:root {
  --keh-hero-overlay: linear-gradient(90deg, rgb(16 47 53 / 94%) 0%, rgb(16 47 53 / 82%) 42%, rgb(16 47 53 / 30%) 76%, rgb(16 47 53 / 46%) 100%);
}

main[data-era-progress] {
  --era-intensity: 0.28;
  overflow: clip;
  background: var(--color-parchment-050);
}

.keh-hero {
  position: relative;
  isolation: isolate;
  min-height: 38.75rem;
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  align-items: center;
  color: var(--color-white-100);
  background: var(--color-deep-teal-900);
}

.keh-hero__media,
.keh-hero__media::after {
  position: absolute;
  inset: 0;
}

.keh-hero__media {
  z-index: -2;
  overflow: hidden;
}

.keh-hero__media img {
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
  object-position: center center;
  transform: translateY(calc(var(--era-intensity) * -12px));
  transition: transform 220ms ease;
}

.keh-hero__media::after {
  z-index: 1;
  content: "";
  background: var(--keh-hero-overlay);
}

.keh-hero__content {
  grid-column: 1 / 2;
  width: 100%;
  min-width: 0;
  max-width: 35rem;
  padding-block: var(--space-9);
}

.keh-hero__flow,
.keh-cta-panel__flow {
  display: flex;
  min-width: 0;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-4);
}

.keh-hero__flow > *,
.keh-cta-panel__flow > * {
  margin: 0;
}

.keh-hero .eyebrow {
  color: var(--color-parchment-100);
}

.keh-hero h1 {
  color: var(--color-white-100);
  font-size: var(--text-display);
  text-transform: uppercase;
}

.keh-hero__lead {
  max-width: 32.5rem;
  color: var(--color-white-100);
  font-size: var(--text-lead);
  font-weight: 500;
  line-height: var(--leading-lead);
}

.keh-play-button {
  min-height: 3rem;
  border-color: var(--color-bronze-500);
  box-shadow: inset -3px 0 0 var(--color-bronze-500);
}

.keh-play-mark {
  width: 0;
  height: 0;
  border-top: 0.42rem solid transparent;
  border-bottom: 0.42rem solid transparent;
  border-left: 0.7rem solid var(--color-cyan-400);
}

.keh-disclosure {
  display: flex;
  width: 100%;
  min-width: 0;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-2);
}

.keh-disclosure__chips {
  display: flex;
  min-width: 0;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.keh-hero .chip,
.keh-cta-panel .chip {
  border-color: var(--color-steel-700);
  background: rgb(16 47 53 / 68%);
  color: var(--color-white-100);
}

.keh-disclosure small {
  color: var(--color-parchment-100);
  line-height: var(--leading-caption);
}

.keh-transition {
  height: clamp(5rem, 10vw, 7.5rem);
  background:
    repeating-linear-gradient(18deg, transparent 0 18px, rgb(185 143 98 / calc(var(--era-intensity) * 0.25)) 19px 20px),
    linear-gradient(180deg, var(--color-deep-teal-900), var(--color-parchment-050));
}

.keh-section-heading {
  min-width: 0;
}

.keh-section-heading__rule {
  width: 4.5rem;
  height: 2px;
  margin-bottom: var(--space-4);
  background: var(--color-bronze-500);
}

.keh-editorial-grid {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(15rem, 3fr);
  gap: 8.333%;
  align-items: start;
}

.keh-editorial-grid > * {
  min-width: 0;
}

.keh-prose--intro {
  max-width: 43.75rem;
}

.keh-reading-keys {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: reading-key;
}

.keh-reading-keys li {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: var(--space-3);
  min-width: 0;
  align-items: start;
  padding-top: var(--space-3);
  border-top: var(--border-light);
}

.keh-reading-keys li::before {
  content: counter(reading-key, decimal-leading-zero);
  counter-increment: reading-key;
  color: var(--color-bronze-500);
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
}

.keh-reading-keys strong,
.keh-checklist strong {
  color: var(--color-deep-teal-900);
}

.keh-editorial-rail {
  width: 100%;
  min-width: 0;
  max-width: 20rem;
}

.keh-editorial-rail .card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin: 0;
}

.keh-editorial-rail .card > * {
  margin: 0;
}

.keh-editorial-rail h3 {
  font-size: 1.5rem;
}

.keh-timeline-section {
  position: relative;
  background:
    radial-gradient(circle at 90% 20%, rgb(69 212 229 / calc(var(--era-intensity) * 0.13)), transparent 27%),
    var(--color-parchment-050);
}

.keh-timeline-heading {
  max-width: 47.5rem;
  margin-inline: auto;
  text-align: center;
}

.keh-timeline-heading > :last-child {
  margin-bottom: 0;
}

.keh-timeline {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-4);
  min-width: 0;
  padding-top: 5.5rem;
}

.keh-timeline::before {
  position: absolute;
  top: 3rem;
  right: 3.5rem;
  left: 3.5rem;
  height: 2px;
  content: "";
  background: linear-gradient(90deg, var(--color-bronze-500), var(--color-bronze-500) 70%, var(--color-cyan-400));
}

.keh-timeline__item {
  position: relative;
  display: flex;
  min-width: 0;
  flex-direction: column;
}

.keh-timeline__node {
  position: absolute;
  top: -3.1rem;
  left: 50%;
  z-index: 1;
  width: 1rem;
  height: 1rem;
  border: 3px solid var(--color-parchment-050);
  border-radius: 50%;
  background: var(--color-bronze-500);
  box-shadow: 0 0 0 1px var(--color-bronze-500);
  transform: translateX(-50%);
  transition: background-color var(--transition-base), box-shadow var(--transition-base);
}

.keh-timeline__item.is-active .keh-timeline__node {
  background: var(--color-cyan-400);
  box-shadow: 0 0 0 1px var(--color-cyan-400), 0 0 16px rgb(69 212 229 / 36%);
}

.keh-era-card {
  width: 100%;
  min-width: 0;
  padding: var(--space-4);
  border: var(--border-light);
  border-radius: var(--radius-sm);
  background: var(--color-parchment-100);
}

.keh-era-card--second {
  border-color: var(--color-bronze-500);
  background: linear-gradient(135deg, var(--color-parchment-100), #eddcc0);
}

.keh-era-card--third {
  border-color: var(--color-steel-700);
}

.keh-era-card--fourth {
  border-color: var(--color-cyan-400);
  background: linear-gradient(135deg, #d7e4df, var(--color-parchment-100));
  clip-path: polygon(0 0, calc(100% - 0.375rem) 0, 100% 0.375rem, 100% 100%, 0 100%);
}

.keh-era-card > :last-child {
  margin-bottom: 0;
}

.keh-era-card h3 {
  font-size: 1.65rem;
}

.keh-watch {
  display: block;
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-sandstone-300);
  color: var(--color-deep-teal-900);
  font-size: var(--text-meta);
  font-weight: 700;
  line-height: var(--leading-caption);
}

.keh-strategy-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: 8.333%;
  align-items: start;
}

.keh-strategy-grid > * {
  min-width: 0;
}

.keh-prose--strategy {
  max-width: 35rem;
}

.keh-checklist-panel {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-top: var(--space-6);
  padding: var(--space-5);
  border: var(--border-light);
  background: var(--color-parchment-100);
}

.keh-checklist-panel > * {
  margin: 0;
}

.keh-checklist {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.keh-checklist li {
  min-width: 0;
  padding-left: var(--space-4);
  border-left: 3px solid var(--color-bronze-500);
}

.keh-map-figure {
  width: 100%;
  min-width: 0;
  margin: 0;
}

.keh-map-frame {
  position: relative;
  width: 100%;
  overflow: hidden;
  border: var(--border-light);
  aspect-ratio: 3 / 2;
  background: var(--color-parchment-100);
}

.keh-map-frame img,
.keh-late-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.keh-map-frame img {
  object-position: 65% center;
}

.keh-annotation {
  position: absolute;
  z-index: 2;
  width: 2rem;
  height: 2rem;
  display: inline-grid;
  place-items: center;
  border: 1px solid var(--color-white-100);
  border-radius: 50%;
  background: var(--color-deep-teal-900);
  color: var(--color-white-100);
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1;
  box-shadow: var(--shadow-control);
}

.keh-annotation--one { top: 24%; left: 31%; }
.keh-annotation--two { top: 52%; left: 62%; }
.keh-annotation--three { right: 10%; bottom: 18%; }

.keh-annotation__text {
  position: absolute;
  bottom: calc(100% + var(--space-2));
  left: 50%;
  width: min(14rem, calc(100vw - 4rem));
  padding: var(--space-3);
  border: 1px solid var(--color-cyan-400);
  background: var(--color-deep-teal-900);
  color: var(--color-white-100);
  font-family: var(--font-body);
  font-size: var(--text-caption);
  font-weight: 500;
  line-height: var(--leading-caption);
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 0.35rem);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.keh-annotation:hover .keh-annotation__text,
.keh-annotation:focus .keh-annotation__text,
.keh-annotation.is-open .keh-annotation__text {
  opacity: 1;
  pointer-events: auto;
  transform: translate(-50%, 0);
}

.keh-map-figure figcaption,
.keh-late-figure figcaption {
  max-width: 53.75rem;
}

.keh-visual-review-grid {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(18.75rem, 4fr);
  gap: 8.333%;
  align-items: start;
}

.keh-visual-review-grid > * {
  min-width: 0;
}

.keh-prose--review {
  max-width: 42.5rem;
}

.keh-review-rail {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.keh-review-note {
  width: 100%;
  min-width: 0;
  margin: 0;
  padding: var(--space-4);
  border: var(--border-light);
  background: var(--color-parchment-100);
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

.keh-review-note:hover,
.keh-review-note:focus-within {
  border-color: var(--color-bronze-500);
  box-shadow: var(--shadow-raised);
  transform: translateY(-2px);
}

.keh-review-note--caveat {
  border-left: 3px solid var(--color-crimson-600);
}

.keh-review-note > :last-child { margin-bottom: 0; }
.keh-review-note h3 { font-size: 1.55rem; }

.keh-own-check {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  width: 100%;
  min-width: 0;
  padding: var(--space-4);
  border: var(--border-dark);
  background: transparent;
}

.keh-own-check > * { margin: 0; }

.keh-tactical-section,
.keh-late-section,
.keh-cta-panel {
  color: var(--color-white-100);
  background: var(--color-steel-900);
}

.keh-tactical-section {
  position: relative;
  background:
    linear-gradient(90deg, rgb(69 212 229 / calc(var(--era-intensity) * 0.12)) 1px, transparent 1px),
    linear-gradient(rgb(69 212 229 / calc(var(--era-intensity) * 0.12)) 1px, transparent 1px),
    var(--color-steel-900);
  background-size: 4rem 4rem;
}

.keh-tactical-heading {
  width: 100%;
  min-width: 0;
  max-width: 43.75rem;
  padding-top: var(--space-4);
  border-top: 2px solid var(--color-cyan-400);
}

.keh-tactical-section h2,
.keh-tactical-section h3,
.keh-late-section h2,
.keh-late-section h3,
.keh-cta-panel h2 {
  color: var(--color-white-100);
}

.keh-tactical-section p,
.keh-late-section p,
.keh-cta-panel p {
  color: var(--color-white-100);
}

.keh-decision-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
}

.keh-decision-card {
  width: 100%;
  min-width: 0;
  min-height: 100%;
  padding: var(--space-5);
  border: var(--border-dark);
  background: rgb(70 84 91 / 48%);
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

.keh-decision-card:hover,
.keh-decision-card:focus {
  border-color: var(--color-cyan-400);
  box-shadow: var(--shadow-raised);
  transform: translateY(-2px);
}

.keh-decision-card > :last-child { margin-bottom: 0; }
.keh-decision-card h3 { font-size: 1.7rem; }

.keh-late-section {
  background:
    radial-gradient(circle at 78% 10%, rgb(117 99 199 / calc(var(--era-intensity) * 0.28)), transparent 27%),
    var(--color-steel-900);
}

.keh-late-heading {
  max-width: 42.5rem;
}

.keh-late-figure {
  width: min(100%, 62.5rem);
  min-width: 0;
  margin: var(--space-6) auto 0;
}

.keh-late-figure__frame {
  width: 100%;
  overflow: hidden;
  border: var(--border-dark);
  aspect-ratio: 16 / 10;
}

.keh-late-figure img { object-position: center center; }

.keh-late-grid {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(18.75rem, 4fr);
  gap: 8.333%;
  margin-top: var(--space-6);
  align-items: start;
}

.keh-late-grid > * { min-width: 0; }

.keh-late-analysis {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
}

.keh-late-analysis__panel {
  min-width: 0;
  padding: var(--space-4);
  border: var(--border-dark);
  background: rgb(70 84 91 / 42%);
}

.keh-late-analysis__panel--caveat { border-left: 3px solid var(--color-crimson-600); }
.keh-late-analysis__panel > :last-child { margin-bottom: 0; }

.keh-signal-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  width: 100%;
  min-width: 0;
  padding: var(--space-4);
  border: 1px solid var(--color-cyan-400);
  background: rgb(16 47 53 / 52%);
}

.keh-signal-card > * { margin: 0; }

.keh-signal-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin: 0;
}

.keh-signal-list div {
  min-width: 0;
  padding-left: var(--space-3);
  border-left: 2px solid var(--color-violet-500);
}

.keh-signal-list dt { color: var(--color-cyan-400); }
.keh-signal-list dd { margin: var(--space-1) 0 0; color: var(--color-white-100); }

.keh-balance-heading {
  max-width: 47.5rem;
  margin-inline: auto;
  text-align: center;
}

.keh-balance-heading > :last-child { margin-bottom: 0; }

.keh-balance-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 5fr);
  gap: 16.666%;
  margin-top: var(--space-6);
}

.keh-balance-grid > * { min-width: 0; }

.keh-balance-column {
  width: 100%;
  min-width: 0;
  padding-left: var(--space-4);
  border-left: 3px solid var(--color-bronze-500);
}

.keh-balance-column--caveat { border-left-color: var(--color-crimson-600); }

.keh-balance-column ul {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  padding-left: 1.15em;
}

.keh-balance-column li { min-width: 0; }

.keh-editorial-quote {
  max-width: 47.5rem;
  margin: var(--space-6) 0 0;
}

.keh-cta-panel {
  border-top: 2px solid var(--color-cyan-400);
  background: var(--color-deep-teal-900);
}

.keh-cta-panel__inner {
  width: min(100%, 47.5rem);
  min-width: 0;
  margin-inline: auto;
  text-align: center;
}

.keh-cta-panel__flow { align-items: center; }
.keh-cta-panel__lead { max-width: 38.75rem; }

.keh-cta-panel .keh-disclosure {
  width: min(100%, 38.75rem);
  align-items: flex-start;
  text-align: left;
}

.keh-faq-section {
  background: var(--color-parchment-100);
}

.keh-faq-heading { max-width: 42.5rem; }

.keh-faq-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  width: min(100%, 53.75rem);
  min-width: 0;
  margin-top: var(--space-5);
}

.keh-faq-item {
  width: 100%;
  min-width: 0;
  border: var(--border-light);
  background: var(--color-parchment-050);
}

.keh-faq-question {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 2rem;
  width: 100%;
  min-width: 0;
  min-height: 3rem;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--color-deep-teal-900);
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.08;
  text-align: left;
}

.keh-faq-symbol {
  display: inline-grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border: 1px solid var(--color-bronze-500);
  color: var(--color-bronze-500);
  font-family: var(--font-body);
  font-size: 1.35rem;
  line-height: 1;
}

.keh-faq-answer {
  display: grid;
  grid-template-rows: 0fr;
  opacity: 0;
  transition: grid-template-rows var(--transition-base), opacity var(--transition-fast);
}

.keh-faq-answer[hidden] { display: grid; }
.keh-faq-answer.is-open { grid-template-rows: 1fr; opacity: 1; }
.keh-faq-answer__inner { min-height: 0; overflow: hidden; }
.keh-faq-answer__copy { padding: 0 var(--space-4) var(--space-4); }
.keh-faq-answer__copy > :last-child { margin-bottom: 0; }

@media (max-width: 68.74rem) {
  .keh-hero { min-height: 35rem; }
  .keh-timeline { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: var(--space-6); }
  .keh-timeline::before { display: none; }
  .keh-timeline__item { padding-top: var(--space-5); border-top: 2px solid var(--color-bronze-500); }
  .keh-timeline__item:nth-child(4) { border-top-color: var(--color-cyan-400); }
  .keh-timeline__node { top: -0.56rem; left: var(--space-4); transform: none; }
  .keh-strategy-grid { grid-template-columns: 1fr; gap: var(--space-6); }
  .keh-prose--strategy { max-width: 43.75rem; }
  .keh-map-figure { max-width: 50rem; }
  .keh-decision-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .keh-decision-card:last-child { grid-column: 1 / -1; }
}

@media (max-width: 63.74rem) {
  .keh-editorial-grid,
  .keh-visual-review-grid { grid-template-columns: 1fr; gap: var(--space-6); }
  .keh-editorial-rail { max-width: 100%; }
  .keh-editorial-rail .card { max-width: 32rem; }
  .keh-review-rail { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 56.24rem) {
  .keh-hero { grid-template-columns: 1fr; min-height: 34rem; align-items: end; }
  .keh-hero__media { height: 58%; bottom: auto; }
  .keh-hero__media::after { background: linear-gradient(180deg, rgb(16 47 53 / 20%) 0%, rgb(16 47 53 / 60%) 68%, var(--color-deep-teal-900) 100%); }
  .keh-hero__content { grid-column: 1; max-width: 100%; padding-top: 14rem; padding-bottom: var(--space-7); }
  .keh-hero__lead { max-width: 36rem; }
  .keh-late-grid { grid-template-columns: 1fr; gap: var(--space-5); }
  .keh-late-analysis { max-width: 43.75rem; }
}

@media (max-width: 54.99rem) {
  .keh-balance-heading { margin-inline: 0; text-align: left; }
  .keh-balance-grid { grid-template-columns: 1fr; gap: var(--space-5); }
}

@media (max-width: 49.99rem) {
  .keh-review-rail { grid-template-columns: 1fr; }
  .keh-late-analysis { grid-template-columns: 1fr; }
}

@media (max-width: 44.99rem) {
  .keh-hero { min-height: 32.5rem; }
  .keh-hero__content { padding-top: 13.5rem; }
  .keh-hero h1 { font-size: clamp(2.375rem, 10vw, 2.75rem); }
  .keh-hero__flow { gap: var(--space-3); }
  .keh-play-button { width: 100%; }
  .keh-transition { height: 5rem; }
  .keh-editorial-grid { gap: var(--space-5); }
  .keh-timeline-heading { margin-inline: 0; text-align: left; }
  .keh-timeline { grid-template-columns: 1fr; gap: var(--space-5); padding-left: 1.75rem; padding-top: 0; }
  .keh-timeline::before { display: block; top: 0; bottom: 0; left: 0.45rem; right: auto; width: 2px; height: auto; background: linear-gradient(180deg, var(--color-bronze-500), var(--color-cyan-400)); }
  .keh-timeline__item { padding-top: 0; border-top: 0; }
  .keh-timeline__node { top: 0.45rem; left: -1.3rem; }
  .keh-era-card { padding: var(--space-4); }
  .keh-checklist-panel { padding: var(--space-4); }
  .keh-annotation__text { left: auto; right: -2.2rem; transform: translate(0, 0.35rem); }
  .keh-annotation:hover .keh-annotation__text,
  .keh-annotation:focus .keh-annotation__text,
  .keh-annotation.is-open .keh-annotation__text { transform: translate(0, 0); }
  .keh-annotation--three .keh-annotation__text { right: 0; }
  .keh-tactical-section { background-size: 6rem 6rem; }
  .keh-decision-grid { grid-template-columns: 1fr; }
  .keh-decision-card:last-child { grid-column: auto; }
  .keh-decision-card { padding: var(--space-4); }
  .keh-late-figure { margin-top: var(--space-5); }
  .keh-balance-grid { margin-top: var(--space-5); }
  .keh-cta-panel__inner { width: 100%; }
  .keh-cta-panel .button { width: 100%; }
  .keh-faq-question { min-height: 3.5rem; font-size: 1.35rem; padding: var(--space-3) var(--space-4); }
  .keh-faq-answer__copy { padding: 0 var(--space-4) var(--space-4); }
}

@media (prefers-reduced-motion: reduce) {
  .keh-hero__media img { transform: none; }
  .keh-timeline__node,
  .keh-annotation__text,
  .keh-faq-answer { transition: none; }
}