:root {
  /* Conservative anchor offset until the header's actual height is measured. */
  --site-header-height: 180px;
  --color-navy: #123a63;
  --color-blue: #0878b9;
  --color-teal: #087f7b;
  --color-news-date: #066864;
  --color-text: #263746;
  --color-muted: #667785;
  --color-border: #dbe4ea;
  --color-project-border: #b8cbd7;
  --color-surface: #ffffff;
  --color-surface-soft: #f5f9fb;
}

html {
  scroll-padding-top: calc(var(--site-header-height) + 16px);
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-surface);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  padding: 0 24px;
  gap: 16px 32px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.site-title {
  display: block;
  text-decoration: none;
  flex-shrink: 0;
  max-width: 100%;
}

.header-logo {
  display: block;
  width: auto;
  height: auto;
  max-height: 66px;
  max-width: min(360px, 100%);
}

.main-nav {
  min-width: 0;
  max-width: 100%;
}

.main-menu {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 8px 24px;
}

.main-menu a {
  display: flex;
  align-items: center;
  min-height: 32px;
  color: var(--color-navy);
  text-decoration: none;
}

.main-menu a:hover,
.main-menu a:focus-visible {
  color: var(--color-blue);
  text-decoration: underline;
}

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 24px;
}

.home-intro,
.home-news,
.home-projects {
  margin-bottom: 64px;
}

.home-intro h1 {
  font-size: clamp(2rem, 4vw, 2.5rem);
  line-height: 1.3;
  margin: 0 0 24px;
}

.home-intro p {
  font-size: 1.125rem;
  line-height: 1.9;
}

.home-logo {
  display: block;
  width: 100%;
  max-width: 48rem;
  height: auto;
  margin-bottom: 24px;
}

.sr-only,
.home-intro h1.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.home-news h2,
.home-projects h2 {
  font-size: 1.75rem;
  line-height: 1.4;
  margin: 0 0 24px;
  color: var(--color-navy);
  border-left: 3px solid var(--color-teal);
  padding-left: 12px;
}

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

.home-news-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 24px;
  padding: 16px 0;
  border-bottom: 1px solid var(--color-border);
  overflow-wrap: anywhere;
}

.home-news-list li:hover {
  background: var(--color-surface-soft);
}

.home-news-list time {
  flex: 0 0 7rem;
  color: var(--color-news-date);
}

.home-news-list a {
  flex: 1 1 16rem;
  min-width: 0;
  color: var(--color-text);
  text-decoration: none;
}

.home-news-list a:hover,
.home-news-list a:focus-visible {
  color: var(--color-blue);
  text-decoration: underline;
}

.section-more {
  text-align: right;
  margin: 24px 0 0;
}

.section-more a {
  color: var(--color-blue);
  text-decoration: none;
}

.section-more a:hover,
.section-more a:focus-visible {
  color: var(--color-teal);
  text-decoration: underline;
}

.research-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.research-card {
  padding: 24px;
  border: 1px solid var(--color-project-border);
  border-radius: 8px;
  background: var(--color-surface);
  color: var(--color-text);
  text-decoration: none;
  box-shadow: 0 2px 8px rgba(18, 58, 99, 0.05);
  transition: border-color 150ms ease, box-shadow 150ms ease, transform 150ms ease;
}

.research-card:hover,
.research-card:focus-visible {
  border-color: var(--color-blue);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(18, 58, 99, 0.1);
}

.research-card h3 {
  color: var(--color-navy);
}

.research-card img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
}

.project-detail-section {
  margin: 40px 0;
  overflow-wrap: anywhere;
}

.project-detail-section h2 {
  color: var(--color-navy);
  border-left: 3px solid var(--color-teal);
  padding-left: 12px;
}

.project-detail .project-keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  list-style: none;
  padding: 0;
}

.project-records li + li {
  margin-top: 12px;
}

.project-detail-section a {
  color: var(--color-blue);
}

.project-detail-section a:hover,
.project-detail-section a:focus-visible {
  color: var(--color-teal);
}

.project-detail .project-records-muted-links a,
.project-detail .project-records-muted-links a:visited {
  color: var(--color-text);
  text-decoration: none;
}

.project-detail .project-records-muted-links a:hover,
.project-detail .project-records-muted-links a:focus-visible {
  color: var(--color-navy);
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

.project-detail .project-records-muted-links a:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 3px;
}

.project-detail a.project-related-link,
.project-detail a.project-related-link:visited {
  color: var(--color-text);
  text-decoration: none;
}

.project-detail a.project-related-link:hover,
.project-detail a.project-related-link:focus-visible {
  color: var(--color-teal);
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

.project-detail a.project-related-link:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 3px;
}

.project-slider {
  max-width: 960px;
  margin: 32px auto;
}

.project-slider [hidden] {
  display: none;
}

.project-slide {
  margin: 0 0 16px;
}

.project-slide img {
  display: block;
  width: 100%;
  height: clamp(220px, 45vw, 480px);
  object-fit: contain;
  background: var(--color-surface-soft);
  border-radius: 6px;
}

.project-slide figcaption {
  margin-top: 8px;
  color: var(--color-muted);
  text-align: center;
  overflow-wrap: anywhere;
}

.project-slider-controls,
.project-slider-dots {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.project-slider button {
  min-width: 36px;
  min-height: 36px;
  padding: 6px 10px;
  border: 1px solid var(--color-project-border);
  border-radius: 6px;
  background: var(--color-surface);
  color: var(--color-navy);
  font: inherit;
  cursor: pointer;
}

.project-slider button:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 3px;
}

.project-slider button:hover {
  border-color: var(--color-blue);
}

.project-slider button.project-slider-dot {
  min-width: 24px;
  min-height: 24px;
  padding: 0;
  border-radius: 50%;
}

.project-slider-dot[aria-current="true"] {
  background: var(--color-blue);
  border-color: var(--color-blue);
}

.project-slider button:disabled {
  color: var(--color-muted);
  cursor: default;
}

.related-links {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  width: 100%;
  max-width: 700px;
  gap: 18px;
  margin: 48px auto 0;
}

.related-link {
  display: flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  aspect-ratio: 600 / 160;
  padding: 8px;
  min-width: 0;
  min-height: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  overflow: hidden;
}

.related-link:hover,
.related-link:focus-visible {
  border-color: var(--color-blue);
}

.related-link img {
  max-width: 78%;
  max-height: 68%;
  width: auto;
  height: auto;
  object-fit: contain;
  display: block;
  transform: scale(var(--link-logo-scale, 1));
  transform-origin: center;
}

.related-link-tut {
  --link-logo-scale: 1.25;
}

.related-link-cse {
  --link-logo-scale: 0.88;
}

.related-link-consultation {
  --link-logo-scale: 1.5;
}

.member-group {
  margin: 40px 0 52px;
}

.member-group h2 {
  margin: 0 0 24px;
  color: var(--color-navy);
  border-left: 3px solid var(--color-teal);
  padding-left: 12px;
}

.member-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.member-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  min-width: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow: hidden;
}

.member-photo {
  display: block;
  width: 104px;
  height: 104px;
  flex-shrink: 0;
  border-radius: 6px;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  background: var(--color-surface-soft);
}

.member-info {
  padding: 0;
  min-width: 0;
  flex: 1;
}

.member-name {
  margin: 0 0 6px;
  font-size: 1.125rem;
  color: var(--color-navy);
  overflow-wrap: anywhere;
}

.member-name a {
  color: inherit;
  text-decoration: none;
}

.member-role {
  margin: 0 0 8px;
  font-size: 0.9375rem;
  color: var(--color-muted);
  overflow-wrap: anywhere;
}

.member-email {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-muted);
  overflow-wrap: anywhere;
}

.member-email-note {
  margin: 32px 0 0;
  font-size: 0.9375rem;
  color: var(--color-muted);
}

.member-name a:hover,
.member-name a:focus-visible {
  color: var(--color-teal);
  text-decoration: underline;
}

.alumni-divider {
  margin: 48px 0 32px;
  border: 0;
  border-top: 1px solid var(--color-border);
}

.alumni-section h2 {
  margin: 0 0 24px;
  color: var(--color-navy);
  border-left: 3px solid var(--color-teal);
  padding-left: 12px;
}

.alumni-year {
  margin: 32px 0 12px;
  font-size: 1.125rem;
  color: var(--color-navy);
}

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

.alumni-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 24px;
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border);
}

.alumni-name {
  flex: 0 1 12rem;
  overflow-wrap: anywhere;
}

.alumni-note {
  flex: 1 1 16rem;
  color: var(--color-muted);
  overflow-wrap: anywhere;
}

.alumni-preparing {
  margin: 24px 0 0;
  font-size: 0.9375rem;
  color: var(--color-muted);
}

.contact-section {
  margin: 40px 0 56px;
}

.contact-section h2 {
  margin: 0 0 24px;
  color: var(--color-navy);
  border-left: 3px solid var(--color-teal);
  padding-left: 12px;
}

.contact-block {
  max-width: 48rem;
  overflow-wrap: anywhere;
}

.contact-block p {
  margin: 0 0 16px;
}

.contact-address {
  margin: 0 0 20px;
  font-style: normal;
  line-height: 1.9;
  color: var(--color-text);
}

.contact-map {
  width: 100%;
  margin-bottom: 16px;
  border-radius: 6px;
  overflow: hidden;
}

.contact-map-frame {
  display: block;
  width: 100%;
  height: clamp(280px, 50vw, 400px);
  border: 0;
}

.contact-rooms {
  list-style: none;
  margin: 0;
  padding: 0;
  line-height: 1.9;
}

.contact-rooms li + li {
  margin-top: 8px;
}

.contact-email {
  font-size: 1.0625rem;
  color: var(--color-text);
}

.contact-note {
  font-size: 0.9375rem;
  color: var(--color-muted);
}

.contact-link {
  color: var(--color-blue);
  text-decoration: none;
}

.contact-link:hover,
.contact-link:focus-visible {
  color: var(--color-teal);
  text-decoration: underline;
}

.contact-consultation-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  width: min(100%, 280px);
  padding: 8px;
  border: 1px solid var(--color-project-border);
  border-radius: 6px;
  background: var(--color-surface);
  text-decoration: none;
}

.contact-consultation-link:hover,
.contact-consultation-link:focus-visible {
  border-color: var(--color-blue);
  box-shadow: 0 2px 8px rgba(18, 58, 99, 0.08);
}

.contact-consultation-image {
  display: block;
  width: 100%;
  height: auto;
  object-fit: contain;
}

.page-lastmod {
  margin: 40px 0 0;
  text-align: right;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--color-muted);
}

footer {
  background: var(--color-navy);
  color: var(--color-surface);
  padding: 32px 24px;
  text-align: center;
}

footer p {
  margin: 0;
  overflow-wrap: anywhere;
}

footer p + p {
  margin-top: 8px;
  color: var(--color-surface-soft);
}

@media (prefers-reduced-motion: reduce) {
  .research-card {
    transition: none;
  }

  .research-card:hover,
  .research-card:focus-visible {
    transform: none;
  }
}

@media (max-width: 900px) {
  .site-header {
    flex-direction: column;
    align-items: flex-start;
    padding-top: 0;
    padding-bottom: 0;
    row-gap: 0;
  }

  .header-logo {
    max-height: 56px;
  }

  .main-menu {
    row-gap: 2px;
  }

  .member-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .research-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 600px) {
  .member-photo {
    width: 84px;
    height: 84px;
  }

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

  .related-links {
    grid-template-columns: minmax(0, 1fr);
  }
}