:root {
  --bg: #f7f9fc;
  --card: #ffffff;
  --text: #1f2a37;
  --subtext: #4b5563;
  --line: #dbe4f0;
  --accent: #1e69c5;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", sans-serif;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
}

.inner {
  width: min(1080px, 92%);
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: -9999px;
}
.skip-link:focus {
  left: 1rem;
  top: 1rem;
  background: #fff;
  border: 1px solid var(--line);
  padding: 0.5rem 0.8rem;
}

.site-header {
  background: linear-gradient(120deg, #426579, #426579);
  color: #fff;
  padding: 2rem 0;
}
.site-header .inner {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}
.site-subtitle {
  display: none;
}
.site-title {
  margin: 0;
  font-size: clamp(1.4rem, 2.6vw, 2rem);
  text-align: center;
}
.site-header-lang {
  margin: 0;
  position: absolute;
  top: 0.1rem;
  right: 0;
}
.site-header-lang a {
  display: inline-block;
  padding: 0.45rem 0.95rem;
  border: 1px solid rgba(255,255,255,0.78);
  border-radius: 999px;
  text-decoration: none;
  font-size: 0.95rem;
  line-height: 1.2;
  transition: background-color 0.2s ease, color 0.2s ease;
}
.site-header-visual {
  width: min(100%, 760px);
}
.site-header-visual img {
  display: block;
  width: 100%;
  height: auto;
}
.site-header a {
  color: #fff;
}
.site-header-lang a:hover,
.site-header-lang a:focus {
  background: #fff;
  color: #141fb1;
}

.global-nav {
  background: #2C3539;
}
.global-nav ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}
.global-nav a {
  display: block;
  color: #fff;
  text-decoration: none;
  padding: 0.8rem 0.6rem;
  font-weight: 600;
}
.global-nav a:hover,
.global-nav a:focus {
  background: rgba(255,255,255,0.12);
}

main {
  padding: 1.2rem 0 2.2rem;
}
section {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1rem 1.1rem;
  margin-top: 1rem;
}
h2 {
  margin-top: 0;
  border-left: 5px solid var(--accent);
  padding-left: 0.6rem;
  font-size: 1.2rem;
}

.hero-link {
  display: block;
}

.hero img {
  width: 100%;
  border-radius: 8px;
  border: 1px solid var(--line);
}

.global-nav a[aria-current="page"] {
  background: rgba(255,255,255,0.16);
}

.members-page {
  padding-top: 1.5rem;
}

.publications-page {
  padding-top: 1.5rem;
  width: min(720px, 92%);
}

.publications-page h2 {
  margin-bottom: 1rem;
  border-left: 0;
  padding-left: 0;
  font-size: clamp(1.35rem, 2.3vw, 1.6rem);
}

.publication-name-list {
  margin: 0;
  padding-left: 1.25rem;
}

.publication-name-list li + li {
  margin-top: 0.75rem;
}

.research-page {
  padding-top: 1.5rem;
}

.breadcrumb {
  margin-top: 0.5rem;
}

.breadcrumb ol {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  color: var(--subtext);
  font-size: 0.95rem;
}

.breadcrumb li + li::before {
  content: ">";
  margin-right: 0.45rem;
  color: #7a8798;
}

.page-intro {
  padding: 1.2rem 1.3rem;
}

.members-page .page-intro-plain {
  margin-top: 1rem;
  padding: 0;
}

.eyebrow {
  margin: 0 0 0.35rem;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.page-intro-text,
.section-heading p,
.member-description {
  margin-bottom: 0;
  color: var(--subtext);
}

.section-heading {
  margin-bottom: 1rem;
}

.section-heading p {
  margin-top: -0.25rem;
}

.member-feature {
  display: grid;
  grid-template-columns: minmax(240px, 320px) minmax(0, 1fr);
  gap: 1.25rem;
  align-items: start;
}

.member-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.member-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fbfcff;
  overflow: hidden;
}

.member-photo {
  background: #edf3fb;
}

.member-photo img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.member-photo-large img {
  aspect-ratio: 3 / 4;
}

.member-body,
.member-card-body {
  padding: 1rem 1.05rem 1.1rem;
}

.member-role {
  margin: 0 0 0.25rem;
  color: var(--accent);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.03em;
}

.member-body h3,
.member-card-body h3,
.alumni-year h3 {
  margin: 0 0 0.75rem;
  font-size: 1.15rem;
}

.member-details {
  margin: 0;
  padding-left: 1.15rem;
}

.member-details.compact {
  font-size: 0.95rem;
}

.member-links {
  margin: 1rem 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.alumni-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}

.alumni-year {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fbfcff;
  padding: 1rem 1.05rem;
}

.alumni-year ul {
  margin: 0;
  padding-left: 1.15rem;
}

.publication-highlights {
  margin: 0;
  padding-left: 1.15rem;
}

.publication-highlights li + li {
  margin-top: 0.65rem;
}

.publication-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.publication-item {
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
}

.publication-title {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.5;
}

.publication-authors,
.publication-meta,
.publication-year-meta {
  margin: 0.45rem 0 0;
  color: var(--subtext);
}

.publication-links {
  margin: 0.75rem 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.publication-year-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}

.publication-year-block {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fbfcff;
  padding: 1rem 1.05rem;
}

.publication-year-block h3 {
  margin: 0 0 0.8rem;
  font-size: 1.1rem;
}

.publication-year-list {
  margin: 0;
  padding-left: 1.15rem;
}

.publication-year-list li + li {
  margin-top: 0.8rem;
}

.publication-year-title {
  display: block;
  font-weight: 600;
  line-height: 1.5;
}

.news-directory {
  padding: 1.1rem 1.2rem 1.3rem;
}

.news-year-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin: 0 0 1.15rem;
}

.news-year-link {
  appearance: none;
  border: 1px solid #b7cae2;
  border-radius: 999px;
  background: #f8fbff;
  color: #174b8a;
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  line-height: 1.2;
  padding: 0.45rem 0.95rem;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.news-year-link:hover,
.news-year-link:focus-visible {
  border-color: #7da2d0;
  background: #eef5ff;
  outline: none;
}

.news-year-link.is-active {
  border-color: #0f2746;
  background: #0f2746;
  color: #fff;
}

.news-panels {
  border-top: 1px solid var(--line);
  padding-top: 1rem;
}

.news-panel[hidden] {
  display: none;
}

.news-panel-header {
  margin-bottom: 0.45rem;
}

.news-panel-header h3 {
  margin: 0;
  font-size: 1.15rem;
}

.news-year-range {
  margin: 0.15rem 0 0;
  color: var(--subtext);
  font-size: 0.93rem;
}

.news-timeline {
  margin: 0;
  padding: 0;
  list-style: none;
}

.news-entry {
  display: grid;
  grid-template-columns: 9.2rem minmax(0, 1fr);
  gap: 0.9rem;
  align-items: start;
  padding: 0.7rem 0;
  border-bottom: 1px dotted var(--line);
}

.news-entry:first-child {
  padding-top: 0.3rem;
}

.news-entry:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.news-entry time {
  display: block;
  color: #174b8a;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.news-entry-body p {
  margin: 0;
}

.researcher-links {
  margin: 0;
  padding-left: 1.15rem;
}

.researcher-links li + li {
  margin-top: 0.55rem;
}

.research-topic + .research-topic {
  margin-top: 1rem;
}

.research-topic {
  display: grid;
  grid-template-columns: minmax(220px, 300px) minmax(0, 1fr);
  gap: 1.2rem;
  align-items: start;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fbfcff;
  overflow: hidden;
}

.research-topic-image {
  background: #FFFFFF;
  height: 100%;
}

.research-topic-image img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 220px;
  object-fit: contain;
}

.research-topic-body {
  padding: 1rem 1.05rem 1.1rem 0;
}

.research-topic-label {
  margin: 0 0 0.25rem;
  color: var(--accent);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.research-topic-body h3 {
  margin: 0 0 0.7rem;
  font-size: 1.15rem;
}

.research-topic-body p {
  margin: 0;
  color: var(--subtext);
}

.research-topic-points {
  margin: 0.9rem 0 0;
  padding-left: 1.15rem;
}

.research-topic-points li + li {
  margin-top: 0.45rem;
}

.research-topic-source {
  display: block;
  margin-top: 0.3rem;
  color: var(--subtext);
  font-size: 0.92rem;
  line-height: 1.6;
  word-break: break-word;
}

.research-cta {
  border: 1px solid #cddcf0;
  border-left: 6px solid var(--accent);
  background: linear-gradient(180deg, #f8fbff, #eef5ff);
}

.research-cta p {
  margin: 0;
  color: var(--subtext);
  font-size: 1.02rem;
}

.link-grid {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.85rem;
}

.link-banner {
  display: block;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #f4f8fd;
  box-shadow: 0 6px 16px rgba(15, 39, 70, 0.08);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.link-banner:hover,
.link-banner:focus-visible {
  transform: translateY(-2px);
  border-color: #9db7dd;
  box-shadow: 0 14px 24px rgba(15, 39, 70, 0.14);
}

.link-banner:focus-visible {
  outline: 3px solid rgba(30, 105, 197, 0.24);
  outline-offset: 3px;
}

.link-banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 1;
  object-fit: contain;
}

a {
  color: var(--accent);
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1rem 0 1.4rem;
  text-align: center;
  color: var(--subtext);
}

@media (max-width: 640px) {
  .site-header .inner {
    gap: 0.75rem;
  }
  .site-header-lang {
    position: static;
  }
  .site-header-visual {
    width: min(100%, 320px);
  }
  .member-feature {
    grid-template-columns: 1fr;
  }
  .research-topic {
    grid-template-columns: 1fr;
  }
  .research-topic-image img {
    min-height: 0;
    aspect-ratio: 4 / 3;
  }
  .research-topic-body {
    padding: 1rem 1.05rem 1.1rem;
  }
  .member-photo-large img {
    aspect-ratio: 4 / 3;
  }
  .news-directory {
    padding-inline: 1rem;
  }
  .news-year-link {
    width: 100%;
    text-align: center;
  }
  .news-entry {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }
  .global-nav .inner {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
  }
  .global-nav ul {
    flex-wrap: nowrap;
    gap: 0;
    width: max-content;
    min-width: 100%;
  }
  .global-nav li {
    flex: 1 0 auto;
  }
  .global-nav a {
    border-top: 0;
    border-left: 1px solid rgba(255,255,255,0.15);
    padding-inline: 0.95rem;
    text-align: center;
    white-space: nowrap;
  }
  .global-nav li:first-child a {
    border-left: 0;
  }
}

#calendar { max-width:600px; margin:16px auto; border:1px solid #ddd; padding:12px; border-radius:6px; font-family: sans-serif; background:#fff; }
.calendar-header{ display:flex; align-items:center; justify-content:space-between; margin-bottom:8px; }
.calendar-header button{ background:#f0f0f0; border:1px solid #ccc; padding:6px 10px; border-radius:4px; cursor:pointer; }
.calendar-title{ display:flex; gap:8px; align-items:center; font-weight:600; }
.calendar-weekdays{ display:grid; grid-template-columns:repeat(7,1fr); text-align:center; font-weight:600; color:#444; margin-bottom:6px; }
.calendar-days{ display:grid; grid-template-columns:repeat(7,1fr); gap:4px; }
.day{ min-height:64px; padding:6px; border-radius:4px; background:#fafafa; position:relative; cursor:pointer; }
.other-month{ color:#999; opacity:0.6; }
.today{ outline:2px solid #3b82f6; }
.in-range{ background:#fef3c7; }
.range-start{ border-radius:4px 0 0 4px; }
.range-end{ border-radius:0 4px 4px 0; }
.event-dot{ position:absolute; right:6px; bottom:6px; width:10px; height:10px; border-radius:50%; background:#ef4444; }
.calendar-events{ margin-top:10px; border-top:1px solid #eee; padding-top:8px; }
.calendar-events ul{ list-style:none; padding-left:0; margin:0; }
.calendar-events li{ padding:6px 0; border-bottom:1px dashed #eee; }