.site-header-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 110px;
  pointer-events: none;
  z-index: 40;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  mask-image: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.82) 0%,
    rgba(0, 0, 0, 0.32) 45%,
    transparent 100%
  );
  -webkit-mask-image: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.82) 0%,
    rgba(0, 0, 0, 0.32) 45%,
    transparent 100%
  );
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 50;
  background: transparent;
  color: var(--color-ink);
  transition: color 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}

.site-header.is-inverted {
  color: var(--color-paper);
}

.header-inner {
  max-width: var(--page-max-width);
  margin-inline: auto;
  padding-inline: clamp(20px, 4vw, 48px);
  height: 76px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: clamp(18px, 2.4vw, 32px);
}

.site-header nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding-block: 4px;
  font-size: 14px;
  font-weight: 500;
  color: inherit;
  opacity: 0.62;
  border-bottom: 1.5px solid transparent;
  transition:
    opacity 0.2s ease,
    border-color 0.2s ease;
}

.site-header nav a:hover {
  opacity: 1;
}

.site-header nav a[aria-current="location"] {
  opacity: 1;
  font-weight: 600;
  border-bottom-color: currentColor;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  font-family: var(--font-body);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: inherit;
}

.header-right {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 16px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 12px 28px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-ink);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.03em;
  transition:
    transform 0.22s cubic-bezier(0.16, 1, 0.3, 1),
    background-color 0.2s ease,
    color 0.2s ease,
    border-color 0.2s ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button.primary {
  background-color: var(--color-ink);
  color: var(--color-paper);
}

.button.primary:hover {
  background-color: #2e2e29;
  border-color: #2e2e29;
}

.site-header.is-inverted .header-cta {
  background-color: var(--color-paper);
  color: var(--color-ink);
  border-color: var(--color-paper);
}

.button.secondary {
  background-color: transparent;
  color: var(--color-ink);
}

.button.secondary:hover {
  background-color: var(--color-ink);
  color: var(--color-paper);
}

.button.inverted {
  background-color: var(--color-paper);
  color: var(--color-ink);
  border-color: var(--color-paper);
}

.button.inverted:hover {
  background-color: #eae9e4;
}

.button.ghost-light {
  background-color: transparent;
  color: var(--color-paper);
  border-color: rgba(255, 255, 255, 0.38);
}

.button.ghost-light:hover {
  background-color: var(--color-paper);
  color: var(--color-ink);
  border-color: var(--color-paper);
}

.header-cta {
  min-height: 44px;
  padding: 10px 24px;
  font-size: 14px;
  transition:
    opacity 0.28s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.28s cubic-bezier(0.16, 1, 0.3, 1),
    background-color 0.18s ease,
    color 0.18s ease;
}

.site-header.enhanced:not(.is-scrolled) .header-cta,
.site-header.enhanced.is-footer .header-cta {
  opacity: 0;
  pointer-events: none;
  transform: translateY(-6px);
}

.menu-button {
  display: none;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 600;
  color: inherit;
}

.citation {
  display: inline-flex;
  align-items: center;
  font-size: 12px;
  font-weight: 600;
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 3px;
  white-space: nowrap;
  vertical-align: baseline;
}

.hero-sticky-stage {
  position: sticky;
  top: 0;
  z-index: 1;
  min-height: 100vh;
  min-height: 100svh;
  padding-top: 104px;
  padding-bottom: 48px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background-color: var(--color-paper);
}

.hero-top-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: clamp(32px, 5vw, 72px);
  align-items: end;
  padding-bottom: clamp(28px, 4vw, 48px);
}

.hero-headline span {
  display: block;
}

.hero-lead-box {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 24px;
  padding-bottom: 6px;
}

.hero-intro {
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-ash);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
}

.hero-secondary-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 48px;
  padding: 10px 14px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-ink);
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: opacity 0.18s ease;
}

.hero-secondary-link:hover {
  opacity: 0.72;
}

.hero-media-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 21 / 9;
  min-height: 320px;
  max-height: 540px;
  border-radius: var(--radius-cards);
  overflow: hidden;
  background-color: var(--color-ink);
  border: 1px solid var(--color-ink);
}

.real-media-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  transform-origin: center center;
  will-change: transform;
}

/* Overlapping Main Surface Stack */
.overlapping-surface {
  position: relative;
  z-index: 10;
  background-color: var(--color-paper);
  border-top: 1px solid var(--color-ink);
}

.stat-strip {
  border-bottom: 1px solid var(--color-line);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  background-color: var(--color-paper);
}

.stat-tile {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 28px 24px;
  font-size: 15px;
  color: var(--color-ink);
}

.stat-tile:first-child {
  padding-left: 0;
}

.stat-tile:last-child {
  padding-right: 0;
}

.stat-tile + .stat-tile {
  border-left: 1px solid var(--color-line);
}

.stat-index {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 300;
  color: var(--color-ink);
  font-variant-numeric: tabular-nums;
}

.workflow-section {
  padding-block: clamp(72px, 9vw, 120px);
  background-color: var(--color-paper);
}

.workflow-header {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 32px;
  align-items: end;
  margin-bottom: clamp(40px, 5vw, 64px);
}

.workflow-header p {
  color: var(--color-ash);
  font-size: 16px;
  line-height: 1.6;
  justify-self: end;
  max-width: 44ch;
}

.workflow-cards-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--color-ink);
  border-bottom: 1px solid var(--color-line);
}

.workflow-card {
  display: flex;
  flex-direction: column;
  padding-block: 32px;
  padding-inline: 28px;
  background-color: var(--color-paper);
}

.workflow-card:first-child {
  padding-left: 0;
}

.workflow-card:last-child {
  padding-right: 0;
}

.workflow-card + .workflow-card {
  border-left: 1px solid var(--color-line);
}

.concept-photo-frame {
  width: 100%;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius-cards);
  overflow: hidden;
  background-color: var(--color-surface-soft);
  border: 1px solid var(--color-line);
  margin-bottom: 24px;
}

.concept-photo-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.workflow-card:hover .concept-photo-frame img {
  transform: scale(1.03);
}

.axis-spec-list {
  border-top: 1px solid var(--color-line);
  margin-bottom: 24px;
}

.axis-spec-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-block: 10px;
  border-bottom: 1px solid var(--color-line);
  font-size: 13px;
}

.axis-spec-row strong {
  font-weight: 600;
  color: var(--color-ink);
}

.axis-spec-row span {
  color: var(--color-ash);
  text-align: right;
}

.workflow-body {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.workflow-body p {
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-ash);
}

.blueprint-section {
  padding-block: clamp(72px, 8vw, 112px);
  border-top: 1px solid var(--color-ink);
  background-color: var(--color-paper);
}

.blueprint-editorial-flow {
  display: flex;
  flex-direction: column;
  gap: clamp(36px, 4.5vw, 56px);
}

.blueprint-header-row {
  max-width: 820px;
}

.blueprint-lead-text {
  margin-top: 16px;
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-ash);
}

.blueprint-principles-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.blueprint-principle-card {
  padding: 22px 24px;
  background-color: var(--color-surface-soft);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-cards);
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition:
    border-color 0.2s ease,
    transform 0.2s ease;
}

.blueprint-principle-card:hover {
  border-color: var(--color-ink);
}

.blueprint-principle-card h3 {
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 600;
  color: var(--color-ink);
}

.blueprint-principle-card p {
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--color-ash);
  margin: 0;
}

.feature-split-layout {
  display: grid;
  grid-template-columns: 0.85fr 1.45fr;
  gap: clamp(32px, 5vw, 64px);
  align-items: start;
}

.feature-left-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  position: sticky;
  top: 104px;
}

.feature-left-copy > p {
  margin-top: 20px;
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-ash);
}

.editorial-Point-list {
  width: 100%;
  margin-top: 32px;
  border-top: 1px solid var(--color-ink);
}

.editorial-point-item {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 12px;
  padding-block: 18px;
  border-bottom: 1px solid var(--color-line);
  align-items: baseline;
}

.point-num {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 300;
  color: var(--color-ash);
}

.editorial-point-item h3 {
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 4px;
}

.editorial-point-item p {
  font-size: 14px;
  line-height: 1.55;
  color: var(--color-ash);
}

/* Blueprint Stage: Direct, non-nested full-width workspace */
.blueprint-stage {
  background-color: var(--color-surface-soft);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-cards);
  overflow: hidden;
}

.workspace-control-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding: 16px clamp(20px, 3vw, 28px);
  background-color: var(--color-paper);
  border-bottom: 1px solid var(--color-line);
}

.control-bar-left {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

@keyframes ambient-compass-drift {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.control-bar-caption {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--color-ink);
}

.workspace-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.button-group {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 3px;
  border-radius: var(--radius-pill);
  background-color: var(--color-surface-soft);
  border: 1px solid var(--color-line);
}

.button-group button {
  min-height: 36px;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 500;
  color: var(--color-ash);
  transition:
    background-color 0.18s ease,
    color 0.18s ease;
}

.button-group button[aria-pressed="true"] {
  background-color: var(--color-ink);
  color: var(--color-paper);
}

.button-group button:hover:not([aria-pressed="true"]) {
  color: var(--color-ink);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1.28fr) minmax(320px, 1fr);
  gap: clamp(24px, 3vw, 36px);
  align-items: start;
  padding: clamp(20px, 3vw, 32px);
}

.blueprint-board {
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-paper);
  border: 1px solid var(--color-line);
  border-radius: 12px;
  padding: clamp(24px, 3.5vw, 40px);
}

.blueprint-board > svg {
  width: 100%;
  max-width: 440px;
  height: auto;
  margin-inline: auto;
  display: block;
}

.compass-lines {
  fill: none;
  stroke: var(--color-line);
  stroke-width: 1.2;
}

.compass-labels,
.fallback-labels {
  fill: var(--color-ash);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
}

.zone-control {
  cursor: pointer;
  transition: transform 0.36s cubic-bezier(0.16, 1, 0.3, 1);
}

.zone-control .zone-background {
  fill: var(--color-paper);
  stroke: var(--color-line);
  stroke-width: 1.2;
  transition:
    fill 0.18s ease,
    stroke 0.18s ease;
}

.zone-control:hover .zone-background {
  fill: #eceae3;
  stroke: var(--color-ink);
}

.zone-control:focus {
  outline: none;
}

.zone-control:focus-visible .zone-background {
  stroke: var(--color-ink);
  stroke-width: 2.5;
  stroke-dasharray: 5 3;
}

.zone-control[aria-pressed="true"] .zone-background {
  fill: var(--color-ink);
  stroke: var(--color-ink);
}

.zone-control text {
  fill: var(--color-ink);
  font-family: var(--font-body);
  pointer-events: none;
}

.zone-control[aria-pressed="true"] text {
  fill: var(--color-paper);
}

.zone-control .zone-label {
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 300;
}

.zone-control .selected-tick {
  display: none;
  font-size: 14px;
  font-weight: 700;
}

.zone-control[aria-pressed="true"] .selected-tick {
  display: block;
}

.zone-detail {
  min-width: 0;
  padding: clamp(24px, 3vw, 32px);
  border: 1px solid var(--color-line);
  border-radius: 12px;
  background-color: var(--color-paper);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: sticky;
  top: 96px;
  align-self: start;
  box-shadow: 0 4px 20px rgba(26, 26, 23, 0.04);
}

.detail-heading-wrap {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 12px;
}

.detail-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: var(--radius-pill);
  background-color: var(--color-surface-soft);
  color: var(--color-ash);
  border: 1px solid var(--color-line);
}

.zone-detail h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(28px, 3vw, 36px);
  font-weight: 300;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--color-ink);
}

.detail-description {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--color-ash);
  margin-top: 10px;
}

.detail-facts {
  margin-top: 20px;
  border-top: 1px solid var(--color-line);
}

.detail-fact-row {
  padding-block: 12px;
  border-bottom: 1px solid var(--color-line);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: baseline;
}

.detail-fact-row dt {
  font-size: 12.5px;
  color: var(--color-ash);
}

.detail-fact-row dd {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-ink);
  text-align: right;
}

.detail-sources {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--color-ash);
}

.detail-anchor {
  border-top: 1px solid var(--color-line);
  margin-top: 20px;
  padding-top: 14px;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-ink);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.workspace #list-view {
  min-width: 0;
}

.zone-list-title {
  font-size: 20px;
  margin-bottom: 14px;
}

.zone-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  list-style: none;
}

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

.zone-list li {
  padding: 14px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-cards);
  background-color: var(--color-surface-soft);
}

.zone-list li[aria-current="true"] {
  background-color: var(--color-ink);
  color: var(--color-paper);
  border-color: var(--color-ink);
}

.zone-list li p {
  font-size: 12px;
  line-height: 1.5;
  color: var(--color-ash);
}

.zone-list li[aria-current="true"] p,
.zone-list li[aria-current="true"] .list-position {
  color: rgba(255, 255, 255, 0.78);
}

.zone-list button {
  display: block;
  width: 100%;
  min-height: 40px;
  text-align: left;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 300;
}

.list-position {
  display: block;
  margin-top: 6px;
  font-size: 11px;
  color: var(--color-ash);
}

.orientation-section {
  position: relative;
  z-index: 12;
  background-color: var(--color-ink);
  color: var(--color-paper);
  padding-block: clamp(72px, 9vw, 120px);
}

.orientation-section :focus-visible {
  outline-color: var(--color-paper);
}

.ink-plate-top {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(32px, 5vw, 64px);
  align-items: start;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
}

.ink-plate-top p {
  color: rgba(255, 255, 255, 0.78);
  font-size: 16px;
  line-height: 1.65;
}

.topography-photo-frame {
  margin-top: 24px;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-cards);
  overflow: hidden;
  background-color: var(--color-ink-elevated);
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.topography-photo-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.comparison-area {
  display: grid;
  grid-template-columns: 1.45fr 0.85fr;
  gap: 32px;
  align-items: stretch;
  padding-top: 44px;
}

.orientation-comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.comparison-panel {
  padding: 24px;
  border-radius: var(--radius-cards);
  background-color: var(--color-ink-elevated);
  border: 1px solid rgba(255, 255, 255, 0.14);
}

.comparison-panel > p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.75);
  margin-top: 14px;
}

.mini-map {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 210px;
  margin-top: 16px;
  background-color: var(--color-ink);
  border-radius: var(--radius-cards);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.mini-grid {
  display: grid;
  grid-template-columns: repeat(3, 32px);
  grid-template-rows: repeat(3, 32px);
  gap: 4px;
}

.mini-grid i {
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 2px;
  background-color: #262622;
}

.mini-grid i:nth-child(3) {
  background-color: var(--color-paper);
  border-color: var(--color-paper);
}

.comparison-panel:nth-child(2) .mini-grid i:nth-child(3) {
  background-color: #262622;
  border-color: rgba(255, 255, 255, 0.35);
}

.comparison-panel:nth-child(2) .mini-grid i:nth-child(9) {
  background-color: var(--color-paper);
  border-color: var(--color-paper);
}

.mini-map > span {
  position: absolute;
  font-size: 11px;
  font-weight: 500;
}

.mini-north {
  top: 10px;
  right: 12px;
  color: rgba(255, 255, 255, 0.65);
}

.mini-top {
  top: 26px;
  left: 0;
  right: 0;
  text-align: center;
  font-weight: 600;
}

.mini-bottom {
  bottom: 24px;
  left: 0;
  right: 0;
  text-align: center;
  font-weight: 600;
}

.mini-east {
  right: 12px;
  bottom: 8px;
  color: rgba(255, 255, 255, 0.65);
}

.comparison-controls {
  padding: 28px;
  border-radius: var(--radius-cards);
  background-color: var(--color-ink-elevated);
  border: 1px solid rgba(255, 255, 255, 0.14);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
}

.comparison-controls > span {
  font-size: 14px;
  font-weight: 600;
}

.comparison-controls .text-link {
  color: var(--color-paper);
}

.measurement-surface {
  position: relative;
  z-index: 14;
  background-color: var(--color-paper);
  border-top: 1px solid var(--color-ink);
}

.measurement-section {
  padding-block: clamp(72px, 9vw, 120px);
}

.measure-split {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(32px, 5vw, 64px);
  align-items: start;
}

.measure-vitrine {
  background-color: var(--color-surface-soft);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-cards);
  padding: clamp(22px, 3vw, 36px);
}

.measure-explainer {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 24px;
  align-items: center;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-line);
}

.hasta-photo-frame {
  width: 100%;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius-cards);
  overflow: hidden;
  background-color: var(--color-ink);
  border: 1px solid var(--color-line);
}

.hasta-photo-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.measure-lab {
  padding-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.measure-inputs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.measure-inputs label {
  display: block;
  margin-bottom: 8px;
  font-size: 13px;
  font-weight: 600;
}

.unit-input,
.stepper {
  display: flex;
  align-items: center;
  height: 50px;
  border: 1px solid var(--color-ink);
  background-color: var(--color-paper);
  border-radius: var(--radius-cards);
  overflow: hidden;
}

.unit-input input,
.stepper input {
  width: 100%;
  min-width: 0;
  height: 48px;
  padding: 8px 14px;
  background: transparent;
  border: 0;
  font-size: 19px;
  font-weight: 600;
}

.unit-input input:focus,
.stepper input:focus {
  outline: none;
}

.unit-input:focus-within,
.stepper:focus-within {
  outline: 2px solid var(--color-ink);
  outline-offset: 2px;
}

.unit-input > span {
  padding-right: 14px;
  font-size: 13px;
  color: var(--color-ash);
}

.stepper input {
  padding-inline: 0;
  text-align: center;
}

.stepper button {
  min-width: 46px;
  height: 48px;
  font-size: 20px;
  font-weight: 500;
}

.stepper button:hover:not(:disabled) {
  background-color: var(--color-surface-soft);
}

.input-help {
  font-size: 12px;
  color: var(--color-ash);
  margin-top: 6px;
}

.error-message {
  margin-top: 8px;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-ink);
  padding: 8px 12px;
  border-radius: var(--radius-cards);
  border: 1px solid var(--color-ink);
  background-color: var(--color-surface-soft);
}

.calculation-card {
  background-color: var(--color-paper);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-cards);
  padding: 24px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.calculation-card .measure-result {
  font-family: var(--font-display);
  font-size: clamp(56px, 6.2vw, 88px);
  font-weight: 300;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.measure-result span {
  font-family: var(--font-body);
  font-size: 18px;
  font-weight: 500;
  color: var(--color-ash);
}

.measure-scale {
  width: 100%;
  height: auto;
  background-color: var(--color-paper);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-cards);
  padding: 12px 16px;
}

.measure-scale > path:first-of-type {
  stroke: var(--color-line);
}

#result-line {
  stroke: var(--color-ink);
  transition: d 0.25s ease;
}

.measure-scale text {
  font-family: var(--font-body);
  fill: var(--color-ash);
  font-size: 12px;
}

.sources-section {
  padding-block: clamp(64px, 8vw, 104px);
  border-top: 1px solid var(--color-ink);
}

.source-columns {
  display: grid;
  grid-template-columns: 0.9fr 1.3fr;
  gap: clamp(36px, 6vw, 80px);
  align-items: start;
}

.sources-sticky-copy {
  position: sticky;
  top: 104px;
  align-self: start;
}

details {
  border-block: 1px solid var(--color-line);
  margin-top: 24px;
  padding-block: 6px;
}

summary {
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

details p {
  padding-block: 10px 14px;
  font-size: 14px;
  color: var(--color-ash);
}

.reference-list {
  list-style: none;
}

.reference-list li {
  border-top: 1px solid var(--color-line);
  padding-block: 20px;
  scroll-margin-top: 100px;
}

.reference-list li > span {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-ash);
}

.reference-list li > a {
  display: block;
  margin-top: 6px;
  font-size: 17px;
  font-weight: 600;
  color: var(--color-ink);
}

.reference-list li > a:hover {
  text-decoration: underline;
}

.reference-list li > p {
  font-size: 14px;
  color: var(--color-ash);
  margin-top: 6px;
}

.site-footer {
  position: relative;
  z-index: 16;
  background-color: var(--color-ink);
  color: var(--color-paper);
  padding-top: clamp(64px, 8vw, 96px);
  padding-bottom: 48px;
}

.site-footer :focus-visible {
  outline-color: var(--color-paper);
}

.footer-top-cta {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: end;
  padding-bottom: 56px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.footer-brand {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-paper);
  display: inline-block;
  margin-bottom: 24px;
}

.footer-cta-box {
  justify-self: end;
  max-width: 360px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 20px;
}

.footer-cta-box p {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.78);
}

.footer-tools-cluster {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-tool-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 42px;
  padding: 8px 18px;
  border-radius: 6px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition:
    background-color 0.18s ease,
    border-color 0.18s ease,
    color 0.18s ease,
    transform 0.18s ease;
}

.footer-tool-btn.primary {
  background-color: var(--color-paper);
  color: var(--color-ink);
  border: 1px solid var(--color-paper);
}

.footer-tool-btn.primary:hover {
  background-color: #ebe9e1;
  border-color: #ebe9e1;
}

.footer-tool-btn.secondary {
  background-color: rgba(255, 255, 255, 0.08);
  color: var(--color-paper);
  border: 1px solid rgba(255, 255, 255, 0.24);
}

.footer-tool-btn.secondary:hover {
  background-color: rgba(255, 255, 255, 0.16);
  border-color: rgba(255, 255, 255, 0.42);
}

.footer-tool-btn svg {
  flex-shrink: 0;
}

.footer-summary-strip {
  padding-block: 36px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.footer-summary-strip dl {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.footer-summary-strip dt {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 6px;
}

.footer-summary-strip dd {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-paper);
}

.footer-columns {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding-block: 44px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.footer-col {
  padding-inline: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col:first-child {
  padding-left: 0;
}

.footer-col + .footer-col {
  border-left: 1px solid rgba(255, 255, 255, 0.14);
}

.footer-col h4 {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-paper);
  margin-bottom: 6px;
}

.footer-col a,
.footer-col span {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
}

.footer-col a:hover {
  color: var(--color-paper);
  text-decoration: underline;
}

.footer-bottom {
  padding-top: 28px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
}

.small {
  font-size: 13px;
  line-height: 1.55;
  color: var(--color-ash);
}

.context-note {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-ash);
}

.section-disclaimer {
  margin-top: 16px;
  font-size: 13px;
  color: var(--color-ash);
}

@media (max-width: 1024px) {
  .hero-sticky-stage {
    position: relative;
    min-height: auto;
  }

  .hero-top-grid,
  .workflow-header,
  .feature-split-layout,
  .ink-plate-top,
  .comparison-area,
  .measure-split,
  .source-columns,
  .footer-top-cta {
    grid-template-columns: 1fr;
  }

  .feature-left-copy,
  .sources-sticky-copy {
    position: static;
  }

  .workflow-header p,
  .footer-cta-box {
    justify-self: start;
  }

  .workflow-cards-grid {
    grid-template-columns: 1fr;
  }

  .workflow-card {
    padding-inline: 0;
  }

  .workflow-card + .workflow-card {
    border-left: 0;
    border-top: 1px solid var(--color-line);
  }

  .blueprint-principles-grid {
    grid-template-columns: 1fr;
  }

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

  .zone-detail {
    position: static;
  }
}

@media (max-width: 860px) {
  .header-inner {
    display: flex;
    justify-content: space-between;
  }

  .header-cta {
    display: none;
  }

  .site-header.enhanced .menu-button {
    display: inline-flex;
    z-index: 70;
  }

  .site-header.enhanced nav {
    position: fixed;
    inset: 0;
    z-index: 60;
    background-color: var(--color-paper);
    color: var(--color-ink);
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 18px;
    padding: 96px 28px 40px;
  }

  .site-header.enhanced nav:not(.open) {
    display: none;
  }

  .site-header.enhanced nav a {
    font-family: var(--font-display);
    font-size: clamp(36px, 8vw, 48px);
    font-weight: 300;
    line-height: 1.1;
    opacity: 1;
    border-bottom: 0;
  }

  .stat-strip {
    grid-template-columns: 1fr;
  }

  .stat-tile {
    padding-inline: 0;
  }

  .stat-tile + .stat-tile {
    border-left: 0;
    border-top: 1px solid var(--color-line);
  }

  .footer-columns {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .footer-col {
    padding-inline: 0;
  }

  .footer-col + .footer-col {
    border-left: 0;
  }
}

@media (max-width: 560px) {
  .orientation-comparison,
  .measure-explainer,
  .measure-inputs,
  .footer-summary-strip dl,
  .footer-columns,
  .workspace .zone-list,
  .zone-list {
    grid-template-columns: 1fr;
  }

  .hero-media-frame {
    aspect-ratio: 4 / 3;
    min-height: 240px;
  }
}

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

  .hero-sticky-stage {
    position: relative;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}

.concept-context { margin-top: 24px }
.zone-context { margin-top: 14px }
.orientation-note { margin-top: 18px }
.comparison-hint { font-size: 13px; color: rgba(255, 255, 255, 0.7); margin-top: 6px; }
.measurement-intro { font-size: 14px; color: var(--color-ink) }
.measurement-privacy { margin-top: 10px }
.measurement-equation { font-size: 16px; font-weight: 600; margin-top: 4px }
.measurement-fallback { margin-top: 20px }
.section-note { margin-top: 16px }
.sources-intro { font-size: 16px; line-height: 1.65; margin-top: clamp(20px, 2.5vw, 28px) }
.footer-note { color: rgba(255, 255, 255, 0.75) }
button, .segmented button { min-height: 44px; }
.reference-list a, .citation { text-underline-offset: .2em; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero-sticky-stage { position: relative; }
}