:root {
  --ink: #10284a;
  --muted: #5b6675;
  --line: #d6deea;
  --paper: #ffffff;
  --soft: #f4f7fb;
  --navy: #003f88;
  --navy-2: #0050a8;
  --accent: #005bac;
  --max: 1120px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
}

body {
  min-height: 100vh;
  color: var(--ink);
  background: var(--soft);
  font-family: Inter, Arial, Helvetica, sans-serif;
  font-size: 17px;
  line-height: 1.7;
}

a {
  color: inherit;
}

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

.site-header {
  background: linear-gradient(135deg, var(--navy), var(--navy-2));
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(var(--max), calc(100% - 48px));
  min-height: 104px;
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 16px;
  color: #fff;
  text-decoration: none;
}

.brand-seal {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.68);
  border-radius: 8px;
  font-size: 28px;
  font-weight: 900;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 28px;
  line-height: 1;
}

.brand small {
  margin-top: 7px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.majorana-sketch {
  flex: 1;
  display: flex;
  justify-content: flex-end;
  min-width: 260px;
  margin-left: 36px;
  color: rgba(255, 255, 255, 0.82);
}

.majorana-sketch svg {
  width: min(430px, 38vw);
  height: auto;
  overflow: visible;
}

.majorana-sketch .wire {
  fill: none;
  stroke: rgba(255, 255, 255, 0.38);
  stroke-width: 7;
  stroke-linecap: round;
}

.majorana-sketch .decay {
  fill: none;
  stroke: #d7dee9;
  stroke-width: 5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.majorana-sketch .left {
  stroke: #d7dee9;
}

.majorana-sketch .right {
  stroke: #b7d1ee;
}

.majorana-sketch .zero-mode {
  fill: #ffffff;
  stroke: #9fc3e8;
  stroke-width: 3;
}

.majorana-sketch text {
  fill: rgba(255, 255, 255, 0.78);
  font-size: 20px;
  font-weight: 800;
}

.nav-bar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.98);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 6px 18px rgba(23, 32, 51, 0.07);
}

.site-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  width: min(var(--max), calc(100% - 48px));
  min-height: 62px;
  margin: 0 auto;
}

.site-nav a {
  display: flex;
  align-items: center;
  min-height: 62px;
  padding: 0 14px;
  color: #2d3748;
  border-bottom: 3px solid transparent;
  font-size: 16px;
  font-weight: 800;
  text-decoration: none;
}

.site-nav a:first-child {
  padding-left: 0;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.42);
  border-radius: 6px;
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 6px auto;
  background: #fff;
}

.lang-toggle {
  min-width: 74px;
  height: 38px;
  margin-left: 22px;
  color: rgba(255, 255, 255, 0.9);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.34);
  border-radius: 6px;
  font: inherit;
  font-size: 14px;
  font-weight: 800;
  cursor: pointer;
}

.lang-toggle:hover {
  background: rgba(255, 255, 255, 0.16);
}

.page-shell {
  width: min(1280px, 100%);
  min-height: calc(100vh - 220px);
  margin: 0 auto;
  background: var(--paper);
}

.page-section {
  display: none;
  padding: 44px clamp(24px, 5vw, 72px) 72px;
}

.page-section.is-active {
  display: block;
}

.hero-banner {
  display: grid;
  align-items: end;
  min-height: 330px;
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(32px, 5vw, 58px);
  color: #fff;
  background:
    linear-gradient(110deg, rgba(0, 48, 108, 0.96) 0%, rgba(0, 63, 136, 0.84) 44%, rgba(0, 80, 168, 0.5) 100%),
    url("assets/hero-kagome-background.svg");
  background-position: center;
  background-size: cover;
  border-radius: 4px;
  overflow: hidden;
}

.hero-copy {
  position: relative;
  z-index: 2;
}

.hero-banner p,
.hero-banner h1,
.hero-banner span {
  display: block;
  margin: 0;
}

.hero-banner p {
  color: #d7dee9;
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hero-banner h1 {
  max-width: 780px;
  margin-top: 8px;
  font-size: clamp(42px, 6vw, 72px);
  line-height: 1.02;
}

.hero-banner span {
  max-width: 740px;
  margin-top: 16px;
  color: rgba(255, 255, 255, 0.84);
  font-size: 19px;
  font-weight: 700;
}

.home-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.14fr) minmax(300px, 0.86fr);
  gap: 38px;
  max-width: var(--max);
  margin: 38px auto 0;
}

.welcome-copy,
.news-panel,
.text-grid article,
.member-card,
.publication-list,
.news-list {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
}

.welcome-copy,
.news-panel {
  padding: 30px;
}

.welcome-copy h2,
.news-panel h2,
.section-title h1,
.text-grid h2,
.member-card h2 {
  margin: 0 0 14px;
  color: var(--ink);
  font-size: 28px;
  line-height: 1.24;
}

.welcome-copy p,
.news-panel p,
.section-title p,
.text-grid p,
.member-card p,
.publication-list li,
.news-list p {
  margin: 0 0 16px;
}

.welcome-copy > p,
.section-title p,
.text-grid p {
  color: var(--muted);
}

.pi-bio {
  display: block;
  margin: 24px 0;
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #f8fbff;
}

.pi-bio::after {
  content: "";
  display: block;
  clear: both;
}

.pi-bio img {
  float: left;
  width: min(42%, 230px);
  margin: 0 26px 16px 0;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  object-position: center top;
  border-radius: 6px;
}

.pi-bio h3 {
  margin: 0 0 12px;
  color: var(--ink);
  font-size: 22px;
  line-height: 1.3;
}

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

.pi-bio p:last-child {
  margin-bottom: 0;
}

.opening-box {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  gap: 22px;
  align-items: center;
  margin-top: 34px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.news-panel .opening-box {
  display: block;
  margin: 0 0 28px;
  padding: 0 0 26px;
  border-top: 0;
  border-bottom: 1px solid var(--line);
}

.opening-box img {
  width: 112px;
  height: 112px;
  object-fit: cover;
  object-position: center top;
  border-radius: 6px;
}

.opening-box h3 {
  margin: 0 0 6px;
  color: var(--accent);
  font-size: 24px;
  text-transform: uppercase;
}

.opening-box p,
.opening-box ul {
  margin: 0;
}

.opening-box ul {
  padding-left: 20px;
  color: var(--muted);
}

.opening-box a,
.accent-link,
.link-row a,
.member-card a {
  color: var(--accent);
  font-weight: 700;
}

.news-list.compact {
  padding: 0;
  border: 0;
}

.news-list strong {
  display: inline-block;
  min-width: 96px;
  color: var(--ink);
  font-weight: 900;
}

.section-title {
  max-width: var(--max);
  margin: 0 auto 28px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.section-title h1 {
  color: var(--navy);
  font-size: clamp(36px, 5vw, 58px);
}

.section-title p {
  max-width: 760px;
  font-size: 19px;
}

.research-directions {
  max-width: var(--max);
  margin: -6px auto 28px;
  padding: 0 0 0 28px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.75;
}

.research-directions li {
  margin-bottom: 10px;
  padding-left: 4px;
}

.research-directions strong {
  color: var(--navy);
  font-weight: 850;
}

.research-interest-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
  max-width: var(--max);
  margin: -6px auto 36px;
}

.research-interest-figures figure {
  margin: 0;
  padding: 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
  box-shadow: 0 14px 34px rgba(15, 37, 68, 0.08);
}

.research-interest-figures img {
  display: block;
  width: 100%;
  height: 360px;
  object-fit: contain;
}

.text-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  max-width: var(--max);
  margin: 0 auto;
}

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

.opening-apply-grid {
  grid-template-columns: minmax(0, 1.28fr) minmax(280px, 0.72fr);
  align-items: start;
}

.opening-apply-grid article:first-child {
  grid-column: 1 / -1;
}

.text-grid article {
  padding: 26px;
}

.text-grid article::before {
  content: "";
  display: block;
  width: 42px;
  height: 3px;
  margin-bottom: 18px;
  background: var(--accent);
}

.text-grid ul {
  margin: 0;
  padding-left: 22px;
  color: var(--muted);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  max-width: var(--max);
  margin: 0 auto;
}

.gallery-card {
  margin: 0;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: 0 14px 34px rgba(15, 37, 68, 0.08);
}

.gallery-placeholder {
  display: grid;
  place-items: center;
  min-height: 230px;
  padding: 24px;
  color: #fff;
  text-align: center;
  font-size: 24px;
  font-weight: 900;
  letter-spacing: 0.02em;
}

.gallery-sjtu {
  background:
    linear-gradient(135deg, rgba(0, 48, 108, 0.9), rgba(0, 82, 155, 0.74)),
    url("assets/hero-kagome-background.svg");
  background-position: center;
  background-size: cover;
}

.gallery-talk {
  background: linear-gradient(135deg, #0f2f5f, #58739a);
}

.gallery-life {
  background: linear-gradient(135deg, #00529b, #d8971b);
}

.gallery-card figcaption {
  min-height: 72px;
  padding: 16px 18px;
  color: var(--muted);
  font-weight: 750;
  line-height: 1.45;
}

.featured-research {
  display: grid;
  gap: 18px;
  max-width: var(--max);
  margin: 0 auto 34px;
}

.featured-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
}

.featured-heading h2 {
  margin: 0;
  color: var(--navy);
  font-size: 28px;
}

.featured-heading a {
  color: var(--accent);
  font-size: 15px;
  font-weight: 800;
  text-underline-offset: 3px;
}

.feature-row {
  display: grid;
  grid-template-columns: minmax(260px, 0.82fr) minmax(0, 1.18fr);
  gap: 28px;
  align-items: center;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
}

.feature-row.reverse {
  grid-template-columns: minmax(0, 1.18fr) minmax(260px, 0.82fr);
}

.feature-row.reverse .feature-art {
  order: 2;
}

.feature-row h3 {
  margin: 0 0 10px;
  color: var(--ink);
  font-size: 24px;
  line-height: 1.25;
}

.feature-row p {
  margin: 0 0 14px;
  color: var(--muted);
}

.feature-row .feature-refs {
  margin-bottom: 0;
  line-height: 1.75;
}

.feature-row a {
  color: var(--accent);
  font-weight: 800;
  text-underline-offset: 3px;
}

.contribution-note {
  display: inline-block;
  margin-left: 6px;
  color: var(--muted);
  font-size: 0.92em;
  font-weight: 700;
}

.feature-art {
  display: grid;
  place-items: center;
  min-height: 210px;
  background: #fff;
  border: 1px solid #d6e2f0;
  border-radius: 5px;
  text-decoration: none;
  transition: border-color 160ms ease, transform 160ms ease;
}

.feature-art:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.feature-art svg {
  width: 100%;
  max-width: 340px;
}

.feature-art img {
  width: 100%;
  height: 100%;
  max-height: 250px;
  object-fit: contain;
}

.feature-art img + svg {
  display: none;
}

.feature-insets {
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 8px;
}

.feature-art .feature-insets img {
  width: 100%;
  height: auto;
  max-height: 230px;
  object-fit: contain;
  background: #fff;
  border-radius: 4px;
}

.feature-art path {
  fill: none;
  stroke: var(--accent);
  stroke-width: 5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.feature-art .fine {
  stroke: #7c98bc;
  stroke-width: 2.2;
}

.feature-art .current,
.feature-art .field {
  stroke: #c9822a;
  stroke-width: 4;
}

.feature-art .wireline {
  stroke: #7c98bc;
  stroke-width: 8;
}

.feature-art circle {
  fill: #fff;
  stroke: var(--accent);
  stroke-width: 4;
}

.member-card {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: clamp(28px, 5vw, 56px);
  align-items: center;
  max-width: var(--max);
  margin: 0 auto 32px;
  padding: 34px;
}

.member-card img {
  width: 220px;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: 6px;
}

.member-info h2 {
  margin: 0 0 12px;
  font-size: clamp(28px, 3vw, 36px);
  line-height: 1.15;
}

.member-info p {
  margin: 0 0 7px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.5;
}

.member-info p:nth-child(2),
.member-info p:nth-child(3) {
  color: var(--ink);
  font-size: 20px;
  line-height: 1.35;
}

.profile-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 14px !important;
}

.profile-links a {
  color: var(--accent);
  font-size: 18px;
  font-weight: 800;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.link-row span {
  color: #9aa4ae;
  margin: 0 8px;
}

.publication-list {
  max-width: var(--max);
  margin: 0 auto;
  padding: 28px 34px 12px 54px;
}

.publication-list li {
  padding-left: 8px;
}

.news-list {
  max-width: var(--max);
  margin: 0 auto;
  padding: 28px 34px;
}

.link-row {
  max-width: var(--max);
  margin: 18px auto 0;
}

.site-footer {
  width: min(1280px, 100%);
  margin: 0 auto;
  padding: 18px 24px 30px;
  color: var(--muted);
  background: var(--paper);
  border-top: 1px solid var(--line);
  text-align: center;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }

  .header-inner {
    width: min(var(--max), calc(100% - 32px));
    min-height: 84px;
  }

  .brand strong {
    font-size: 24px;
  }

  .brand small {
    font-size: 12px;
  }

  .majorana-sketch {
    display: none;
  }

  .lang-toggle {
    margin-left: 10px;
  }

  .menu-toggle {
    display: block;
  }

  .nav-bar {
    position: static;
  }

  .site-nav {
    display: none;
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    min-height: 0;
    padding: 8px 20px 14px;
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a,
  .site-nav a:first-child {
    min-height: 44px;
    padding: 0 8px;
  }

  .hero-banner {
    grid-template-columns: 1fr;
    min-height: 250px;
    padding: 30px 24px;
  }

  .hero-banner p {
    font-size: 12px;
    letter-spacing: 0.14em;
  }

  .hero-banner h1 {
    max-width: 320px;
    font-size: 34px;
    line-height: 1.15;
  }

  .hero-banner span {
    margin-top: 12px;
    font-size: 16px;
  }

  .home-layout,
  .feature-row,
  .feature-row.reverse,
  .research-interest-figures,
  .gallery-grid,
  .text-grid,
  .text-grid.two,
  .member-card,
  .opening-box {
    grid-template-columns: 1fr;
  }

  .pi-bio img {
    float: none;
    width: min(100%, 260px);
    aspect-ratio: 4 / 3;
    margin: 0 auto 20px;
    object-position: center 18%;
  }

  .welcome-copy h2,
  .news-panel h2,
  .section-title h1,
  .text-grid h2,
  .member-card h2,
  .opening-box h3 {
    color: var(--navy);
    font-size: 30px;
    line-height: 1.22;
  }

  .welcome-copy,
  .news-panel,
  .text-grid article,
  .member-card {
    padding: 24px;
  }

  .news-list strong {
    min-width: 78px;
  }

  .member-info p:nth-child(2),
  .member-info p:nth-child(3),
  .member-info p {
    font-size: 16px;
  }

  .feature-row.reverse .feature-art {
    order: 0;
  }

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

  .research-interest-figures img {
    height: auto;
    max-height: 360px;
  }
}