:root {
  --ink: #17211f;
  --muted: #5d6965;
  --paper: #f7f6f1;
  --mist: #e8eee9;
  --moss: #305348;
  --copper: #b9643c;
  --sea: #236a7c;
  --line: rgba(23, 33, 31, .14);
  --shadow: 0 18px 50px rgba(23, 33, 31, .14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  line-height: 1.75;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(18px, 4vw, 56px);
  background: rgba(247, 246, 241, .88);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  min-width: 220px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  color: #fff;
  background: var(--moss);
  font-weight: 800;
  letter-spacing: .02em;
}

.brand strong,
.brand small {
  display: block;
  line-height: 1.2;
}

.brand small {
  color: var(--muted);
  font-size: 12px;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px 20px;
  color: var(--muted);
  font-size: 14px;
}

.site-nav a {
  text-decoration: none;
}

.site-nav a:hover {
  color: var(--copper);
}

.hero {
  position: relative;
  min-height: 78vh;
  display: grid;
  align-items: end;
  overflow: hidden;
  background: #17211f;
}

.hero img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.9) contrast(1.05);
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(5, 13, 12, .82), rgba(5, 13, 12, .44) 48%, rgba(5, 13, 12, .14));
}

.hero-overlay {
  position: relative;
  z-index: 1;
  width: min(980px, 100%);
  padding: 18vh clamp(18px, 6vw, 80px) 15vh;
  color: #fff;
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: var(--copper);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.hero h1,
.page-hero h1 {
  margin: 0;
  max-width: 880px;
  font-size: clamp(42px, 7vw, 92px);
  line-height: 1.04;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 760px;
  margin: 28px 0 0;
  color: rgba(255, 255, 255, .86);
  font-size: clamp(16px, 2vw, 21px);
}

.hero-actions,
.contact-band {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-actions {
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 18px;
  border: 1px solid currentColor;
  text-decoration: none;
  font-weight: 700;
}

.button.primary {
  color: #fff;
  background: var(--copper);
  border-color: var(--copper);
}

.button.secondary {
  color: #fff;
  background: rgba(255, 255, 255, .12);
  border-color: rgba(255, 255, 255, .44);
}

.button.secondary.dark {
  color: var(--moss);
  background: #fff;
  border-color: var(--line);
}

.quick-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.quick-stats article {
  padding: clamp(18px, 3vw, 34px);
  border-right: 1px solid var(--line);
}

.quick-stats article:last-child {
  border-right: 0;
}

.quick-stats strong {
  display: block;
  color: var(--moss);
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1;
}

.quick-stats span {
  color: var(--muted);
  font-size: 14px;
}

.section {
  padding: clamp(64px, 9vw, 128px) clamp(18px, 5vw, 72px);
}

.intro-grid,
.image-feature,
.split-band,
.two-column {
  display: grid;
  grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
  gap: clamp(28px, 6vw, 78px);
  align-items: start;
}

.section h2 {
  margin: 0;
  font-size: clamp(30px, 5vw, 58px);
  line-height: 1.12;
  letter-spacing: 0;
}

.lead-text {
  color: var(--muted);
  font-size: 18px;
}

.lead-text p:first-child {
  margin-top: 0;
}

.image-feature {
  background: var(--mist);
}

.feature-media img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  box-shadow: var(--shadow);
}

.feature-copy p:not(.section-kicker) {
  color: var(--muted);
}

.theme-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 26px;
}

.theme-list a {
  padding: 13px 14px;
  background: #fff;
  border: 1px solid var(--line);
  text-decoration: none;
  font-weight: 700;
}

.theme-list a:hover {
  color: #fff;
  background: var(--moss);
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.research-card {
  min-height: 340px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: #fff;
  border: 1px solid var(--line);
  overflow: hidden;
}

.research-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.research-card div {
  padding: 24px;
}

.research-card span {
  color: var(--sea);
  font-weight: 800;
}

.research-card h3 {
  margin: 8px 0 10px;
  font-size: 23px;
  line-height: 1.2;
}

.research-card p {
  margin: 0;
  color: var(--muted);
}

.card-link {
  display: inline-block;
  margin-top: 18px;
  color: var(--copper);
  font-weight: 800;
  text-decoration: none;
  border-bottom: 2px solid currentColor;
}

.split-band {
  background: var(--moss);
  color: #fff;
}

.split-band p {
  color: rgba(255, 255, 255, .78);
}

.profile {
  margin: 0;
  justify-self: end;
}

.profile img {
  width: min(360px, 100%);
  aspect-ratio: 4 / 5;
  object-fit: cover;
  box-shadow: var(--shadow);
}

.profile figcaption {
  margin-top: 10px;
  color: rgba(255, 255, 255, .72);
  font-size: 13px;
}

.timeline {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: clamp(28px, 6vw, 78px);
  background: #fff;
}

.timeline-heading p:not(.section-kicker) {
  color: var(--muted);
}

.timeline-items {
  display: grid;
  gap: 14px;
}

.timeline-items article {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 18px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.timeline-label {
  color: var(--copper);
  font-weight: 800;
}

.timeline-items p {
  margin: 0;
  color: var(--muted);
}

.publication-preview {
  background: var(--paper);
}

.publication-toolbar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 24px;
}

.count-pill {
  padding: 8px 12px;
  color: var(--moss);
  border: 1px solid var(--line);
  background: #fff;
  font-weight: 800;
}

.publication-list {
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.publication-list li {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 18px;
  padding: 18px;
  background: #fff;
  border: 1px solid var(--line);
  color: var(--muted);
}

.publication-list span {
  color: var(--sea);
  font-weight: 900;
}

.publication-list.compact {
  max-width: 1000px;
}

.achievement-callout {
  max-width: 900px;
  margin-top: 26px;
  padding: 26px;
  color: var(--muted);
  background: #fff;
  border: 1px solid var(--line);
}

.achievement-callout p {
  margin: 0;
}

.text-link {
  display: inline-block;
  margin-top: 24px;
  color: var(--copper);
  font-weight: 800;
  text-decoration: none;
  border-bottom: 2px solid currentColor;
}

.text-link.light {
  color: #fff;
}

.contact-band {
  justify-content: space-between;
  background: #17211f;
  color: #fff;
}

.contact-band p:not(.section-kicker) {
  max-width: 780px;
  color: rgba(255, 255, 255, .75);
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 28px clamp(18px, 5vw, 72px);
  color: var(--muted);
  background: #fff;
  border-top: 1px solid var(--line);
}

.site-footer a {
  text-decoration: none;
  font-weight: 800;
}

.redirect-page {
  min-height: 100vh;
  background:
    linear-gradient(90deg, rgba(23, 33, 31, .88), rgba(23, 33, 31, .52)),
    url("assets/field-fault.jpg") center / cover;
}

.redirect-shell {
  min-height: 100vh;
  display: grid;
  align-items: center;
  padding: clamp(20px, 5vw, 72px);
}

.redirect-panel {
  max-width: 760px;
  padding: clamp(28px, 5vw, 56px);
  color: #fff;
  background: rgba(247, 246, 241, .92);
  color: var(--ink);
  box-shadow: var(--shadow);
}

.redirect-panel h1 {
  margin: 0;
  font-size: clamp(38px, 7vw, 72px);
  line-height: 1.06;
}

.redirect-panel p:not(.eyebrow) {
  color: var(--muted);
  font-size: 18px;
}

.redirect-en {
  margin-top: 8px;
}

.page-hero {
  padding: clamp(86px, 12vw, 150px) clamp(18px, 5vw, 72px) clamp(54px, 8vw, 96px);
  color: #fff;
  background: #17211f;
}

.compact-hero {
  padding-bottom: 52px;
}

.archive-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.archive-nav a {
  padding: 9px 12px;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, .25);
  text-decoration: none;
}

.page-hero p:not(.eyebrow) {
  max-width: 760px;
  color: rgba(255, 255, 255, .78);
  font-size: 18px;
}

.clean-list {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.clean-list li {
  padding: 16px 0;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.two-column article {
  padding: 32px;
  background: #fff;
  border: 1px solid var(--line);
}

.two-column p:not(.section-kicker) {
  color: var(--muted);
}

.archive-section:nth-of-type(odd) {
  background: #fff;
}

.archive-list {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.archive-list li {
  padding: 16px 18px;
  background: #fff;
  border: 1px solid var(--line);
  color: var(--muted);
}

.archive-section:nth-of-type(odd) .archive-list li {
  background: var(--paper);
}

.meeting-year-grid {
  display: grid;
  gap: 18px;
  margin-top: 28px;
}

.meeting-year-card {
  padding: clamp(22px, 4vw, 34px);
  background: #fff;
  border: 1px solid var(--line);
}

.archive-section:nth-of-type(odd) .meeting-year-card {
  background: var(--paper);
}

.meeting-year-card h3 {
  margin: 0 0 16px;
  color: var(--moss);
  font-size: clamp(24px, 4vw, 38px);
  line-height: 1.1;
}

.meeting-year-card ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.meeting-year-card li {
  padding-top: 10px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.research-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, .9fr);
  min-height: 58vh;
  color: #fff;
  background: #17211f;
}

.research-hero img {
  width: 100%;
  height: 100%;
  min-height: 360px;
  object-fit: cover;
}

.research-hero div {
  align-self: end;
  padding: clamp(36px, 6vw, 72px);
}

.research-hero h1,
.cv-hero h1 {
  margin: 0;
  font-size: clamp(42px, 7vw, 78px);
  line-height: 1.04;
}

.research-hero p:not(.eyebrow) {
  color: rgba(255, 255, 255, .76);
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: clamp(32px, 6vw, 80px);
  align-items: start;
}

.article-layout article {
  max-width: 860px;
}

.article-layout h2 {
  margin-top: 0;
  font-size: clamp(28px, 4vw, 46px);
}

.article-layout p {
  color: var(--muted);
  font-size: 18px;
}

.article-nav {
  position: sticky;
  top: 96px;
  display: grid;
  gap: 10px;
}

.article-nav a {
  padding: 13px 14px;
  background: #fff;
  border: 1px solid var(--line);
  text-decoration: none;
  font-weight: 800;
}

.cv-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: clamp(28px, 5vw, 72px);
  align-items: end;
  padding: clamp(80px, 11vw, 140px) clamp(18px, 5vw, 72px) clamp(48px, 8vw, 88px);
  color: #fff;
  background: #17211f;
}

.cv-hero h1 span {
  color: rgba(255, 255, 255, .62);
  font-size: .48em;
}

.cv-hero p:not(.eyebrow) {
  max-width: 760px;
  color: rgba(255, 255, 255, .76);
  font-size: 18px;
}

.cv-hero img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
}

.cv-grid {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: clamp(30px, 6vw, 80px);
}

.cv-summary {
  position: sticky;
  top: 96px;
  padding: 28px;
  background: #fff;
  border: 1px solid var(--line);
}

.cv-summary h2,
.cv-main h2 {
  font-size: clamp(26px, 4vw, 42px);
}

.cv-summary dl {
  margin: 0;
}

.cv-summary dt {
  margin-top: 18px;
  color: var(--copper);
  font-weight: 800;
}

.cv-summary dd {
  margin: 4px 0 0;
  color: var(--muted);
}

.cv-main {
  display: grid;
  gap: 64px;
}

.cv-list {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
}

.cv-list li {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 20px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.cv-list time {
  color: var(--sea);
  font-weight: 900;
}

.cv-list span {
  color: var(--muted);
}

@media (max-width: 920px) {
  .site-header,
  .intro-grid,
  .image-feature,
  .split-band,
  .timeline,
  .two-column,
  .research-hero,
  .article-layout,
  .cv-hero,
  .cv-grid {
    grid-template-columns: 1fr;
  }

  .site-header {
    display: grid;
    align-items: start;
  }

  .site-nav {
    justify-content: start;
  }

  .quick-stats,
  .cards-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .profile {
    justify-self: start;
  }

  .article-nav,
  .cv-summary {
    position: static;
  }
}

@media (max-width: 620px) {
  .hero {
    min-height: 76vh;
  }

  .hero::after {
    background: rgba(5, 13, 12, .7);
  }

  .hero-overlay {
    padding-top: 20vh;
  }

  .quick-stats,
  .cards-grid,
  .theme-list {
    grid-template-columns: 1fr;
  }

  .quick-stats article {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .timeline-items article,
  .publication-list li,
  .cv-list li {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .site-footer,
  .publication-toolbar {
    align-items: start;
    flex-direction: column;
  }
}