  grid-column: 1 / -1;
  grid-row: 1;
  padding-right: min(30%, 9rem);
}

.section-lead > p,
.chapter-copy > p {
  max-width: 64ch;
  margin: 1.25rem 0 0;
  color: var(--muted);
}

/* Paragraphs must claim the full lead width. Without this they auto-place
   into the two grid columns and the proof statement collides with the body. */
.section-lead > p {
  grid-column: 1 / -1;
}

.proof-statement {
  color: var(--fg) !important;
  font-family: var(--font-proof);
  font-size: clamp(1.5rem, 2.3vw, 2.5rem);
  line-height: 1.12;
  letter-spacing: -0.025em;
}

.context-label {
  display: inline-flex;
  min-height: 1.75rem;
  align-items: center;
  padding-inline: 0.5rem;
  background: var(--field-accent);
  color: var(--bg);
  clip-path: polygon(0 0, calc(100% - 0.4rem) 0, 100% 0.4rem, 100% 100%, 0 100%);
}

.display-word,
.formula-word {
  z-index: -1;
  margin: 0;
  color: color-mix(in srgb, var(--field-accent) 16%, transparent);
  font-family: var(--font-backdrop);
  font-size: min(6rem, 11vw);
  line-height: 0.78;
  letter-spacing: -0.035em;
  text-transform: uppercase;
  pointer-events: none;
}

.corner {
  position: absolute;
  z-index: 4;
  width: 2.75rem;
  height: 2.75rem;
  border-color: var(--field-accent);
  pointer-events: none;
}

.corner-tl {
  top: 0;
  left: 0;
  border-top: 1px solid;
  border-left: 1px solid;
}

.corner-tr {
  top: 0;
  right: 0;
  border-top: 1px solid;
  border-right: 1px solid;
}

.corner-bl {
  bottom: 0;
  left: 0;
  border-bottom: 1px solid;
  border-left: 1px solid;
}

.corner-br {
  right: 0;
  bottom: 0;
  border-right: 1px solid;
  border-bottom: 1px solid;
}

.chapter-specimen {
  position: relative;
  min-width: 0;
  min-height: 25rem;
  overflow: hidden;
}

.chapter-specimen picture,
.chapter-specimen img {
  width: 100%;
  height: 100%;
}

.chapter-specimen img {
  object-fit: contain;
  filter: drop-shadow(0 2rem 2.5rem color-mix(in srgb, var(--indigo-6) 20%, transparent));
}

.chapter-evidence,
.chapter-data,
.formula-ledger {
  margin: 0;
}

.chapter-evidence > div,
.chapter-data > div {
  display: grid;
  grid-template-columns: minmax(8rem, 0.9fr) minmax(0, 1.4fr);
  gap: 1rem;
  min-height: 3.75rem;
  align-items: center;
  padding-block: 0.75rem;
  border-top: 1px solid var(--field-rule);
}

.chapter-evidence dt,
.chapter-data dt,
.chapter-evidence dd,
.chapter-data dd {
  margin: 0;
}

.chapter-evidence dt,
.chapter-data dt {
  color: var(--muted);
  font-family: var(--font-label);
  font-size: var(--step--1);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.chapter-evidence dd,
.chapter-data dd {
  font-family: var(--font-proof);
  font-size: var(--step-1);
  line-height: 1.25;
}

.evidence-source a {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  margin-right: 0.75rem;
  color: var(--field-accent);
  font-family: var(--font-label);
  font-size: var(--step-0);
  letter-spacing: 0.03em;
}

.chapter-next {
  display: flex;
  min-height: 7rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem;
  border-top: 1px solid var(--field-rule);
  border-bottom: 1px solid var(--field-rule);
  color: var(--fg);
  text-decoration: none;
}

.chapter-next strong {
  font-family: var(--font-proof);
  font-size: var(--step-3);
  letter-spacing: -0.02em;
}

.chapter-switch {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
}

.chapter-switch-title,
.chapter-switch a {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  font-family: var(--font-proof);
  font-size: clamp(1.5rem, 2.4vw, 2.5rem);
  line-height: 1;
  text-decoration: none;
}

.chapter-switch a {
  color: var(--muted);
}

.chapter-range {
  display: grid;
  width: 100%;
  grid-template-columns: auto 1fr auto;
  gap: 0.75rem;
  align-items: center;
  margin-top: auto;
  color: var(--field-accent);
  font-family: var(--font-label);
  font-size: var(--step-1);
  font-variant-numeric: tabular-nums;
}

.chapter-range i {
  height: 1px;
  background: currentColor;
}

/* Heart: four-part diagnostic spine */
.chapter-heart {
  grid-template-rows: 1fr;
  min-height: 52rem;
}

.chapter-heart .chapter-switch {
  grid-column: 1 / 3;
  align-self: stretch;
}

.chapter-heart .chapter-visual {
  grid-column: 3 / 8;
  align-self: stretch;
}

.heart-visual picture {
  height: 100%;
}

.heart-visual img {
  object-position: center bottom;
}

.heart-signal {
  position: absolute;
  z-index: 3;
  right: -5%;
  bottom: 8%;
  left: -5%;
  width: 110%;
  height: 5rem;
  fill: none;
  stroke: var(--signal-amber);
  stroke-width: 2;
  vector-effect: non-scaling-stroke;
}

.chapter-heart .chapter-copy {
  display: grid;
  grid-column: 8 / 12;
  grid-template-columns: 1fr auto;
  align-self: center;
  gap: 1rem;
}

.chapter-heart .chapter-copy .context-label {
  grid-column: 2;
  grid-row: 1;
  align-self: start;
}

.chapter-heart .chapter-copy h2,
.chapter-heart .chapter-copy > p,
.chapter-heart .chapter-data {
  grid-column: 1 / -1;
}

.chapter-heart .chapter-copy h2 {
  grid-row: 1;
  padding-right: 5rem;
}

.chapter-heart .chapter-next {
  grid-column: 12 / 13;
  align-self: stretch;
  flex-direction: column;
  justify-content: flex-end;
  border: 1px solid var(--field-rule);
  writing-mode: vertical-rl;
}

.chapter-heart .chapter-next svg {
  rotate: 90deg;
}

/* Brain: mirrored two-row editorial spread */
.chapter-brain {
  grid-template-rows: auto 1fr;
  min-height: 55rem;
  background: var(--paper-0);
  color: var(--ink-0);
  --bg: var(--paper-0);
  --fg: var(--ink-0);
  --muted: var(--ink-1);
  --field-rule: color-mix(in srgb, var(--ink-0) 18%, transparent);
  --field-accent: var(--indigo-6);
  --focus-ring: var(--indigo-6);
}

.chapter-brain .display-word {
  position: absolute;
  top: 1.5rem;
  left: var(--gutter);
  color: var(--indigo-2);
}

.brain-lead {
  z-index: 3;
  grid-column: 1 / 6;
  grid-row: 1;
  align-self: end;
  padding-top: 4rem;
}

.brain-specimen {
  grid-column: 6 / 11;
  grid-row: 1 / 3;
  min-height: 41rem;
  align-self: stretch;
}

.brain-specimen::before {
  content: "";
  position: absolute;
  inset: 12% 4% 7%;
  border: 1px solid var(--indigo-4);
}

.brain-specimen img {
  position: relative;
  z-index: 2;
  object-position: center bottom;
}

.specimen-signal {
  position: absolute;
  z-index: 3;
  right: -8%;
  bottom: 11%;
  left: -8%;
  width: 116%;
  height: 7rem;
  fill: none;
  stroke: var(--indigo-6);
  stroke-width: 1.5;
  vector-effect: non-scaling-stroke;
}

.brain-evidence {
  z-index: 3;
  grid-column: 1 / 6;
  grid-row: 2;
  align-self: end;
  margin-top: 3rem;
}

.brain-next {
  grid-column: 11 / 13;
  grid-row: 1 / 3;
  align-self: stretch;
  flex-direction: column;
  justify-content: flex-end;
  border: 1px solid var(--field-rule);
}

/* Motion: mechanical load field */
.chapter-motion {
  grid-template-rows: auto 1fr;
  min-height: 55rem;
}

.chapter-motion .display-word {
  position: absolute;
  right: var(--gutter);
  bottom: 2rem;
  color: color-mix(in srgb, var(--paper-0) 15%, transparent);
}

.joint-specimen {
  grid-column: 1 / 8;
  grid-row: 1 / 3;
  min-height: 42rem;
  align-self: stretch;
}

.joint-specimen img {
  position: absolute;
  z-index: 2;
  inset: 1rem 8% 0;
  width: 84%;
  height: calc(100% - 1rem);
  object-position: center bottom;
}

.joint-orbits {
  position: absolute;
  z-index: 1;
  inset: 4% 1% 1%;
  width: 98%;
  height: 95%;
  fill: none;
  stroke: var(--signal-amber);
  stroke-width: 1;
  opacity: 0.75;
}

.motion-readout {
  position: absolute;
  z-index: 4;
  right: 0;
  bottom: 10%;
  width: min(15rem, 42%);
  padding: 1rem;
  background: var(--signal-amber);
  color: var(--ink-0);
}

.motion-readout span,
.motion-readout b,
.motion-readout small {
  display: block;
}

.motion-readout span,
.motion-readout small {
  font-family: var(--font-label);
  font-size: var(--step--1);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.motion-readout b {
  padding-block: 0.35rem;
  font-family: var(--font-proof);
  font-size: var(--step-4);
  line-height: 1;
}

.motion-lead {
  z-index: 3;
  grid-column: 8 / 13;
  grid-row: 1;
}

.motion-evidence {
  z-index: 3;
  grid-column: 8 / 13;
  grid-row: 2;
  align-self: end;
  margin-top: 3rem;
}

.motion-next {
  grid-column: 8 / 13;
  grid-row: 3;
  align-self: end;
  margin-top: 1.5rem;
}

/* Mood: asymmetric staircase */
.chapter-mood {
  grid-template-rows: auto auto auto;
  min-height: 57rem;
}

.chapter-mood .display-word {
  position: absolute;
  top: 2rem;
  right: var(--gutter);
}

.mood-spectrum {
  position: absolute;
  z-index: -1;
  inset: 0;
  pointer-events: none;
}

.mood-spectrum i {
  position: absolute;
  display: block;
  width: 2px;
  background: var(--signal-amber);
  opacity: 0.72;
}

.mood-spectrum i:nth-child(1) { top: 0; bottom: 56%; left: 16%; }
.mood-spectrum i:nth-child(2) { top: 25%; bottom: 24%; left: 39%; }
.mood-spectrum i:nth-child(3) { top: 12%; bottom: 0; left: 68%; }
.mood-spectrum i:nth-child(4) { top: 49%; right: 10%; bottom: 0; }

.mood-lead {
  z-index: 3;
  grid-column: 1 / 9;
  grid-row: 1;
  padding-right: 2rem;
}

.mood-specimen {
  grid-column: 9 / 13;
  grid-row: 1 / 4;
  min-height: 43rem;
  align-self: stretch;
}

.mood-specimen img {
  object-position: center bottom;
}

.mood-evidence {
  z-index: 3;
  grid-column: 1 / 10;
  grid-row: 2;
  align-self: end;
  margin-top: 3rem;
}

.mood-boundary {
  grid-column: 1 / 8;
  grid-row: 3;
  align-self: end;
  max-width: 62ch;
  margin: 2rem 0 0;
  padding: 1rem;
  border: 1px solid var(--signal-amber);
  color: var(--paper-0);
  font-family: var(--font-proof);
  font-size: var(--step-1);
}

.mood-next {
  grid-column: 10 / 13;
  grid-row: 3;
  align-self: end;
  margin-top: 2rem;
}

/* Rest: temporal horizon */
.chapter-rest {
  grid-template-rows: auto 1fr;
  min-height: 51rem;
  background: var(--paper-1);
  color: var(--ink-0);
  --bg: var(--paper-1);
  --fg: var(--ink-0);
  --muted: var(--ink-1);
  --field-rule: color-mix(in srgb, var(--ink-0) 18%, transparent);
  --field-accent: var(--indigo-6);
  --focus-ring: var(--indigo-6);
}

.chapter-rest .display-word {
  position: absolute;
  top: 2rem;
  left: var(--gutter);
  color: var(--indigo-2);
}

.rest-lead {
  z-index: 3;
  grid-column: 1 / 6;
  grid-row: 1;
  padding-top: 4rem;
}

.rest-orbit {
  position: relative;
  grid-column: 6 / 13;
  grid-row: 1;
  min-height: 24rem;
  overflow: hidden;
}

.rest-disc {
  position: absolute;
  display: block;
  border-radius: 50%;
}

.disc-a {
  width: 20rem;
  height: 20rem;
  top: 1rem;
  right: 8%;
  background: var(--indigo-6);
}

.disc-b {
  width: 13rem;
  height: 13rem;
  top: 4.5rem;
  right: calc(8% + 3.5rem);
  background: var(--signal-amber);
}

.disc-c {
  width: 7rem;
  height: 7rem;
  top: 7.5rem;
  right: calc(8% + 6.5rem);
  background: var(--ink-0);
}

.rest-horizon {
  position: absolute;
  right: 0;
  bottom: 15%;
  left: 0;
  height: 1px;
  background: var(--indigo-6);
}

.rest-signal {
  position: absolute;
  right: var(--gutter);
  bottom: 2rem;
  left: calc(33.333% + var(--gutter) / 2);
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1rem;
  align-items: center;
  font-family: var(--font-label);
  font-size: var(--step-1);
  font-variant-numeric: tabular-nums;
}

.rest-signal i {
  height: 2px;
  background: var(--indigo-6);
}

.day-cycle {
  grid-column: 4 / 13;
  grid-row: 2;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  align-self: end;
  margin: 4rem 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--field-rule);
  border-bottom: 1px solid var(--field-rule);
}

.day-cycle li {
  min-height: 10rem;
  padding: 1rem;
  border-right: 1px solid var(--field-rule);
}

.day-cycle li:last-child {
  border-right: 0;
}

.day-cycle time,
.day-cycle strong,
.day-cycle span {
  display: block;
}

.day-cycle time {
  color: var(--indigo-6);
  font-family: var(--font-label);
  font-size: var(--step-0);
  font-variant-numeric: tabular-nums;
}

.day-cycle strong {
  padding-top: 1rem;
  font-family: var(--font-proof);
  font-size: var(--step-3);
  line-height: 1;
}

.day-cycle span {
  padding-top: 0.5rem;
  color: var(--ink-1);
}

.text-action {
  display: inline-flex;
  grid-column: 1 / 4;
  grid-row: 2;
  min-height: 3rem;
  align-self: end;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.75rem;
  border-top: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
  color: var(--indigo-6);
  font-family: var(--font-label);
  font-size: var(--step-0);
  letter-spacing: 0.05em;
  text-decoration: none;
  text-transform: uppercase;
}

/* The rail carries the same three offers as the purchase section. They share the
   radio group name, so the browser enforces one-at-a-time across both and the
   existing sync picks them up with no extra wiring. */
.rail-options {
  display: grid;
  margin-top: 0.7rem;
  border: 1px solid var(--ink-0);
}

.rail-option {
  position: relative;
  display: grid;
  grid-template-columns: 1.9rem 1fr auto;
  min-height: 3.05rem;
  align-items: center;
  gap: 0.65rem;
  padding: 0.4rem 0.7rem;
  border-bottom: 1px solid var(--rule);
  cursor: pointer;
}

.rail-option:last-child {
  border-bottom: 0;
}

.rail-option input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  cursor: pointer;
  opacity: 0;
}

.rail-option b {
  color: var(--indigo-6);
  font-family: var(--font-backdrop);
  font-size: var(--step-4);
  font-variant-numeric: tabular-nums;
  line-height: 0.85;
}

.rail-option span {
  color: var(--ink-1);
  font-family: var(--font-label);
  font-size: var(--step--1);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.rail-option em {
  font-family: var(--font-proof);
  font-size: var(--step-1);
  font-style: normal;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

/* selected inverts and takes the system's clipped corner */
.rail-option:has(input:checked) {
  background: var(--indigo-6);
  clip-path: polygon(0 0, calc(100% - 0.55rem) 0, 100% 0.55rem, 100% 100%, 0 100%);
}

.rail-option:has(input:checked) b,
.rail-option:has(input:checked) span,
.rail-option:has(input:checked) em {
  color: var(--paper-0);
}

.rail-option input:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: -3px;
}

/* Pricing. One table in the script drives the picker, the dialog select, the
   running totals and the sticky bar; nothing here restates a figure. */
.supply-option {
  grid-template-rows: auto auto 1fr;
  min-height: 11rem;
  align-content: start;
}

.supply-price {
  grid-column: 1 / -1;
  grid-row: 1;
  font-family: var(--font-proof);
  font-size: var(--step-3);
  font-style: normal;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  line-height: 1;
  white-space: nowrap;
}

.supply-each {
  grid-column: 1 / -1;
  grid-row: 2;
  padding-top: 0.35rem;
  font-family: var(--font-label);
  font-size: var(--step--1);
  letter-spacing: 0.05em;
  opacity: 0.72;
  text-transform: uppercase;
  white-space: nowrap;
}

.supply-option span {
  grid-column: 1;
  grid-row: 3;
  align-self: end;
}

.supply-option i {
  grid-column: 2;
  grid-row: 3;
  align-self: end;
}

.purchase-total {
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.purchase-pay {
  padding-top: 0.35rem;
}

.order-total {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.order-total strong {
  font-family: var(--font-proof);
  font-size: var(--step-3);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

@media (max-width: 43.75rem) {
  .supply-option {
    min-height: 0;
    padding-block: 1.25rem;
  }
}

/* Section fields. The generated art is composed as a ground line with objects
   standing on it, so it is laid in as a full-width band anchored to the bottom
   rather than stretched behind the copy. The section's own colour matches the
   art's pale field and continues above it, so the join is invisible and no
   overlay is needed anywhere. */
.cod-section {
  background-color: #edebfc;
  background-image: image-set(url("cod-field-desktop.avif") type("image/avif"), url("cod-field-desktop.webp") type("image/webp"));
  background-position: bottom center;
  background-size: 100% auto;
  background-repeat: no-repeat;
  padding-bottom: 13rem;
}

.formula-section {
  background-color: #ececfc;
  background-image: image-set(url("formula-field-desktop.avif") type("image/avif"), url("formula-field-desktop.webp") type("image/webp"));
  background-position: bottom center;
  background-size: 100% auto;
  background-repeat: no-repeat;
  padding-bottom: 20rem;
}

@media (max-width: 43.75rem) {
  .cod-section {
    background-color: #f0eefc;
    background-image: image-set(url("cod-field-mobile.avif") type("image/avif"), url("cod-field-mobile.webp") type("image/webp"));
    background-size: 100% auto;
    padding-bottom: 15rem;
  }

  .formula-section {
    background-color: #eae9fa;
    background-image: image-set(url("formula-field-mobile.avif") type("image/avif"), url("formula-field-mobile.webp") type("image/webp"));
    background-size: 100% auto;
    padding-bottom: 15rem;
  }
}

/* Cash on delivery: a measured instrument, not a timeline.
   Two tracks run the width of the stage. The upper one is elapsed time on a
   broken scale (an hour ruler to 24, then a jump to delivery). The lower one
   is the customer's money: a dashed void the whole way, solid amber only at
   the final node. The argument is readable before a word is. */
.cod-section {
  min-height: 0;
  padding-block: clamp(3.25rem, 5vw, 4.75rem);
}

.cod-section .display-word {
  position: absolute;
  top: 2rem;
  right: var(--gutter);
  color: var(--indigo-2);
}

.cod-lead {
  grid-column: 1 / 8;
  grid-row: 1;
}

.cod-lead h2 {
  margin: 0;
  font-family: var(--font-headline);
  font-size: clamp(2.75rem, 5.5vw, var(--step-6));
  line-height: 0.9;
  letter-spacing: -0.03em;
  text-wrap: balance;
}

.cod-lead p {
  max-width: 52ch;
  margin: 1.25rem 0 0;
  color: var(--ink-1);
}

.cod-gauge {
  position: relative;
  grid-column: 1 / 13;
  grid-row: 2;
  height: 27rem;
  margin-top: 2.75rem;
}

/* ---- the time track ---- */
.cod-instrument {
  position: absolute;
  inset: 0;
}

.cod-axis {
  position: absolute;
  top: 46%;
  right: 0;
  left: 0;
  height: 2px;
  background: var(--ink-0);
}

.cod-window {
  position: absolute;
  left: var(--x);
  width: var(--span-x);
  top: 46%;
  height: 0.85rem;
  background: var(--indigo-2);
  transform: translateY(-100%);
}

.cod-window-label,
.cod-money-label,
.cod-money-empty,
.cod-money-paid,
.cod-hour {
  position: absolute;
  color: var(--ink-2);
  font-family: var(--font-label);
  font-size: var(--step--1);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  white-space: nowrap;
}

.cod-window-label {
  left: var(--x);
  top: 46%;
  transform: translateY(-2.1rem);
  color: var(--indigo-6);
}

.cod-tick {
  position: absolute;
  left: var(--x);
  top: 46%;
  width: 1px;
  height: 0.5rem;
  background: color-mix(in srgb, var(--ink-0) 35%, transparent);
}

.cod-tick.is-major {
  height: 1rem;
  background: var(--ink-0);
}

.cod-hour {
  left: var(--x);
  top: 46%;
  transform: translate(-50%, 1.35rem);
  font-variant-numeric: tabular-nums;
}

.cod-hour.is-tail {
  color: var(--indigo-6);
}

/* ---- the steps, plotted on the axis ---- */
.cod-steps {
  position: absolute;
  inset: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.cod-step {
  position: absolute;
  left: var(--x);
  width: min(15rem, 22vw);
}

.cod-step.is-above {
  bottom: 56%;
  padding-bottom: 2.25rem;
}

.cod-step.is-below {
  top: 46%;
  padding-top: 2.25rem;
}

.cod-stem {
  position: absolute;
  left: 0;
  width: 1px;
  height: 1.85rem;
  background: var(--indigo-6);
}

.cod-step.is-above .cod-stem { bottom: 0.5rem; }
.cod-step.is-below .cod-stem { top: 0.5rem; }

/* the node sitting on the axis */
.cod-step::after {
  content: "";
  position: absolute;
  left: 0;
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  background: var(--indigo-6);
  transform: translateX(-50%);
}

.cod-step.is-above::after { bottom: -0.35rem; }
.cod-step.is-below::after { top: -0.35rem; }

.cod-step.is-pay::after {
  width: 1.15rem;
  height: 1.15rem;
  border-radius: 0;
  background: var(--signal-amber);
  clip-path: polygon(0 0, 100% 0, 100% 70%, 70% 100%, 0 100%);
}

.cod-step.is-pay .cod-stem {
  width: 3px;
  background: var(--signal-amber);
}

/* The last step is the only one with no room to its right, so it mirrors:
   text right-aligned, stem and node anchored to its trailing edge. It also
   closes the composition rather than running off it. */
.cod-step.is-pay {
  width: min(17rem, 25vw);
  text-align: right;
  transform: translateX(-100%);
}

.cod-step.is-pay .cod-stem {
  right: 0;
  left: auto;
}

.cod-step.is-pay::after {
  right: 0;
  left: auto;
  transform: translateX(50%);
}

.cod-step.is-pay p {
  margin-left: auto;
}

.cod-mark {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.cod-mark svg {
  width: 1.75rem;
  height: 1.75rem;
  flex: 0 0 1.75rem;
  color: var(--indigo-5);
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.45;
}

/* the mirrored final step reverses so its icon stays beside the axis */
.cod-step.is-pay .cod-mark {
  flex-direction: row-reverse;
}

.cod-step.is-pay .cod-mark svg {
  color: var(--indigo-6);
}

.cod-step i {
  display: block;
  color: var(--indigo-5);
  font-family: var(--font-backdrop);
  font-size: var(--step-4);
  font-style: normal;
  font-variant-numeric: tabular-nums;
  line-height: 0.8;
}

.cod-step.is-pay i { color: var(--indigo-6); }

.cod-step strong {
  display: block;
  padding-top: 0.7rem;
  font-family: var(--font-proof);
  font-size: var(--step-3);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.05;
}

.cod-step p {
  max-width: 30ch;
  margin: 0;
  padding-top: 0.5rem;
  color: var(--ink-1);
  font-size: var(--step-0);
}

/* ---- the money track ---- */
.cod-money {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 4rem;
  border-top: 1px solid var(--field-rule);
}

.cod-money-label {
  top: 1rem;
  left: 0;
  color: var(--ink-0);
}

.cod-money-line {
  position: absolute;
  left: var(--x);
  width: var(--span-x);
  top: 2.85rem;
  height: 0;
  border-top: 2px dashed color-mix(in srgb, var(--ink-0) 45%, transparent);
}

.cod-money-empty {
  left: var(--x);
  top: 3.5rem;
}

.cod-money-pay {
  position: absolute;
  left: var(--x);
  top: 2.1rem;
  width: 8rem;
  max-width: 11vw;
  height: 1.6rem;
  background: var(--signal-amber);
  clip-path: polygon(0 0, 100% 0, 100% 62%, 92% 100%, 0 100%);
}

.cod-money-paid {
  left: var(--x);
  top: 3.95rem;
  color: var(--ink-0);
}

.cod-action {
  grid-column: 1 / 5;
  grid-row: 3;
  margin-top: 2rem;
}

/* One authored moment for the whole section: both tracks draw left to right and
   the amber block lands last, so the money arriving is the beat you notice.
   `armed` is set by JS only, keeping the no-JS gauge fully drawn. */
[data-gauge="armed"] .cod-window,
[data-gauge="armed"] .cod-money-line {
  clip-path: inset(0 100% 0 0);
}

[data-gauge="armed"] .cod-money-pay {
  transform: scaleX(0);
  transform-origin: left center;
}

[data-gauge="drawn"] .cod-window,
[data-gauge="drawn"] .cod-money-line {
  clip-path: inset(0 0 0 0);
  transition: clip-path 0.9s var(--ease-out);
}

[data-gauge="drawn"] .cod-money-line {
  transition-delay: 0.16s;
}

[data-gauge="drawn"] .cod-money-pay {
  transform: scaleX(1);
  transition: transform 0.55s var(--ease-out) 0.78s;
}

/* Formula: full verification wall */
.formula-section {
  grid-template-rows: auto 1fr;
  min-height: 50rem;
}

.formula-word {
  position: absolute;
  top: 2rem;
  right: var(--gutter);
  color: var(--indigo-2);
}

.formula-lead {
  grid-column: 1 / 9;
  grid-row: 1;
  padding-right: 2rem;
}

.formula-ledger {
  grid-column: 2 / 13;
  grid-row: 2;
  align-self: end;
  margin-top: 4rem;
  border-top: 2px solid var(--ink-0);
}

.data-row {
  display: grid;
  grid-template-columns: minmax(14rem, 1.2fr) minmax(18rem, 2fr) minmax(8rem, 0.65fr);
  gap: 1.5rem;
  min-height: 5rem;
  align-items: center;
  border-bottom: 1px solid var(--rule);
}

.data-row dt,
.data-row dd {
  margin: 0;
}

.data-row dt {
  display: grid;
  grid-template-columns: 2.25rem 1fr;
  gap: 0.75rem;
  align-items: center;
  font-family: var(--font-label);
  font-size: var(--step-0);
  letter-spacing: 0.035em;
  text-transform: uppercase;
}

.data-row dt span {
  color: var(--indigo-6);
  font-variant-numeric: tabular-nums;
}

.data-row dd {
  font-family: var(--font-proof);
  font-size: var(--step-1);
  line-height: 1.25;
}

.data-status {
  justify-self: stretch;
  padding: 0.5rem 0.75rem;
  background: var(--paper-2);
  color: var(--ink-0);
  font-family: var(--font-label) !important;
  font-size: var(--step--1) !important;
  letter-spacing: 0.05em;
  text-align: center;
  text-transform: uppercase;
}

.is-confirmed .data-status {
  background: var(--indigo-6);
  color: var(--paper-0);
}

.is-pending {
  color: var(--ink-2);
}

/* Stories: uneven open ledger */
.stories-section {
  min-height: 46rem;
}

.stories-lead {
  grid-column: 1 / 5;
  grid-row: 1;
  align-self: center;
}

.stories-ledger {
  grid-column: 5 / 13;
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(14rem, 3fr);
  grid-template-rows: 1fr 1fr;
  min-height: 31rem;
  border-top: 2px solid var(--ink-0);
  border-bottom: 1px solid var(--ink-0);
}

.story-slot {
  display: flex;
  min-width: 0;
  flex-direction: column;
  justify-content: space-between;
  padding: clamp(1.25rem, 2.5vw, 2.5rem);
  border-right: 1px solid var(--rule);
}

.story-slot:first-child {
  grid-row: 1 / 3;
}

.story-slot:nth-child(2) {
  border-bottom: 1px solid var(--rule);
}

.story-slot:last-child {
  border-right: 0;
}

.story-slot > span,
.story-slot footer {
  font-family: var(--font-label);
  font-size: var(--step--1);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.story-slot > span {
  color: var(--indigo-6);
}

.story-slot p {
  max-width: 40ch;
  margin: 3rem 0;
  font-family: var(--font-proof);
  font-size: clamp(1.35rem, 2.3vw, 2.4rem);
  line-height: 1.12;
  letter-spacing: -0.025em;
}

.story-slot footer {
  color: var(--ink-2);
}

/* Purchase: bottom-anchored bay */
.purchase-section {
  min-height: 53rem;
  padding-block: 0;
}

.purchase-section::before {
  opacity: 0.2;
}

.purchase-stage {
  z-index: 3;
  grid-column: 1 / 9;
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  grid-template-rows: auto 1fr auto;
  gap: 0 1rem;
  align-self: stretch;
  padding-block: clamp(5.5rem, 9vw, 8rem);
}

.purchase-lead {
  grid-column: 1 / 7;
  grid-row: 1;
}

.supply-picker {
  grid-column: 1 / -1;
  grid-row: 2;
  width: 100%;
  align-self: end;
  margin-top: 3rem;
}

.supply-picker fieldset {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 0;
  padding: 0;
  border: 1px solid color-mix(in srgb, var(--paper-0) 42%, transparent);
}

.supply-picker legend {
  width: 100%;
  padding: 0 0 0.75rem;
  color: var(--indigo-1);
  font-family: var(--font-label);
  font-size: var(--step--1);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.supply-option {
  position: relative;
  display: grid;
  min-height: 9rem;
  grid-template-columns: 1fr auto;
  align-items: end;
  padding: 1rem;
  border-right: 1px solid color-mix(in srgb, var(--paper-0) 42%, transparent);
}

.supply-option:last-child {
  border-right: 0;
}

.supply-option input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  opacity: 0;
}

.supply-option span b,
.supply-option span small {
  display: block;
}

.supply-option span b {
  font-family: var(--font-backdrop);
  font-size: var(--step-6);
  line-height: 0.85;
  font-variant-numeric: tabular-nums;
}

.supply-option span small,
.supply-option i {
  font-family: var(--font-label);
  font-size: var(--step--1);
  font-style: normal;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.supply-option:has(input:checked) {
  background: var(--paper-0);
  color: var(--indigo-6);
}

.supply-option:has(input:focus-visible) {
  outline: 3px solid var(--signal-amber);
  outline-offset: -6px;
}

.purchase-summary {
  grid-column: 1 / -1;
  grid-row: 3;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(15rem, 0.72fr);
  gap: 1rem;
  align-items: end;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid color-mix(in srgb, var(--paper-0) 42%, transparent);
}

.purchase-price strong,
.purchase-price p {
  display: block;
  margin: 0;
}

.purchase-price strong {
  padding-top: 0.75rem;
  font-family: var(--font-proof);
  font-size: var(--step-2);
}

.purchase-price p {
  max-width: 52ch;
  padding-top: 0.35rem;
  color: var(--indigo-1);
}

.purchase-product {
  position: relative;
  z-index: 2;
  grid-column: 9 / 13;
  align-self: stretch;
  min-height: 53rem;
  overflow: hidden;
  border-left: 1px solid color-mix(in srgb, var(--paper-0) 42%, transparent);
}

.purchase-product::before {
  content: "SUPPLY";
  position: absolute;
  top: 3rem;
  left: 1rem;
  color: color-mix(in srgb, var(--paper-0) 20%, transparent);
  font-family: var(--font-backdrop);
  font-size: min(6rem, 8vw);
  line-height: 0.8;
  letter-spacing: -0.035em;
  writing-mode: vertical-rl;
}

.purchase-product img {
  position: absolute;
  z-index: 2;
  right: -14%;
  bottom: -7%;
  width: min(39rem, 135%);
  max-width: none;
  filter: drop-shadow(0 2.5rem 3rem color-mix(in srgb, var(--ink-0) 35%, transparent));
}

/* FAQ: three-part reading room */
.faq-section {
  min-height: 46rem;
}

.faq-lead {
  grid-column: 1 / 4;
  align-self: start;
}

.faq-instrument {
  grid-column: 4 / 13;
  display: grid;
  grid-template-columns: minmax(15rem, 0.8fr) minmax(0, 1.55fr);
  align-self: stretch;
  border-top: 2px solid var(--ink-0);
  border-bottom: 1px solid var(--ink-0);
}

.faq-tabs {
  border-right: 1px solid var(--rule);
}

.faq-tabs button {
  display: grid;
  width: 100%;
  min-height: 4.75rem;
  grid-template-columns: 2.25rem 1fr;
  gap: 0.75rem;
  align-items: center;
  padding: 0.75rem 1rem;
  border: 0;
  border-bottom: 1px solid var(--rule);
  background: transparent;
  color: var(--ink-0);
  font-family: var(--font-proof);
  font-size: var(--step-1);
  line-height: 1.15;
  text-align: left;
  cursor: pointer;
}

.faq-tabs button:last-child {
  border-bottom: 0;
}

.faq-tabs button span {
  color: var(--indigo-6);
  font-family: var(--font-label);
  font-size: var(--step--1);
  font-variant-numeric: tabular-nums;
}

.faq-tabs button[aria-selected="true"] {
  background: var(--indigo-6);
  color: var(--paper-0);
}

.faq-tabs button[aria-selected="true"] span {
  color: var(--signal-amber);
}

.faq-panels {
  position: relative;
  min-height: 31rem;
}

.faq-panels section {
  min-height: 100%;
  padding: clamp(1.5rem, 4vw, 4rem);
}

.faq-panels h3 {
  max-width: 17ch;
  margin: 2rem 0 0;
  font-family: var(--font-headline);
  font-size: clamp(2.25rem, 4vw, 4.25rem);
  line-height: 0.94;
  letter-spacing: -0.03em;
  text-wrap: balance;
}

.faq-panels p {
  max-width: 66ch;
  margin: 2rem 0 0;
  color: var(--ink-1);
  font-size: var(--step-1);
}

.site-footer {
  display: grid;
  grid-template-columns: 4fr 5fr 3fr;
  gap: 2rem;
  min-height: 25rem;
  align-items: end;
  padding: 5rem var(--gutter) 3rem;
  border-top: 1px solid var(--field-rule);
}

.footer-brand {
  align-self: start;
  font-family: var(--font-display);
  font-size: clamp(3rem, 5vw, 5rem);
  line-height: 0.85;
  letter-spacing: -0.03em;
  text-decoration: none;
}

.site-footer > p:not(.footer-note) {
  align-self: start;
  margin: 0;
  color: var(--indigo-2);
  font-family: var(--font-proof);
  font-size: var(--step-2);
}

.footer-links {
  grid-column: 2;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--field-rule);
}

.footer-links li {
  display: flex;
  min-height: 3rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px solid var(--field-rule);
  font-family: var(--font-label);
  font-size: var(--step--1);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.footer-links b {
  color: var(--signal-amber);
  font-weight: 400;
}

.footer-note {
  grid-column: 3;
  max-width: 38ch;
  margin: 0;
  color: var(--indigo-2);
}

.sticky-order {
  position: fixed;
  z-index: 80;
  right: 1rem;
  bottom: 1rem;
  display: flex;
  min-width: min(22rem, calc(100vw - 2rem));
  min-height: 3.5rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--signal-amber);
  background: var(--ink-0);
  color: var(--paper-0);
  font-family: var(--font-label);
  font-size: var(--step-0);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  translate: 0 1rem;
  pointer-events: none;
  transition: opacity 220ms var(--ease-out), translate 220ms var(--ease-out), visibility 0s linear 220ms;
}

.sticky-order.is-visible {
  opacity: 1;
  visibility: visible;
  translate: 0;
  pointer-events: auto;
  transition-delay: 0s;
}

.order-dialog {
  width: min(68rem, calc(100vw - 2rem));
  max-height: min(56rem, calc(100dvh - 2rem));
  margin: auto;
  padding: 0;
  overflow: auto;
  border: 2px solid var(--ink-0);
  border-radius: 0;
  background: var(--paper-0);
  color: var(--ink-0);
}

.order-dialog::backdrop {
  background: color-mix(in srgb, var(--ink-0) 78%, transparent);
}

.dialog-shell {
  display: grid;
  grid-template-columns: minmax(18rem, 4fr) minmax(0, 8fr);
  min-height: 42rem;
}

.dialog-header {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 2rem;
  border-right: 1px solid var(--rule);
  background: var(--indigo-6);
  color: var(--paper-0);
}

.dialog-header > div {
  padding-top: 4rem;
}

.dialog-header h2,
.order-success h2 {
  margin: 1.5rem 0 0;
  font-family: var(--font-headline);
  font-size: clamp(3rem, 5vw, 5rem);
  line-height: 0.9;
  letter-spacing: -0.03em;
}

.dialog-close {
  order: -1;
  display: grid;
  width: 2.75rem;
  min-height: 2.75rem;
  place-items: center;
  align-self: flex-end;
  padding: 0;
  border: 1px solid color-mix(in srgb, var(--paper-0) 50%, transparent);
  background: transparent;
  color: var(--paper-0);
  cursor: pointer;
}

.dialog-close svg {
  width: 1.25rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
}

.order-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  align-content: start;
  padding: 2rem;
}

.form-field {
  min-width: 0;
}

.form-field-wide,
.order-truth,
.form-status,
.action-submit {
  grid-column: 1 / -1;
}

.form-field label {
  display: flex;
  min-height: 1.75rem;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-label);
  font-size: var(--step--1);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.form-field label span {
  color: var(--ink-2);
}

.form-field input,
.form-field select {
  width: 100%;
  min-height: 3rem;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--ink-2);
  border-radius: 0;
  background: var(--paper-1);
  color: var(--ink-0);
}

.form-field input:disabled,
.form-field select:disabled {
  opacity: 0.7;
}

.form-field input[aria-invalid="true"],
.form-field select[aria-invalid="true"] {
  border-color: var(--error);
  box-shadow: inset 0 -3px 0 var(--error);
}

.honeypot {
  position: absolute;
  left: -9999px;
}

.order-truth {
  margin: 1rem 0 0;
  padding: 1rem;
  border: 1px solid var(--indigo-6);
  color: var(--ink-1);
}

.form-status {
  min-height: 1.5rem;
  color: var(--error);
}

.order-success {
  grid-column: 2;
  align-self: center;
  padding: 3rem;
}

.order-success p {
  max-width: 52ch;
  color: var(--ink-1);
}

.order-success .action {
  margin-top: 2rem;
}

@media (hover: hover) and (pointer: fine) {
  .desktop-nav a:hover::after,
  .desktop-nav a:focus-visible::after {
    transform: scaleX(1);
    transform-origin: left;
  }

  .action:hover svg,
  .chapter-next:hover svg,
  .sticky-order:hover svg {
    transform: translate(0.18rem, -0.18rem);
  }

  .sequence-phase:hover {
    background: var(--indigo-2);
    color: var(--ink-0);
  }

  .sequence-phase[aria-current="location"]:hover,
  .sequence-phase.is-active:hover {
    background: var(--indigo-7);
    color: var(--paper-0);
  }

  .chapter-switch a:hover,
  .evidence-source a:hover {
    color: var(--field-accent);
  }

  .faq-tabs button:hover:not([aria-selected="true"]) {
    background: var(--paper-2);
  }
}

@media (max-width: 75rem) {
  :root {
    --gutter: clamp(1.25rem, 3.25vw, 2.75rem);
  }

  /* the four plotted columns are at their narrowest here, so step copy wraps
     one line taller; the stage grows to keep it off the money track */
  .cod-gauge {
    height: 30rem;
  }

  .hero {
    grid-template-columns: minmax(0, 1fr) 16rem;
  }

  .hero-stage {
    min-height: 45rem;
  }

  .hero-copy {
    grid-column: 1 / 5;
  }

  .product-hero {
    grid-column: 5 / 12;
  }

  .sequence-phase {
    gap: 0.45rem;
    padding-inline: 0.5rem;
  }

  .sequence-phase svg,
  .phase-glyph {
    width: 1.25rem;
    height: 1.25rem;
    flex-basis: 1.25rem;
  }

  .chapter-heart .chapter-switch {
    grid-column: 1 / 4;
  }

  .chapter-heart .chapter-visual {
    grid-column: 4 / 8;
  }

  .chapter-heart .chapter-copy {
    grid-column: 8 / 12;
  }

  .brain-lead,
  .brain-evidence {
    grid-column: 1 / 7;
  }

  .brain-specimen {
    grid-column: 7 / 11;
  }

  .joint-specimen {
    grid-column: 1 / 7;
  }

  .motion-lead,
  .motion-evidence {
    grid-column: 7 / 13;
  }

  .mood-lead {
    grid-column: 1 / 8;
  }

  .mood-specimen {
    grid-column: 8 / 13;
  }

  .mood-evidence {
    grid-column: 1 / 9;
  }

  .mood-next {
    grid-column: 9 / 13;
  }
}

@media (max-width: 62.5rem) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .desktop-nav,
  .header-order {
    display: none;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .mobile-menu {
    position: fixed;
    z-index: 105;
    top: var(--header-height);
    right: 0;
    left: 0;
    display: grid;
    max-height: calc(100dvh - var(--header-height));
    overflow-y: auto;
    overscroll-behavior: contain;
    background: var(--ink-0);
    color: var(--paper-0);
    scrollbar-color: var(--signal-amber) var(--ink-0);
  }

  .mobile-menu a {
    display: flex;
    min-height: 3.5rem;
    align-items: center;
    justify-content: space-between;
    padding-inline: var(--gutter);
    border-bottom: 1px solid color-mix(in srgb, var(--paper-0) 25%, transparent);
    font-family: var(--font-label);
    font-size: var(--step-0);
    letter-spacing: 0.06em;
    text-decoration: none;
    text-transform: uppercase;
  }

  .mobile-menu a::after {
    content: "↗";
    color: var(--signal-amber);
    font-family: var(--font-proof);
  }

  .hero {
    grid-template-columns: 1fr;
  }

  .hero-stage {
    min-height: 44rem;
  }

  .formula-rail {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    border-top: 2px solid var(--ink-0);
    border-left: 0;
  }

  .rail-row,
  .rail-purchase {
    min-width: 0;
    border-right: 1px solid var(--rule);
    border-bottom: 0;
  }

  .rail-heading,
  .rail-status {
    display: block;
  }

  .rail-code,
  .status-value {
    display: flex;
    margin-top: 1rem;
  }

  .rail-claims {
    grid-column: span 2;
  }

  .cod-lead {
    grid-column: 1 / -1;
  }

  .cod-gauge {
    height: 30rem;
  }

  .cod-step {
    width: min(13rem, 24vw);
  }

  .cod-step p {
    font-size: var(--step--1);
  }

  .cod-action {
    grid-column: 1 / 7;
  }

  .rail-purchase {
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    margin: 0;
  }

  .chapter,
  .formula-section,
  .stories-section,
  .purchase-section,
  .faq-section {
    grid-template-columns: repeat(8, minmax(0, 1fr));
  }

  .chapter-heart {
    grid-template-rows: auto auto auto;
  }

  .chapter-heart .chapter-switch {
    grid-column: 1 / 9;
    grid-row: 1;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    margin-bottom: 2rem;
  }

  .chapter-heart .chapter-range {
    width: min(16rem, 100%);
    margin-top: 0;
    margin-left: auto;
  }

  .chapter-heart .chapter-visual {
    grid-column: 1 / 5;
    grid-row: 2;
  }

  .chapter-heart .chapter-copy {
    grid-column: 5 / 9;
    grid-row: 2;
  }

  .chapter-heart .chapter-next {
    grid-column: 5 / 9;
    grid-row: 3;
    min-height: 5rem;
    flex-direction: row;
    writing-mode: initial;
  }

  .chapter-heart .chapter-next svg {
    rotate: 0deg;
  }

  .brain-lead {
    grid-column: 1 / 5;
  }

  .brain-specimen {
    grid-column: 5 / 9;
  }

  .brain-evidence {
    grid-column: 1 / 5;
  }

  .brain-next {
    grid-column: 5 / 9;
    grid-row: 2;
    align-self: end;
    min-height: 5rem;
    flex-direction: row;
  }

  .joint-specimen {
    grid-column: 1 / 5;
    grid-row: 2;
    min-height: 32rem;
  }

  .motion-lead {
    grid-column: 1 / 9;
    grid-row: 1;
    margin-bottom: 3rem;
  }

  .motion-evidence {
    grid-column: 5 / 9;
    grid-row: 2;
  }

  .motion-next {
    grid-column: 5 / 9;
    grid-row: 3;
  }

  .mood-lead {
    grid-column: 1 / 6;
  }

  .mood-specimen {
    grid-column: 6 / 9;
  }

  .mood-evidence {
    grid-column: 1 / 6;
  }

  .mood-boundary {
    grid-column: 1 / 6;
  }

  .mood-next {
    grid-column: 6 / 9;
  }

  .rest-lead {
    grid-column: 1 / 5;
  }

  .rest-orbit {
    grid-column: 5 / 9;
  }

  .rest-signal {
    left: calc(50% + var(--gutter) / 2);
  }

  .day-cycle {
    grid-column: 3 / 9;
  }

  .text-action {
    grid-column: 1 / 3;
  }

  .formula-lead {
    grid-column: 1 / 7;
  }

  .formula-ledger {
    grid-column: 1 / 9;
  }

  .data-row {
    grid-template-columns: minmax(12rem, 1fr) minmax(14rem, 1.5fr) minmax(7rem, 0.6fr);
  }

  .stories-lead {
    grid-column: 1 / 4;
  }

  .stories-ledger {
    grid-column: 4 / 9;
    grid-template-columns: 1fr;
    grid-template-rows: auto;
  }

  .story-slot:first-child {
    grid-row: auto;
  }

  .story-slot {
    border-right: 0;
    border-bottom: 1px solid var(--rule);
  }

  .purchase-stage {
    grid-column: 1 / 7;
  }

  .purchase-product {
    grid-column: 7 / 9;
  }

  .purchase-product img {
    right: -65%;
    width: 210%;
  }

  .faq-lead {
    grid-column: 1 / 9;
    margin-bottom: 3rem;
  }

  .faq-instrument {
    grid-column: 1 / 9;
  }

  .site-footer {
    grid-template-columns: 1fr 1.4fr;
  }

  .footer-note {
    grid-column: 1 / -1;
  }
}

@media (max-width: 43.75rem) {
  :root {
    --gutter: 1rem;
    --header-height: 3.75rem;
  }

  .hero-stage {
    display: flex;
    min-height: auto;
    flex-direction: column;
    padding: 2rem var(--gutter) 0;
  }

  .hero-title {
    font-size: clamp(3.75rem, 19vw, 5.75rem);
  }

  .hero-copy {
    max-width: 32rem;
    align-self: auto;
    padding: 2rem 0 0;
  }

  .hero-architecture {
    inset: 15rem 0 10rem 24%;
  }

  .product-hero {
    width: min(28rem, 92vw);
    align-self: center;
    margin: -1rem auto -1.5rem;
  }

  .daily-sequence {
    width: 100%;
    align-self: stretch;
  }

  .sequence-numbers {
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scrollbar-width: thin;
  }

  .sequence-numbers li {
    scroll-snap-align: start;
  }

  .sequence-phases {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .sequence-phases::before {
    display: none;
  }

  .sequence-phase {
    min-height: 4.75rem;
    border-bottom: 1px solid var(--rule);
  }

  /* Codex left this button display:none with no query to re-enable it, so the
     hero carried no call to action on phones at all. */
  .hero-mobile-action {
    display: inline-flex;
    width: 100%;
  }

  .formula-rail {
    display: block;
  }

  /* The gauge rotates rather than collapsing. Time becomes a vertical axis down
     the left, its hour ruler turning perpendicular, and the money track becomes a
     second vertical line that goes amber at the last node. Every plotted element
     reads --y here instead of --x. */
  .cod-gauge {
    height: 48rem;
    margin-top: 2.25rem;
  }

  .cod-axis {
    top: 0;
    right: auto;
    bottom: 0;
    left: 3.2rem;
    width: 2px;
    height: auto;
  }

  .cod-window {
    top: var(--y);
    left: 3.2rem;
    width: 0.7rem;
    height: var(--span-y);
    transform: translateX(-100%);
  }

  .cod-window-label { display: none; }

  .cod-tick {
    top: var(--y);
    left: 3.2rem;
    width: 0.5rem;
    height: 1px;
  }

  .cod-tick.is-major {
    width: 1rem;
    height: 1px;
  }

  .cod-hour {
    top: var(--y);
    left: 0;
    width: 2.4rem;
    text-align: right;
    transform: translateY(-50%);
  }


  /* steps hang off the axis, stem running horizontally back to their node */
  .cod-step,
  .cod-step.is-above,
  .cod-step.is-below,
  .cod-step.is-pay {
    top: var(--y);
    right: 0;
    left: 5.4rem;
    width: auto;
    padding: 0;
    text-align: left;
    transform: translateY(-0.4rem);
  }

  .cod-stem,
  .cod-step.is-pay .cod-stem {
    top: 0.75rem;
    right: auto;
    left: -2.2rem;
    width: 2.2rem;
    height: 1px;
  }

  .cod-step.is-pay .cod-stem {
    height: 3px;
  }

  .cod-step::after,
  .cod-step.is-above::after,
  .cod-step.is-below::after,
  .cod-step.is-pay::after {
    top: 0.75rem;
    right: auto;
    left: -2.2rem;
    transform: translate(-50%, -50%);
  }

  .cod-step.is-pay .cod-mark {
    flex-direction: row;
  }

  .cod-step i { font-size: var(--step-4); }

  .cod-step p {
    max-width: none;
    padding-top: 0.4rem;
    font-size: var(--step-0);
  }

  .cod-step.is-pay p { margin-left: 0; }

  /* the money track: a dashed void running the height, amber at the last node */
  .cod-money {
    top: 0;
    right: auto;
    bottom: 0;
    left: 4.15rem;
    width: 2px;
    height: auto;
    border-top: 0;
  }

  .cod-money-line {
    top: var(--y);
    left: 0;
    width: 0;
    height: var(--span-y);
    border-top: 0;
    border-left: 2px dashed color-mix(in srgb, var(--ink-0) 45%, transparent);
  }

  .cod-money-pay {
    top: var(--y);
    left: -0.15rem;
    width: 0.55rem;
    max-width: none;
    height: calc(100% - var(--y));
    clip-path: polygon(0 0, 100% 0, 100% 100%, 45% 100%, 0 88%);
  }

  /* an axis label reads down its own track, drafting convention */
  .cod-money-label {
    top: 37%;
    left: 0.55rem;
    transform-origin: left top;
    transform: rotate(90deg);
  }

  .cod-money-empty { display: none; }

  .cod-money-paid {
    top: auto;
    bottom: -1.6rem;
    left: -0.15rem;
  }

  .cod-action {
    grid-column: 1 / -1;
    margin-top: 4.5rem;
  }

  .rail-row,
  .rail-purchase {
    border-right: 0;
    border-bottom: 1px solid var(--rule);
  }

  .rail-heading,
  .rail-status {
    display: flex;
  }

  .rail-code,
  .status-value {
    margin-top: 0;
  }

  .chapter,
  .formula-section,
  .stories-section,
  .purchase-section,
  .faq-section {
    display: flex;
    min-height: 0;
    flex-direction: column;
    padding: 5rem var(--gutter);
  }

  .chapter::before,
  .formula-section::before,
  .stories-section::before,
  .purchase-section::before,
  .faq-section::before {
    background-size: 3rem 3rem;
  }

  .section-lead h2,
  .chapter-copy h2 {
    font-size: clamp(3.25rem, 15vw, 5.5rem);
  }

  .section-lead h2 {
    padding-right: 0;
  }

  .section-lead .context-label,
  .chapter-heart .chapter-copy .context-label {
    grid-column: 2;
    grid-row: 1;
    justify-self: end;
    margin-bottom: 0;
  }

  .section-lead h2,
  .chapter-heart .chapter-copy h2 {
    grid-column: 1 / -1;
    grid-row: 1;
    padding-right: min(34%, 7.5rem);
  }

  .chapter-heart .chapter-switch {
    order: 0;
    margin-bottom: 3rem;
  }

  .chapter-heart .chapter-copy {
    order: 1;
    display: grid;
  }

  .chapter-heart .chapter-visual {
    order: 2;
    min-height: 28rem;
    margin-top: 3rem;
  }

  .chapter-heart .chapter-next {
    order: 3;
    margin-top: 2rem;
  }

  .brain-lead,
  .motion-lead,
  .mood-lead,
  .rest-lead,
  .formula-lead,
  .stories-lead,
  .faq-lead {
    order: 1;
    padding-top: 0;
  }

  .brain-specimen,
  .joint-specimen,
  .mood-specimen,
  .rest-orbit {
    order: 2;
    width: 100%;
    min-height: 28rem;
    margin-top: 3rem;
  }

  .brain-evidence,
  .motion-evidence,
  .mood-evidence,
  .day-cycle,
  .formula-ledger {
    order: 3;
    width: 100%;
    margin-top: 3rem;
  }

  .brain-next,
  .motion-next,
  .mood-next,
  .text-action {
    order: 5;
    width: 100%;
    margin-top: 2rem;
  }

  .mood-boundary {
    order: 4;
    margin-top: 2rem;
  }

  .chapter-rest .display-word,
  .chapter-brain .display-word,
  .chapter-motion .display-word,
  .chapter-mood .display-word,
  .formula-word {
    position: static;
    order: 0;
    margin-bottom: 2.5rem;
    font-size: 4.25rem;
  }

  .rest-signal {
    display: none;
  }

  .day-cycle {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .day-cycle li {
    min-height: 8.5rem;
    border-bottom: 1px solid var(--field-rule);
  }

  .data-row {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 0.75rem 1rem;
    padding-block: 1rem;
  }

  .data-row dt {
    grid-column: 1;
  }

  .data-row dd:not(.data-status) {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .data-status {
    grid-column: 2;
    grid-row: 1;
  }

  .stories-ledger {
    order: 2;
    width: 100%;
    min-height: 0;
    margin-top: 3rem;
  }

  .story-slot {
    min-height: 18rem;
  }

  .purchase-section {
    padding-bottom: 0;
  }

  .purchase-stage {
    order: 1;
    display: flex;
    width: 100%;
    flex-direction: column;
    padding-block: 0;
  }

  .supply-picker {
    margin-top: 3rem;
  }

  .supply-picker fieldset {
    grid-template-columns: 1fr;
  }

  .supply-option {
    min-height: 6rem;
    border-right: 0;
    border-bottom: 1px solid color-mix(in srgb, var(--paper-0) 42%, transparent);
  }

  .purchase-summary {
    grid-template-columns: 1fr;
  }

  .purchase-product {
    order: 2;
    width: calc(100% + 2rem);
    min-height: 30rem;
    margin: 4rem -1rem 0;
    border-top: 1px solid color-mix(in srgb, var(--paper-0) 42%, transparent);
    border-left: 0;
  }

  .purchase-product img {
    right: 50%;
    bottom: -16%;
    width: min(32rem, 110%);
    translate: 50% 0;
  }

  .faq-instrument {
    order: 2;
    display: block;
    width: 100%;
    margin-top: 3rem;
  }

  .faq-tabs {
    display: flex;
    overflow-x: auto;
    border-right: 0;
    border-bottom: 1px solid var(--rule);
    scroll-snap-type: x mandatory;
  }

  .faq-tabs button {
    min-width: 16rem;
    min-height: 4.5rem;
    flex: 0 0 16rem;
    border-right: 1px solid var(--rule);
    border-bottom: 0;
    scroll-snap-align: start;
  }

  .faq-panels {
    min-height: 29rem;
  }

  .faq-panels section {
    padding: 2rem 1rem;
  }

  .site-footer {
    display: flex;
    min-height: 0;
    flex-direction: column;
    align-items: stretch;
    padding: 5rem var(--gutter) 2rem;
  }

  .footer-links {
    width: 100%;
    margin-top: 2rem;
  }

  .footer-note {
    margin-top: 2rem;
  }

  .sticky-order {
    right: 0.75rem;
    bottom: 0.75rem;
    min-width: calc(100vw - 1.5rem);
  }

  .order-dialog {
    width: calc(100vw - 1rem);
    max-height: calc(100dvh - 1rem);
  }

  .dialog-shell {
    display: block;
    min-height: 0;
  }

  .dialog-header {
    min-height: 15rem;
    border-right: 0;
    border-bottom: 1px solid var(--rule);
  }

  .dialog-header > div {
    padding-top: 2rem;
  }

  .order-form {
    grid-template-columns: 1fr;
    padding: 1rem;
  }

  .order-success {
    grid-column: auto;
  }

  .form-field,
  .form-field-wide,
  .order-truth,
  .form-status,
  .action-submit {
    grid-column: 1;
  }
}

@media (max-width: 22rem) {
  .hero-title {
    font-size: 3.6rem;
  }

  .hero-promise,
  .rail-formula {
    font-size: 1.75rem;
  }

  .sequence-phase {
    display: block;
  }

  .sequence-phase svg,
  .phase-glyph {
    margin-bottom: 0.5rem;
  }

  .chapter-switch-title,
  .chapter-switch a {
    font-size: 1.25rem;
  }

  .day-cycle {
    grid-template-columns: 1fr;
  }

  .faq-tabs button {
    min-width: 14rem;
    flex-basis: 14rem;
  }
}

@media (max-height: 35rem) and (max-width: 62.5rem) {
  .mobile-menu a {
    min-height: 3rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }

  .site-header::after,
  .sequence-phases::before {
    transition: none;
  }
}

/* ---------------------------------------------------------------- Legal pages
   Terms and privacy share the product's field system: paper ground, ruled
   blocks, instrument indices, zero radius. */
.legal-body {
  background: var(--paper-0);
  color: var(--ink-0);
}

.legal-main {
  position: relative;
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 0 clamp(0.5rem, 1.25vw, 1.5rem);
  padding: clamp(4rem, 7vw, 7rem) var(--gutter) clamp(4rem, 7vw, 6rem);
}

.legal-lead {
  grid-column: 1 / 10;
  grid-row: 1;
  margin-bottom: 4rem;
}

.legal-lead h1 {
  margin: 0;
  font-family: var(--font-headline);
  font-size: clamp(2.75rem, 5.5vw, var(--step-6));
  line-height: 0.9;
  letter-spacing: -0.03em;
  grid-column: 1 / -1;
  grid-row: 1;
  padding-right: min(30%, 9rem);
  text-wrap: balance;
}

.legal-body-copy {
  grid-column: 2 / 11;
  grid-row: 2;
  border-top: 2px solid var(--ink-0);
}

.legal-block {
  display: grid;
  grid-template-columns: minmax(3rem, 0.4fr) minmax(0, 4fr);
  gap: 1rem clamp(1rem, 3vw, 3rem);
  padding: 2.25rem 0;
  border-bottom: 1px solid var(--rule);
}

.legal-block .instrument-label {
  color: var(--indigo-6);
  font-size: var(--step-1);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.legal-block h2 {
  grid-column: 2;
  margin: 0;
  font-family: var(--font-proof);
  font-size: var(--step-3);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.legal-block p {
  grid-column: 2;
  max-width: 62ch;
  margin: 0;
  color: var(--ink-1);
}

.legal-list {
  grid-column: 2;
  display: grid;
  gap: 0.9rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.legal-list li {
  display: grid;
  gap: 0.15rem;
  max-width: 62ch;
  padding-left: 1rem;
  border-left: 2px solid var(--indigo-3);
}

.legal-list b {
  font-family: var(--font-label);
  font-size: var(--step--1);
  font-weight: 400;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.legal-list span {
  color: var(--ink-1);
}

.legal-replace {
  padding: 0.6rem 0.8rem;
  border: 2px dashed var(--error);
  color: var(--error) !important;
  font-family: var(--font-label);
  font-size: var(--step-0);
  letter-spacing: 0.02em;
}

.legal-back {
  grid-column: 2 / 6;
  grid-row: 3;
  margin-top: 3rem;
}

.footer-legal {
  display: flex;
  grid-column: 1 / -1;
  gap: 2rem;
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--field-rule);
  font-family: var(--font-label);
  font-size: var(--step--1);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.footer-legal a {
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
  color: var(--indigo-2);
}

.footer-legal a[aria-current="page"] {
  color: var(--paper-0);
}

@media (max-width: 62.5rem) {
  .legal-lead { grid-column: 1 / -1; }
  .legal-body-copy { grid-column: 1 / -1; }
  .legal-back { grid-column: 1 / 8; }
}

@media (max-width: 43.75rem) {
  .legal-block {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.75rem;
  }
  .legal-block h2,
  .legal-block p,
  .legal-list { grid-column: 1; }
  .legal-back { grid-column: 1 / -1; }
  .footer-legal { flex-direction: column; gap: 0; }
}