@font-face {
  font-family: "JetBrains Sans";
  src: url("fonts/JetBrainsSans-Regular.woff2");
}

:root {
  --bg: #f4f6f5;
  --surface: #ffffff;
  --surface-soft: #f9fbfa;
  --text: #17201c;
  --muted: #5d6a65;
  --line: #d9e2de;
  --line-strong: #c3d0ca;
  --accent: #0f6a4a;
  --accent-soft: #e6f3ed;
  --focus: 0 0 0 3px rgba(15, 106, 74, 0.18);
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 10px;
  --shadow: 0 12px 36px rgba(16, 35, 27, 0.06);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
  font-family: "JetBrains Sans", "Segoe UI", sans-serif;
  color: var(--text);
  line-height: 1.6;
  background:
    radial-gradient(1000px 460px at 10% -5%, #ffffff, transparent 55%),
    linear-gradient(180deg, #eef2f0 0%, var(--bg) 30%, #f5f7f6 100%);
}

html:lang(ja) body {
  font-family: "Yu Gothic UI", "Meiryo", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
}

.site-shell {
  max-width: 1140px;
  margin: 0 auto;
  min-height: 100vh;
  padding: 0 1.2rem;
  display: flex;
  flex-direction: column;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.65rem 1rem;
  padding: 0.95rem 1.1rem;
  margin-top: 0.9rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.brand {
  color: var(--text);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.62rem;
  margin-right: auto;
  min-width: 220px;
}

.brand-logo {
  width: 44px;
  height: auto;
  flex: 0 0 auto;
}

.brand-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.brand-line {
  font-size: 0.82rem;
  line-height: 1.18;
  letter-spacing: 0.01em;
  font-weight: 650;
}

.brand-line-main {
  font-size: 0.98rem;
  font-weight: 680;
  line-height: 1.15;
}

.brand-line-sub {
  color: var(--muted);
  font-size: 0.73rem;
  font-weight: 540;
}

.site-nav {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
  margin-left: auto;
}

.nav-link {
  text-decoration: none;
  color: var(--text);
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.92rem;
  transition: 160ms ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent);
  background: var(--accent-soft);
  border-color: #cee2d9;
}

.home-pictogram {
  font-size: 1.05rem;
  line-height: 1;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.18rem;
  background: var(--surface);
  margin-left: 0.2rem;
}

.lang-btn {
  border: none;
  background: transparent;
  color: var(--muted);
  border-radius: 999px;
  cursor: pointer;
  padding: 0.2rem 0.54rem;
  font: inherit;
  font-size: 0.8rem;
  line-height: 1.2;
}

.lang-btn:hover {
  color: var(--text);
}

.lang-btn.is-active {
  color: var(--accent);
  background: var(--accent-soft);
  font-weight: 620;
}

.nav-toggle {
  display: none;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  padding: 0.38rem 0.7rem;
  cursor: pointer;
  font: inherit;
}

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

.nav-link:focus-visible,
.nav-toggle:focus-visible,
.card a:focus-visible,
.feat-paper-link:focus-visible,
.feat-paper-btn:focus-visible,
.member-link:focus-visible,
.lang-btn:focus-visible {
  outline: none;
  box-shadow: var(--focus);
}

.content {
  flex: 1;
  padding: 1.6rem 0 2.25rem;
  animation: fade-up 360ms ease-out both;
}

.hero {
  background: linear-gradient(180deg, var(--surface) 0%, var(--surface-soft) 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: clamp(1.25rem, 2.4vw, 2rem);
  max-width: 860px;
}

.home-hero {
  --hero-parallax-offset: 0px;
  position: relative;
  overflow: hidden;
  border-color: #b7cfc5;
  max-width: none;
  width: 100%;
  min-height: clamp(280px, 42vw, 460px);
  padding: clamp(1.4rem, 4vw, 3rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.home-hero::before,
.home-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.home-hero::before {
  background-image: url("../img/green_materials_bg_grid.jpg");
  background-size: 120% auto;
  background-position: center calc(50% + var(--hero-parallax-offset));
  transform: scale(1.12);
  filter: saturate(0.95);
}

.home-hero::after {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.84) 0%, rgba(249, 251, 250, 0.76) 100%);
}

.home-hero > * {
  position: relative;
  z-index: 1;
}

.hero h1 {
  margin-top: 0.8rem;
  margin-bottom: 0.8rem;
  line-height: 1.15;
  font-size: clamp(1.75rem, 4.3vw, 3.1rem);
  letter-spacing: -0.02em;
}

.hero p {
  margin: 0;
  color: var(--muted);
  max-width: 70ch;
  font-size: 1.04rem;
}

.hero-tag {
  display: inline-block;
  margin: 0 0 0.9rem;
  padding: 0.34rem 0.66rem;
  border-radius: 999px;
  border: 1px solid #cfe1d8;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  /*text-transform: uppercase;*/
}

.card-grid {
  margin-top: 1.2rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 0.9rem;
}

.news-strip {
  margin-top: 1rem;
  border-top: none;
  border-bottom: none;
  padding: 0.85rem 0;
}

.news-strip-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.8rem;
  margin-bottom: 0.5rem;
}

.news-strip-head h2 {
  margin: 0;
  font-size: 1.02rem;
  letter-spacing: 0.01em;
}

.news-archive-link {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.84rem;
}

.news-archive-link:hover {
  text-decoration: underline;
}

.news-list {
  display: grid;
  gap: 0.65rem;
}

.news-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 0.7rem;
  padding-top: 0.6rem;
  border-top: 1px solid var(--line);
}

.news-item:first-child {
  border-top: none;
  padding-top: 0;
}

.news-strip .news-item:last-child {
  border-bottom: none;
}

.news-date {
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
}

.news-body {
  border-left: 1px solid var(--accent);
  padding-left: 0.7rem;
}

.news-body p {
  margin: 0;
  font-size: 0.9rem;
}

.news-title {
  color: var(--text);
  font-weight: 620;
}

.news-body p + p {
  margin-top: 0.2rem;
}

.news-body a {
  color: var(--accent);
  text-decoration: none;
}

.news-body a:hover {
  text-decoration: underline;
}

.news-actions {
  margin-top: 0.32rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.news-actions .feat-paper-link:hover,
.news-actions .feat-paper-btn:hover {
  text-decoration: none;
}

.news-thumb {
  margin-top: 0.35rem;
  max-width: 220px;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: block;
}

.news-image-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.news-archive {
  margin-top: 0.9rem;
}

.news-archive .news-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 0.85rem 0.95rem;
}

.news-archive .news-item:first-child {
  border-top: 1px solid var(--line);
  padding-top: 0.85rem;
}

.news-year-section + .news-year-section {
  margin-top: 1.1rem;
}

.news-year-heading {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  color: var(--accent);
  letter-spacing: 0.03em;
}

.card,
.list-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: 0 6px 24px rgba(22, 37, 30, 0.04);
  padding: 1.05rem 1.05rem 1rem;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.card:hover,
.list-item:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
  box-shadow: 0 14px 28px rgba(16, 36, 28, 0.08);
}

.card h2,
.list-item h2 {
  margin-top: 0;
  margin-bottom: 0.6rem;
  font-size: 1.08rem;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.list-item h3 {
  margin: 1rem 0 0.45rem;
  font-size: 0.92rem;
  color: var(--accent);
  letter-spacing: 0.02em;
}

.card p,
.list-item p {
  margin-top: 0;
  color: var(--muted);
  margin-bottom: 0.5rem;
}

.card a,
.list-item a {
  color: var(--accent);
  font-weight: 620;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 160ms ease;
}

.card a:hover,
.list-item a:hover {
  border-color: color-mix(in srgb, var(--accent) 45%, transparent);
}

body[data-i18n-title="title.home"] .home-feature-card {
  grid-column: 1 / -1;
}

.home-feature-video {
  display: block;
  width: 100%;
  margin-top: 0.6rem;
  border: 0;
  border-radius: 10px;
  background: transparent;
}

.atom-probe-video {
  width: 50%;
}

.facility-media {
  margin-top: 0.55rem;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.5rem;
}

.facility-media-single {
  grid-template-columns: 1fr;
  max-width: 340px;
}

.facility-media img {
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: block;
}

.facility-card {
  padding: 0;
  overflow: hidden;
}

.facility-block + .facility-block {
  margin-top: 1.1rem;
}

.facility-block-title {
  margin: 0;
  font-size: 1.08rem;
  color: var(--accent);
  letter-spacing: 0.02em;
}

.facility-block .card-grid {
  margin-top: 0.65rem;
}

.facility-card-link {
  display: block;
  color: inherit;
  text-decoration: none;
  padding: 0.9rem;
}

.facility-card-link,
.facility-card-link * {
  transition: none !important;
}

.facility-card-image {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: block;
}

.facility-card-title {
  margin: 0.55rem 0 0.25rem;
  font-size: 1.02rem;
  line-height: 1.3;
  color: #000;
}

.facility-card-meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.facility-card-cta {
  margin: 0.4rem 0 0;
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 500;
}

.facility-list {
  margin: 0.35rem 0 0;
  padding-left: 1.1rem;
  color: var(--muted);
}

.facility-list li {
  margin: 0.15rem 0;
  line-height: 1.5;
}

.facility-list a {
  color: var(--accent);
  text-decoration: none;
}

.facility-list a:hover {
  text-decoration: underline;
}

.page-heading h1 {
  margin: 0;
  font-size: clamp(1.5rem, 3.8vw, 2.35rem);
  letter-spacing: -0.02em;
}

.page-heading p {
  margin-top: 0.5rem;
  color: var(--muted);
  max-width: 68ch;
}

.page-heading p a {
  color: var(--accent);
  text-decoration: none;
}

.page-heading p a:hover {
  color: #0b593d;
  text-decoration: underline;
}

.page-heading-publications {
  padding-top: 0.9rem;
}

.list-grid {
  margin-top: 1.15rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 0.9rem;
}

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

.students-list {
  grid-template-columns: 1fr;
}

.research-content {
  position: relative;
  overflow: visible;
}

.research-content::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 clamp(-10rem, -8vw, -4rem);
  width: clamp(22rem, 50vw, 60rem);
  background-image: url("../img/permanent_magnets.png");
  background-repeat: no-repeat;
  background-position: left top 10rem;
  background-size: auto min(78%, 50rem);
  opacity: 0.5;
  pointer-events: none;
  z-index: 0;
  transform: translate3d(0, var(--research-parallax-offset, 0px), 0);
  will-change: transform;
}

.research-content > * {
  position: relative;
  z-index: 1;
}

.research-content .list-item {
  background: color-mix(in srgb, var(--surface) 82%, transparent);
}

@media (max-width: 720px) {
  .research-content::before {
    display: none;
  }

  .research-list {
    width: 100%;
  }

}

.people-layout {
  margin-top: 1rem;
}

.leader-profile {
  background: linear-gradient(180deg, #fdfefe 0%, #f2f7f4 100%);
  border: 1px solid #c9dbd2;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 26px rgba(18, 37, 29, 0.08);
  padding: 1.2rem;
}

.people-kicker {
  margin: 0 0 0.35rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.leader-profile h2 {
  margin: 0;
  font-size: clamp(1.2rem, 2.4vw, 1.65rem);
  letter-spacing: -0.01em;
}

.leader-head {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.leader-photo {
  width: clamp(150px, 22vw, 200px);
  height: clamp(150px, 22vw, 200px);
  border-radius: 16px;
  object-fit: cover;
  border: 3px solid #d0e2da;
  box-shadow: 0 8px 24px rgba(10, 28, 21, 0.16);
  flex: 0 0 auto;
}

.people-role {
  margin: 0.32rem 0 0.5rem;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 620;
}

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

.members-title {
  margin: 1.2rem 0 0.7rem;
  font-size: 1.03rem;
}

.member-group-title {
  margin: 1rem 0 0.55rem;
  font-size: 0.92rem;
  color: var(--accent);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.member-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(245px, 1fr));
  gap: 0.85rem;
}

.member-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: 0 6px 22px rgba(16, 33, 26, 0.05);
  padding: 0.95rem;
}

.member-card h3 {
  margin: 0;
  font-size: 1rem;
}

.member-card-head {
  margin-bottom: 0.5rem;
}

.member-photo {
  width: 85px;
  height: 85px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid #d3e2db;
  box-shadow: 0 4px 14px rgba(17, 36, 27, 0.12);
}

.member-photo.placeholder {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 650;
  color: var(--accent);
  background: #eef5f1;
}

.member-card p {
  margin: 0.4rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.55;
}

.member-desc {
  margin-top: 0.34rem;
}

.member-links {
  margin-top: 0.45rem;
  display: inline-flex;
  gap: 0.5rem;
}

.member-link {
  width: 1.6rem;
  height: 1.6rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  border: none;
  border-radius: 0;
  background-color: transparent;
  font-size: 0;
  line-height: 1;
  color: var(--text);
  position: relative;
  background-repeat: no-repeat;
  background-position: center;
  background-size: 100% 100%;
}

.member-link[aria-label="Samurai profile"] {
  background-image: url("../img/pictograms/samurai.png");
}

.member-link[aria-label="Samurai profile"]:hover,
.member-link[aria-label="Samurai profile"]:focus-visible {
  background-image: url("../img/pictograms/samurai_hov.png");
}

.member-link[aria-label="Personal page"] {
  background-image: url("../img/pictograms/personal.png");
}

.member-link[aria-label="Personal page"]:hover,
.member-link[aria-label="Personal page"]:focus-visible {
  background-image: url("../img/pictograms/personal_hov.png");
}

.member-link[aria-label="ORCID"] {
  background-image: url("../img/pictograms/ID.png");
}

.member-link[aria-label="Google Scholar"] {
  background-image: url("../img/pictograms/GogScholar.png");
}

.member-link[aria-label="Email"] {
  background-image: url("../img/pictograms/email.png");
}



.member-link[aria-label="ORCID"]:hover,
.member-link[aria-label="ORCID"]:focus-visible {
  background-image: url("../img/pictograms/ID_hov.png");
}

.member-link[aria-label="Google Scholar"]:hover,
.member-link[aria-label="Google Scholar"]:focus-visible {
  background-image: url("../img/pictograms/GogScholar_hov.png");
}

.member-link[aria-label="Email"]:hover,
.member-link[aria-label="Email"]:focus-visible {
  background-image: url("../img/pictograms/email_hov.png");
}

.member-link:hover {
  transform: translateY(-1px);
}

.tech-list {
  margin: 0.2rem 0 0;
  padding-left: 1.15rem;
}

.tech-list li {
  margin: 0.18rem 0;
  font-size: 0.9rem;
}

.profile-layout {
  margin-top: 1rem;
  display: grid;
  gap: 1rem;
}

.profile-summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 0.9rem;
}

.profile-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: 0 6px 22px rgba(16, 33, 26, 0.05);
  padding: 1rem 1.1rem;
}

.profile-panel h2,
.profile-panel h3 {
  margin: 0 0 0.65rem;
  font-size: 1rem;
}

.profile-panel > :last-child {
  margin-bottom: 0;
}

.profile-facts {
  display: grid;
  gap: 0.7rem;
}

.profile-fact {
  display: grid;
  gap: 0.16rem;
}

.profile-fact-label {
  margin: 0;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent);
}

.profile-fact-value {
  margin: 0;
  color: var(--text);
  font-size: 0.92rem;
  line-height: 1.55;
}

.profile-list {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--text);
}

.profile-list li + li {
  margin-top: 0.42rem;
}

.profile-list a,
.timeline-list a,
.pub-source-item a {
  color: var(--accent);
}

.timeline-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.72rem;
}

.timeline-item {
  padding-top: 0.72rem;
  border-top: 1px solid var(--line);
}

.timeline-item:first-child {
  padding-top: 0;
  border-top: none;
}

.timeline-meta {
  margin: 0 0 0.14rem;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 680;
  letter-spacing: 0.03em;
}

.timeline-title {
  margin: 0;
  color: var(--text);
  font-size: 0.94rem;
  line-height: 1.5;
}

.page-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 0.9rem;
}

.page-action-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 0.4rem 0.8rem;
  font-size: 0.86rem;
  font-weight: 620;
  text-decoration: none;
  transition: 160ms ease;
  border: 1px solid var(--line-strong);
  background: var(--surface);
  color: var(--accent);
}

.page-action-link:hover {
  background: #f2f7f4;
  border-color: #9cb8ac;
}

.page-action-link.primary {
  background: var(--accent);
  border-color: transparent;
  color: #fff;
}

.page-action-link.primary:hover {
  background: #0b593d;
  color: #fff;
}

[data-lang-section][hidden] {
  display: none !important;
}

.pub-source-block + .pub-source-block {
  margin-top: 1.05rem;
  padding-top: 0.95rem;
  border-top: 1px solid var(--line);
}

.pub-source-title {
  margin: 0 0 0.6rem;
  font-size: 1rem;
  line-height: 1.4;
}

.pub-source-item {
  margin-bottom: 0.55rem;
  color: var(--text);
  font-size: 0.9rem;
  line-height: 1.6;
}

.pub-source-item:last-child {
  margin-bottom: 0;
}

.pub-source-item hr {
  display: none;
}

.pub-source-status {
  margin-top: 0.85rem;
  color: var(--muted);
  font-size: 0.84rem;
}

.feat-pub-section {
  margin-top: 1rem;
  display: grid;
  gap: 1rem;
}

.feat-paper-card {
  display: grid;
  grid-template-columns: minmax(280px, 42%) 1fr;
  gap: 1rem;
  align-items: stretch;
  background: linear-gradient(180deg, #ffffff 0%, #f9fbfa 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: 0 8px 26px rgba(22, 37, 30, 0.05);
  padding: 0.9rem;
}

.feat-paper-figure {
  margin: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--line);
  background: #eef3f1;
}

.feat-paper-figure img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 190px;
  object-fit: cover;
}

.feat-paper-content {
  display: grid;
  align-content: start;
  gap: 0.45rem;
}

.feat-paper-tag {
  margin: 0;
  font-size: 0.8rem;
  font-weight: 680;
  letter-spacing: 0.03em;
  color: var(--accent);
  text-transform: uppercase;
}

.feat-paper-title {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.35;
}

.feat-paper-summary {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.55;
}

.feat-paper-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 0.2rem;
}

.feat-paper-link,
.feat-paper-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 0.35rem 0.72rem;
  font-size: 0.84rem;
  font-weight: 620;
  text-decoration: none;
  transition: 160ms ease;
}

.feat-paper-link {
  border: 1px solid var(--line-strong);
  color: var(--accent);
  background: var(--surface);
}

.feat-paper-link:hover {
  border-color: #9cb8ac;
  background: #f2f7f4;
}

.feat-paper-btn,
.card a.feat-paper-btn,
.news-body a.feat-paper-btn {
  border: 1px solid transparent;
  background: var(--accent);
  color: #fff;
}

.feat-paper-btn:visited,
.feat-paper-btn:hover,
.feat-paper-btn:active,
.card a.feat-paper-btn:visited,
.card a.feat-paper-btn:hover,
.card a.feat-paper-btn:active,
.news-body a.feat-paper-btn:visited,
.news-body a.feat-paper-btn:hover,
.news-body a.feat-paper-btn:active {
  color: #fff;
}

.feat-paper-btn:hover,
.card a.feat-paper-btn:hover,
.news-body a.feat-paper-btn:hover {
  background: #0b593d;
  border-color: transparent;
  color: #fff;
}

.pub-section {
  margin-top: 1rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: 0 6px 24px rgba(22, 37, 30, 0.04);
  padding: 1rem 1.15rem;
}

.pub-filter {
  margin-top: 0.7rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.pub-filter label {
  font-size: 0.88rem;
  color: var(--muted);
}

.pub-year-select {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-size: 0.88rem;
  padding: 0.32rem 0.52rem;
}

.pub-category {
  margin: 0 0 0.8rem;
  font-size: 1.02rem;
  line-height: 1.35;
}

.pub-year-block + .pub-year-block {
  margin-top: 1.05rem;
  padding-top: 0.95rem;
  border-top: 1px solid var(--line);
}

.pub-year {
  margin: 0 0 0.55rem;
  font-size: 0.92rem;
  color: var(--accent);
  letter-spacing: 0.03em;
  font-weight: 680;
}

.pub-list {
  margin: 0;
  padding-left: 1.4rem;
}

.pub-item {
  color: var(--text);
  margin-bottom: 0.3rem;
}

.pub-title {
  margin: 0;
  color: var(--text);
  font-size: 0.95rem;
  line-height: 1.45;
  font-weight: 620;
}

.pub-meta {
  margin: 0.15rem 0 0;
  font-size: 0.87rem;
  color: var(--muted);
}

.pub-authors {
  margin: 0.16rem 0 0;
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.45;
}

.pub-details {
  margin: 0.12rem 0 0;
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.45;
}

.pub-doi {
  margin: 0.15rem 0 0;
  font-size: 0.84rem;
  color: var(--accent);
  text-decoration: none;
}

.pub-doi:hover {
  text-decoration: underline;
}

ul {
  margin: 0;
  padding-left: 1.1rem;
  line-height: 1.7;
  color: var(--muted);
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.2rem 0 1.7rem;
  color: var(--muted);
  font-size: 0.89rem;
}

.site-footer p {
  margin: 0;
}

.footer-layout {
  display: flex;
  justify-content: space-between;
  gap: 1.3rem;
}

.footer-left {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
}

.footer-logo {
  width: 80px;
  height: auto;
  flex: 0 0 auto;
  margin-top: 0.05rem;
}

.footer-org {
  display: grid;
  gap: 0.2rem;
}

.footer-group-name {
  color: var(--text);
  font-weight: 650;
}

.site-footer a {
  color: var(--accent);
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}

.footer-right {
  text-align: right;
  display: grid;
  gap: 0.2rem;
}

.footer-heading {
  margin: 0;
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 650;
}

.footer-copy {
  margin-top: 0.7rem;
  padding-top: 0.6rem;
  border-top: 1px solid var(--line);
  font-size: 0.82rem;
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 760px) {
  .site-header {
    border-radius: var(--radius-md);
    padding: 0.8rem;
    gap: 0.6rem;
  }

  .brand {
    min-width: 100%;
    gap: 0.55rem;
    margin-right: 0;
  }

  .brand-logo {
    width: 38px;
  }

  .brand-line {
    font-size: 0.76rem;
  }

  .brand-line-main {
    font-size: 0.88rem;
  }

  .brand-line-sub {
    font-size: 0.69rem;
  }

  .nav-toggle {
    display: inline-block;
  }

  .lang-switch {
    order: 3;
  }

  .site-nav {
    margin-top: 0.3rem;
    width: 100%;
    display: none;
    flex-direction: column;
    gap: 0.35rem;
    border-top: 1px solid var(--line);
    padding-top: 0.6rem;
  }

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

  .nav-link {
    border: 1px solid var(--line);
    background: var(--surface);
  }

  .content {
    padding-top: 1.2rem;
  }

  .facility-media {
    grid-template-columns: 1fr;
  }

  .atom-probe-video {
    width: 100%;
  }

  .feat-paper-card {
    grid-template-columns: 1fr;
    padding: 0.8rem;
  }

  .feat-paper-figure img {
    min-height: 165px;
  }

  .pub-section {
    padding: 0.95rem;
  }

  .pub-filter {
    width: 100%;
  }

  .pub-year-select {
    flex: 1;
  }

  .leader-head {
    flex-direction: column;
    align-items: flex-start;
  }

  .leader-photo {
    width: 120px;
    height: 120px;
  }

  .footer-layout {
    flex-direction: column;
    gap: 0.95rem;
  }

  .footer-right {
    text-align: left;
  }

  .news-item {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }

  .news-body {
    border-left: none;
    padding-left: 0;
  }

  .news-date {
    font-weight: 620;
  }
}