:root {
  --bg: #e7dfd2;
  --paper: rgba(249, 246, 240, 0.97);
  --paper-strong: #fbf8f2;
  --paper-deep: #dfd1bb;
  --paper-wash: #f2ebde;
  --ink: #0d1521;
  --ink-soft: #485462;
  --navy: #0f355d;
  --navy-deep: #071223;
  --navy-soft: #dbe5f3;
  --gold: #af7d23;
  --gold-soft: #ead7af;
  --teal-soft: #d8ebe8;
  --line: #101720;
  --line-soft: rgba(23, 29, 37, 0.16);
  --line-faint: rgba(23, 29, 37, 0.08);
  --shadow: 0 24px 60px rgba(7, 18, 35, 0.14);
  --wrap: min(1180px, calc(100% - 2rem));
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  font-family: "Public Sans", sans-serif;
  color: var(--ink);
  line-height: 1.55;
  background:
    radial-gradient(circle at top left, rgba(15, 53, 93, 0.16), transparent 28rem),
    radial-gradient(circle at top right, rgba(175, 125, 35, 0.14), transparent 26rem),
    linear-gradient(180deg, #faf6ef 0%, var(--bg) 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(17, 20, 26, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(17, 20, 26, 0.03) 1px, transparent 1px);
  background-size: 30px 30px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.16), transparent 76%);
}

a {
  color: inherit;
}

p,
h1,
h2,
h3,
ul {
  margin: 0;
}

select,
button,
input {
  font: inherit;
}

.wrap {
  width: var(--wrap);
  margin: 0 auto;
}

.preview-chrome {
  position: fixed;
  top: 0.2rem;
  left: 0;
  right: 0;
  z-index: 100;
  pointer-events: none;
}

.preview-chrome .wrap {
  width: min(100%, calc(100% - 0.5rem));
  display: flex;
  justify-content: center;
  margin: 0 auto;
}

.preview-bar,
.nav-shell,
.hero-grid,
.hero-proof,
.hero-actions,
.route-grid,
.stats-grid,
.cost-visual,
.cost-side,
.student-section,
.student-rail,
.hub-grid,
.hub-links,
.two-column,
.roles-grid,
.metric-band,
.log-grid,
.footer-shell,
.source-links,
.action-strip,
.page-actions,
.diagram-grid,
.signal-ribbon,
.signal-ribbon-inner,
.infographic-grid,
.pressure-grid,
.launch-grid,
.info-loop,
.loop-ring,
.scroll-chapters,
.immersive-progress,
.sticky-stage,
.stage-stack,
.story-grid,
.story-rail,
.story-panel,
.story-gridline,
.metric-column,
.data-row {
  display: grid;
  gap: 1rem;
}

.preview-bar {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.12rem 0.18rem 0.12rem 0.34rem;
  border: 1px solid var(--line-soft);
  background: rgba(248, 244, 237, 0.82);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
  pointer-events: auto;
}

.preview-note {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.57rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(18, 23, 34, 0.65);
  white-space: nowrap;
}

.preview-note strong {
  color: var(--ink);
}

.preview-note span {
  color: rgba(18, 23, 34, 0.52);
  letter-spacing: 0.08em;
}

.preview-actions {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.preview-actions a,
.preview-actions select {
  min-height: 1.1rem;
  padding: 0 0.36rem;
  border: 1px solid var(--line-soft);
  background: rgba(255, 255, 255, 0.92);
  color: var(--ink);
  font-size: 0.62rem;
  text-decoration: none;
}

.preview-actions select {
  min-width: 18rem;
}

.header {
  padding: 1.35rem 0 2.6rem;
}

.header-compact {
  padding-bottom: 1.9rem;
}

.nav-shell,
.hero-copy,
.hero-proof,
.page-hero,
.route-card,
.student-aside,
.student-step,
.hub-card,
.content-card,
.metric-card,
.log-card,
.footer-shell,
.source-panel,
.action-card,
.diagram-panel,
.ribbon-card,
.pressure-card,
.launch-card,
.stage-card,
.story-card {
  border: 1.5px solid var(--line);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.nav-shell {
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  padding: 1rem 1.05rem;
  border-top-width: 3px;
}

.brand {
  display: inline-grid;
  gap: 0.35rem;
  text-decoration: none;
}

.brand-lockup {
  display: inline-flex;
  gap: 0.9rem;
  align-items: center;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 3.1rem;
  min-height: 3.1rem;
  padding: 0 0.8rem;
  background: var(--navy);
  color: #fff;
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.brand-copy strong,
h1,
h2,
h3,
.metric,
.stat-box strong,
.stage-number,
.immersion-hero strong,
.story-metric strong {
  font-family: "Space Grotesk", sans-serif;
  letter-spacing: -0.045em;
}

.brand-copy small {
  display: block;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.45rem;
}

.nav a,
.button,
.button-secondary,
.text-link,
.chip-link {
  transition:
    color 150ms ease,
    background 150ms ease,
    border-color 150ms ease,
    transform 150ms ease,
    opacity 150ms ease;
}

.nav a {
  padding: 0.72rem 0.88rem;
  border: 1.5px solid var(--line);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
}

.nav a.active,
.nav a:hover,
.nav a:focus-visible {
  background: var(--navy);
  color: #fff;
}

.hero-grid,
.page-hero {
  margin-top: 1rem;
}

.hero-grid {
  grid-template-columns: minmax(0, 1.06fr) minmax(320px, 0.94fr);
  align-items: stretch;
}

.hero-copy,
.hero-proof,
.page-hero,
.route-card,
.student-aside,
.student-step,
.hub-card,
.content-card,
.metric-card,
.log-card,
.footer-shell,
.source-panel,
.action-card,
.diagram-panel,
.ribbon-card,
.pressure-card,
.launch-card,
.stage-card,
.story-card {
  padding: 1.25rem;
}

.hero-copy,
.hero-proof,
.page-hero,
.source-panel,
.content-card,
.hub-card,
.metric-card,
.action-card,
.diagram-panel,
.ribbon-card,
.pressure-card,
.launch-card,
.story-card {
  display: grid;
  gap: 0.9rem;
}

.hero-copy {
  gap: 1rem;
  background:
    linear-gradient(135deg, rgba(15, 53, 93, 0.12), transparent 32%),
    linear-gradient(180deg, rgba(180, 137, 53, 0.08), transparent 12rem),
    var(--paper-strong);
}

.hero-proof {
  align-content: start;
  background:
    linear-gradient(180deg, rgba(180, 137, 53, 0.14), transparent 7rem),
    #f7f1e6;
}

.eyebrow,
.card-tag,
.visual-label,
.step-index,
.metric-label,
.story-kicker,
.stage-label,
.ribbon-index {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(15, 53, 93, 0.86);
}

h1 {
  font-size: clamp(2.7rem, 5.5vw, 5.1rem);
  line-height: 0.9;
  max-width: 11.4ch;
}

h2 {
  font-size: clamp(1.65rem, 3vw, 2.8rem);
  line-height: 0.96;
}

h3 {
  font-size: 1.14rem;
  line-height: 1.08;
}

.lede {
  font-size: 1.07rem;
  max-width: 44rem;
}

.hero-summary,
.section-copy,
.fine-print,
.muted,
.story-note,
.stage-copy {
  color: var(--ink-soft);
}

.hero-actions {
  grid-auto-flow: column;
  justify-content: start;
  gap: 0.7rem;
}

.button,
.button-secondary,
.chip-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.85rem 1.05rem;
  border: 1.5px solid var(--line);
  text-decoration: none;
  font-weight: 700;
}

.button {
  background: var(--navy);
  color: #fff;
}

.button-secondary,
.chip-link {
  background: transparent;
}

.button:hover,
.button-secondary:hover,
.text-link:hover,
.chip-link:hover {
  transform: translateY(-1px);
}

.text-link,
.chip-link {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  color: var(--navy);
  font-weight: 700;
  text-decoration: none;
}

.text-link::after,
.chip-link::after {
  content: "→";
  margin-left: 0.45rem;
}

.chip-link {
  min-height: auto;
  padding: 0.6rem 0.8rem;
  font-size: 0.88rem;
}

.stats-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem 1rem;
}

.stat-box {
  padding-top: 0.9rem;
  border-top: 1.5px solid var(--line);
}

.stat-box strong,
.metric,
.stage-number,
.story-metric strong {
  display: block;
  font-size: clamp(1.8rem, 3vw, 2.7rem);
  line-height: 0.95;
}

.stat-box p {
  margin-top: 0.35rem;
  font-size: 0.94rem;
}

.proof-note {
  padding-top: 0.85rem;
  border-top: 1.5px solid var(--line);
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.section {
  padding: 2rem 0 2.35rem;
  border-top: 1px solid var(--line-soft);
}

.section-head {
  display: grid;
  gap: 0.7rem;
  margin-bottom: 1rem;
}

.section-head.split {
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.85fr);
  align-items: end;
}

.rule {
  height: 2px;
  background: var(--line);
}

.route-grid,
.roles-grid,
.hub-grid,
.action-strip,
.diagram-grid,
.signal-ribbon,
.launch-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.route-card,
.hub-card,
.content-card,
.log-card,
.diagram-panel,
.ribbon-card,
.pressure-card,
.launch-card {
  display: grid;
  gap: 0.75rem;
}

.route-card.featured,
.student-aside,
.metric-card.is-highlight,
.log-card.current-log,
.action-card.featured,
.diagram-panel.featured,
.launch-card.featured {
  background:
    linear-gradient(180deg, rgba(180, 137, 53, 0.14), transparent 9rem),
    var(--paper-strong);
}

.route-card.contrast,
.footer-shell,
.action-card.contrast,
.pressure-card.contrast {
  background: var(--navy-deep);
  color: #fff;
}

.route-card.contrast .card-tag,
.footer-shell .eyebrow,
.action-card.contrast .card-tag,
.pressure-card.contrast .card-tag,
.pressure-card.contrast .eyebrow {
  color: rgba(233, 220, 192, 0.92);
}

.route-card.contrast .text-link,
.action-card.contrast .text-link,
.pressure-card.contrast .text-link {
  color: #fff;
}

.signal-ribbon {
  gap: 0;
  border: 1.5px solid var(--line);
  background: rgba(248, 244, 237, 0.92);
}

.ribbon-card {
  border: 0;
  border-right: 1px solid var(--line);
  box-shadow: none;
}

.ribbon-card:last-child {
  border-right: 0;
}

.signal-ribbon-inner {
  grid-template-columns: auto 1fr;
  align-items: start;
}

.ribbon-index {
  color: var(--ink-soft);
}

.diagram-grid,
.pressure-grid {
  align-items: stretch;
}

.diagram-panel.alt,
.content-card.alt,
.log-card.pending-log,
.launch-card.alt {
  background: var(--paper-deep);
}

.diagram-track {
  position: relative;
  display: grid;
  gap: 0.9rem;
  padding-left: 1.2rem;
}

.diagram-track::before {
  content: "";
  position: absolute;
  left: 0.2rem;
  top: 0.1rem;
  bottom: 0.1rem;
  width: 2px;
  background: linear-gradient(180deg, var(--navy), rgba(15, 53, 93, 0.12));
}

.diagram-node {
  position: relative;
  padding: 0.95rem 1rem;
  border: 1.5px solid var(--line);
  background: rgba(255, 255, 255, 0.78);
}

.diagram-node::before {
  content: "";
  position: absolute;
  left: -1.05rem;
  top: 1rem;
  width: 0.75rem;
  height: 0.75rem;
  border: 2px solid var(--navy);
  background: var(--paper-strong);
}

.cost-visual {
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.8fr);
  border: 1.5px solid var(--line);
  background: rgba(248, 244, 237, 0.97);
  box-shadow: var(--shadow);
}

.cost-main,
.cost-side {
  padding: 1.2rem;
}

.cost-main {
  display: grid;
  gap: 1rem;
  border-right: 1.5px solid var(--line);
}

.cost-bar {
  display: grid;
  grid-template-columns: minmax(140px, 0.58fr) minmax(0, 1.42fr);
  border: 1.5px solid var(--line);
}

.cost-segment {
  padding: 1rem;
}

.cost-segment:first-child {
  border-right: 1.5px solid var(--line);
  background: #fff;
}

.cost-segment:last-child {
  background: var(--gold-soft);
}

.cost-segment strong {
  display: block;
  margin-top: 0.35rem;
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(2rem, 4vw, 3.45rem);
  line-height: 0.92;
}

.cost-side {
  align-content: start;
}

.side-panel {
  padding: 1rem 0;
  border-top: 1.5px solid var(--line);
}

.side-panel:first-child {
  padding-top: 0;
  border-top: 0;
}

.student-section {
  grid-template-columns: minmax(0, 1.18fr) minmax(300px, 0.82fr);
  align-items: start;
}

.student-rail,
.page-actions,
.roles-grid,
.story-rail {
  gap: 0;
  border: 1.5px solid var(--line);
}

.student-step,
.action-card,
.story-panel {
  border: 0;
}

.student-step,
.story-panel {
  border-bottom: 1px solid var(--line);
}

.student-step:last-child,
.action-card:last-child,
.story-panel:last-child {
  border-bottom: 0;
}

.step-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.step-index {
  color: var(--navy);
}

.student-aside {
  display: grid;
  gap: 1rem;
}

.hub-links {
  grid-template-columns: 1fr;
}

.hub-link {
  padding-top: 0.8rem;
  border-top: 1px solid var(--line);
}

.hub-link:first-child {
  padding-top: 0;
  border-top: 0;
}

.infographic-grid,
.two-column {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.pressure-grid {
  grid-template-columns: 1.1fr 0.9fr;
}

.pressure-stack {
  display: grid;
  gap: 1rem;
}

.pressure-card.contrast {
  background:
    linear-gradient(180deg, rgba(180, 137, 53, 0.18), transparent 10rem),
    var(--navy-deep);
}

.pressure-ladder {
  position: relative;
  display: grid;
  gap: 0.7rem;
  padding-top: 0.2rem;
}

.pressure-step {
  padding: 0.95rem 1rem;
  border: 1.5px solid var(--line);
  background: rgba(248, 244, 237, 0.9);
}

.pressure-step:nth-child(2) {
  margin-left: 1.5rem;
}

.pressure-step:nth-child(3) {
  margin-left: 3rem;
}

.pressure-step:nth-child(4) {
  margin-left: 4.5rem;
}

.info-loop {
  grid-template-columns: minmax(220px, 0.9fr) minmax(0, 1.1fr);
  align-items: center;
  border: 1.5px solid var(--line);
  background: var(--paper-wash);
  box-shadow: var(--shadow);
}

.loop-ring {
  place-items: center;
  min-height: 18rem;
  padding: 1rem;
  border-right: 1.5px solid var(--line);
}

.loop-core {
  position: relative;
  width: min(17rem, 72vw);
  aspect-ratio: 1;
  border: 2px solid var(--navy);
  border-radius: 50%;
  background:
    radial-gradient(circle at center, rgba(180, 137, 53, 0.2) 0 28%, transparent 29%),
    radial-gradient(circle at center, rgba(15, 53, 93, 0.08) 0 58%, transparent 59%);
}

.loop-core span {
  position: absolute;
  display: grid;
  place-items: center;
  width: 5.5rem;
  aspect-ratio: 1;
  padding: 0.6rem;
  border: 1.5px solid var(--line);
  border-radius: 50%;
  background: var(--paper-strong);
  font-size: 0.78rem;
  font-weight: 700;
  text-align: center;
}

.loop-core span:nth-child(1) {
  top: -0.7rem;
  left: 50%;
  transform: translateX(-50%);
}

.loop-core span:nth-child(2) {
  right: -0.7rem;
  top: 50%;
  transform: translateY(-50%);
}

.loop-core span:nth-child(3) {
  bottom: -0.7rem;
  left: 50%;
  transform: translateX(-50%);
}

.loop-core span:nth-child(4) {
  left: -0.7rem;
  top: 50%;
  transform: translateY(-50%);
}

.loop-center {
  position: absolute;
  inset: 50%;
  width: 6rem;
  aspect-ratio: 1;
  transform: translate(-50%, -50%);
  display: grid;
  place-items: center;
  padding: 0.6rem;
  border: 1.5px solid var(--line);
  border-radius: 50%;
  background: var(--navy);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  text-align: center;
}

.loop-copy {
  padding: 1.2rem;
}

.loop-copy ul,
.fact-list,
.source-links {
  padding-left: 0;
  list-style: none;
}

.fact-list li,
.loop-copy li {
  padding: 0.72rem 0;
  border-top: 1px solid var(--line-soft);
}

.fact-list li:first-child,
.loop-copy li:first-child {
  border-top: 0;
  padding-top: 0;
}

.metric-band {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.metric-card {
  gap: 0.7rem;
  align-content: start;
}

.metric-label {
  color: var(--ink-soft);
}

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

.role-card {
  padding: 1rem 1.05rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(248, 244, 237, 0.97);
}

.role-card:nth-last-child(-n + 2) {
  border-bottom: 0;
}

.role-card:nth-child(2n) {
  border-right: 0;
}

.action-strip {
  gap: 0;
  border: 1.5px solid var(--line);
}

.action-card {
  border-right: 1px solid var(--line);
}

.action-card:last-child {
  border-right: 0;
}

.source-panel {
  gap: 1rem;
}

.source-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.65rem 1rem;
}

.source-links a {
  padding-bottom: 0.55rem;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  font-weight: 600;
}

.footer {
  padding: 0 0 2rem;
}

.footer-shell {
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.footer-links a {
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  border-bottom: 1px solid rgba(255, 255, 255, 0.35);
}

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

.immersion {
  background:
    radial-gradient(circle at top left, rgba(180, 137, 53, 0.18), transparent 24rem),
    radial-gradient(circle at top right, rgba(15, 53, 93, 0.16), transparent 26rem),
    linear-gradient(180deg, #f7f2e8 0%, #ece4d8 100%);
}

.immersion::before {
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.22), transparent 88%);
}

.immersion .header {
  padding-bottom: 1.55rem;
}

.immersion-hero {
  display: grid;
  gap: 1.2rem;
  padding: 1.7rem;
  border: 2px solid var(--line);
  background:
    linear-gradient(135deg, rgba(15, 53, 93, 0.26), transparent 42%),
    linear-gradient(180deg, rgba(175, 125, 35, 0.18), transparent 13rem),
    rgba(248, 244, 237, 0.96);
  box-shadow: var(--shadow);
}

.hero-statline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.8rem;
}

.hero-stat {
  display: grid;
  gap: 0.45rem;
  padding: 0.95rem;
  border: 1.5px solid var(--line);
  background: rgba(255, 255, 255, 0.82);
}

.hero-stat strong {
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(1.5rem, 2.5vw, 2.2rem);
  line-height: 0.92;
}

.immersive-progress {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.7rem;
}

.progress-chip {
  padding: 0.72rem 0.9rem;
  border: 1.5px solid var(--line);
  background: rgba(255, 255, 255, 0.78);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.progress-chip.active {
  background: var(--navy);
  color: #fff;
}

.scroll-chapters {
  grid-template-columns: minmax(250px, 0.75fr) minmax(0, 1.25fr);
  align-items: start;
}

.sticky-stage {
  position: sticky;
  top: 5.2rem;
}

.stage-card {
  display: grid;
  gap: 1.1rem;
  padding: 1.35rem;
  border-top-width: 3px;
  background:
    linear-gradient(180deg, rgba(15, 53, 93, 0.08), transparent 8rem),
    var(--paper);
}

.stage-stack {
  gap: 0.9rem;
}

.stage-row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.8rem;
  align-items: start;
  padding-top: 0.75rem;
  border-top: 1px solid var(--line-soft);
}

.stage-row:first-child {
  padding-top: 0;
  border-top: 0;
}

.stage-number {
  min-width: 2.8rem;
  font-size: 1.5rem;
}

.story-grid {
  gap: 1.45rem;
}

.story-card {
  position: relative;
  overflow: hidden;
  padding: 1.45rem;
  border-top-width: 3px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.36), transparent 8rem),
    var(--paper);
}

.story-card::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(15, 53, 93, 0.06), transparent 35%),
    linear-gradient(180deg, transparent, rgba(180, 137, 53, 0.06));
}

.story-card[data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition:
    opacity 500ms ease,
    transform 500ms ease;
}

.story-card[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

.story-panel {
  padding: 1.1rem 0;
  border-top: 1px solid var(--line-soft);
}

.story-panel:first-child {
  padding-top: 0;
  border-top: 0;
}

.story-gridline {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem;
}

.story-metric {
  padding: 1.05rem;
  border: 1.5px solid var(--line);
  background: rgba(255, 255, 255, 0.78);
}

.data-row {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border: 1.5px solid var(--line);
  background: rgba(255, 255, 255, 0.48);
}

.data-cell {
  padding: 1.1rem;
  border-right: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.78);
}

.data-cell:last-child {
  border-right: 0;
}

.story-gridline .diagram-node,
.data-row .diagram-node {
  background: rgba(255, 255, 255, 0.7);
}

.story-rail {
  background: rgba(248, 244, 237, 0.84);
}

.story-note {
  max-width: 46rem;
  font-size: 0.95rem;
}

.stage-copy strong {
  color: var(--ink);
}

.story-linkbar,
.story-cta-card {
  display: grid;
  gap: 0.85rem;
}

.story-linkbar {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 0.15rem;
}

.story-linkbar .text-link {
  justify-content: space-between;
  min-height: 3rem;
  padding: 0.9rem 1rem;
  border: 1.5px solid var(--line);
  background: rgba(255, 255, 255, 0.82);
}

.story-highlight {
  padding: 1rem 1.05rem;
  border-left: 4px solid var(--gold);
  background: rgba(234, 215, 175, 0.46);
  font-size: 0.95rem;
}

.story-highlight strong {
  font-family: "Space Grotesk", sans-serif;
}

.story-cta-card {
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  padding: 1.1rem;
  border: 1.5px solid var(--line);
  background:
    linear-gradient(135deg, rgba(15, 53, 93, 0.14), transparent 45%),
    rgba(255, 255, 255, 0.78);
}

.redirect-shell {
  max-width: 48rem;
  gap: 1rem;
}

@media (max-width: 1040px) {
  .hero-grid,
  .section-head.split,
  .cost-visual,
  .student-section,
  .route-grid,
  .hub-grid,
  .two-column,
  .metric-band,
  .log-grid,
  .footer-shell,
  .action-strip,
  .diagram-grid,
  .signal-ribbon,
  .pressure-grid,
  .launch-grid,
  .info-loop,
  .scroll-chapters,
  .story-gridline,
  .data-row,
  .immersive-progress,
  .hero-statline,
  .story-linkbar,
  .story-cta-card {
    grid-template-columns: 1fr;
  }

  .cost-main,
  .loop-ring {
    border-right: 0;
    border-bottom: 1.5px solid var(--line);
  }

  .ribbon-card,
  .action-card,
  .data-cell {
    border-right: 0;
    border-top: 1px solid var(--line);
  }

  .ribbon-card:first-child,
  .action-card:first-child,
  .data-cell:first-child {
    border-top: 0;
  }

  .sticky-stage {
    position: static;
  }

  .pressure-step:nth-child(n) {
    margin-left: 0;
  }
}

@media (max-width: 840px) {
  .nav-shell,
  .signal-ribbon-inner,
  .roles-grid {
    grid-template-columns: 1fr;
  }

  .nav {
    justify-content: flex-start;
  }

  .hero-actions {
    grid-auto-flow: row;
  }

  .role-card {
    border-right: 0;
  }
}

@media (max-width: 720px) {
  .preview-chrome {
    position: static;
    padding: 0.45rem 0.5rem 0;
    pointer-events: auto;
  }

  .preview-bar,
  .stats-grid,
  .source-links {
    grid-template-columns: 1fr;
  }

  .preview-bar {
    display: grid;
    justify-items: stretch;
  }

  .preview-note {
    white-space: normal;
  }

  .preview-actions {
    width: 100%;
  }

  .preview-actions a,
  .preview-actions select {
    width: 100%;
  }

  .cost-bar,
  .story-gridline {
    grid-template-columns: 1fr;
  }

  .cost-segment:first-child {
    border-right: 0;
    border-bottom: 1.5px solid var(--line);
  }

  .loop-core {
    width: min(14rem, 82vw);
  }

  .loop-core span {
    width: 4.9rem;
    font-size: 0.72rem;
  }
}