:root {
  --ink: #17212b;
  --muted: #586675;
  --line: #cdd8dc;
  --paper: #e7ecec;
  --soft: #dfe8e7;
  --brand: #1f6f78;
  --brand-dark: #164954;
  --accent: #d8883d;
  --white: #ffffff;
  --shadow: 0 22px 70px rgba(23, 33, 43, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", "YuGothic", "Segoe UI", sans-serif;
  background: #d8e0df;
  line-height: 1.75;
}

body {
  margin: 0;
  background:
    linear-gradient(rgba(22, 73, 84, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(22, 73, 84, 0.07) 1px, transparent 1px),
    radial-gradient(circle at 18% 8%, rgba(216, 136, 61, 0.1), transparent 30%),
    linear-gradient(135deg, #eef1ee 0%, #d7e1df 52%, #c8d5d6 100%);
  background-size: 42px 42px, 42px 42px, auto, auto;
}

a {
  color: var(--brand);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
}

.site-header {
  align-items: center;
  background: rgba(239, 243, 242, 0.94);
  border-bottom: 1px solid var(--line);
  display: flex;
  gap: 24px;
  justify-content: space-between;
  padding: 18px clamp(20px, 5vw, 64px);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(14px);
}

.brand {
  align-items: center;
  color: var(--ink);
  display: inline-flex;
  font-weight: 800;
  gap: 12px;
  min-width: 220px;
}

.brand__mark {
  align-items: center;
  background: var(--brand-dark);
  border-radius: 8px;
  color: var(--white);
  display: inline-flex;
  font-size: 0.78rem;
  height: 34px;
  justify-content: center;
  padding: 0 10px;
  width: auto;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  justify-content: flex-end;
}

.site-nav a {
  color: var(--ink);
  font-size: 0.94rem;
  font-weight: 700;
}

.site-nav .lang-link {
  border: 1px solid var(--brand-dark);
  border-radius: 8px;
  color: var(--brand-dark);
  padding: 1px 9px;
}

.site-nav .lang-link:hover {
  background: var(--brand-dark);
  color: var(--white);
  text-decoration: none;
}

main {
  overflow: hidden;
}

.hero {
  align-items: center;
  background:
    linear-gradient(110deg, rgba(236, 241, 240, 0.92) 0%, rgba(226, 234, 233, 0.86) 58%, rgba(205, 219, 219, 0.76) 100%),
    url("../images/theory-field.svg");
  background-position: center;
  background-size: cover;
  display: grid;
  gap: clamp(28px, 5vw, 72px);
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.9fr);
  min-height: calc(50vh - 37px);
  padding: clamp(24px, 3.5vw, 48px) clamp(20px, 5vw, 64px);
}

.hero__content {
  max-width: 760px;
}

.hero__labcode {
  color: var(--brand-dark);
  font-size: clamp(2rem, 4vw, 4.4rem);
  font-weight: 900;
  line-height: 1;
  margin-bottom: 18px;
}

.hero .eyebrow {
  font-size: clamp(0.95rem, 1.4vw, 1.15rem);
  margin-bottom: 16px;
  text-transform: none;
}

.hero h1 {
  font-size: clamp(2.2rem, 4.2vw, 4.2rem);
}

.hero__location {
  color: var(--brand-dark);
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  font-weight: 800;
  margin: 18px 0 0;
}

.hero__location span {
  color: var(--accent);
  display: block;
  font-size: 0.86rem;
  margin-bottom: 4px;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  margin: 0 0 10px;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  font-size: clamp(2.4rem, 5vw, 5rem);
  line-height: 1.08;
  margin-bottom: 22px;
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  line-height: 1.2;
  margin-bottom: 14px;
}

h3 {
  font-size: 1.18rem;
  line-height: 1.35;
}

.hero__lead {
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.32rem);
  max-width: 680px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  align-items: center;
  background: var(--brand-dark);
  border: 1px solid var(--brand-dark);
  border-radius: 8px;
  color: var(--white);
  display: inline-flex;
  font-weight: 800;
  min-height: 46px;
  padding: 10px 18px;
}

.button:hover {
  background: var(--brand);
  text-decoration: none;
}

.button--ghost {
  background: transparent;
  color: var(--brand-dark);
}

.hero__image {
  border-radius: 28px;
  box-shadow: var(--shadow);
  width: 100%;
}

.section,
.page-header,
.article {
  padding: clamp(54px, 8vw, 108px) clamp(20px, 5vw, 64px);
}

.section {
  padding-block: clamp(27px, 4vw, 54px);
}

.section,
.article {
  background: rgba(239, 243, 242, 0.92);
}

.section--muted {
  background:
    linear-gradient(rgba(222, 232, 230, 0.94), rgba(222, 232, 230, 0.94)),
    url("../images/theory-field.svg");
  background-position: center;
  background-size: cover;
}

.section--projects {
  background: #dfe8e7;
  color: var(--ink);
}

.section--projects .eyebrow {
  color: var(--accent);
}

.section--projects .section__heading {
  color: var(--ink);
}

.section__heading {
  margin-bottom: 28px;
  max-width: 680px;
}

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

.feature,
.member-card,
.research-block,
.publication-list li {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 24px;
}

.feature {
  min-height: 230px;
}

.project-list {
  display: grid;
  gap: 12px;
  background: transparent;
  border: 0;
}

.project {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  display: grid;
  gap: 16px;
  grid-template-columns: 92px minmax(180px, 0.42fr) minmax(0, 1fr);
  padding: 24px 0;
}

.project span {
  color: var(--accent);
  font-weight: 900;
}

.project h3,
.project p {
  margin: 0;
}

.project p {
  color: var(--muted);
}

.feature p,
.member-card p,
.research-block p,
.publication-list p,
.page-header p,
.section--split p {
  color: var(--muted);
}

.member-card__link {
  display: inline-flex;
  font-weight: 900;
  margin-top: 8px;
}

.member-profile {
  align-items: start;
  display: grid;
  gap: 28px;
  grid-template-columns: 120px minmax(0, 1fr);
}

.member-profile__body {
  display: grid;
  gap: 18px;
  max-width: 980px;
}

.profile-block {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 26px;
}

.profile-block h2 {
  font-size: clamp(1.5rem, 2.6vw, 2.4rem);
}

.profile-block p:last-child {
  margin-bottom: 0;
}

.profile-markdown h1,
.profile-markdown h2,
.profile-markdown h3 {
  margin-top: 0;
}

.profile-markdown h1 {
  font-size: clamp(1.55rem, 2.4vw, 2.25rem);
  line-height: 1.15;
}

.profile-markdown ul,
.profile-markdown ol {
  color: var(--muted);
}

.profile-block--compact {
  max-width: 520px;
}

.avatar--large {
  font-size: 2rem;
  height: 96px;
  width: 96px;
}

.profile-photo {
  aspect-ratio: 1 / 1;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  object-fit: cover;
  width: 120px;
}

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

.news-item {
  align-items: baseline;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  display: grid;
  gap: 18px;
  grid-template-columns: 120px minmax(0, 1fr);
  padding: 18px 0;
}

.news-item time {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.event-list {
  display: grid;
  gap: 16px;
}

.event-item {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  display: grid;
  gap: 24px;
  grid-template-columns: 150px minmax(0, 1fr);
  padding: 26px;
}

.event-item time {
  color: var(--brand-dark);
  font-size: 1.2rem;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
}

.event-item h2 {
  font-size: clamp(1.35rem, 2vw, 1.9rem);
}

.event-item dl {
  display: grid;
  gap: 10px;
  margin: 18px 0 0;
}

.event-item dl div {
  display: grid;
  gap: 10px;
  grid-template-columns: 54px minmax(0, 1fr);
}

.event-item dt {
  color: var(--accent);
  font-weight: 900;
}

.event-item dd {
  color: var(--muted);
  margin: 0;
}

.section--split {
  align-items: center;
  display: grid;
  gap: 28px;
  grid-template-columns: minmax(0, 1fr) auto;
}

.page-header {
  background:
    linear-gradient(rgba(222, 232, 230, 0.92), rgba(222, 232, 230, 0.92)),
    url("../images/theory-field.svg");
  border-bottom: 1px solid var(--line);
  background-position: center;
  background-size: cover;
}

.page-header h1 {
  font-size: clamp(2.2rem, 4vw, 4rem);
}

.stack {
  display: grid;
  gap: 22px;
}

.research-block {
  display: grid;
  gap: 20px;
  grid-template-columns: minmax(220px, 0.55fr) minmax(0, 1fr);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  grid-column: 2;
  list-style: none;
  margin: 0;
  padding: 0;
}

.tag-list li {
  background: #edf4f7;
  border-radius: 999px;
  color: var(--brand-dark);
  font-size: 0.86rem;
  font-weight: 700;
  padding: 4px 12px;
}

.avatar {
  align-items: center;
  background: #9fb7b7;
  border-radius: 50%;
  color: #102c34;
  display: flex;
  font-size: 1.8rem;
  font-weight: 900;
  height: 68px;
  justify-content: center;
  margin-bottom: 18px;
  width: 68px;
}

.publication-list {
  display: grid;
  gap: 14px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.publication-search {
  display: grid;
  gap: 8px;
  margin-bottom: 18px;
  max-width: 960px;
}

.publication-search__controls {
  display: grid;
  gap: 12px;
  grid-template-columns: minmax(180px, 0.28fr) minmax(260px, 1fr);
}

.publication-search__field {
  display: grid;
  gap: 8px;
}

.publication-search__label {
  color: var(--brand-dark);
  font-weight: 900;
}

.publication-search__input,
.publication-search__select {
  appearance: none;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  font: inherit;
  min-height: 48px;
  padding: 10px 14px;
  width: 100%;
}

.publication-search__select {
  background-image:
    linear-gradient(45deg, transparent 50%, var(--brand-dark) 50%),
    linear-gradient(135deg, var(--brand-dark) 50%, transparent 50%);
  background-position:
    calc(100% - 18px) 20px,
    calc(100% - 12px) 20px;
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
  padding-right: 38px;
}

.publication-search__input:focus,
.publication-search__select:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(31, 111, 120, 0.16);
  outline: none;
}

.publication-search__status {
  color: var(--muted);
  font-size: 0.92rem;
  margin: 0;
}

.publication-list__meta {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 8px;
}

.publication-list__year {
  color: var(--accent);
  display: inline-flex;
  font-weight: 900;
}

.publication-list__title {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.publication-list__bibtex {
  align-items: center;
  background: #eef5f4;
  border: 1px solid #c7d8d6;
  border-radius: 4px;
  color: #1f5557;
  display: inline-flex;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.72rem;
  font-weight: 900;
  line-height: 1;
  padding: 5px 7px;
  text-decoration: none;
}

.publication-list__bibtex:hover {
  background: #dfeceb;
  transform: translateY(-1px);
}

.publication-list__type {
  background: #263f45;
  border-radius: 4px;
  color: #f5faf9;
  display: inline-flex;
  font-size: 0.72rem;
  font-weight: 900;
  line-height: 1;
  padding: 5px 7px;
}

.bibtex-entry {
  background: #f7faf9;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow-x: auto;
  padding: 20px;
}

.bibtex-entry pre {
  margin: 0;
}

.bibtex-entry code {
  font-size: 0.92rem;
  line-height: 1.65;
  white-space: pre;
}

.contact-list {
  display: grid;
  gap: 12px;
}

.map-panel {
  align-items: center;
  aspect-ratio: 4 / 3;
  background: #edf3f5;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--brand-dark);
  display: flex;
  flex-direction: column;
  font-size: 1.6rem;
  font-weight: 900;
  gap: 10px;
  justify-content: center;
  min-width: min(420px, 100%);
  text-align: center;
  text-decoration: none;
  text-shadow: none;
}

.map-panel small {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

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

.join-grid article {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 26px;
}

.join-grid ul,
.flow-list {
  color: var(--muted);
  margin-bottom: 0;
  padding-left: 1.2rem;
}

.flow-list {
  display: grid;
  gap: 14px;
  list-style: none;
  margin: 0 0 28px;
  padding-left: 0;
}

.flow-list li {
  align-items: baseline;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  display: grid;
  gap: 12px;
  grid-template-columns: 220px minmax(0, 1fr);
  padding: 18px 20px;
}

.flow-list strong {
  color: var(--ink);
}

.article {
  margin: 0 auto;
  max-width: 860px;
}

.article h1 {
  font-size: clamp(2rem, 4vw, 3.4rem);
}

.back-link {
  display: inline-block;
  font-weight: 800;
  margin-bottom: 30px;
}

.site-footer {
  align-items: center;
  background: var(--ink);
  color: rgba(255, 255, 255, 0.78);
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  justify-content: space-between;
  padding: 28px clamp(20px, 5vw, 64px);
}

.site-footer p {
  margin: 0;
}

@media (max-width: 860px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

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

  .hero,
  .section--split,
  .research-block,
  .project,
  .join-grid,
  .flow-list li,
  .event-item,
  .member-profile,
  .publication-search__controls {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero__image {
    max-height: 420px;
    object-fit: cover;
  }

  .feature-grid,
  .member-grid {
    grid-template-columns: 1fr;
  }

  .tag-list {
    grid-column: auto;
  }
}

@media (max-width: 560px) {
  .brand {
    min-width: 0;
  }

  .site-nav a {
    font-size: 0.9rem;
  }

  .news-item {
    gap: 4px;
    grid-template-columns: 1fr;
  }

  .button {
    justify-content: center;
    width: 100%;
  }
}