:root {
  --navy: #0b2d45;
  --ocean: #0f5f78;
  --ice: #eaf6f8;
  --mist: #f6fafb;
  --ink: #1e2b33;
  --muted: #5d6b73;
  --line: #d6e2e6;
  --white: #ffffff;
  --shadow: 0 12px 28px rgba(11, 45, 69, 0.10);
  --radius: 18px;
  --max-width: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans",
    "Hiragino Kaku Gothic ProN", "Yu Gothic", "YuGothic", Meiryo,
    sans-serif;
  line-height: 1.8;
}

a {
  color: var(--ocean);
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--navy);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.header-inner {
  width: min(100% - 40px, var(--max-width));
  min-height: 70px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-name {
  color: var(--navy);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-decoration: none;
  white-space: nowrap;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.92rem;
}

.site-nav a {
  color: var(--ink);
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--ocean);
}

.container {
  width: min(100% - 40px, var(--max-width));
  margin: 0 auto;
}

.hero {
  padding: 72px 0 64px;
  background:
    linear-gradient(135deg, rgba(234, 246, 248, 0.92), rgba(255, 255, 255, 0.96)),
    var(--mist);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(250px, 0.65fr);
  align-items: center;
  gap: 64px;
}
　
.eyebrow {
  margin: 0 0 12px;
  color: var(--ocean);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  color: var(--navy);
  font-size: clamp(2.3rem, 5vw, 4.4rem);
  line-height: 1.15;
  letter-spacing: 0.03em;
}

.name-en {
  display: block;
  margin-top: 12px;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.25rem);
  font-weight: 500;
  letter-spacing: 0.08em;
}

.affiliation {
  margin: 26px 0 0;
  font-size: 1.05rem;
  line-height: 1.8;
}

.field {
  margin: 12px 0 0;
  color: var(--ocean);
  font-size: 1.05rem;
  font-weight: 700;
}

.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.button-link {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 8px 16px;
  border: 1px solid var(--ocean);
  border-radius: 999px;
  color: var(--ocean);
  font-size: 0.92rem;
  font-weight: 700;
  text-decoration: none;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.button-link:hover,
.button-link:focus-visible {
  color: var(--white);
  background: var(--ocean);
}

.hero-photo {
  justify-self: end;
  width: min(100%, 480px);
  margin: 0;
}

.hero-photo img {
  display: block;
  width: 100%;
  height: auto;
  border: 6px solid var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-photo figcaption {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.82rem;
  text-align: right;
}

.section {
  padding: 76px 0;
}

.section-alt {
  background: var(--mist);
}

.section-heading {
  margin: 0 0 28px;
  color: var(--navy);
  font-size: clamp(1.7rem, 3vw, 2.25rem);
  line-height: 1.35;
}

.lead {
  max-width: 900px;
  margin: 0;
  font-size: 1.06rem;
}

.theme-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.theme-card {
  padding: 30px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 8px 20px rgba(11, 45, 69, 0.05);
}

.theme-card h3 {
  margin: 0 0 16px;
  color: var(--navy);
  font-size: 1.25rem;
  line-height: 1.55;
}

.theme-card p {
  margin: 0 0 18px;
}

.theme-card ul {
  margin: 0;
  padding-left: 1.25em;
}

.theme-card li + li {
  margin-top: 10px;
}

.link-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.link-list a {
  display: inline-flex;
  align-items: center;
  min-height: 46px;
  padding: 9px 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--white);
  font-weight: 700;
  text-decoration: none;
}

.link-list a:hover,
.link-list a:focus-visible {
  border-color: var(--ocean);
  background: var(--ice);
}

.contact-box {
  max-width: 760px;
  padding: 28px 30px;
  border-left: 5px solid var(--ocean);
  background: var(--ice);
}

.contact-box p {
  margin: 0;
}

.contact-box p + p {
  margin-top: 10px;
}

.site-footer {
  padding: 28px 0;
  color: #dcecf1;
  background: var(--navy);
  font-size: 0.9rem;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 760px) {
  .header-inner {
    min-height: auto;
    padding: 14px 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .site-nav {
    flex-wrap: wrap;
    gap: 8px 16px;
  }

  .hero {
    padding: 52px 0;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

   .hero-photo {
    justify-self: start;
    width: min(100%, 420px);
  }

  .hero-photo figcaption {
    text-align: left;
  }

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

  .section {
    padding: 56px 0;
  }
}


/* Hero identity refinement */
.site-name { display: inline-flex; align-items: center; gap: 6px; }
.site-name svg { width: 18px; height: 18px; fill: currentColor; flex: 0 0 auto; }
.hero-text { max-width: 700px; }
.hero-identity { padding-bottom: 22px; border-bottom: 1px solid rgba(15, 95, 120, 0.22); }
.hero .eyebrow { margin: 0 0 4px; font-size: clamp(0.72rem, 1.35vw, 0.86rem); letter-spacing: 0.1em; line-height: 1.5; }
.hero .field { margin: 0 0 16px; color: var(--ocean); font-size: clamp(1rem, 1.8vw, 1.18rem); font-weight: 700; line-height: 1.55; }
.hero h1 { margin: 0; font-size: clamp(2.5rem, 4.7vw, 4.15rem); line-height: 1.1; letter-spacing: 0.02em; }
.hero .name-en { margin-top: 7px; font-size: clamp(0.98rem, 1.7vw, 1.18rem); letter-spacing: 0.065em; }
.hero .affiliation { margin: 20px 0 0; color: var(--ink); font-size: clamp(0.98rem, 1.45vw, 1.08rem); line-height: 1.75; }
@media (max-width: 760px) { .hero-identity { padding-bottom: 18px; } .hero .field { margin-bottom: 12px; } .hero .affiliation { margin-top: 16px; } }


/* Access map refinement */
.map-box { position: relative; overflow: hidden; padding: 8px; border: 1px solid rgba(15, 95, 120, .18); border-radius: var(--radius); box-shadow: 0 14px 30px rgba(11, 45, 69, .12); background: var(--white); }
.map-box iframe { display: block; width: 100%; height: 290px; border: 0; border-radius: calc(var(--radius) - 8px); transition: transform .35s ease; }
.map-box:hover iframe { transform: scale(1.018); }
.map-label { position: absolute; z-index: 1; top: 22px; left: 22px; display: flex; align-items: center; gap: 8px; padding: 8px 12px; border-radius: 9px; color: var(--navy); background: rgba(255,255,255,.93); box-shadow: 0 4px 14px rgba(11,45,69,.15); line-height: 1.25; }
.map-label span { color: var(--ocean); font-size: .85rem; }
.map-label small { display: block; color: var(--ocean); font-size: .65rem; font-weight: 700; letter-spacing: .12em; }
.map-label strong { display: block; margin-top: 2px; font-size: .78rem; }
.map-caption { position: absolute; z-index: 1; right: 20px; bottom: 20px; margin: 0; font-size: .82rem; }
.map-caption a { display: inline-block; padding: 7px 12px; border-radius: 999px; color: var(--navy); background: rgba(255,255,255,.93); box-shadow: 0 4px 14px rgba(11,45,69,.15); font-weight: 700; text-decoration: none; }
.map-caption a:hover, .map-caption a:focus-visible { color: var(--white); background: var(--ocean); }
@media (max-width: 768px) { .map-box iframe { height: 230px; } .map-label { top: 16px; left: 16px; } .map-caption { right: 16px; bottom: 16px; } .map-label strong { font-size: .72rem; } }