.home-hero {
  display: grid;
  grid-template-columns: 1fr 0.92fr;
  min-height: calc(100svh - var(--header-height));
  overflow: hidden;
}

.home-hero-copy {
  display: flex;
  flex-direction: column;
  padding: var(--space-8) var(--page-gutter) var(--space-12);
}

.home-hero-copy h1 {
  font-size: clamp(3.6rem, 6.7vw, 8.4rem);
  font-weight: 410;
  letter-spacing: var(--tracking-display);
  line-height: 0.91;
  margin: auto 0;
}

.home-hero-copy > div:last-child {
  align-items: end;
  display: flex;
  justify-content: space-between;
}

.home-hero-copy p {
  line-height: var(--leading-body);
  margin: 0;
  max-width: 28rem;
}

.specimen-visual {
  background: #eceae4;
  min-height: calc(100svh - var(--header-height));
  overflow: hidden;
  position: relative;
}

.specimen-visual img {
  height: 100%;
  object-fit: cover;
  object-position: 62% center;
  width: 100%;
}

.specimen-label {
  bottom: var(--space-6);
  color: var(--color-accent);
  left: var(--space-6);
  position: absolute;
}

.home-hero.knowledge-hero {
  display: block;
  min-height: calc(100svh - var(--header-height));
  overflow: hidden;
  position: relative;
}

.knowledge-hero-copy {
  display: flex;
  flex-direction: column;
  min-height: calc(100svh - var(--header-height));
  padding: var(--space-8) var(--page-gutter) var(--space-12);
  position: relative;
  z-index: 5;
}

.knowledge-stage-message {
  display: grid;
  font-size: clamp(1.45rem, 2.05vw, 2.25rem);
  font-weight: 400;
  gap: clamp(0.3rem, 0.6vw, 0.55rem);
  letter-spacing: -0.025em;
  line-break: strict;
  line-height: 1.2;
  margin-bottom: 0;
  margin-top: auto;
  max-width: 76rem;
  align-self: flex-end;
  text-align: right;
}

.knowledge-stage-line,
.knowledge-stage-final {
  display: block;
  opacity: 0;
  transform: translateY(0.4rem);
  transition: opacity 1000ms linear, transform 1000ms var(--ease);
  visibility: hidden;
}

.knowledge-stage-line.is-revealed,
.knowledge-stage-final.is-revealed {
  opacity: 1;
  transform: translateY(0);
  visibility: visible;
}

.knowledge-stage-final {
  color: var(--color-muted);
}

.knowledge-hero-index {
  align-self: flex-end;
  color: var(--color-muted);
  margin: clamp(1rem, 2vw, 2rem) 0 0;
  text-align: right;
}

.scope-map,
.question-pairs,
.case-list {
  margin-left: 23%;
  margin-top: clamp(5rem, 9vw, 9rem);
}

.scope-map {
  border-top: 1px solid var(--color-ink);
  padding-top: var(--space-4);
}

.scope-domains {
  color: var(--color-muted);
}

.scope-continuum,
.case-study ol {
  display: flex;
  list-style: none;
  margin: var(--space-24) 0;
  padding: 0;
}

.scope-continuum li,
.case-study li {
  align-items: center;
  display: flex;
  flex: 1;
  font-size: var(--text-small);
  gap: var(--space-3);
}

.scope-continuum li:not(:last-child)::after,
.case-study li:not(:last-child)::after {
  background: var(--color-line);
  content: "";
  flex: 1;
  height: 1px;
}

/* The wide, distant counterpart to OUR PERSPECTIVE's close-up figure —
   right-anchored (mirroring that section's left anchor) and letterboxed
   rather than the earlier tall crop, so the two read as one editorial rhythm
   without repeating the same template. */
.scope-visual {
  margin-left: auto;
  margin-top: clamp(1rem, 3vw, 2rem);
  width: clamp(32rem, 44vw, 44rem);
}

.scope-visual img {
  filter: grayscale(1) contrast(0.93);
  height: clamp(14rem, 16vw, 18rem);
  object-fit: cover;
  object-position: 50% 62%;
  width: 100%;
}

.scope-visual figcaption {
  margin-top: var(--space-3);
}

.scope-note {
  color: var(--color-muted);
  line-height: var(--leading-body);
  margin: clamp(3rem, 6vw, 5rem) 0 0;
  max-width: 26rem;
}

/* ============================================================================
   02 FIELD OF VIEW — SCALE OF OBSERVATION (Phase 5 / 5.1 / 5.2).
   Static SVG. One observation point; four partial-arc ranges (MICRO / OBJECT /
   SYSTEM / MARKET) read from the centre outward = "the same subject seen from a
   different distance", NOT a process / flow / network. Reuses the existing
   type / rule / caption system.
   Phase 5.2: field-of-view.js adds a FOCUS FIELD — information far from
   OBSERVATION sits at a lowered contrast by default and is lifted back inside a
   soft, edgeless field around the pointer. Opacity is the only property touched
   (no layout shift, no glow, no spotlight graphic). Desktop pointer only; the
   static figure is unchanged on touch / no-hover and with JS disabled.
   ========================================================================== */
/* Give the heading the whole width beside the label so the second authored line
   ("問題のすべてとは限らない。") stays on one line — no "い。" orphan. */
#research .section-header {
  grid-template-columns: 23% minmax(0, 1fr);
}

.observation-figure {
  margin: clamp(3rem, 6vw, 6rem) 0 0;
}

.observation-figure__index {
  border-top: 1px solid var(--color-ink);
  color: var(--color-muted);
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.75rem;
  margin: 0;
  padding-top: var(--space-4);
}
.observation-figure__index span:first-child {
  color: var(--color-ink);
}

.observation-figure__plate {
  margin-top: clamp(0.5rem, 1.5vw, 1.25rem);
  width: 100%;
}

/* Phase 1.2 PERCEPTION FIELD — the "paper fog".
   No dark haze, no spotlight. Every label / arc carries a baked opacity in the
   markup that follows a recognition-cliff falloff from the OBSERVATION centre;
   far ranges keep only a 2-5% trace. field-of-view.js lifts that contrast
   locally around the pointer (no glow / halo / lens). The only painted field is
   a static, barely-there warm tone at the centre (<ellipse class="ov-field">),
   which is never pointer-reactive — it just says "an observed area is here". */
.ov-field {
  pointer-events: none;
}

.ov {
  display: block;
  height: auto;
  width: 100%;
}
.ov--mobile {
  display: none;
}

.ov-arc {
  fill: none;
  stroke: var(--color-line);
  stroke-width: 1;
}
.ov-arc--open {
  stroke-dasharray: 190 40 150 48 240 44;
}
.ov-bracket {
  fill: none;
  stroke: var(--color-muted);
  stroke-width: 1;
}
.ov-point {
  fill: var(--color-ink);
}
.ov-cross {
  stroke: var(--color-ink);
  stroke-width: 1;
}

.ov-scale {
  fill: var(--color-ink);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.14em;
}
.ov-scale--faint {
  fill: var(--color-muted);
  letter-spacing: 0.1em;
}
.ov-originlabel {
  fill: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
}
.ov-word {
  fill: var(--color-ink);
  font-family: var(--font-sans);
  font-size: 13.5px;
  letter-spacing: 0.02em;
}

/* Phase 1.2 PERCEPTION FIELD — smooth the contrast recovery between pointer
   updates. field-of-view.js shifts each text element's fill (muted -> ink) and
   its opacity together; arcs use opacity only. Inert when the script is not
   running (the baked authored opacity is the resting state). */
.ov-word,
.ov-scale,
.ov-arc,
.ov-bracket,
.ov-originlabel,
.ov-cross,
.ov-point {
  transition: opacity 170ms linear, fill 170ms linear;
}
@media (prefers-reduced-motion: reduce) {
  .ov-word,
  .ov-scale,
  .ov-arc,
  .ov-bracket,
  .ov-originlabel,
  .ov-cross,
  .ov-point {
    transition: none;
  }
}

.observation-figure__caption {
  color: var(--color-muted);
  font-size: var(--text-small);
  line-height: var(--leading-body);
  margin-top: clamp(1.5rem, 3vw, 2.5rem);
  max-width: 40rem;
}
.observation-figure__caption .mono {
  color: var(--color-ink);
}

@media (max-width: 48rem) {
  .ov--desktop {
    display: none;
  }
  .ov--mobile {
    display: block;
  }
  .observation-figure__index {
    font-size: 0.62rem;
    gap: 0.3rem 1rem;
  }
  .ov-word {
    font-size: 12px;
  }
  .ov-scale {
    font-size: 11px;
    letter-spacing: 0.08em;
  }
}

.question-pairs {
  border-top: var(--border-dark);
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.question-pairs article {
  min-height: 27rem;
  padding: var(--space-6);
}

.question-pairs article:first-child {
  border-right: var(--border-dark);
}

.question-pairs h3 {
  font-size: clamp(1.8rem, 2.7vw, 3.3rem);
  font-weight: 410;
  letter-spacing: var(--tracking-heading);
  line-height: 1.2;
  margin: var(--space-24) 0 var(--space-8);
}

.question-pairs article > p:last-child {
  color: #a7aca7;
  line-height: var(--leading-body);
  max-width: 30rem;
}

/* ============================================================================
   YOUR QUESTION — the WE -> YOU turn on the dark band. One linear read:
   main copy (h2) -> symptoms (explanation, recedes) -> the turn -> method
   (explanation) -> the closing line, given room to land. Reuses the dark
   tokens and .section-header; no new animation, no CTA.
   Hierarchy: h2 > __turn > __close > __symptoms / __method.
   ========================================================================== */
.question-flow {
  margin-left: 23%;
  margin-top: clamp(3rem, 6vw, 5rem);
  max-width: 46rem;
  text-wrap: pretty;
}

.question-flow__symptoms {
  border-top: var(--border-dark);
  list-style: none;
  margin: 0;
  padding: var(--space-6) 0 0;
}

.question-flow__symptoms li {
  font-size: clamp(0.9rem, 1vw, 1.05rem);
  line-height: var(--leading-body);
  padding-block: 0.4rem;
}

.question-flow__turn {
  font-size: clamp(1.35rem, 2.1vw, 2.05rem);
  font-weight: 440;
  letter-spacing: var(--tracking-heading);
  line-height: 1.35;
  margin: clamp(2.75rem, 5.5vw, 4.5rem) 0 0;
  text-wrap: balance;
}

.question-flow__method {
  font-size: clamp(0.92rem, 1.05vw, 1.1rem);
  line-height: var(--leading-body);
  margin: var(--space-6) 0 0;
}

.question-flow__close {
  font-size: clamp(1.15rem, 1.7vw, 1.6rem);
  font-weight: 400;
  letter-spacing: var(--tracking-heading);
  line-height: 1.4;
  margin: clamp(3.5rem, 7vw, 6rem) 0 0;
}

/* Conversion point: the consultation link lives inside YOUR QUESTION now, not
   in a separate band. Quiet outlined control on the dark section — findable,
   but it must not out-weigh __close. */
.question-flow__cta {
  align-items: center;
  border: 1px solid var(--color-dark-line);
  color: var(--color-on-dark);
  display: inline-flex;
  font-size: 0.9rem;
  gap: 2.5rem;
  justify-content: space-between;
  margin-top: clamp(2.5rem, 5vw, 4rem);
  min-width: 12.5rem;
  padding: 0.95rem 1.3rem;
  transition:
    background var(--duration-fast) var(--ease),
    border-color var(--duration-fast) var(--ease),
    color var(--duration-fast) var(--ease);
}

.question-flow__cta:hover {
  background: var(--color-on-dark);
  border-color: var(--color-on-dark);
  color: var(--color-dark);
}

.question-flow__cta span {
  font-size: 1.1em;
}

@media (max-width: 45rem) {
  .question-flow {
    margin-left: 0;
    max-width: none;
  }
  .question-flow__turn {
    font-size: 1.3rem;
  }
  .question-flow__close {
    font-size: 1.15rem;
  }
  .question-flow__cta {
    max-width: 20rem;
    width: 100%;
  }
}

.case-list {
  border-top: 1px solid var(--color-ink);
}

.case-study {
  border-bottom: var(--border);
  display: grid;
  gap: var(--space-8);
  grid-template-columns: 0.8fr 1.2fr auto;
  padding: var(--space-8) 0;
}

.case-study h3 {
  font-size: clamp(1.5rem, 1.95vw, 2.2rem);
  font-weight: 420;
  letter-spacing: var(--tracking-heading);
  line-height: 1.18;
  margin: var(--space-16) 0 0;
  white-space: nowrap;
}

.case-study ol {
  align-self: center;
  grid-column: 2 / -1;
  margin: 0;
}

.case-study > p {
  color: var(--color-muted);
  line-height: var(--leading-body);
  margin: 0;
  max-width: 35rem;
}

.case-study > a {
  align-items: center;
  border: var(--border);
  border-radius: 50%;
  display: flex;
  height: 2.75rem;
  justify-content: center;
  width: 2.75rem;
}

.home-manifesto,
.page-section,
.detail-section {
  padding-block: var(--section-space);
}

.home-manifesto {
  display: grid;
  grid-template-columns: 23% 1fr;
}

/* An editorial spread, not a text grid: heading top-left, photo as the
   visual anchor, follow-up copy tucked into the margin at its lower-right —
   the eye moves heading -> photo -> follow-up on a diagonal. */
.manifesto-copy {
  column-gap: clamp(1.5rem, 4vw, 3rem);
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  row-gap: clamp(2rem, 5vw, 4rem);
}

/* Same type scale as the numbered section headings (.section-header h2). */
.manifesto-heading {
  font-size: var(--text-section);
  font-weight: 400;
  grid-column: 1 / -1;
  letter-spacing: -0.025em;
  line-height: 1.12;
  max-width: none;
}

.manifesto-visual {
  grid-column: 1;
  justify-self: start;
  width: clamp(34rem, 47vw, 46rem);
}

.manifesto-visual img {
  filter: grayscale(1) contrast(0.93);
  height: clamp(24rem, 26vw, 30rem);
  object-fit: cover;
  width: 100%;
}

.manifesto-visual figcaption {
  margin-top: var(--space-3);
}

.manifesto-followup {
  align-self: end;
  grid-column: 2;
}

.manifesto-followup-lead {
  font-size: clamp(0.95rem, 1.15vw, 1.2rem);
  letter-spacing: -0.03em;
  line-height: 1.55;
}

.manifesto-followup-strong {
  font-size: clamp(1rem, 1.25vw, 1.3rem);
  font-weight: 480;
  letter-spacing: -0.03em;
  line-height: 1.5;
  margin-top: var(--space-4);
}

.split-feature {
  border-top: 1px solid var(--color-ink);
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  margin-left: 23%;
  margin-top: clamp(5rem, 9vw, 9rem);
  padding-top: var(--space-4);
}

.split-feature figure img {
  filter: grayscale(1) contrast(0.93);
  height: 43rem;
  object-fit: cover;
}

.split-copy {
  display: flex;
  flex-direction: column;
  padding-left: clamp(2rem, 5vw, 5rem);
}

.split-copy h3 {
  font-size: var(--text-card);
  font-weight: 420;
  letter-spacing: var(--tracking-heading);
  line-height: 1.13;
  margin: auto 0 var(--space-8);
}

.split-copy > p:not(.mono) {
  color: var(--color-muted);
  line-height: var(--leading-body);
  margin-bottom: var(--space-12);
}

.timeline {
  border-top: var(--border);
  margin-left: 23%;
  margin-top: var(--space-32);
}

.timeline-item {
  border-bottom: var(--border);
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 12% 1fr 1fr;
  padding: var(--space-8) 0;
}

.timeline-item h3 {
  font-size: clamp(1.6rem, 2.4vw, 2.8rem);
  font-weight: 420;
  letter-spacing: var(--tracking-heading);
  margin: 0;
}

.timeline-item p {
  color: var(--color-muted);
  line-height: var(--leading-body);
  margin: 0;
}

.journal-grid {
  border-top: 1px solid var(--color-ink);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: var(--space-24);
}

.journal-card {
  border-bottom: var(--border);
  border-right: var(--border);
  display: flex;
  flex-direction: column;
  min-height: 28rem;
  padding: var(--space-6);
}

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

.journal-card h2 {
  font-size: clamp(1.65rem, 2.2vw, 2.65rem);
  font-weight: 420;
  letter-spacing: var(--tracking-heading);
  line-height: 1.3;
  margin: auto 0 var(--space-6);
}

.journal-card p {
  color: var(--color-muted);
  line-height: var(--leading-body);
}

.journal-card a {
  border-top: var(--border);
  font-size: var(--text-small);
  margin-top: var(--space-6);
  padding-top: var(--space-4);
}

.detail-hero {
  display: grid;
  gap: var(--space-8);
  grid-template-columns: 23% 1fr;
  min-height: 75svh;
  padding-bottom: var(--space-16);
  padding-top: var(--space-8);
}

.detail-hero-main {
  display: flex;
  flex-direction: column;
}

.detail-hero h1 {
  font-size: var(--text-page-title);
  font-weight: 410;
  letter-spacing: var(--tracking-display);
  line-height: 0.95;
  margin: auto 0 var(--space-16);
  max-width: 12ch;
}

.detail-lead {
  display: grid;
  gap: var(--space-16);
  grid-template-columns: 1fr 1fr;
}

.detail-lead p {
  font-size: var(--text-lead);
  letter-spacing: -0.035em;
  line-height: 1.5;
}

.detail-grid {
  display: grid;
  gap: var(--space-24);
  grid-template-columns: 23% 1fr;
}

.detail-grid h2 {
  font-size: clamp(2rem, 3.4vw, 4rem);
  font-weight: 420;
  letter-spacing: var(--tracking-heading);
  line-height: 1.12;
}

.detail-grid + .detail-grid {
  border-top: var(--border);
  margin-top: var(--space-24);
  padding-top: var(--space-24);
}

.contact-grid {
  border-top: 1px solid var(--color-ink);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  margin-top: var(--space-24);
}

.contact-option {
  border-bottom: var(--border);
  min-height: 18rem;
  padding: var(--space-6);
}

.contact-option:nth-child(odd) {
  border-right: var(--border);
}

.contact-option h2 {
  font-size: clamp(1.8rem, 2.8vw, 3.3rem);
  font-weight: 420;
  letter-spacing: var(--tracking-heading);
  margin: var(--space-16) 0 var(--space-6);
}

.contact-option p {
  color: var(--color-muted);
  line-height: var(--leading-body);
}

/* ============================================================================
   01 KNOWLEDGE NETWORK — Phase 3 static figure.
   Markup generated from the Phase 2 PUBLIC VIEW by knowledge/figure/build-figure.mjs.
   A research-journal plate: EN mono notation in the left margin, JP meaning on the
   plate itself, one JP caption below. USOHONTO palette only — no colour coding of
   domains, no accent. Points + hairlines hold HERO's dot DNA, held static.
   ========================================================================== */
.knowledge-figure {
  border-top: 1px solid var(--color-ink);
  column-gap: clamp(1.5rem, 4vw, 3.5rem);
  display: grid;
  grid-template-columns: minmax(9rem, 18%) minmax(0, 1fr);
  margin-top: clamp(4rem, 8vw, 8rem);
  padding-top: var(--space-6);
  row-gap: var(--space-8);
}

.knowledge-figure__meta {
  color: var(--color-muted);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  line-height: 1.5;
}

.knowledge-figure__fig {
  color: var(--color-ink);
  margin: 0;
}

.knowledge-figure__fig-title {
  margin: -0.4rem 0 0;
}

.knowledge-figure__stats {
  display: grid;
  gap: 0.35rem;
  margin: 0;
}

.knowledge-figure__stats div {
  border-bottom: 1px solid var(--color-line);
  display: flex;
  gap: var(--space-4);
  justify-content: space-between;
  padding-bottom: 0.3rem;
}

.knowledge-figure__stats dt {
  margin: 0;
}

.knowledge-figure__stats dd {
  color: var(--color-ink);
  margin: 0;
}

.knowledge-figure__key {
  display: grid;
  gap: 0.4rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.knowledge-figure__key li {
  align-items: center;
  display: flex;
  gap: var(--space-3);
}

.kf-key {
  display: inline-block;
  flex: none;
  height: 9px;
  width: 9px;
}

.kf-key--node {
  background: var(--color-ink);
  border-radius: 50%;
}

.kf-key--abstract {
  border: 1px dotted var(--color-muted);
  border-radius: 50%;
}

.kf-key--restricted {
  border: 1px solid var(--color-muted);
  border-radius: 50%;
}

.knowledge-figure__src {
  margin: 0;
}

.knowledge-figure__plate {
  overflow: hidden; /* hard crop — some lines and nodes run past the frame on purpose */
}

.knowledge-figure svg.kf {
  display: block;
  height: auto;
  width: 100%;
}

.knowledge-figure svg.kf--desktop {
  max-height: 76vh;
}

.knowledge-figure svg.kf--mobile {
  display: none;
}

.kf-field {
  fill: var(--color-soft);
  opacity: 0.16;
}

.kf-region {
  fill: var(--color-soft);
  opacity: 0.28;
}

.kf-region--cap {
  fill: none;
  opacity: 0.28;
  stroke: var(--color-soft);
  stroke-linecap: round;
}

.kf-domain {
  fill: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  opacity: 0.75;
}

.kf-domain-jp {
  font-size: 9px;
  letter-spacing: 0.04em;
  opacity: 0.85;
}

.kf-domain--faint {
  font-size: 9px;
  opacity: 0.4;
}

.kf-edge {
  fill: none;
}

.kf-edge--secondary {
  opacity: 0.42;
  stroke: var(--color-muted);
  stroke-width: 0.7;
}

.kf-edge--primary {
  opacity: 0.9;
  stroke: var(--color-ink);
  stroke-width: 1.05;
}

.kf-stub {
  opacity: 0.75;
  stroke: var(--color-line);
  stroke-dasharray: 2 3.5;
  stroke-width: 0.7;
}

.kf-dot {
  fill: var(--color-ink);
}

.kf-node--secondary .kf-dot {
  opacity: 0.72;
}

.kf-node--restricted .kf-dot {
  fill: none;
  stroke: var(--color-muted);
  stroke-width: 1;
}

.kf-dot--ring {
  fill: none;
  stroke: var(--color-muted);
  stroke-dasharray: 1.4 2;
  stroke-width: 1;
}

.kf-dot--core {
  fill: var(--color-muted);
}

.kf-label {
  fill: var(--color-ink);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
}

.kf-node--secondary .kf-label {
  fill: var(--color-muted);
  font-size: 10.5px;
  opacity: 0.4;
}

.kf-node--abstract .kf-label {
  fill: var(--color-muted);
  font-size: 11.5px;
}

.kf-node--restricted .kf-label {
  fill: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
}

/* Phase 3 permits ONE interaction: a pure-CSS readability aid on hover / focus. */
@media (hover: hover) {
  .kf-node:hover .kf-label {
    fill: var(--color-ink);
    opacity: 1;
    paint-order: stroke;
    stroke: var(--color-paper);
    stroke-width: 3px;
  }

  .kf-node:hover .kf-dot {
    opacity: 1;
  }
}

.kf-node:focus,
.kf-node:focus-within {
  outline: none;
}

/* SVG <g> reflects focus through :focus-within more reliably than :focus */
.kf-node:focus-within .kf-label {
  fill: var(--color-ink);
  opacity: 1;
  paint-order: stroke;
  stroke: var(--color-paper);
  stroke-width: 3px;
}

.kf-node:focus-within .kf-dot {
  opacity: 1;
}

.kf-anno {
  fill: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 8.5px;
  letter-spacing: 0.1em;
  opacity: 0.85;
}

.knowledge-figure__caption {
  color: var(--color-muted);
  grid-column: 2;
  line-height: var(--leading-body);
  max-width: 40rem;
}

.knowledge-figure__caption .mono {
  color: var(--color-ink);
}

.knowledge-figure__closing {
  color: var(--color-ink);
  display: block;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  margin-top: var(--space-4);
}

/* Phase 6G — the four statements are single lines. Same left/right relationship
   as 01 FIELD OF VIEW: the label sits in the left column, the copy in the column
   to its right (starting at 23%), each line left-aligned:
     02 KNOWLEDGE NETWORK        知識だけでは、つながらない。
                                生物、化学から始まり、…
                                調べる。試す。…
                                知を、経験で紡ぐ。   <- directly under line 3;
                                                     never reaching the globe.
   Only layout (position + vertical spacing) changes; copy text, the Sphere
   renderer, its size / camera / drag / data are all untouched. */
#knowledge-network {
  padding-top: clamp(4rem, 6.5vw, 6.5rem);
}

/* label 23% (same as the default section grid) — h2 gets the whole rest so the
   single line has room. */
#knowledge-network .section-header {
  grid-template-columns: 23% minmax(0, 1fr);
}

.kn-intro {
  margin-left: 23%;
  margin-top: clamp(0.9rem, 1.8vw, 1.5rem);
  max-width: none;
  text-wrap: pretty;
}

.kn-lead {
  color: var(--color-ink);
  font-size: clamp(1rem, 1.3vw, 1.35rem);
  letter-spacing: -0.02em;
  line-height: 1.7;
  margin: 0;
}

.kn-note {
  color: var(--color-muted);
  font-size: clamp(0.92rem, 1vw, 1.05rem);
  line-height: var(--leading-body);
  margin: clamp(0.4rem, 1vw, 0.75rem) 0 0;
}

.kn-close {
  color: var(--color-ink);
  font-size: clamp(1.4rem, 2.1vw, 2rem);
  font-weight: 440;
  letter-spacing: var(--tracking-heading);
  line-height: 1.4;
  margin: clamp(1rem, 2.2vw, 1.7rem) 0 0;
}

/* desktop only: keep each statement on one visual line */
@media (min-width: 45.0625rem) {
  #knowledge-network .section-header h2,
  .kn-lead,
  .kn-note,
  .kn-close {
    white-space: nowrap;
  }
}

@media (max-width: 45rem) {
  #research .section-header,
  #knowledge-network .section-header {
    grid-template-columns: 1fr;
  }
  #knowledge-network .section-header h2 {
    white-space: normal;
    text-wrap: balance;
  }
  .kn-intro {
    margin-left: 0;
    max-width: none;
  }
  .kn-lead,
  .kn-note,
  .kn-close {
    white-space: normal;
  }
  .kn-close {
    font-size: 1.35rem;
  }
}

/* ============================================================================
   01 KNOWLEDGE NETWORK — Knowledge World (Phase 4.2).
   A Canvas 2D renderer draws a huge Knowledge Sphere; the Phase 3.1 static
   figure stays in the DOM as the fallback / regression asset.
   Progressive enhancement: no JS (or init failure) -> the static figure shows.
   No sticky, no scroll track, no wheel handling — normal document flow.
   ========================================================================== */
/* full-bleed clip point: `overflow-x: clip` on <main> keeps the 100vw Knowledge
   World from ever adding a horizontal scrollbar to the document, WITHOUT turning
   <main> into a scroll container (so window scroll + anchors are untouched). */
main {
  overflow-x: clip;
}

.knowledge-world {
  position: relative;
  /* full-bleed: the surface must overflow the viewport, never sit as a neat
     framed globe. It is clipped by `main { overflow-x: clip }` above and by its
     own `overflow: hidden`. */
  width: 100vw;
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
  overflow: hidden;
  margin-top: var(--space-6);
}
.knowledge-world.knowledge-world--on {
  min-height: clamp(30rem, 76vh, 52rem);
}
/* fallback / no-JS: keep the Phase 3.1 figure at a readable width inside the
   full-bleed wrapper */
.knowledge-world .knowledge-figure {
  max-width: 62rem;
  margin-inline: auto;
  padding-inline: var(--space-4);
}

.knowledge-world__canvas {
  display: block;
  width: 100%;
  height: 100%;
  min-height: inherit;
  cursor: grab;
  touch-action: pan-y; /* vertical page scroll stays native; drag intent is decided in JS */
  background: transparent; /* the section's beige shows straight through — no canvas frame (§16) */
}
.knowledge-world__canvas:active {
  cursor: grabbing;
}

.knowledge-world__meta {
  position: absolute;
  right: max(var(--space-4), calc(50vw - 50% + var(--space-4)));
  bottom: var(--space-4);
  margin: 0;
  color: var(--color-muted);
  text-align: right;
  pointer-events: none;
}
.knowledge-world__hint {
  position: absolute;
  left: max(var(--space-4), calc(50vw - 50% + var(--space-4)));
  bottom: var(--space-4);
  margin: 0;
  color: var(--color-muted);
  opacity: 0.7;
  pointer-events: none;
}

/* default = static figure visible, canvas hidden. JS success flips it. */
.knowledge-world__canvas,
.knowledge-world__meta,
.knowledge-world__hint {
  display: none;
}
.knowledge-world.knowledge-world--on .knowledge-world__canvas,
.knowledge-world.knowledge-world--on .knowledge-world__meta,
.knowledge-world.knowledge-world--on .knowledge-world__hint {
  display: block;
}
.knowledge-world.knowledge-world--on .knowledge-figure {
  display: none;
}
/* explicit fallback state (init failed) — identical to the default, kept for clarity */
.knowledge-world.knowledge-world--fallback .knowledge-world__canvas {
  display: none;
}
.knowledge-world.knowledge-world--fallback .knowledge-figure {
  display: grid;
}

@media (prefers-reduced-motion: reduce) {
  .knowledge-world__canvas {
    cursor: default;
  }
}

@media (max-width: 62rem) {
  .home-hero {
    grid-template-columns: 1fr;
  }

  .home-hero-copy,
  .specimen-visual {
    min-height: 78svh;
  }

  .home-manifesto {
    grid-template-columns: 1fr;
  }

  .manifesto-copy {
    margin-top: var(--space-16);
  }

  .split-feature,
  .timeline {
    margin-left: 22%;
  }

  .scope-map,
  .question-pairs,
  .case-list {
    margin-left: 22%;
  }

  .knowledge-figure {
    grid-template-columns: minmax(8rem, 20%) minmax(0, 1fr);
  }

  .case-study {
    grid-template-columns: 1fr auto;
  }

  .case-study ol {
    grid-column: 1 / -1;
    grid-row: auto;
  }
}

@media (max-width: 45rem) {
  .knowledge-hero-copy {
    min-height: calc(100svh - var(--header-height));
    padding: var(--space-6) var(--page-gutter) var(--space-8);
  }

  .knowledge-stage-message {
    font-size: clamp(1.05rem, 4.8vw, 1.3rem);
    gap: clamp(0.25rem, 1.2vw, 0.5rem);
    line-height: 1.28;
    margin-bottom: 0;
    margin-top: auto;
  }

  .knowledge-hero-index {
    max-width: 24rem;
  }

  .home-hero-copy h1 {
    font-size: clamp(3rem, 14vw, 5.4rem);
  }

  .home-hero-copy > div:last-child {
    align-items: start;
    flex-direction: column;
    gap: var(--space-8);
  }

  .specimen-visual {
    min-height: 62svh;
  }

  .manifesto-copy,
  .split-feature,
  .detail-lead {
    grid-template-columns: 1fr;
  }

  .split-feature,
  .timeline {
    margin-left: 0;
  }

  .manifesto-heading,
  .manifesto-visual,
  .manifesto-followup {
    grid-column: 1;
  }

  /* match .section-header h2 at this breakpoint */
  .manifesto-heading {
    font-size: 2rem;
    line-height: 1.12;
  }

  .manifesto-followup {
    align-self: auto;
  }

  .manifesto-visual {
    width: 100%;
  }

  .manifesto-visual img {
    height: 16rem;
  }

  .scope-visual {
    margin-left: 0;
    width: 100%;
  }

  .scope-visual img {
    height: 14rem;
  }

  .scope-map,
  .question-pairs,
  .case-list {
    margin-left: 0;
  }

  .knowledge-figure {
    grid-template-columns: 1fr;
    row-gap: var(--space-6);
  }

  .knowledge-figure__meta {
    display: grid;
    gap: var(--space-4) var(--space-6);
    grid-template-columns: 1fr 1fr;
  }

  .knowledge-figure__fig,
  .knowledge-figure__fig-title,
  .knowledge-figure__src {
    grid-column: 1 / -1;
  }

  .knowledge-figure svg.kf--desktop {
    display: none;
  }

  .knowledge-figure svg.kf--mobile {
    display: block;
    max-height: none;
  }

  .kf-label {
    font-size: 15px;
  }

  .kf-node--restricted .kf-label {
    font-size: 12px;
  }

  .kf-domain {
    font-size: 11px;
  }

  .kf-edge--secondary {
    opacity: 0.3;
  }

  .knowledge-figure__caption {
    grid-column: 1;
  }

  .scope-continuum,
  .case-study ol {
    align-items: flex-start;
    flex-direction: column;
    gap: 0;
  }

  .scope-continuum li,
  .case-study li {
    border-bottom: var(--border);
    min-height: 3.5rem;
    width: 100%;
  }

  .scope-continuum li::after,
  .case-study li::after {
    display: none;
  }

  .question-pairs {
    grid-template-columns: 1fr;
  }

  .question-pairs article {
    min-height: 23rem;
    padding-inline: 0;
  }

  .question-pairs article:first-child {
    border-bottom: var(--border-dark);
    border-right: 0;
  }

  .case-study {
    grid-template-columns: 1fr auto;
  }

  .case-study > div,
  .case-study > p {
    grid-column: 1 / -1;
  }

  .case-study > a {
    grid-column: 2;
    grid-row: 1;
  }

  .case-study ol {
    grid-column: 1 / -1;
  }

  .split-feature figure img {
    height: 32rem;
  }

  .split-copy {
    padding: var(--space-8) 0 0;
  }

  .timeline-item {
    grid-template-columns: 3rem 1fr;
  }

  .timeline-item p {
    grid-column: 2;
  }

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

  .journal-card {
    border-right: 0;
    min-height: 23rem;
  }

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

  .detail-hero {
    min-height: 82svh;
  }

  .detail-hero h1 {
    font-size: clamp(3rem, 14vw, 5.2rem);
  }

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

  .contact-option:nth-child(odd) {
    border-right: 0;
  }
}