/* Shared lower-page composition: the Home language, tuned for reading. */
.subpage-main {
  background: var(--theme-bg);
}
.breadcrumb {
  border-block-end: var(--border-hairline) solid var(--theme-border);
  background: var(--theme-bg);
}

.breadcrumb ol {
  display: flex;
  width: min(100%, calc(var(--container-wide) + (var(--page-padding) * 2)));
  margin: 0 auto;
  padding: var(--space-3) var(--page-padding);
  overflow: hidden;
  list-style: none;
}

.breadcrumb li {
  display: flex;
  min-width: 0;
  color: var(--theme-text-muted);
  font-family: var(--font-data);
  font-size: var(--type-caption);
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.breadcrumb li:not(:last-child)::after {
  margin-inline: var(--space-3);
  color: var(--theme-border);
  content: "/";
}

.breadcrumb a,
.breadcrumb span {
  overflow: hidden;
  color: inherit;
  text-overflow: ellipsis;
  text-decoration: none;
}

.page-hero,
.content-section {
  position: relative;
  overflow: clip;
  background: var(--theme-bg);
  color: var(--theme-text);
  isolation: isolate;
}

.page-hero {
  min-height: clamp(34rem, 78svh, 54rem);
  border-block-end: var(--border-hairline) solid var(--theme-border);
}

.page-hero__grid,
.content-section__grid {
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(to right, color-mix(in srgb, var(--theme-border) 56%, transparent) 1px, transparent 1px),
    linear-gradient(to bottom, color-mix(in srgb, var(--theme-border) 40%, transparent) 1px, transparent 1px);
  background-position:
    calc(50% + var(--line-shift-x, 0px))
    calc(50% + var(--line-shift-y, 0px));
  background-size: 25% 100%, 100% 25%;
  mask-image: linear-gradient(to bottom, transparent 2%, #000 18%, #000 82%, transparent 98%);
  pointer-events: none;
}

.page-hero__grid {
  opacity: 0.64;
}

.page-hero__inner {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--grid-gutter);
  align-content: end;
  min-height: clamp(34rem, 78svh, 54rem);
  padding-block: clamp(var(--space-20), 14vw, var(--space-32)) var(--space-12);
}

.page-hero__index {
  grid-column: 1 / -1;
  align-self: start;
  color: var(--theme-text-muted);
  font-family: var(--font-data);
  font-size: var(--type-data);
  letter-spacing: var(--tracking-en-label);
}

.page-hero__title-ja {
  grid-column: 1 / -1;
  margin-block-start: auto;
  color: var(--theme-text-secondary);
  font-size: var(--type-small);
  font-weight: 500;
  letter-spacing: 0.06em;
  transition-delay: 90ms;
}

.page-hero__title {
  grid-column: 1 / -1;
  max-width: 13ch;
  color: var(--theme-text-muted);
  font-family: var(--font-display);
  font-size: clamp(3.4rem, 15vw, 10rem);
  font-weight: 400;
  letter-spacing: var(--tracking-en-display);
  line-height: 0.82;
}

.page-hero__title--outline {
  background-image: linear-gradient(var(--theme-text-muted), var(--theme-text-muted));
  background-position: left center;
  background-repeat: no-repeat;
  background-size: 0% 100%;
  background-clip: text;
  color: transparent;
  font-weight: 600;
  text-transform: uppercase;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  -webkit-text-stroke: var(--border-hairline) color-mix(in srgb, var(--theme-text-muted) 68%, transparent);
  paint-order: stroke fill;
}

.js .page-hero__title--outline {
  transition:
    opacity var(--duration-hero) var(--easing-enter),
    transform var(--duration-hero) var(--easing-enter),
    background-size var(--duration-page-title-fill) var(--easing-enter) 320ms;
}

.js .page-hero__title--outline.is-visible {
  background-size: 100% 100%;
}

@supports not (-webkit-text-stroke: 1px currentcolor) {
  .page-hero__title--outline {
    color: var(--theme-text-muted);
  }
}

.page-hero__lead {
  grid-column: 1 / -1;
  max-width: 38rem;
  margin-block-start: var(--space-4);
  font-size: var(--type-body-l);
  line-height: 1.9;
  transition-delay: 150ms;
}

.page-hero__meta {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: var(--space-4) 0 0;
  padding: 0;
  list-style: none;
  transition-delay: 210ms;
}

.page-hero__meta li,
.technology-cloud li,
.work-case__technologies li {
  padding: var(--space-1) var(--space-3);
  border: var(--border-hairline) solid var(--theme-border);
  border-radius: var(--radius-pill);
  color: var(--theme-text-muted);
  font-family: var(--font-data);
  font-size: var(--type-caption);
  letter-spacing: var(--tracking-en-label);
}

.content-section {
  --grid-x: 0.75rem;
  --grid-y: -0.5rem;
  padding-block: clamp(var(--space-20), 12vw, var(--space-32));
  border-block-end: var(--border-hairline) solid var(--theme-border);
}

.content-section:nth-of-type(even) {
  --grid-x: -0.75rem;
  --grid-y: 0.75rem;
}

.content-section__grid {
  opacity: 0.2;
  transition: opacity var(--duration-hero) var(--easing-standard), transform var(--duration-hero) var(--easing-standard);
}

.content-section.is-current .content-section__grid {
  opacity: 0.5;
  transform: translate3d(var(--grid-x), var(--grid-y), 0);
}

.content-section__inner {
  position: relative;
  z-index: 1;
}

.content-section .section-header {
  margin-block-end: clamp(var(--space-12), 8vw, var(--space-24));
}

.content-section .section-header__heading {
  max-width: 15ch;
  font-size: clamp(2.8rem, 9vw, 7rem);
  letter-spacing: var(--tracking-en-display);
  line-height: 0.9;
}

#ai-integration-overview-heading .section-header__heading-line:first-child {
  color: var(--color-signal);
}

.content-section .section-header__lead {
  max-width: 38rem;
  font-size: var(--type-body);
}

.link-index,
.scope-list,
.principle-list,
.technology-cloud {
  margin: 0;
  padding: 0;
  list-style: none;
}

.product-index {
  border-block-start: var(--border-hairline) solid var(--theme-border);
}

.product-item {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1.3fr) minmax(0, 1fr);
  gap: var(--space-6);
  align-items: center;
  min-height: 22rem;
  padding-block: var(--space-8);
  border-block-end: var(--border-hairline) solid var(--theme-border);
}

.product-item__number {
  align-self: start;
  color: var(--theme-text-muted);
  font-family: var(--font-data);
  font-size: var(--type-data);
}

.product-item__body {
  min-width: 0;
}

.product-item__name {
  margin: 0 0 var(--space-3);
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.2vw, 3rem);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: var(--tracking-en-display);
}

.product-item__label {
  margin: 0 0 var(--space-4);
  color: var(--theme-text-secondary);
  font-size: var(--type-small);
}

.product-item__summary {
  max-width: 38rem;
  margin: 0;
  color: var(--theme-text-secondary);
  line-height: 1.9;
}

.product-item__status {
  margin: var(--space-4) 0;
  color: var(--theme-text-muted);
  font-size: var(--type-small);
}

.product-item__visual {
  --work-diagram-line: var(--color-signal);
  --work-diagram-node: var(--color-signal-subtle);
  --work-diagram-text: var(--theme-text);
  position: relative;
  background-color: var(--theme-bg-subtle);
  background-image:
    linear-gradient(to right, color-mix(in srgb, var(--theme-border) 45%, transparent) 1px, transparent 1px),
    linear-gradient(to bottom, color-mix(in srgb, var(--theme-border) 45%, transparent) 1px, transparent 1px);
  background-size: 12.5% 12.5%;
}

.product-item__visual svg {
  display: block;
  width: 100%;
  height: auto;
}

.product-item__visual > span {
  position: absolute;
  bottom: var(--space-3);
  left: var(--space-4);
  color: var(--theme-text-muted);
  font-family: var(--font-data);
  font-size: var(--type-caption);
  letter-spacing: var(--tracking-en-label);
}

@media (max-width: 47.99rem) {
  .product-item {
    grid-template-columns: 1.5rem minmax(0, 1fr);
    gap: var(--space-4);
    min-height: auto;
  }

  .product-item__visual {
    grid-column: 2;
  }
}

.link-index {
  border-block-start: var(--border-hairline) solid var(--theme-border);
}

.link-index li {
  border-block-end: var(--border-hairline) solid var(--theme-border);
}

.link-index a,
.link-index li > div {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr) auto;
  gap: var(--space-3);
  align-items: start;
  min-height: 11rem;
  padding-block: var(--space-6);
  color: var(--theme-text);
  text-decoration: none;
}

.link-index__number,
.link-index__arrow {
  color: var(--theme-text-muted);
  font-family: var(--font-data);
  font-size: var(--type-data);
}

.link-index__main {
  display: grid;
  gap: var(--space-2);
  min-width: 0;
}

.link-index__main strong {
  font-family: var(--font-display);
  font-size: clamp(2rem, 7vw, 4.5rem);
  font-weight: 400;
  letter-spacing: var(--tracking-en-display);
  line-height: 0.95;
  transition: transform var(--duration-normal) var(--easing-standard);
}

.link-index__main small {
  color: var(--theme-text-secondary);
  font-size: var(--type-small);
}

.link-index__main > span {
  max-width: 38rem;
  margin-block-start: var(--space-4);
  color: var(--theme-text-secondary);
  font-size: var(--type-small);
}

.link-index__arrow {
  font-size: var(--type-h3);
  transition: transform var(--duration-fast) var(--easing-standard);
}

.link-index a:hover,
.link-index a:focus-visible {
  color: var(--theme-text);
}

.link-index a:hover .link-index__main strong,
.link-index a:focus-visible .link-index__main strong {
  transform: translate3d(var(--space-2), 0, 0);
}

.link-index a:hover .link-index__arrow,
.link-index a:focus-visible .link-index__arrow {
  transform: translate3d(var(--space-1), calc(var(--space-1) * -1), 0);
}

.scope-list {
  counter-reset: scope;
  border-block-start: var(--border-hairline) solid var(--theme-border);
}

.scope-list li {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr);
  gap: var(--space-4);
  align-items: baseline;
  padding-block: var(--space-5);
  border-block-end: var(--border-hairline) solid var(--theme-border);
}

.scope-list span {
  color: var(--theme-text-muted);
  font-family: var(--font-data);
  font-size: var(--type-data);
}

.scope-list strong {
  font-size: clamp(1.15rem, 3.3vw, 2rem);
  font-weight: 500;
  line-height: 1.5;
}

.technology-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-block-end: clamp(var(--space-16), 8vw, var(--space-24));
}

.technology-cloud li {
  padding: var(--space-3) var(--space-5);
  font-size: var(--type-small);
}

.service-introduction {
  width: min(100%, var(--container-reading));
  margin-inline: auto;
  color: var(--theme-text-secondary);
  font-size: var(--type-body-l);
  line-height: 1.9;
}

.service-introduction p + p {
  margin-block-start: var(--space-6);
}

.service-introduction__visual {
  width: min(100%, var(--container-reading));
  margin: clamp(var(--space-12), 7vw, var(--space-20)) auto 0;
}

.service-overview {
  border-block-start: var(--border-hairline) solid var(--theme-border);
}

.service-overview__item {
  display: grid;
  grid-template-columns: 2.5rem minmax(0, 1fr);
  gap: var(--space-4);
  padding-block: clamp(var(--space-8), 7vw, var(--space-16));
  border-block-end: var(--border-hairline) solid var(--theme-border);
}

.service-overview__number,
.service-overview__label,
.service-overview__examples > p {
  color: var(--theme-text-muted);
  font-family: var(--font-data);
  font-size: var(--type-data);
  letter-spacing: var(--tracking-en-label);
}

.service-overview__body {
  display: grid;
  gap: var(--space-4);
}

.service-overview__body h3 {
  max-width: 18ch;
  font-size: clamp(1.8rem, 5vw, 3.75rem);
  font-weight: 500;
  line-height: 1.15;
}

.service-overview__summary {
  max-width: 42rem;
  color: var(--theme-text-secondary);
  font-size: var(--type-body-l);
  line-height: 1.8;
}

.service-overview__examples {
  display: grid;
  gap: var(--space-3);
  margin-block-start: var(--space-3);
}

.service-overview__examples ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.service-overview__examples li {
  padding: var(--space-2) var(--space-3);
  border: var(--border-hairline) solid var(--theme-border);
  border-radius: var(--radius-pill);
  color: var(--theme-text-secondary);
  font-size: var(--type-small);
}

.principle-layout {
  display: grid;
  gap: var(--space-16);
}

.principle-layout__statement {
  max-width: 44rem;
  font-size: var(--type-body-l);
}

.principle-layout__statement p + p {
  margin-block-start: var(--space-5);
}

.ai-integration-note {
  max-width: 48rem;
  padding: clamp(var(--space-5), 4vw, var(--space-10));
  border: var(--border-hairline) solid var(--theme-border);
  font-size: var(--type-body-l);
}
.ai-integration-note p + p { margin-block-start: var(--space-5); }

#project-scope,
#ai-integration { --service-note-inset: calc(var(--space-10) + var(--space-4)); }
#project-scope .split-statement,
#ai-integration .ai-integration-note {
  max-width: none;
  margin-inline: var(--service-note-inset);
}
#project-scope .split-statement { display: block; }
@media (min-width: 48rem) {
  #project-scope,
  #ai-integration { --service-note-inset: calc(var(--space-16) + var(--space-8)); }
}
@media (max-width: 29.999rem) {
  #project-scope,
  #ai-integration { --service-note-inset: calc(var(--space-8) + var(--space-3)); }
}

.principle-list {
  border-block-start: var(--border-hairline) solid var(--theme-border);
}

.principle-list li {
  display: grid;
  grid-template-columns: 2.5rem minmax(0, 1fr);
  gap: var(--space-4);
  padding-block: var(--space-6);
  border-block-end: var(--border-hairline) solid var(--theme-border);
}

.principle-list span {
  color: var(--theme-text-muted);
  font-family: var(--font-data);
  font-size: var(--type-data);
}

.principle-list h3,
.principle-list p {
  grid-column: 2;
}

.principle-list h3 {
  font-size: var(--type-h3);
  font-weight: 500;
}

.principle-list p {
  max-width: 38rem;
  color: var(--theme-text-secondary);
  font-size: var(--type-small);
}

.page-cta,
.split-statement,
.status-statement,
.prototype-note {
  border: var(--border-hairline) solid var(--theme-border);
  background: color-mix(in srgb, var(--theme-bg) 82%, transparent);
}

.page-cta,
.split-statement,
.status-statement {
  display: grid;
  gap: var(--space-8);
  align-items: end;
  padding: clamp(var(--space-6), 5vw, var(--space-12));
}

.page-cta {
  margin-block-start: clamp(var(--space-16), 8vw, var(--space-24));
}

.page-cta p,
.status-statement strong {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 0.92;
}

.page-cta p,
.status-statement strong[lang="en"] {
  font-size: clamp(2.5rem, 8vw, 6.5rem);
  letter-spacing: var(--tracking-en-display);
}

.status-statement strong:not([lang="en"]) {
  font-size: var(--type-ja-display-max);
  letter-spacing: -0.015em;
}

.split-statement > p,
.status-statement > p {
  max-width: 35rem;
  color: var(--theme-text-secondary);
  font-size: var(--type-body-l);
}

.prototype-note {
  margin-block-end: var(--space-12);
  padding: var(--space-5);
  border-inline-start: 0.25rem solid var(--color-signal);
  color: var(--theme-text-secondary);
  font-size: var(--type-small);
}

.approach-sequence {
  display: grid;
  border-block-start: var(--border-hairline) solid var(--theme-border);
}

.approach-sequence > div {
  display: grid;
  grid-template-columns: 2.5rem minmax(0, 1fr);
  gap: var(--space-4);
  min-height: 10rem;
  padding-block: var(--space-6);
  border-block-end: var(--border-hairline) solid var(--theme-border);
}

.approach-sequence span {
  color: var(--theme-text-muted);
  font-family: var(--font-data);
  font-size: var(--type-data);
}

.approach-sequence p {
  align-self: center;
  font-size: clamp(1.45rem, 5vw, 3.5rem);
  font-weight: 500;
  line-height: 1.25;
}

/* Work page: editorial cases; EC remains visible as past experience. */
.work-index {
  display: grid;
  gap: clamp(var(--space-16), 8vw, var(--space-24));
}

.work-case {
  display: grid;
  grid-template-columns: 1.5rem minmax(0, 1fr);
  gap: var(--space-3);
  align-items: start;
  position: relative;
}

.work-case__number {
  display: block;
  color: var(--theme-text-muted);
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0;
  line-height: 0.8;
  white-space: nowrap;
}

.work-case__media {
  grid-column: 2;
  width: 100%;
  overflow: hidden;
  aspect-ratio: 1;
  border: var(--border-hairline) solid var(--theme-border);
  background: var(--theme-bg-subtle);
}

.work-case__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--easing-standard);
}

.work-case:hover .work-case__media img {
  transform: scale(1.02);
}

.work-case__body {
  grid-column: 2;
  display: grid;
  gap: var(--space-3);
}

.work-case__meta {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  color: var(--theme-text-muted);
  font-family: var(--font-data);
  font-size: var(--type-data);
  letter-spacing: var(--tracking-en-label);
}

.work-item__title {
  max-width: 18ch;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 4.5vw, 2rem);
  font-weight: 500;
  letter-spacing: -0.015em;
  line-height: 0.98;
}

.work-item__summary {
  max-width: 36rem;
  color: var(--theme-text-secondary);
  font-size: var(--type-small);
}

.work-case__meta span {
  display: none;
}

.work-case__technologies {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: var(--space-2) 0 0;
  padding: 0;
  list-style: none;
}

.work-case__line {
  grid-column: 1 / -1;
  height: 1px;
  margin-block-start: var(--space-8);
  background: var(--theme-border);
  transform-origin: left;
}

.work-case--legacy {
  opacity: 0.78;
}

/* Publishing and book detail. */
.book-index {
  display: grid;
  gap: var(--space-20);
}

.book-item {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  gap: var(--space-6);
  height: 100%;
}

.book-item__media {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 25rem;
  padding: var(--space-10);
  border: var(--border-hairline) solid var(--theme-border);
  background: var(--theme-bg-subtle);
}

.book-item__media img {
  width: auto;
  height: auto;
  max-height: 28rem;
  object-fit: contain;
  filter: drop-shadow(0 1rem 1.25rem rgb(28 25 21 / 18%));
}

.book-item__number {
  position: absolute;
  inset-block-start: var(--space-4);
  inset-inline-start: var(--space-4);
  color: var(--theme-text-muted);
  font-family: var(--font-data);
  font-size: var(--type-data);
}

.book-item__body {
  display: grid;
  grid-template-rows: auto auto auto auto minmax(0, 1fr) auto;
  gap: var(--space-3);
}

.book-item__category,
.book-item__author {
  color: var(--theme-text-muted);
  font-family: var(--font-data);
  font-size: var(--type-data);
}

.book-item__title {
  font-family: var(--font-body);
  font-size: clamp(1.7rem, 5vw, 3rem);
  line-height: 1.35;
}

.book-item__title a {
  color: var(--theme-text);
  text-decoration: none;
}

.book-item__subtitle,
.book-item__summary {
  color: var(--theme-text-secondary);
}

.editorial-statement {
  max-width: 19ch;
  margin-block-end: var(--space-16);
  font-family: var(--font-body);
  font-size: clamp(2rem, 7vw, 5rem);
  line-height: 1.45;
}

.publishing-introduction {
  display: grid;
  gap: var(--space-12);
}

.publishing-introduction .editorial-statement {
  margin-block-end: 0;
}

.publishing-introduction > div {
  display: grid;
  gap: var(--space-5);
  max-width: var(--container-reading);
  color: var(--theme-text-secondary);
  font-size: var(--type-body-l);
  line-height: 1.9;
}

.publishing-introduction > div:only-child {
  grid-column: 1 / -1;
  width: min(100%, 52rem);
  max-width: 52rem;
  margin-inline: auto;
}

.publishing-site-cta {
  display: grid;
  gap: var(--space-8);
  align-items: end;
  padding: clamp(var(--space-6), 5vw, var(--space-12));
  border: var(--border-hairline) solid var(--theme-border);
  background: var(--theme-bg-subtle);
}

.publishing-site-cta p {
  max-width: 36rem;
  color: var(--theme-text-secondary);
  font-size: var(--type-body-l);
  line-height: 1.8;
}

.news-lines {
  border-block-start: var(--border-hairline) solid var(--theme-border);
}

.news-lines > div {
  display: grid;
  gap: var(--space-2);
  padding-block: var(--space-5);
  border-block-end: var(--border-hairline) solid var(--theme-border);
}

.news-lines time {
  color: var(--theme-text-muted);
  font-family: var(--font-data);
  font-size: var(--type-data);
}

.book-detail {
  display: grid;
  gap: var(--space-12);
}

.book-detail figure {
  display: grid;
  place-items: center;
  min-height: 28rem;
  margin: 0;
  padding: var(--space-10);
  border: var(--border-hairline) solid var(--theme-border);
  background: var(--theme-bg-subtle);
}

.book-detail figure img {
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: 32rem;
  object-fit: contain;
  filter: drop-shadow(0 1rem 1.5rem rgb(28 25 21 / 20%));
}

.book-detail dl,
.company-data {
  margin: 0;
  border-block-start: var(--border-hairline) solid var(--theme-border);
}

.book-detail dl > div,
.company-data__row {
  display: grid;
  grid-template-columns: minmax(5rem, 0.35fr) minmax(0, 1fr);
  gap: var(--space-4);
  padding-block: var(--space-4);
  border-block-end: var(--border-hairline) solid var(--theme-border);
}

.book-detail dt,
.company-data dt {
  color: var(--theme-text-muted);
  font-family: var(--font-data);
  font-size: var(--type-data);
}

.book-detail dd,
.company-data dd {
  margin: 0;
}

.purchase-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.book-prose {
  display: grid;
  gap: var(--space-5);
  max-width: var(--container-reading);
  margin-block-start: var(--space-6);
  color: var(--theme-text-secondary);
  font-size: var(--type-body-l);
  line-height: 1.9;
  overflow-wrap: anywhere;
}

.book-prose p {
  margin: 0;
}

.book-previews {
  display: flex;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  overscroll-behavior-x: contain;
}

.book-previews a {
  display: grid;
  flex: 0 0 100%;
  min-width: 0;
  box-sizing: border-box;
  padding: var(--space-2);
  gap: var(--space-3);
  scroll-snap-align: start;
  text-align: center;
  color: var(--theme-text-secondary);
}

.book-previews img {
  width: 100%;
  height: 22rem;
  object-fit: contain;
  border: var(--border-hairline) solid var(--theme-border);
}

.book-slider {
  width: min(100%, 20rem);
}

.book-slider__controls:not([hidden]) {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-block-start: var(--space-4);
}

.book-slider__controls button {
  min-height: 2.75rem;
  padding: var(--space-2) var(--space-3);
  border: var(--border-hairline) solid var(--theme-border);
  background: var(--theme-bg);
  color: var(--theme-text);
  font: inherit;
  cursor: pointer;
}

.book-slider__controls button:disabled {
  opacity: 0.45;
  cursor: default;
}

.book-author {
  display: grid;
  gap: var(--space-6);
  max-width: var(--container-reading);
}

.book-author > img {
  width: 8rem;
  height: auto;
}

.book-author .text-link {
  margin-block-start: var(--space-6);
}

.book-sales {
  display: grid;
  gap: var(--space-8);
}

.book-sales > div {
  display: grid;
  justify-items: start;
  gap: var(--space-4);
  padding-block: var(--space-6);
  border-block-start: var(--border-hairline) solid var(--theme-border);
}

.book-sales p {
  margin: 0;
}

@media (min-width: 48rem) {
  .book-author {
    grid-template-columns: 8rem minmax(0, 1fr);
  }

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

/* Corporate and contact. */
.content-section--about-content .company-data,
.content-section--about-content .ceo-profile {
  width: min(100%, var(--container-reading));
  margin-inline: auto;
}

.company-data__address img {
  display: block;
  /* Scale the address to 90% of its text-matched size, including narrow layouts. */
  width: calc(26.167em * 0.9);
  max-width: 90%;
  height: auto;
}

@media (max-width: 47.999rem) {
  .company-data__row {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-2);
  }
}

[data-theme="dark"] .company-data__address img {
  filter: invert(1);
}

.company-data a {
  color: var(--theme-text);
}

.ceo-profile {
  display: grid;
  gap: var(--space-12);
}

.ceo-profile__header {
  padding-block-end: var(--space-8);
  border-block-end: var(--border-hairline) solid var(--theme-border);
}

.ceo-profile__role,
.ceo-profile__name-ja {
  color: var(--theme-text-muted);
  font-size: var(--type-small);
}

.ceo-profile__name {
  margin-block: var(--space-3);
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 500;
  letter-spacing: var(--tracking-en-display);
  line-height: 0.9;
}

.ceo-profile__body {
  max-width: var(--container-reading);
}

.ceo-profile__body p + p {
  margin-block-start: var(--space-5);
}

.ceo-profile__details {
  display: grid;
  gap: var(--space-8);
}

.ceo-profile__details h4 {
  margin-block-end: var(--space-4);
  color: var(--theme-text-muted);
  font-family: var(--font-data);
  font-size: var(--type-data);
  letter-spacing: 0.06em;
}

.ceo-profile__details ul {
  margin: 0;
  padding-inline-start: 1.25rem;
}

.contact-layout {
  display: grid;
  gap: var(--space-12);
}

.contact-layout__intro {
  max-width: var(--container-narrow);
  color: var(--theme-text-secondary);
}

.contact-form {
  display: grid;
  gap: var(--space-8);
}

.contact-form__field {
  display: grid;
  gap: var(--space-3);
}

.contact-form__field label {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 500;
}

.contact-form__required,
.contact-form__optional {
  color: var(--theme-text-muted);
  font-family: var(--font-data);
  font-size: var(--type-caption);
  font-weight: 400;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 0;
  border-block-end: var(--border-hairline) solid var(--theme-border);
  border-radius: 0;
  background: transparent;
}

.contact-form__submit {
  display: flex;
  justify-content: space-between;
  min-height: 4.5rem;
  padding: var(--space-5);
  background: var(--color-signal);
  color: var(--color-on-signal);
  font-weight: 600;
}

/* Shared motion reserves layout before reveal. */
.js [data-line-reveal] {
  transform: scaleX(0);
  transition: transform var(--duration-hero) var(--easing-enter);
}

.js [data-line-reveal].is-visible {
  transform: scaleX(1);
}

.js .content-section.is-current [data-grid-reveal].is-visible {
  opacity: 0.5;
  transform: translate3d(var(--grid-x), var(--grid-y), 0) scaleX(1);
}

@media (min-width: 48rem) {
  .publishing-introduction {
    grid-template-columns: minmax(0, 1.05fr) minmax(20rem, 0.95fr);
    align-items: start;
  }

  .publishing-site-cta {
    grid-template-columns: minmax(0, 1fr) minmax(16rem, auto);
  }

  .publishing-site-cta .button-link {
    justify-self: end;
    min-width: 16rem;
  }

  #ai-integration-overview-heading {
    max-width: none;
    font-size: clamp(2.8rem, 7.2vw, 6.5rem);
  }

  #ai-integration-overview-heading .section-header__heading-line:last-child {
    white-space: nowrap;
  }

  .page-hero__inner {
    grid-template-columns: repeat(8, minmax(0, 1fr));
    padding-block-end: var(--space-16);
  }

  .page-hero__title-ja,
  .page-hero__title,
  .page-hero__lead,
  .page-hero__meta {
    grid-column: 2 / span 6;
  }

  .page-hero__title {
    font-size: clamp(5rem, 12vw, 9rem);
  }

  .page-hero__lead {
    grid-column: 5 / span 4;
  }

  .page-hero__meta {
    grid-column: 5 / span 4;
  }

  .link-index a,
  .link-index li > div {
    grid-template-columns: 4rem minmax(16rem, 0.9fr) minmax(15rem, 0.55fr) 2rem;
    gap: var(--space-6);
    min-height: 12rem;
  }

  .link-index__main {
    display: contents;
  }

  .link-index__main strong,
  .link-index__main small {
    grid-column: 2;
  }

  .link-index__main > span {
    grid-column: 3;
    grid-row: 1 / span 2;
    margin: 0;
  }

  .link-index__arrow {
    grid-column: 4;
  }

  .scope-list li {
    grid-template-columns: 4rem minmax(0, 1fr);
    min-height: 6rem;
  }

  .principle-layout {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  }

  .page-cta,
  .split-statement,
  .status-statement {
    grid-template-columns: minmax(0, 1.2fr) minmax(16rem, 0.8fr);
  }

  .page-cta .button-link,
  .split-statement .button-link {
    justify-self: end;
    min-width: 16rem;
  }

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

  .approach-sequence > div {
    grid-template-columns: 1fr;
    min-height: 22rem;
    padding: var(--space-6);
    border-inline-end: var(--border-hairline) solid var(--theme-border);
  }

  .work-case {
    grid-template-columns: 6rem minmax(14rem, 18rem) minmax(0, 1fr);
    gap: var(--grid-gutter);
  }

  .work-case__number {
    grid-column: 1;
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    letter-spacing: var(--tracking-en-hero);
  }

  .work-case__media {
    grid-column: 2;
  }

  .work-case__body {
    grid-column: 3;
    align-self: center;
    padding-inline-start: var(--space-4);
  }

  .work-case__meta span {
    display: inline;
  }

  .work-item__title {
    font-size: clamp(2rem, 3.2vw, 3.75rem);
  }

  .work-case__line {
    grid-column: 1 / -1;
  }

  .book-index {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: var(--grid-gutter);
  }

  .book-item {
    grid-column: span 2;
  }

  .book-item__media {
    height: 30rem;
    min-height: 0;
  }

  .book-item__title {
    min-height: 2.7em;
    color: var(--theme-text-muted);
    font-size: clamp(1.5rem, 2.2vw, 2.25rem);
    font-weight: 500;
  }

  .book-item__title a {
    color: inherit;
  }

  .book-item__subtitle {
    min-height: 3.5rem;
  }

  .news-lines > div {
    grid-template-columns: 10rem minmax(0, 1fr);
  }

  .book-detail {
    grid-template-columns: minmax(0, 1.05fr) minmax(20rem, 0.95fr);
    align-items: start;
  }

  .ceo-profile__details,
  .contact-layout {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--grid-gutter);
  }
}

@media (min-width: 64rem) {
  .service-overview__item {
    grid-template-columns: 4rem minmax(0, 1fr);
    gap: var(--grid-gutter);
  }

  .service-overview__body {
    grid-column: 2;
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-4);
  }

  .service-overview__label,
  .service-overview__summary,
  .service-overview__examples {
    grid-column: 1;
  }

  .service-overview__body h3 {
    grid-column: 1;
    max-width: none;
    white-space: nowrap;
  }

  .page-hero__inner {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .page-hero__title-ja,
  .page-hero__title {
    grid-column: 2 / span 10;
  }

  .page-hero__lead,
  .page-hero__meta {
    grid-column: 8 / span 5;
  }

  .page-hero__title {
    font-size: clamp(6rem, 10vw, 10rem);
  }
}

@media (max-width: 29.999rem) {
  .page-hero__title {
    overflow-wrap: normal;
    word-break: normal;
    hyphens: auto;
  }

  .content-section .section-header {
    grid-template-columns: 2rem minmax(0, 1fr);
    gap: var(--space-3);
  }

  .page-cta .button-link,
  .split-statement .button-link,
  .purchase-links .button-link {
    width: 100%;
  }

  .page-cta p,
  .status-statement strong {
    font-size: 2.4rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-hero__title--outline,
  .js .page-hero__title--outline.is-visible {
    background-size: 100% 100%;
  }

  .page-hero__title-ja,
  .page-hero__lead,
  .page-hero__meta {
    transition-delay: 0ms;
  }

  .content-section.is-current .content-section__grid,
  .js .content-section.is-current [data-grid-reveal].is-visible,
  .js [data-line-reveal] {
    transform: none;
  }

  .work-case:hover .work-case__media img {
    transform: none;
  }
}


/* Publishing book details: compact, quiet reading layouts. */
.publishing-main + .site-footer .site-footer__brand {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  letter-spacing: 0;
  line-height: 1.3;
}

.publishing-main + .site-footer .site-footer__inner {
  padding-block: var(--space-10);
  gap: var(--space-6);
}

.publishing-main + .site-footer .site-footer__masthead {
  padding-block-end: var(--space-6);
  gap: var(--space-4);
}

.publishing-main .container--wide:not(.page-hero__inner),
.publishing-main .page-hero--reading .container--wide {
  max-width: 60rem;
}

.publishing-main .page-hero--reading,
.publishing-main .page-hero--reading .page-hero__inner {
  min-height: 0;
}

.publishing-main .page-hero--reading .page-hero__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  padding-block: var(--space-10);
  text-align: center;
}

.publishing-main .page-hero--reading .page-hero__index {
  display: none;
}

.publishing-main .page-hero--reading .page-hero__title-ja {
  margin: 0;
  font-size: var(--type-small);
}

.publishing-main .page-hero--reading .page-hero__title {
  max-width: 100%;
  margin: 0;
  color: var(--theme-text);
  font-family: var(--font-body);
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 500;
  letter-spacing: 0.03em;
  line-height: 1.5;
}

.publishing-main .page-hero--reading .page-hero__lead {
  max-width: var(--container-reading);
  font-size: 1rem;
  line-height: 1.9;
}

.publishing-main .page-hero--reading .page-hero__meta {
  justify-content: center;
}

.publishing-main .content-section {
  padding-block: var(--space-12);
}

.publishing-main .content-section .section-header {
  margin-block-end: var(--space-6);
}

.publishing-main .content-section .section-header__heading {
  max-width: none;
  font-size: clamp(1.3rem, 2.5vw, 1.75rem);
  line-height: 1.4;
  letter-spacing: 0.01em;
}

.publishing-main .page-hero__grid,
.publishing-main .content-section__grid {
  display: none;
}

.publishing-main .publishing-introduction {
  display: block;
  text-align: center;
}

.publishing-main .publishing-introduction > div {
  margin-inline: auto;
  font-size: 1rem;
}

.publishing-main .book-detail {
  gap: var(--space-8);
}

.publishing-main .book-detail figure {
  min-height: 0;
  padding: var(--space-5);
}

.publishing-main .book-detail figure img {
  max-height: 15rem;
  max-width: 11rem;
}

.publishing-main .book-prose {
  margin-block-start: var(--space-4);
  font-size: 1rem;
}

.publishing-main .scope-list li {
  min-height: 0;
  padding-block: var(--space-4);
}

.publishing-main .scope-list strong {
  font-size: 1rem;
  font-weight: 500;
}

.publishing-main .book-author {
  grid-template-columns: 4rem minmax(0, 1fr);
  gap: var(--space-4);
}

.publishing-main .book-author > img {
  width: 4rem;
  max-height: 5rem;
  object-fit: contain;
}

.publishing-main .book-item__media {
  height: 15rem;
  min-height: 0;
}

.publishing-main .book-item__media img {
  max-height: 12rem;
  width: auto;
  max-width: 100%;
}

.publishing-main .book-item__title {
  min-height: 0;
  font-size: 1.2rem;
}

@media (min-width: 48rem) {
  .publishing-main .book-detail {
    grid-template-columns: 15rem minmax(0, 1fr);
  }
}

/* Give the three-book catalogue more room around smaller covers and titles. */
#books .book-index { gap: clamp(var(--space-8), 4vw, var(--space-16)); }
#books .book-item__media {
  height: 20rem;
  min-height: 0;
  padding: var(--space-6);
}
#books .book-item__media img { max-height: 13rem; max-width: 100%; }
#books .book-item__title {
  font-size: clamp(1.2rem, 1.7vw, 1.5rem);
  line-height: 1.5;
}
.book-author > img,
.publishing-main .book-author > img {
  width: 8rem;
  height: auto;
  aspect-ratio: 1;
  max-height: none;
  border-radius: 50%;
  clip-path: circle(50%);
  object-fit: cover;
  object-position: center 30%;
}
.publishing-main .book-author {
  grid-template-columns: 8rem minmax(0, 1fr);
  gap: var(--space-6);
}