/* Japanese home page
   Shared header, navigation, typography, and footer remain in styles.css. */

.home-page {
  background: #eef1f6;
  color: #202536;
}

.home-page #content {
  --home-navy: #1f274f;
  --home-navy-light: #304f72;
  --home-teal: #1e6f7b;
  --home-pale-teal: #f0f7f7;
  --home-pale: #f4f6f8;
  --home-line: #d8dde7;
  --home-muted: #596476;
  overflow-wrap: anywhere;
}

.home-page #content *,
.home-page #content *::before,
.home-page #content *::after {
  box-sizing: border-box;
}

.home-page #content p,
.home-page #content dd {
  line-height: 1.8;
}

.home-page #content a {
  overflow-wrap: anywhere;
  text-underline-offset: 0.18em;
}

.home-page #content a:not(.home-button):hover,
.home-page #content a:not(.home-button):focus-visible {
  background: none;
  color: #0d6370;
  text-decoration: underline;
}

/* Hero */
.home-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(260px, 0.9fr);
  gap: clamp(1.2rem, 3vw, 2rem);
  align-items: center;
  margin: 1.25rem 0 1.5rem 1rem;
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 1px solid var(--home-line);
  border-radius: 10px;
  background: #fff;
}

.home-eyebrow {
  margin: 0 0 0.45rem;
  color: var(--home-teal);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.home-hero h1 {
  margin: 0 0 0.85rem;
  color: var(--home-navy);
  font-size: clamp(1.85rem, 3.4vw, 2.55rem);
  line-height: 1.3;
  letter-spacing: 0.01em;
}

.home-hero-copy > p:not(.home-eyebrow) {
  margin: 0;
  color: #3f4a5d;
}

.home-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.15rem;
}

.home-button {
  display: inline-block;
  padding: 0.62rem 0.9rem;
  border: 1px solid var(--home-navy);
  border-radius: 5px;
  font-size: 0.9rem;
  font-weight: 800;
  line-height: 1.4;
  text-decoration: none;
}

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

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

.home-button:hover,
.home-button:focus-visible {
  border-color: var(--home-teal);
  background: var(--home-teal);
  color: #fff;
  text-decoration: underline;
}

.home-button:focus-visible {
  outline: 2px solid #77c3c8;
  outline-offset: 2px;
}

.home-hero-image {
  display: grid;
  place-items: center;
  justify-self: center;
  width: min(100%, 320px);
  aspect-ratio: 3 / 4;
  overflow: hidden;
  padding: clamp(0.45rem, 1.5vw, 0.85rem);
  border-radius: 9px;
  background: var(--home-pale-teal);
}

.home-hero-image img {
  display: block;
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: 100%;
  min-width: 0;
  min-height: 0;
  object-fit: contain;
}

/* Section rhythm and headings */
.home-section {
  margin: 4rem 0 0 1rem;
}

.home-section-heading {
  margin: 0 0 1.2rem;
  padding-left: 1rem;
  border-left: 5px solid var(--home-teal);
}

.home-section-heading h2,
.home-about h2,
.home-affiliation h2 {
  margin: 0;
  padding: 0;
  border: 0;
  background: none;
  color: #1d2b4e;
  font-size: clamp(1.35rem, 2.4vw, 1.72rem);
  line-height: 1.4;
}

.home-section-heading p {
  max-width: 55rem;
  margin: 0.35rem 0 0;
  color: #4d586c;
}

/* About */
.home-about {
  display: grid;
  grid-template-columns: minmax(300px, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(1.4rem, 3vw, 2.2rem);
  align-items: start;
  padding: clamp(1rem, 2vw, 1.4rem) 0;
  border-top: 1px solid #b7c2d0;
  border-bottom: 1px solid #d8dde7;
}

.home-about h2 {
  font-size: clamp(1.35rem, 2.2vw, 1.6rem);
}

.home-about-title-line {
  display: block;
}

.home-about-copy p {
  margin: 0;
}

.home-about-copy p + p {
  margin-top: 0.85rem;
}

/* Research overview */
.home-research-panel {
  padding: clamp(1rem, 2.5vw, 1.5rem);
  border: 1px solid var(--home-line);
  border-radius: 10px;
  background: #fff;
}

.home-group-label {
  margin: 0 0 0.65rem;
  color: #334463;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.06em;
}

.home-group-label-secondary {
  margin-top: 1.25rem;
}

.home-core-grid,
.home-support-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.home-research-card {
  min-width: 0;
  padding: 1rem 1.05rem;
  border: 1px solid #d4dae4;
  border-radius: 8px;
}

.home-core-card {
  border-top: 4px solid var(--home-navy);
  background: #fff;
}

.home-expansion-card {
  border-left: 4px solid #718367;
  background: #f7f8f5;
}

.home-foundation-card {
  border-left: 4px solid var(--home-teal);
  background: var(--home-pale-teal);
}

.home-domain-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  align-items: center;
  color: #34415a;
  font-size: 0.86rem;
}

.home-domain-code {
  display: inline-block;
  padding: 0.43rem 0.58rem;
  border-radius: 999px;
  background: var(--home-navy);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.07em;
  line-height: 1;
}

.home-expansion-card .home-domain-code {
  background: #627758;
}

.home-foundation-card .home-domain-code {
  background: var(--home-teal);
}

.home-domain-divider {
  width: 2px;
  height: 1.05rem;
  background: #b86713;
}

.home-domain-role {
  margin-left: auto;
  color: #667086;
  font-size: 0.76rem;
  font-weight: 800;
}

.home-research-card h3,
.home-interest-card h3,
.home-affiliation h3 {
  margin: 0.55rem 0 0.45rem;
  padding: 0;
  border: 0;
  background: none;
  color: #25345f;
  font-size: 1.08rem;
  line-height: 1.45;
}

.home-research-card p {
  margin: 0;
  color: #465267;
}

.home-section-action {
  margin: 1.15rem 0 0;
  text-align: right;
}

/* Students and collaborators */
.home-interest-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.home-interest-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  padding: 1.15rem 1.2rem;
  border: 1px solid #d4dae4;
  border-top: 4px solid var(--home-teal);
  border-radius: 8px;
  background: #fff;
}

.home-interest-card h3 {
  margin-top: 0;
}

.home-interest-card > p:not(.home-card-action) {
  margin: 0;
  color: #465267;
}

.home-card-action {
  margin: auto 0 0;
  padding-top: 1rem;
}

/* News */
.home-news-panel {
  padding: 0 1.1rem;
  border: 1px solid var(--home-line);
  border-radius: 9px;
  background: #fff;
}

.home-news-list {
  margin: 0;
}

.home-news-item {
  display: grid;
  grid-template-columns: minmax(150px, 0.42fr) minmax(0, 1.58fr);
  gap: 1rem;
  align-items: baseline;
  margin: 0;
  padding: 0.85rem 0;
  border-bottom: 1px solid #dde2ea;
}

.home-news-date {
  color: #667086;
  font-size: 0.82rem;
  font-variant-numeric: tabular-nums;
}

.home-news-title {
  margin: 0;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.45rem;
  align-items: baseline;
  color: #263653;
  font-weight: 700;
  line-height: 1.55;
}

.home-news-emoji {
  line-height: 1;
}

.home-news-heading {
  min-width: 0;
  overflow-wrap: anywhere;
}

.home-section-link {
  margin: 0;
  padding: 0.8rem 0;
  text-align: right;
}

/* Affiliation */
.home-affiliation {
  margin-bottom: 1.5rem;
  padding: clamp(1.1rem, 3vw, 1.6rem);
  border: 1px solid #d7dce5;
  border-radius: 10px;
  background: var(--home-pale);
}

.home-affiliation-grid {
  display: grid;
  grid-template-columns: minmax(210px, 0.7fr) minmax(0, 1.3fr);
  gap: 1.5rem;
  margin-top: 1rem;
}

.home-affiliation h3 {
  margin-top: 0;
  font-size: 1rem;
}

.home-affiliation-grid p {
  margin: 0;
}

.home-program-list {
  margin: 0;
}

.home-program-list > div {
  display: grid;
  grid-template-columns: 5.5rem minmax(0, 1fr);
  gap: 0.75rem;
  padding: 0.45rem 0;
  border-bottom: 1px solid #d8dde7;
}

.home-program-list > div:first-child {
  padding-top: 0;
}

.home-program-list > div:last-child {
  border-bottom: 0;
}

.home-program-list dt {
  font-weight: 800;
}

.home-program-list dd {
  margin: 0;
}

.home-affiliation-note {
  margin: 1rem 0 0;
  padding-top: 0.8rem;
  border-top: 1px solid #cfd6e0;
  color: var(--home-muted);
  font-size: 0.9rem;
}

@media (max-width: 900px) {
  .home-hero {
    grid-template-columns: minmax(0, 1.15fr) minmax(230px, 0.85fr);
  }
}

@media (max-width: 820px) {
  .home-affiliation-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .home-hero,
  .home-about,
  .home-core-grid,
  .home-support-grid,
  .home-interest-grid {
    grid-template-columns: 1fr;
  }

  .home-hero-image {
    width: min(300px, 100%);
    margin: 0 auto;
  }

  .home-news-item {
    grid-template-columns: 1fr;
    gap: 0.3rem;
  }
}

@media (max-width: 520px) {
  .home-page #content {
    padding-right: 12px;
    padding-left: 12px;
  }

  .home-hero,
  .home-section {
    margin-left: 0;
  }

  .home-hero {
    padding: 1rem;
  }

  .home-hero h1 {
    font-size: 1.65rem;
  }

  .home-actions {
    display: grid;
  }

  .home-actions .home-button,
  .home-section-action .home-button,
  .home-card-action .home-button {
    width: 100%;
    text-align: center;
  }

  .home-research-panel,
  .home-news-panel {
    padding-right: 0.8rem;
    padding-left: 0.8rem;
  }

  .home-domain-role {
    width: 100%;
    margin-left: 0;
  }

  .home-program-list > div {
    grid-template-columns: 1fr;
    gap: 0.15rem;
  }
}